Sheerness tides today
- Tide now 13.6 ft ↑ rising · high 2:06 am (19.5 ft)
- Best time tomorrow 1:50–3:30 pm good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 0.1 ft · 57 °F calm (rippled) · 1.8 s from the west-southwest
- Wind · air 7 mph · 56 °F from the WSW, gusts 12 · overcast
- Sun 6:43 am–4:38 pm 9 h 54 min of daylight
- Moon 92% · 5:23 pm waning gibbous · rises at 5:23 pm
- Diving tomorrow 1:40–2:50 pm great day · 10/10
Today in Sheerness there are high tides at 1:26 am (19.6 ft) and 1:43 pm (20.0 ft) and low tides at 7:26 am and 7:51 pm. Tide coefficient 86. Right now the tide is rising toward the high tide at 2:06 am. The sun rises at 6:43 am and sets at 4:38 pm: 9 h 54 min of daylight. The moon is 92% illuminated (waning gibbous) and rises at 5:23 pm. Major solunar periods run from 12:19 am to 2:19 am and from 12:50 pm to 2:50 pm. The next spring tides arrive from October 26 to 28. The sea is calm (rippled), with 0.1 ft waves. There's a light breeze from the west-southwest (7 mph). Overcast, 56 °F.
Fishing in Sheerness today
Best time to fish
Solunar activity today: high- High tide at 1:43 pm, coefficient 86
- Major period 12:50–2:50 pm
- Rising pressure (+0.41 inHg in 24 h), moderate offshore wind (13 mph) and calm sea (0.5 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 86 (average tides)
- A minor period lines up with sunset
Your day at a glance
The best window, 12:50 pm to 2:40 pm, combines the 1:43 pm high tide and a major period, though with rising pressure and moderate wind. Also worth a try from 6:30 am to 7:30 am, with the 7:26 am low tide and sunrise, though with rising pressure and moderate wind. Also worth a try from 12:30 am to 2:20 am, with the 1:26 am high tide and a major period, though with rising pressure and moderate wind.
Species with the most records nearby: thornback ray, European flounder, small-spotted catshark and common sole. October is one of the months when these are seen most: thornback ray and whiting. What you can catch
Beach day in Sheerness
Is it a beach day?
- Sun and clouds
- Calm for swimming: 0.6 ft waves
- Low tide at 7:26 am: more sand
- Feels like 54 °F: chilly for the beach
- Moderate offshore wind (17 mph): it blows floats and inflatables out to sea
- Water at 57 °F (very cold)
Today, hour by hour
- Swimming Calm · 0.6 ft
0.6 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 57 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 1 · SPF 15
Max UV 1 (low): SPF 15 sunscreen.
- Wind 17 mph
Moderate offshore wind (17 mph). Skip the inflatables: offshore wind carries them out to sea.
- Tide & sand 7:26 am
Low tide at 7:26 am and 7:51 pm: that's when there's the most sand. High tide at 1:26 am and 1:43 pm.
We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority. How it works · The next 7 days
Beaches near Sheerness
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Sheerness Beach 0.2 mi · NW
- RNLI lifeguards in season
- Parking
Excellent water quality 2025 season, Environment Agency
- Minster Leas Beach 1.9 mi · E
Excellent water quality 2025 season, Environment Agency
- Cockleshell Hard 2.0 mi · W
- Grain Beach 2.3 mi · NW
- Parking
- Yantlet Beach 4.4 mi · NW
- Allhallows Beach 5.8 mi · NW
- Parking
- Southend Beach 6.1 mi · N
- Restrooms
- Parking
Good water quality 2025 season, Environment Agency
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL).
UK bathing water quality: Environment Agency. Contains public sector information licensed under the Open Government Licence v3.0. Full attribution. Lifeguards: RNLI. Contains Open Data licensed under the GIS Open Data Licence.
Webcams near Sheerness
Webcams provided by windy.com — add a webcam
Tides in Sheerness
Today's high and low tides
- ▲ High tide 1:26 am 19.6 ft · coef. 86
- ▼ Low tide 7:26 am 3.1 ft
- ▲ High tide 1:43 pm 20.0 ft · coef. 86
- ▼ Low tide 7:51 pm 2.6 ft
↑ Rising The tide is rising. 2 h 25 min to high tide at 2:06 am.
Tide coefficient 86 for the 1:26 am high tide and 86 for the 1:43 pm high tide. Average coefficient. The water rises and falls 17.4 ft between the highest high and the lowest low: a large range for this place. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides. What is the tide coefficient?
