Llangoed tides today
- Tide now 20.2 ft ↑ rising · high 11:54 pm (27.5 ft)
- Best time tomorrow 6:30–7:40 am average day · 6/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 1.3 ft · 54 °F smooth · 2.8 s from the southwest
- Wind · air 7 mph · 54 °F from the SSW, gusts 12 · overcast
- Sun 7:07 am–4:52 pm 9 h 45 min of daylight
- Moon 92% · 5:30 pm waning gibbous · rises at 5:30 pm
- Diving tomorrow 11:20 am–1:20 pm great day · 10/10
Today in Llangoed there are high tides at 11:31 am (27.5 ft) and 11:54 pm (27.5 ft) and low tides at 5:53 am and 6:17 pm. Tide coefficient 91. Right now the tide is rising toward the high tide at 11:54 pm. The sun rises at 7:07 am and sets at 4:52 pm: 9 h 45 min of daylight. The moon is 92% illuminated (waning gibbous) and rises at 5:30 pm. Major solunar periods run from 12:39 am to 2:39 am and from 1:10 pm to 3:10 pm. The next spring tides arrive from October 26 to 28. The sea is smooth, with 1.3 ft waves. There's a light breeze from the south-southwest (7 mph). Overcast, 54 °F.
Fishing in Llangoed today
Best time to fish
Solunar activity today: high- Low tide at 6:17 pm
- Minor period 5:00–6:00 pm (moonrise)
- Sunset at 4:52 pm, golden hour from 4:01 pm
- Rising pressure (+0.35 inHg in 24 h), light offshore wind (10 mph) and calm sea (1.4 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 91 (spring tides)
- A minor period lines up with sunset
Your day at a glance
The best window, 5:00 pm to 6:00 pm, combines the 6:17 pm low tide, moonrise and sunset, though with rising pressure.
Species with the most records nearby: European plaice, small-spotted catshark, common sole and whiting. October is one of the months when these are seen most: European plaice and common sole. What you can catch
Beach day in Llangoed
Is it a beach day?
- Calm for swimming: 2.5 ft waves
- Cloudy (77% cloud cover)
- Feels like 50 °F: chilly for the beach
- Fresh offshore wind (21 mph): it blows floats and inflatables out to sea
- Water at 54 °F (very cold)
- High tide at 11:31 am, coefficient 91: little sand left
Today, hour by hour
- Swimming Calm · 2.5 ft
2.5 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 54 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 1 · SPF 15
Max UV 1 (low): SPF 15 sunscreen.
- Wind 21 mph
Fresh offshore wind (21 mph): blowing sand. Skip the inflatables: offshore wind carries them out to sea.
- Tide & sand 5:53 am
Low tide at 5:53 am and 6:17 pm: that's when there's the most sand. High tide at 11:31 am and 11:54 pm. Coefficient 91 (spring tides): little sand left at high tide.
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 Llangoed
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Llanddona Beach 2.9 mi · W
Excellent water quality 2025 season, Natural Resources Wales
- Llanfairfechan Beach 4.9 mi · SE
Excellent water quality 2025 season, Natural Resources Wales
- Benllech Sands 5.2 mi · W
- Restrooms
- Parking
Good water quality 2025 season, Natural Resources Wales
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: Natural Resources Wales. Contains public sector information licensed under the Open Government Licence v3.0. Full attribution.
Webcams near Llangoed
Webcams provided by windy.com — add a webcam
Tides in Llangoed
Today's high and low tides
- ▼ Low tide 5:53 am 3.7 ft
- ▲ High tide 11:31 am 27.5 ft · coef. 91
- ▼ Low tide 6:17 pm 3.7 ft
- ▲ Next high tide 11:54 pm 27.5 ft · coef. 90
↑ Rising The tide is rising. 2 h 4 min to high tide at 11:54 pm.
