St. Helens tides today
- Tide now 7.1 ft ↓ falling · low 6:01 am (1.9 ft)
- Best time to fish 6:20–7:00 am average day · 6/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 1.1 ft · 59 °F smooth · 6.6 s from the southwest
- Wind · air 3 mph · 54 °F from the SSW, gusts 5 · overcast
- Sun 6:51 am–4:45 pm 9 h 54 min of daylight
- Moon 85% · 6:32 pm waning gibbous · rises at 6:32 pm
- Best time to dive 11:50 am–12:30 pm good day · 8/10
Today in St. Helens there are high tides at 1:00 am (13.0 ft) and 1:18 pm (13.0 ft) and low tides at 6:01 am and 6:24 pm. Tide coefficient 89. Right now the tide is falling toward the low tide at 6:01 am. The sun rises at 6:51 am and sets at 4:45 pm: 9 h 54 min of daylight. The moon is 85% illuminated (waning gibbous) and rises at 6:32 pm. Major solunar periods run from 1:30 am to 3:30 am and from 2:02 pm to 4:02 pm. The next spring tides arrive from November 9 to 11. The sea is smooth, with 1.1 ft waves. There's a light air from the south-southwest (3 mph). Overcast, 54 °F.
Fishing in St. Helens today
Best time to fish
Solunar activity today: medium- Low tide at 6:01 am
- Sunrise at 6:51 am
- Rising pressure (+0.09 inHg in 24 h), light cross-shore wind (5 mph) and calm sea (1.0 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 89 (average tides)
- A major period lines up with sunset
Your day at a glance
The best window, 6:20 am to 7:00 am, combines the 6:01 am low tide and sunrise, though with rising pressure. Also good from 6:00 pm to 7:00 pm, with the 6:24 pm low tide, moonrise and a light onshore breeze. Also good from 12:20 pm to 2:20 pm, with the 1:18 pm high tide, a major period and a light onshore breeze.
Species with the most records nearby: small-spotted catshark, thornback ray, black seabream and Atlantic horse mackerel. October is one of the months when these are seen most: small-spotted catshark and thornback ray. What you can catch
Beach day in St. Helens
Is it a beach day?
- Sun and clouds
- Onshore breeze (10 mph)
- Calm for swimming: 1.0 ft waves
- Feels like 58 °F: chilly for the beach
- Water at 59 °F (cold)
- High tide at 1:18 pm
Today, hour by hour
- Swimming Calm · 1.0 ft
1.0 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 59 °F
Cold: ease in slowly.
- Sun & sunscreen UV 1 · SPF 15
Max UV 1 (low): SPF 15 sunscreen.
- Wind 10 mph
Onshore breeze (10 mph).
- Tide & sand 6:01 am
Low tide at 6:01 am and 6:24 pm: that's when there's the most sand. High tide at 1:00 am and 1:18 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 St. Helens
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Bembridge Point Beach 0.8 mi · E
- Restrooms
- Parking
- Seagrove Beach 1.4 mi · N
Excellent water quality 2025 season, Environment Agency
- Whitecliff Bay 1.9 mi · SE
- Parking
Excellent water quality 2025 season, Environment Agency
- Bembridge Beach 2.0 mi · E
- Parking
Good water quality 2025 season, Environment Agency
- Yaverland Beach 2.6 mi · S
- Restrooms
- Parking
Excellent water quality 2025 season, Environment Agency
- Ryde Beach 2.9 mi · NW
- Lifeguard
- Restrooms
- Parking
Good water quality 2025 season, Environment Agency
- Sandown Beach 3.4 mi · SW
- Restrooms
- Parking
Good water quality 2025 season, Environment Agency
- Welcome Beach 4.7 mi · SW
- Restrooms
- Parking
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.
Webcams near St. Helens
Webcams provided by windy.com — add a webcam
Tides in St. Helens
Today's high and low tides
- ▲ High tide 1:00 am 13.0 ft · coef. 89
- ▼ Next low tide 6:01 am 1.9 ft
- ▲ High tide 1:18 pm 13.0 ft · coef. 87
- ▼ Low tide 6:24 pm 1.6 ft
↓ Falling The tide is falling. 2 h 9 min to low tide at 6:01 am.