2026 extremes: the highest tide of the year is on September 12 (20.7 ft) and the lowest, on March 20 (1.1 ft).
Semidiurnal: two high and two low tides a day, of similar height.
Heights above chart datum: the lowest astronomical tide (LAT), the zero of nautical charts in Europe. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. chart datum (LAT)
Tide coefficient and range in October
The biggest tides of the month came from October 10 to 12 (coefficient 88, 18.6 ft range). The smallest, on October 20 (coefficient 43, 9.2 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Wed 28 | 6:43 am · 4:38 pm | High tide 1:26 am · 19.6 ft | Low tide 7:26 am · 3.1 ft | High tide 1:43 pm · 20.0 ft | Low tide 7:51 pm · 2.6 ft | Coef. 86 | 92% | Major periods 12:19 am · 12:50 pm | High |
| Thu 29 | 6:45 am · 4:36 pm | High tide 2:06 am · 19.5 ft | Low tide 8:02 am · 3.0 ft | High tide 2:26 pm · 19.8 ft | Low tide 8:27 pm · 3.1 ft | Coef. 85 | 85% | Major periods 1:22 am · 1:54 pm | Medium |
| Fri 30 | 6:47 am · 4:34 pm | High tide 2:47 am · 19.2 ft | Low tide 8:41 am · 3.0 ft | High tide 3:11 pm · 19.4 ft | Low tide 9:08 pm · 3.7 ft | Coef. 82 | 76% | Major periods 2:27 am · 2:59 pm | Medium |
| Sat 31 | 6:48 am · 4:32 pm | High tide 3:32 am · 18.8 ft | Low tide 9:25 am · 3.2 ft | High tide 4:00 pm · 18.7 ft | Low tide 9:55 pm · 4.5 ft | Coef. 77 | 65% | Major periods 3:30 am · 4:00 pm | Medium |
| Sun 1 | 6:50 am · 4:30 pm | High tide 4:22 am · 18.1 ft | Low tide 10:18 am · 3.6 ft | High tide 4:55 pm · 17.9 ft | Low tide 10:55 pm · 5.4 ft | Coef. 70 | Last quarter | Major periods 4:29 am · 4:56 pm | Medium |
| Mon 2 | 6:52 am · 4:28 pm | High tide 5:19 am · 17.3 ft | Low tide 11:26 am · 4.1 ft | High tide 5:59 pm · 17.0 ft | — | Coef. 63 | 43% | Major periods 5:22 am · 5:48 pm | Medium |
| Tue 3 | 6:54 am · 4:27 pm | Low tide 12:13 am · 6.0 ft | High tide 6:26 am · 16.8 ft | Low tide 12:56 pm · 4.3 ft | High tide 7:14 pm · 16.6 ft | Coef. 59 | 32% | Major periods 6:12 am · 6:35 pm | Medium |
▲ high tide · ▼ low tide · heights above chart datum (LAT). Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Tides from the Sheerness station (Environment Agency), 0.9 mi from Sheerness. Times and heights are its predictions.
Station data attribution: This uses Environment Agency tide gauge data from the real-time data API (Beta): Sheerness (E71524), https://environment.data.gov.uk/flood-monitoring/id/stations/E71524. Contains public sector information licensed under the Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Modified: harmonic constants fitted by TidePlanet from the 15-minute sea levels of 2025-10-29 to 2026-10-22 (356 days).
The sea at Sheerness
Sea stateSea state: calm (rippled)
The waves you may find
- Most commonMost common0.0 ft
- Significant0.1 ft
- Highest expectedHighest0.1 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 0.1 ft. Before heading out, expect waves of up to 0.1 ft.
Wind on the coast and offshore
Offshore wind. The coast faces east and the wind blows from land out to sea: calm shore and clean waves, but watch the drift out to sea.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Monday 2: 1.9 ft with a period of 4 s, from the northeast (slight).
Water temperature
Water temperature →Water temperature changes how fish behave: in very cold or very warm water they feed less. The water is steady these days, with no sudden changes.
Water about normal for late October.
Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses
Water temperature →Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 11:41 pm (local time).
Nearest marine station
This is a real measurement of the sea, not a forecast. Data from Channel Coastal Observatory (CCO), National Network of Regional Coastal Monitoring Programmes (NNRCMP), via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Surf in Sheerness today
Surf today
Flat- Barely any waves (0.1 ft sets): flat
- Moderate offshore wind (13 mph): it holds up and grooms the waves
- Falling tide (low tide at 7:51 pm)
It’s flat today: almost no waves reach this coast.
