Wittdün tides today
- Tide now 7.9 ft ↑ rising · high 2:45 am (11.2 ft)
- Best time tomorrow 2:20–4:10 pm good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 4.5 ft · 54 °F moderate · 5.5 s from the west
- Wind · air 7 mph · 55 °F from the W, gusts 15 · overcast
- Sun 7:21 am–4:59 pm 9 h 38 min of daylight
- Moon 93% · 5:27 pm waning gibbous · rises at 5:27 pm
- Diving tomorrow 1:20–2:30 pm good day · 7/10
Today in Wittdün there are high tides at 2:11 am (11.3 ft) and 2:31 pm (11.4 ft) and low tides at 8:46 am and 9:09 pm. Tide coefficient 79. Right now the tide is rising toward the high tide at 2:45 am. The sun rises at 7:21 am and sets at 4:59 pm: 9 h 38 min of daylight. The moon is 93% illuminated (waning gibbous) and rises at 5:27 pm. Major solunar periods run from 12:47 am to 2:47 am and from 1:18 pm to 3:18 pm. The next spring tides arrive from October 26 to 28. The sea is moderate, with 4.5 ft waves. There's a light breeze from the west (7 mph). Overcast, 55 °F.
Fishing in Wittdün today
Best time to fish
Solunar activity today: high- High tide at 2:11 am, coefficient 79
- Major period 12:47–2:47 am
- Rising pressure (+0.21 inHg in 24 h), light onshore wind (8 mph) and some swell (3.9 ft waves) to stir the water
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 79 (average tides)
- A minor period lines up with sunset
Your day at a glance
The best window, 1:10 am to 2:50 am, combines the 2:11 am high tide, a major period, a light onshore breeze and some swell, though with rising pressure. Also worth a try from 1:30 pm to 3:20 pm, with the 2:31 pm high tide, a major period and some swell, though with rising pressure and moderate wind. Also worth a try from 7:50 am to 9:50 am, with the 8:46 am low tide, sunrise, a light onshore breeze and some swell, though with rising pressure.
Species with the most records nearby: European plaice, whiting, Atlantic cod and European flounder. October is one of the months when these are seen most: European flounder and common sole. What you can catch
Beach day in Wittdün
Is it a beach day?
- Mostly sunny
- Low tide at 8:46 am: more sand
- Feels like 50 °F: chilly for the beach
- Moderate onshore wind (15 mph): choppy water
- Swim with care: 4.4 ft waves every 5 s
- Water at 54 °F (very cold)
Today, hour by hour
- Swimming Use care · 4.4 ft
4.4 ft waves every 5 s: swim with care and stay where you can stand. 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 15 mph
Moderate onshore wind (15 mph).
- Tide & sand 8:46 am
Low tide at 8:46 am and 9:09 pm: that's when there's the most sand. High tide at 2:11 am and 2:31 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 Wittdün
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Kniepsand 2.8 mi · NW
- Lifeguard
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, EEA
- FKK-Strand Goting 5.1 mi · NE
- Restrooms
- Showers
- Parking
- Clothing-optional area
Excellent water quality 2025 season, EEA
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). Bathing water quality: European Environment Agency (EEA), with data from the authorities of Germany.
Webcams near Wittdün
Webcams provided by windy.com — add a webcam
Tides in Wittdün
Today's high and low tides
- ▲ High tide 2:11 am 11.3 ft · coef. 79
- ▼ Low tide 8:46 am 2.1 ft
- ▲ High tide 2:31 pm 11.4 ft · coef. 78
- ▼ Low tide 9:09 pm 2.3 ft
↑ Rising The tide is rising. 2 h 56 min to high tide at 2:45 am.
Tide coefficient 79 for the 2:11 am high tide and 78 for the 2:31 pm high tide. Average coefficient. The water rises and falls 9.3 ft between the highest high and the lowest low: an average 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 October 10 (12.2 ft) and the lowest, on April 18 (0.7 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 84, 10.7 ft range). The smallest, from October 20 to 21 (coefficient 48, 5.9 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 | 7:21 am · 4:59 pm | High tide 2:11 am · 11.3 ft | Low tide 8:46 am · 2.1 ft | High tide 2:31 pm · 11.4 ft | Low tide 9:09 pm · 2.3 ft | Coef. 79 | 93% | Major periods 12:47 am · 1:18 pm | High |
| Thu 29 | 7:23 am · 4:57 pm | High tide 2:45 am · 11.2 ft | Low tide 9:29 am · 2.2 ft | High tide 3:10 pm · 11.1 ft | Low tide 9:50 pm · 2.6 ft | Coef. 77 | 85% | Major periods 1:50 am · 2:23 pm | High |
| Fri 30 | 7:25 am · 4:55 pm | High tide 3:21 am · 11.2 ft | Low tide 10:13 am · 2.2 ft | High tide 3:50 pm · 10.9 ft | Low tide 10:31 pm · 2.9 ft | Coef. 74 | 76% | Major periods 2:55 am · 3:27 pm | Medium |
| Sat 31 | 7:27 am · 4:53 pm | High tide 4:02 am · 11.2 ft | Low tide 10:59 am · 2.4 ft | High tide 4:38 pm · 10.5 ft | Low tide 11:15 pm · 3.3 ft | Coef. 71 | 66% | Major periods 3:58 am · 4:28 pm | Medium |
| Sun 1 | 7:29 am · 4:50 pm | High tide 4:53 am · 11.1 ft | Low tide 11:48 am · 2.7 ft | High tide 5:33 pm · 10.1 ft | — | Coef. 66 | Last quarter | Major periods 4:57 am · 5:24 pm | Low |
| Mon 2 | 7:31 am · 4:48 pm | Low tide 12:05 am · 3.7 ft | High tide 5:54 am · 11.0 ft | Low tide 12:46 pm · 3.0 ft | High tide 6:38 pm · 9.8 ft | Coef. 61 | 43% | Major periods 5:51 am · 6:16 pm | Medium |
| Tue 3 | 7:33 am · 4:46 pm | Low tide 1:03 am · 4.0 ft | High tide 7:04 am · 10.8 ft | Low tide 1:56 pm · 3.2 ft | High tide 7:56 pm · 9.6 ft | Coef. 57 | 33% | Major periods 6:41 am · 7:04 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 Wittdün station (TICON-4), 0.5 mi from Wittdün. 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 Wittdün
Sea stateSea state: moderate
The waves you may find
- Most commonMost common2.2 ft
- Significant4.5 ft
- Highest expectedHighest9.2 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 9.2 ft. Before heading out, expect waves of up to 9.2 ft.