Tide coefficient 89 for the 1:00 am high tide and 87 for the 1:18 pm high tide. Average coefficient. The water rises and falls 11.4 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 (13.6 ft) and the lowest, on March 21 (0.6 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 9 to 12 (coefficient 92, 11.7 ft range). The smallest, from October 19 to 20 (coefficient 35, 3.9 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 6:51 am · 4:45 pm | High tide 1:00 am · 13.0 ft | Low tide 6:01 am · 1.9 ft | High tide 1:18 pm · 13.0 ft | Low tide 6:24 pm · 1.6 ft | Coef. 89 | 85% | Major periods 1:30 am · 2:02 pm | Medium |
| Fri 30 | 6:52 am · 4:43 pm | High tide 1:52 am · 12.7 ft | Low tide 6:45 am · 2.5 ft | High tide 2:08 pm · 12.5 ft | Low tide 7:10 pm · 2.1 ft | Coef. 83 | 76% | Major periods 2:35 am · 3:06 pm | Medium |
| Sat 31 | 6:54 am · 4:41 pm | High tide 2:47 am · 12.3 ft | Low tide 7:34 am · 3.2 ft | High tide 3:04 pm · 11.9 ft | Low tide 8:03 pm · 2.9 ft | Coef. 75 | 65% | Major periods 3:38 am · 4:08 pm | Medium |
| Sun 1 | 6:56 am · 4:40 pm | High tide 3:49 am · 11.9 ft | Low tide 8:32 am · 4.1 ft | High tide 4:10 pm · 11.3 ft | Low tide 9:10 pm · 3.7 ft | Coef. 64 | Last quarter | Major periods 4:36 am · 5:04 pm | Medium |
| Mon 2 | 6:57 am · 4:38 pm | High tide 4:57 am · 11.5 ft | Low tide 9:55 am · 4.9 ft | High tide 5:23 pm · 10.9 ft | Low tide 10:46 pm · 4.2 ft | Coef. 56 | 43% | Major periods 5:30 am · 5:55 pm | Medium |
| Tue 3 | 6:59 am · 4:36 pm | High tide 6:08 am · 11.4 ft | Low tide 11:46 am · 4.9 ft | High tide 6:37 pm · 10.9 ft | — | Coef. 54 | 32% | Major periods 6:20 am · 6:43 pm | Medium |
| Wed 4 | 7:01 am · 4:34 pm | Low tide 12:14 am · 4.0 ft | High tide 7:17 am · 11.7 ft | Low tide 1:01 pm · 4.4 ft | High tide 7:45 pm · 11.2 ft | Coef. 62 | 23% | Major periods 7:06 am · 7:28 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 Sandown Pier station (TICON-4), 3.6 mi from St. Helens. Times and heights are its predictions.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data
The sea at St. Helens
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.6 ft
- Significant1.1 ft
- Highest expectedHighest2.3 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.3 ft. Before heading out, expect waves of up to 2.3 ft.
Wind on the coast and offshore
Cross-onshore wind. The coast faces southeast and the wind comes in from the sea at an angle: a bit more surf at the shore and drift along the coast, toward land.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Wednesday 4: 2.8 ft with a period of 4 s, from the east (slight).
Water temperature
Water temperature →Water temperature changes how fish behave: in very cold or very warm water they feed less. The water cools over the next few days: about 56.6 °F by Wednesday 4.
Water warmer than normal for late October (+1.3 °F).
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 3:52 am (local time).
Nearest buoy
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 St. Helens today
Surf today
Flat- Barely any waves (0.8 ft sets): flat
- Light onshore wind (6 mph): a bit of chop
- Rising tide (high tide at 1:18 pm)
It’s flat today: almost no waves reach this coast.
- Light: First light 6:16 am · sunrise 6:51 am · sunset 4:45 pm · last light 5:19 pm
- Tide: high 1:00 am (13.0 ft), low 6:01 am (1.9 ft), high 1:18 pm (13.0 ft) and low 6:24 pm (1.6 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 58.8 °F: a 4/3 fullsuit (booties if you run cold).
- Energy: 3 kJ · Low power
Today’s surf at a glance
The best window is 8:00 am to 12:00 pm, 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 St. Helens today
Diving and snorkeling today
Likely visibility: good- Some tidal current
- 0.7 ft swell at 5 s from the southwest: barely any surge
- Light onshore wind (5 mph)
- 0.7 mph current toward the west (model)
- Sun high: more light underwater
- Slack water today: high tide 1:00 am (12:30–1:30 am), low tide 6:01 am (5:46–6:16 am), high tide 1:18 pm (12:50–1:40 pm) and low tide 6:24 pm (6:09–6:40 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 58.8 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: doable, with some waves or wind.
- Night dive: dark from 5:19 pm. Waning gibbous (85%), rising at 6:32 pm: a bright night.
Your diving day at a glance
The best window, 11:50 am to 12:30 pm, combines little swell, light wind and the sun high, though with tidal current and current.