- Light: First light 6:08 am · sunrise 6:43 am · sunset 4:38 pm · last light 5:12 pm
- Tide: high 1:26 am (19.6 ft), low 7:26 am (3.1 ft), high 1:43 pm (20.0 ft) and low 7:51 pm (2.6 ft). Every break has its own tide: some work at low tide and others at high tide. The tide doesn’t change the score here.
- Water at 57.2 °F: a 4/3 fullsuit (booties if you run cold).
- Energy: 0 kJ · Low power
Today’s surf at a glance
The best window, 1:00 pm to 5:00 pm, has light offshore wind, though with barely any waves.
An estimate for this stretch of coast, not for a specific break: every beach or reef works its own way (its tide, bottom and angle). Check it when you get there.
Follow the flags and the lifeguards, and don’t paddle out if the surf is above your level: this score is a guide, not a substitute for what you see when you get there.
Diving in Sheerness today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (1:43 pm): little current from 1:28 pm to 2:00 pm
- 0.1 ft swell at 2 s from the southwest: barely any surge
- Moderate offshore wind (13 mph): it pushes surface swimmers away from shore
- 0.4 mph current toward the east-northeast, weak (model)
- Sun high: more light underwater
- Slack water today: high tide 1:26 am (1:10–1:41 am), low tide 7:26 am (6:50–7:50 am), high tide 1:43 pm (1:28–2:00 pm) and low tide 7:51 pm (7:10–8:20 pm)
- Likely visibility: good. The sea has been calm and there's been little rain. Based on the last 24 hours of data.
- Water at 57.2 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: doable, with some waves or wind.
- Night dive: dark from 5:12 pm. Waning gibbous (92%), rising at 5:23 pm: a bright night.
Your diving day at a glance
The best window, 1:00 pm to 2:20 pm, combines slack water at high tide, little swell, weak current and the sun high, though with moderate wind. Also worth a look from 6:40 am to 8:10 am, with slack water at low tide, little swell and weak current, though with moderate wind.
Slack water comes from the tide: in inlets, channels and between islands the water can keep running for an hour or two after. Ask the local dive shop.
Never dive alone and check with the local dive shop: this rating is a guide, not a substitute for a professional.
Dive sites, wrecks and dive shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Buckland Lake Reserve 12 mi
- Richard Montgomery 2.0 mi
- Lion (part Of) 2.2 mi
- Wreck 1.1 mi
- Wreck 1.2 mi
- Wreck 1.4 mi
- Wreck 2.1 mi
- Wreck 2.3 mi
- Salt Fleet Flats Reserve 10.0 mi
- Scuba Solutions 4.9 mi
- Southend Diving 8.0 mi
- Dive Odyssea 10 mi
Within 12 mi. Some may be missing or closed; marine reserves usually need a permit. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Wreck and reef positions are approximate and not for navigation; a wreck’s depth runs from the top of the hull to the seabed.
Sites: © OpenStreetMap contributors (ODbL). Wrecks: EMODnet Human Activities (AND-International), from UK Hydrographic Office data, CC BY 4.0. Contains public sector information licensed under the Open Government Licence v3.0.
Weather in Sheerness
Now in Sheerness
- Low / high
- 50 / 60 °F
- Rain
- 0.00 in · 0%
- Clouds
- 100%
- Humidity
- 84%
- Dew pointDew point
- 51 °F
- Visibility
- 14 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Moderate · 42
- Saharan dust
- No
- Pollen
- None
Pressure and fishing
- ↗ RisingRising Anglers say fish bite less for a while
- → SteadySteady · now Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Steady now (0.00 inHg in 3 hours). Over the next 48 hours: +0.10 inHg. Steady pressure: anglers expect normal activity. Fast changes, either way, tend to affect fishing.