Tide coefficient 91 for the 11:31 am high tide and 90 for the 11:54 pm high tide. Spring tides. The water rises and falls 23.8 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 August 15 (28.2 ft) and the lowest, on August 14 (1.5 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 26 to 28 (coefficient 92, 24.3 ft range). The smallest, from October 19 to 20 (coefficient 36, 8.9 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 | 7:07 am · 4:52 pm | Low tide 5:53 am · 3.7 ft | High tide 11:31 am · 27.5 ft | Low tide 6:17 pm · 3.7 ft | High tide 11:54 pm · 27.5 ft | Coef. 91 | 92% | Major periods 12:39 am · 1:10 pm | High |
| Thu 29 | 7:09 am · 4:50 pm | Low tide 6:37 am · 4.3 ft | High tide 12:13 pm · 27.2 ft | Low tide 7:03 pm · 4.2 ft | — | Coef. 88 | 85% | Major periods 1:42 am · 2:15 pm | Medium |
| Fri 30 | 7:11 am · 4:48 pm | High tide 12:40 am · 26.7 ft | Low tide 7:24 am · 5.4 ft | High tide 1:01 pm · 26.5 ft | Low tide 7:55 pm · 5.1 ft | Coef. 85 | 76% | Major periods 2:47 am · 3:19 pm | Medium |
| Sat 31 | 7:13 am · 4:46 pm | High tide 1:33 am · 25.4 ft | Low tide 8:17 am · 6.7 ft | High tide 1:55 pm · 25.4 ft | Low tide 8:54 pm · 6.1 ft | Coef. 76 | 65% | Major periods 3:50 am · 4:20 pm | Medium |
| Sun 1 | 7:15 am · 4:44 pm | High tide 2:35 am · 23.8 ft | Low tide 9:19 am · 8.0 ft | High tide 2:59 pm · 24.0 ft | Low tide 10:03 pm · 7.0 ft | Coef. 66 | Last quarter | Major periods 4:49 am · 5:16 pm | Medium |
| Mon 2 | 7:17 am · 4:42 pm | High tide 3:50 am · 22.4 ft | Low tide 10:31 am · 8.8 ft | High tide 4:19 pm · 23.0 ft | Low tide 11:20 pm · 7.2 ft | Coef. 57 | 43% | Major periods 5:43 am · 6:08 pm | Medium |
| Tue 3 | 7:19 am · 4:41 pm | High tide 5:16 am · 21.9 ft | Low tide 11:49 am · 8.9 ft | High tide 5:45 pm · 22.9 ft | — | Coef. 56 | 32% | Major periods 6:32 am · 6:56 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
Llangoed has no station of its own, so we use the tide at Llandudno (Environment Agency), 11 mi away. On the open coast the difference is usually a few minutes and inches; inside estuaries, rivers and enclosed bays it can be much larger.
Station data attribution: This uses Environment Agency tide gauge data from the real-time data API (Beta): Llandudno (E73324), https://environment.data.gov.uk/flood-monitoring/id/stations/E73324. 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 Llangoed
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.7 ft
- Significant1.3 ft
- Highest expectedHighest2.8 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.8 ft. Before heading out, expect waves of up to 2.8 ft.
Wind on the coast and offshore
Offshore wind. The coast faces north 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 ease over the next few days. The biggest waves arrive on Wednesday 28: 2.8 ft with a period of 3 s, from the southwest (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 9:50 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS), via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Surf in Llangoed today
Surf today
Flat- Barely any waves (0.9 ft sets): flat
- Fresh offshore wind (19 mph): it holds up and grooms the waves
- Falling tide (low tide at 6:17 pm)
It’s flat today: almost no waves reach this coast.
- Light: First light 6:31 am · sunrise 7:07 am · sunset 4:52 pm · last light 5:29 pm
- Tide: low 5:53 am (3.7 ft), high 11:31 am (27.5 ft), low 6:17 pm (3.7 ft) and high 11:54 pm (27.5 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 53.6 °F: a 5/4 fullsuit with booties (and a hood if it’s windy).
- Energy: 5 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 Llangoed today
Diving and snorkeling today
Likely visibility: fair- Some tidal current
- 0.7 ft swell at 4 s from the west-northwest: barely any surge
- Light offshore wind (12 mph)
- 0.1 mph current toward the east, weak (model)
- Low light: twilight
- Slack water today: low tide 5:53 am (5:30–6:20 am), high tide 11:31 am (11:10–11:50 am), low tide 6:17 pm (5:50–6:40 pm) and high tide 11:54 pm (11:39 pm–12:10 am)
- Likely visibility: fair. Rain (0.31 in) and wind over the last few days have stirred up the water. Based on the last 24 hours of data.