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
- Harry Sharman 2.3 mi
- Empress Queen 2.3 mi
- HMS P12 (stern Section). 2.9 mi
- France Aimee (part Of) 3.1 mi
- HMS Velox 3.3 mi
- Hm Lct 427 (after Part) 3.3 mi
- HMS Hazard 3.3 mi
- Wreck 2.0 mi
- North Solent Nature Reserve 12 mi
- RS Divers 6.5 mi
- Triton Scuba 7.2 mi
- Solent Divers and Safety Air Services 7.5 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 St. Helens
Now in St. Helens
- Low / high
- 54 / 59 °F
- Rain
- 0.00 in · 2%
- Clouds
- 100%
- Humidity
- 92%
- Dew pointDew point
- 52 °F
- Visibility
- 13 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 38
- 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 (−0.01 inHg in 3 hours). Over the next 48 hours: +0.08 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 | Overcast | Overcast | Overcast | Partly cloudy | Partly cloudy | Partly cloudy | Overcast | Overcast |
| Temperature | 55° | 54° | 56° | 56° | 59° | 58° | 58° | 57° |
| Wind (mph) | 5 SW | 4 SW | 2 NE | 7 ESE | 5 SSE | 10 E | 12 E | 11 E |
| Gusts | 5 | 5 | 2 | 9 | 8 | 12 | 14 | 13 |
| Waves | 1.4 ft | 1.2 ft | 1.0 ft | 0.9 ft | 0.9 ft | 0.9 ft | 1.0 ft | 1.4 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 |
- 3:00 am 54° 4 SW 1.2 ft
- 6:00 am 56° 2 NE 1.0 ft
- 9:00 am 56° 7 ESE 0.9 ft
- 12:00 pm 59° 5 SSE 0.9 ft
- 3:00 pm 58° 10 E 0.9 ft
- 6:00 pm 58° 12 E 1.0 ft
- 9:00 pm 57° 11 E 1.4 ft
- 12:00 am 59° 16 SE 1.8 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 54 / 59 °F | 15 mph ESE | 1.7 ft | 1:00 am · 1:18 pm | |
| Fri 30 | 54 / 59 °F | 18 mph E | 2.4 ft | 1:52 am · 2:08 pm | |
| Sat 31 | 51 / 56 °F | 15 mph ENE | 2.4 ft | 2:47 am · 3:04 pm | |
| Sun 1 | 50 / 53 °F | 8 mph NNE | 1.7 ft | 3:49 am · 4:10 pm | |
| Mon 2 | 49 / 54 °F | 14 mph NNE | 2.4 ft | 4:57 am · 5:23 pm | |
| Tue 3 | 48 / 55 °F | 16 mph NNE | 2.5 ft | 6:08 am · 6:37 pm | |
| Wed 4 | 49 / 53 °F | 12 mph NE | 2.8 ft | 7:17 am · 7:45 pm | |
| Thu 5 | 46 / 52 °F | 14 mph ENE | 3.5 ft | 8:21 am · 8:46 pm | |
| Fri 6 | 49 / 53 °F | 17 mph ENE | 3.7 ft | 9:16 am · 9:38 pm | |
| Sat 7 | 49 / 56 °F | 13 mph E | 2.7 ft | 10:03 am · 10:24 pm | |
| Sun 8 | 53 / 57 °F | 10 mph S | 1.6 ft | 10:45 am · 11:06 pm | |
| Mon 9 | 56 / 58 °F | 10 mph SSE | 1.9 ft | 11:21 am · 11:44 pm | |
| Tue 10 | 56 / 60 °F | 16 mph SW | 2.6 ft | 11:54 am | |
| Wed 11 | 55 / 57 °F | 16 mph W | 2.3 ft | 12:20 am · 12:23 pm |
- Fri 30 Partly cloudy 54° / 59° 2.4 ft
- Sat 31 Overcast 51° / 56° 2.4 ft
- Sun 1 Overcast 50° / 53° 1.7 ft
- Mon 2 Overcast 49° / 54° 2.4 ft
- Tue 3 Overcast 48° / 55° 2.5 ft
- Wed 4 Light drizzle 49° / 53° 2.8 ft
- Thu 5 Mainly clear 46° / 52° 3.5 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.
- Normal Today, warmer than normal for late October (+2.8 °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 3:52 am (local time).