Today, hour by hourHour by hour
Bars: mean wind. Dashed line: gusts. Arrows point where the wind blows to.
| Time | 12:00 am | 3:00 am | 6:00 am | 9:00 am | 12:00 pm | 3:00 pm | 6:00 pm | 9:00 pm |
|---|---|---|---|---|---|---|---|---|
| Sky | Clear | Clear | Mainly clear | Partly cloudy | Overcast | Partly cloudy | Partly cloudy | Overcast |
| Temperature | 53° | 51° | 50° | 53° | 58° | 60° | 58° | 57° |
| Wind (mph) | 15 WSW | 14 WSW | 12 SW | 14 SW | 17 WSW | 13 WSW | 10 WSW | 11 WSW |
| Gusts | 19 | 19 | 18 | 20 | 23 | 18 | 13 | 15 |
| Waves | 0.3 ft | 0.3 ft | 0.2 ft | 0.3 ft | 0.3 ft | 0.6 ft | 0.5 ft | 0.1 ft |
| Rain | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 12:00 am 56° 6 WSW 0.1 ft
- 3:00 am 53° 5 SSW 0.1 ft
- 6:00 am 52° 5 SW 0.1 ft
- 9:00 am 53° 1 WNW 0.0 ft
- 12:00 pm 55° 3 NNE 0.0 ft
- 3:00 pm 56° 5 ENE 0.1 ft
- 6:00 pm 57° 11 E 0.1 ft
- 9:00 pm 56° 7 ESE 0.1 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 50 / 60 °F | 17 mph WSW | 0.6 ft | 1:26 am · 1:43 pm | |
| Thu 29 | 48 / 57 °F | 11 mph SSE | 0.1 ft | 2:06 am · 2:26 pm | |
| Fri 30 | 47 / 57 °F | 17 mph ESE | 0.7 ft | 2:47 am · 3:11 pm | |
| Sat 31 | 52 / 56 °F | 9 mph E | 0.7 ft | 3:32 am · 4:00 pm | |
| Sun 1 | 51 / 53 °F | 10 mph NNW | 0.7 ft | 4:22 am · 4:55 pm | |
| Mon 2 | 49 / 54 °F | 15 mph N | 1.9 ft | 5:19 am · 5:59 pm | |
| Tue 3 | 50 / 54 °F | 14 mph NNE | 1.8 ft | 6:26 am · 7:14 pm | |
| Wed 4 | 46 / 54 °F | 11 mph NE | 1.6 ft | 7:43 am · 8:35 pm | |
| Thu 5 | 44 / 53 °F | 11 mph ENE | 1.4 ft | 8:59 am · 9:44 pm | |
| Fri 6 | 43 / 52 °F | 11 mph ENE | 1.1 ft | 10:01 am · 10:37 pm | |
| Sat 7 | 40 / 49 °F | 7 mph ESE | 2.1 ft | 10:52 am · 11:21 pm | |
| Sun 8 | 49 / 57 °F | 8 mph S | 0.5 ft | 11:36 am | |
| Mon 9 | 53 / 57 °F | 10 mph S | 0.6 ft | 12:00 am · 12:16 pm | |
| Tue 10 | 54 / 61 °F | 14 mph SSW | 0.9 ft | 12:36 am · 12:53 pm |
- Thu 29 Overcast 48° / 57° 0.1 ft
- Fri 30 Partly cloudy 47° / 57° 0.7 ft
- Sat 31 Overcast 52° / 56° 0.7 ft
- Sun 1 Overcast 51° / 53° 0.7 ft
- Mon 2 Light drizzle 49° / 54° 1.9 ft
- Tue 3 Light drizzle 50° / 54° 1.8 ft
- Wed 4 Light drizzle 46° / 54° 1.6 ft
Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.
- The models They agree · high confidence for the next few days. See the models →
- Outlook The next few weeks look normal for the time of year. See the outlook →
- Normal Today, warmer than normal for late October (+3.9 °F; normal high: 56 °F). Climate by month →
Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 11:41 pm (local time).
The sun in Sheerness
Sunrise and sunset
- First light 5:29 am
- Full dark 5:51 pm
- Civil dawn 6:08 am
- Civil dusk 5:12 pm
- Solar noon 11:41 am (25° high)
- Daylight 9 h 54 min (−4 min)
- Evening golden hour 3:49 pm
- Full dark 5:51 pm
Golden hour and the day-night map
Today the sun is 92,359,913 mi away and looks 32′ 11″ across.
The moon in Sheerness
Moon phase and position
Today the moon is 226,451 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 12:19–2:19 am Major · the moon passes overhead · high activity
- 12:50–2:50 pm Major · the moon passes underfoot · high activity
- 9:41–10:41 am Minor · moonset · medium activity
- 4:53–5:53 pm Minor · moonrise · medium activity
According to solunar theory, fish feed more when the moon passes overhead or underfoot (major periods, about 2 h) and when it rises or sets (minor periods, 1 h). It works best around new and full moon.