- Water at 53.6 °F: a 7 mm semi-dry suit, with hood, gloves and booties.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 5:29 pm. Waning gibbous (92%), rising at 5:30 pm: a bright night.
Your diving day at a glance
The best window, 4:20 pm to 5:30 pm, combines little swell, light wind and weak current, though with tidal current and low light. Also worth a look from 11:10 am to 12:00 pm, with slack water at high tide, little swell, weak current and the sun high, though with fresh 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
- Manx Fairy 0.8 mi
- Marie Moller 1.6 mi
- Hoveringham 2 1.8 mi
- Lynkar 2.5 mi
- Wreck 1.5 mi
- Wreck 1.7 mi
- Wreck 1.8 mi
- Wreck 2.2 mi
- Wreck 2.2 mi
- Wreck 2.3 mi
- Vivian Quarry 12 mi
- Vivian Diving Centre 12 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 Llangoed
Now in Llangoed
- Low / high
- 52 / 58 °F
- Rain
- 0.19 in · 100%
- Clouds
- 100%
- Humidity
- 88%
- Dew pointDew point
- 51 °F
- Visibility
- 16 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 24
- 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 (+0.02 inHg in 3 hours). Over the next 48 hours: +0.14 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 | Partly cloudy | Light rain | Light rain | Partly cloudy | Partly cloudy | Overcast | Overcast | Overcast |
| Temperature | 52° | 53° | 56° | 56° | 58° | 57° | 55° | 54° |
| Wind (mph) | 20 SW | 22 SW | 24 SW | 21 SW | 21 SW | 18 SW | 10 SSW | 8 SSW |
| Gusts | 33 | 33 | 41 | 32 | 33 | 30 | 18 | 13 |
| Waves | 2.3 ft | 2.6 ft | 2.8 ft | 2.4 ft | 2.1 ft | 1.7 ft | 1.4 ft | 1.3 ft |
| Rain | 0.00 in | 0.02 in | 0.05 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 9:00 pm 54° 8 SSW 1.3 ft
- 12:00 am 54° 7 SSW 1.2 ft
- 3:00 am 54° 6 SW 0.9 ft
- 6:00 am 53° 3 SSW 0.8 ft
- 9:00 am 55° 4 SW 0.9 ft
- 12:00 pm 59° 6 SSW 0.7 ft
- 3:00 pm 59° 6 SSW 0.5 ft
- 6:00 pm 53° 1 SE 0.3 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 52 / 58 °F | 24 mph SW | 2.8 ft | 11:31 am · 11:54 pm | |
| Thu 29 | 49 / 60 °F | 7 mph SSW | 1.2 ft | 12:13 pm | |
| Fri 30 | 46 / 59 °F | 3 mph NNW | 0.3 ft | 12:40 am · 1:01 pm | |
| Sat 31 | 46 / 58 °F | 4 mph ESE | 0.3 ft | 1:33 am · 1:55 pm | |
| Sun 1 | 48 / 52 °F | 9 mph NE | 1.0 ft | 2:35 am · 2:59 pm | |
| Mon 2 | 47 / 52 °F | 10 mph ENE | 1.4 ft | 3:50 am · 4:19 pm | |
| Tue 3 | 44 / 52 °F | 6 mph E | 1.0 ft | 5:16 am · 5:45 pm | |
| Wed 4 | 45 / 52 °F | 8 mph E | 1.8 ft | 6:37 am · 7:01 pm | |
| Thu 5 | 45 / 53 °F | 11 mph E | 2.1 ft | 7:41 am · 8:01 pm | |
| Fri 6 | 42 / 50 °F | 11 mph ESE | 1.7 ft | 8:31 am · 8:48 pm | |
| Sat 7 | 42 / 50 °F | 6 mph SE | 3.1 ft | 9:12 am · 9:29 pm | |
| Sun 8 | 46 / 51 °F | 5 mph ESE | 3.0 ft | 9:48 am · 10:04 pm | |
| Mon 9 | 49 / 58 °F | 6 mph SSE | 3.1 ft | 10:21 am · 10:37 pm | |
| Tue 10 | 52 / 57 °F | 3 mph SE | 1.5 ft | 10:53 am · 11:08 pm |
- Thu 29 Overcast 49° / 60° 1.2 ft
- Fri 30 Overcast 46° / 59° 0.3 ft
- Sat 31 Partly cloudy 46° / 58° 0.3 ft
- Sun 1 Overcast 48° / 52° 1.0 ft
- Mon 2 Overcast 47° / 52° 1.4 ft
- Tue 3 Overcast 44° / 52° 1.0 ft
- Wed 4 Overcast 45° / 52° 1.8 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 (+2.7 °F; normal high: 55 °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 9:50 pm (local time).