The sun in St. Helens
Sunrise and sunset
- First light 5:38 am
- Full dark 5:58 pm
- Civil dawn 6:16 am
- Civil dusk 5:19 pm
- Solar noon 11:48 am (26° high)
- Daylight 9 h 54 min (−4 min)
- Evening golden hour 3:57 pm
- Full dark 5:58 pm
Golden hour and the day-night map
Today the sun is 92,335,475 mi away and looks 32′ 11″ across.
The moon in St. Helens
Moon phase and position
Today the moon is 226,641 mi away and looks 32′ 45″ across.
Solunar periods
Today's activity: medium- 1:30–3:30 am Major · the moon passes overhead · high activity
- 2:02–4:02 pm Major · the moon passes underfoot · high activity
- 11:02 am–12:02 pm Minor · moonset · medium activity
- 6:02–7:02 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 3 days
- New moon Mon, Nov 9 · 7:03 amNov 9 in 11 days
- First quarter Tue, Nov 17 · 11:48 amNov 17 in 19 days
- Full moon Tue, Nov 24 · 2:54 pmNov 24 in 26 days
Next perigee (the moon at its closest to Earth): November 25, 223,281 mi away.
Where to fish in St. Helens
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Ryde Pier 3.5 mi
- Sandown Pier 3.6 mi
- South Parade Pier 5.8 mi
- Bembridge Angling Club 0.3 mi
- Boat ramp 0.4 mi
- Boat ramp 0.6 mi
- Boat ramp 0.6 mi
- Joint Services Adventurous Sail Training Centre (JSASTC) 6.4 mi
- Bembridge Harbour 0.6 mi
- Wight Angling 3.0 mi
- Bait & Tackle 3.3 mi
- fuel station 7.8 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
Gentle slopeThe bottom slopes gently: 16 ft deep 0.4 mi from shore and 33 ft at 0.6 mi.
From the shoreline (1.8 mi from St. Helens) out to sea, heading southeast.
How far from shore
- 16 ft deep0.4 mi
- 33 ft deep0.6 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 0.4 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. 33 ft deep 0.6 mi from shore; 66 ft is far out (beyond 3.1 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
St Helens Fort 1.3 mi northeast
- Light
- 3 white flashes every 10 s · Fl(3) W 10s
- Range
- 8 nautical miles (9.2 mi)
- Light height
- 52 ft above sea level
- Built
- 1867
Other lighthouses nearby: Southsea Castle lighthouse (5.7 mi north).
Data from Wikidata. For reference only: not for navigation. Wikipedia · Wikidata · Sources and licenses
Tides near St. HelensTides nearby
- Bembridge1.5 mi
- Seaview1.6 mi
- Brading1.9 mi
- Ryde3.2 mi
- Sandown3.8 mi
- Shanklin5.7 mi
- Wootton5.8 mi
- Southsea6.1 mi
- Gosport6.8 mi
- Portsmouth7.1 mi
St. Helens at a glance
- Town or city of about 1,213 people. Coordinates: 50.697° N, 1.112° W.
- It is 9.3 mi southeast of Cowes, the main place in Wight. The sun rises 1 min earlier and sets 1 min earlier than in Cowes.
- The nearest tide station, Sandown Pier, is 3.6 mi to the southwest.
- Its coast faces southeast.
Questions about St. HelensQuestions
What time is high tide today in St. Helens?
Today in St. Helens there are high tides at 1:00 am (13.0 ft) and 1:18 pm (13.0 ft) and low tides at 6:01 am and 6:24 pm. Tide coefficient 89.
What time is sunset today in St. Helens?
At 4:45 pm. There is light until the end of civil twilight, at 5:19 pm.
What time is sunrise tomorrow in St. Helens?
At 6:52 am. First light comes at 5:39 am.
What phase is the moon today?
Waning gibbous, 85% illuminated. New moon on Mon, Nov 9 · 7:03 am.
When are the next spring tides?
From November 9 to 11.
What are today's solunar periods?
Major 1:30–3:30 am, Minor 11:02 am–12:02 pm, Major 2:02–4:02 pm, Minor 6:02–7:02 pm. Today's activity is medium.
What's the weather like today in St. Helens?
Overcast, from 54 °F to 59 °F, with a light air from the south-southwest (3 mph) and a 2% chance of rain.
How is the sea today in St. Helens?
Smooth (Douglas 2): 1.1 ft waves with a period of 6.6 s from the southwest. The water is 59.0 °F.
When is the best time to visit St. Helens?
The best time to visit St. Helens is from July to August: highs of 71 °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: Sandown Pier station, with constants from TICON-4 (Hart-Davis, Dettmering and Seitz, 2025, SEANOE), licensed CC BY 4.0, via Slackwater database (changes). Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).