Upcoming moon phases
2026 moon calendar →- Last quarter Sun, Nov 1 · 8:29 pmNov 1 in 4 days
- New moon Mon, Nov 9 · 7:03 amNov 9 in 12 days
- First quarter Tue, Nov 17 · 11:48 amNov 17 in 20 days
- Full moon Tue, Nov 24 · 2:54 pmNov 24 in 27 days
Perigee on October 28, 226,426 mi away, coinciding with the spring tides from October 26 to 28: they will be stronger than usual.
Where to fish in Sheerness
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Barge Pier 5.6 mi
- Stones Fishing Lakes 0.8 mi
- Newman Drive Fishing Lake 5.7 mi
- The Willows 6.8 mi
- Boat ramp 1.9 mi
- Boat ramp 3.5 mi
- Boat ramp 5.6 mi
- Swale Marina 6.8 mi
- Queenborough Harbour 2.3 mi
- M & A Tackle 0.2 mi
- Monster Baits 0.6 mi
- Stones fishing lakes 0.8 mi
Within 9.3 mi. A spot may be missing or closed. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Spots: © OpenStreetMap contributors (ODbL) and Overture Maps.
Water depth
Very shallowVery shallow and flat: 3.1 mi from shore the water is still only about 19 ft deep.
From the shoreline (950 ft from Sheerness) out to sea, heading east.
How far from shore
- 16 ft deep2.9 mi
- 33 ft deepnot within 3.1 mi
- 66 ft deepnot within 3.1 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 2.9 mi): cast far from the beach and fish the high tide, when there is more water close in.
- Swimming. A very gentle way in with plenty of shallow water, good for kids. At low tide the water can be far out.
- Diving. Shallow: the water doesn't reach 33 ft within 3.1 mi. For deeper dives, take a boat farther out.
Source: EMODnet Bathymetry DTM 2024 (CC BY 4.0), cells of about 380 ft; depth at the lowest astronomical tide. For reference only: not for navigation or anchoring.
Tides near SheernessTides nearby
- Queenborough1.8 mi
- Grain2.5 mi
- Iwade4.6 mi
- Eastchurch4.7 mi
- Allhallows5.8 mi
- Lower Halstow6.1 mi
- Upchurch6.6 mi
- Thorpe Bay6.7 mi
- Sittingbourne7.0 mi
- Southend-on-Sea7.0 mi
Sheerness at a glance
- Town or city of about 13,249 people. Coordinates: 51.440° N, 0.763° E.
- It is 32 mi northwest of Dover, the main place in Kent. The sun rises 3 min later and sets 1 min later than in Dover.
- The nearest tide station, Sheerness, is 0.9 mi to the northwest.
- Its coast faces east.
- Beaches and harbors nearby: London Thamesport (3.4 mi), Yantlet beach (4.4 mi).
Questions about SheernessQuestions
What time is high tide today in Sheerness?
Today in Sheerness there are high tides at 1:26 am (19.6 ft) and 1:43 pm (20.0 ft) and low tides at 7:26 am and 7:51 pm. Tide coefficient 86.
What time is sunset today in Sheerness?
At 4:38 pm. There is light until the end of civil twilight, at 5:12 pm.
What time is sunrise tomorrow in Sheerness?
At 6:45 am. First light comes at 5:31 am.
What phase is the moon today?
Waning gibbous, 92% illuminated. New moon on Mon, Nov 9 · 7:03 am.
When are the next spring tides?
From October 26 to 28, together with the lunar perigee: they will be stronger than usual.
What are today's solunar periods?
Major 12:19–2:19 am, Minor 9:41–10:41 am, Major 12:50–2:50 pm, Minor 4:53–5:53 pm. Today's activity is high.
What's the weather like today in Sheerness?
Overcast, from 50 °F to 60 °F, with a light breeze from the west-southwest (7 mph) and a 0% chance of rain.
How is the sea today in Sheerness?
Calm (rippled) (Douglas 1): 0.1 ft waves with a period of 1.8 s from the west-southwest. The water is 57.2 °F.
When is the best time to visit Sheerness?
The best time to visit Sheerness is from July to August: highs of 72 °F, about 8 rainy days a month and 6 hours of sunshine a day.
Can I use this data for navigation?
No. These are predictions for fishing and leisure; for navigation, use the official publications.
Where this data comes from
Tide: Sheerness tide gauge (UK National Tide Gauge Network). This uses Environment Agency tide gauge data from the real-time data API (Beta), under the Open Government Licence v3.0; constants fitted by TidePlanet from a year of its readings. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).