The sun in Llangoed
Sunrise and sunset
- First light 5:50 am
- Full dark 6:09 pm
- Civil dawn 6:31 am
- Civil dusk 5:29 pm
- Solar noon 12:00 pm (24° high)
- Daylight 9 h 45 min (−4 min)
- Evening golden hour 4:01 pm
- Full dark 6:09 pm
Golden hour and the day-night map
Today the sun is 92,359,584 mi away and looks 32′ 11″ across.
The moon in Llangoed
Moon phase and position
Today the moon is 226,451 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 12:39–2:39 am Major · the moon passes overhead · high activity
- 1:10–3:10 pm Major · the moon passes underfoot · high activity
- 10:15–11:15 am Minor · moonset · medium activity
- 5:00–6:00 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 Llangoed
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Beaumaris Pier 2.2 mi
- Bangor Pier 4.1 mi
- St George's Pier 5.6 mi
- Graigllwyd Springs 7.5 mi
- Fryars Slipway 1.3 mi
- Boat ramp 2.2 mi
- Boat ramp 2.8 mi
- Boat ramp 4.2 mi
- Porth Daniel 5.7 mi
- Port Dinorwic Marina 8.8 mi
- Anglesey Bait Centre 2.7 mi
- Menai Tackle and Bait 5.7 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
Gentle slopeThe bottom slopes gently: 16 ft deep 600 ft from shore and 33 ft at 0.6 mi.
From the shoreline (1.4 mi from Llangoed) out to sea, heading north.
How far from shore
- 16 ft deep600 ft
- 33 ft deep0.6 mi
- 66 ft deep2.5 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 600 ft): 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. 33 ft deep 0.6 mi from shore; 66 ft is far out (2.5 mi): for deeper dives, go by boat.
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.
Nearest lighthouse
.jpg)
Trwyn Du Lighthouse 2.3 mi northeast
- Light
- A white flash every 5 s · Fl W 5s
- Range
- 12 nautical miles (14 mi)
- Light height
- 62 ft above sea level
- Tower height
- 95 ft
- Built
- 1838
Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Wikipedia · Wikidata · Sources and licenses
Tides near LlangoedTides nearby
- Beaumaris2.2 mi
- Bangor4.9 mi
- Llanfairfechan5.3 mi
- Menai Bridge5.7 mi
- Benllech6.0 mi
- Penmaenmawr6.7 mi
- Llanfairpwllgwyngyll6.9 mi
- Y Felinheli8.8 mi
- Conwy11 mi
- Deganwy11 mi
Llangoed at a glance
- Town or city of about 849 people. Coordinates: 53.294° N, 4.088° W.
- It is 22 mi east of Holyhead, the main place in Anglesey. The sun rises 2 min earlier and sets 2 min earlier than in Holyhead.
- The nearest tide station, Llandudno, is 11 mi to the east.
- Its coast faces north.
Questions about LlangoedQuestions
What time is high tide today in Llangoed?
Today in Llangoed there are high tides at 11:31 am (27.5 ft) and 11:54 pm (27.5 ft) and low tides at 5:53 am and 6:17 pm. Tide coefficient 91.
What time is sunset today in Llangoed?
At 4:52 pm. There is light until the end of civil twilight, at 5:29 pm.
What time is sunrise tomorrow in Llangoed?
At 7:09 am. First light comes at 5:52 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 12:39–2:39 am, Minor 10:15–11:15 am, Major 1:10–3:10 pm, Minor 5:00–6:00 pm. Today's activity is high.
What's the weather like today in Llangoed?
Light rain, from 52 °F to 58 °F, with a light breeze from the south-southwest (7 mph) and a 100% chance of rain.
How is the sea today in Llangoed?
Smooth (Douglas 2): 1.3 ft waves with a period of 2.8 s from the southwest. The water is 54.0 °F.
When is the best time to visit Llangoed?
The best time to visit Llangoed is from June to August: highs of 64 °F to 67 °F, about 12 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: Llandudno 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).