Wind on the coast and offshore
Cross-onshore wind. The coast faces southwest 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 stay much the same all week. The biggest waves arrive on Wednesday 28: 4.7 ft with a period of 5 s, from the west (moderate).
Water temperature
Water temperature →The satellite measured 2.9 °F more yesterday than the model gives now: the water is probably warmer than the forecast says.
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 warmer than normal for late October (+1.7 °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 11:49 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from State Agency for Coastal Protection, National Park and Marine Protection Schleswig-Holstein LKN.SH, via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Surf in Wittdün today
Surf today
Poor- 2.4–3.6 ft surf at the shore, a fun size for most surfers
- 3.3 ft swell at 5 s from the west, short: weak, messy waves
- Light onshore wind (8 mph): a bit of chop
- Falling tide (low tide at 8:46 am)
- Light: First light 6:43 am · sunrise 7:21 am · sunset 4:59 pm · last light 5:36 pm
- Tide: high 2:11 am (11.3 ft), low 8:46 am (2.1 ft), high 2:31 pm (11.4 ft) and low 9:09 pm (2.3 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 54.0 °F: a 5/4 fullsuit with booties (and a hood if it’s windy).
- Energy: 51 kJ · Low power
Today’s surf at a glance
The best window, 7:00 am to 10:00 am, has a good size, though with a short-period swell. 12:00 pm to 1:00 pm can also work, with a good size, though with a short-period swell, wind swell and onshore wind.
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 Wittdün today
Diving and snorkeling today
Likely visibility: good- Slack water around low tide (8:46 am): little current from 8:30 am to 9:01 am
- 3.2 ft swell at 5 s from the west: some surge on the bottom
- Light onshore wind (10 mph)
- 1.7 mph current toward the east-southeast, strong (model)
- Daylight
- Slack water today: high tide 2:11 am (1:30–2:50 am), low tide 8:46 am (8:30–9:01 am), high tide 2:31 pm (1:50–3:10 pm) and low tide 9:09 pm (8:50–9:24 pm)
- Likely visibility: good. Swell (up to 3.7 ft at 5 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 54.0 °F: a 7 mm semi-dry suit, with hood, gloves and booties.
- Snorkeling: better not, with these waves, wind or current.
- Night dive: dark from 5:36 pm. Waning gibbous (93%), rising at 5:27 pm: a bright night.
Your diving day at a glance
The best window, 8:30 am to 9:30 am, combines slack water at low tide and light wind, though with current. Also worth a look from 12:50 pm to 2:30 pm, with slack water at high tide and the sun high, though with waves, moderate wind 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
- Colin Archer 1.9 mi
- Fri 16 2.5 mi
- Albis 5.7 mi
- Ottensen of Altona 6.6 mi
- George H. Hastie 8.2 mi
- Pella 9.2 mi
- Wreck 1.8 mi
- Wreck 4.9 mi
- Wreck 6.6 mi
- Wreck 7.8 mi
- Hörnum-Odde/Sylt 9.2 mi
- Nationalpark Schleswig-Holsteinisches Wattenmeer 11 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 Wittdün
Now in Wittdün
- Low / high
- 54 / 56 °F
- Rain
- 0.08 in · 84%
- Clouds
- 100%
- Humidity
- 91%
- Dew pointDew point
- 52 °F
- Visibility
- 12 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 26
- 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: +0.27 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 | Mainly clear | Partly cloudy | Clear sky | Mainly clear | Partly cloudy | Overcast | Light rain |
| Temperature | 55° | 55° | 54° | 55° | 56° | 55° | 55° | 54° |
| Wind (mph) | 12 W | 8 WSW | 9 W | 10 WSW | 13 WSW | 15 WSW | 13 SW | 19 SW |
| Gusts | 17 | 12 | 13 | 15 | 20 | 21 | 20 | 27 |
| Waves | 4.1 ft | 3.9 ft | 3.7 ft | 3.7 ft | 4.1 ft | 4.4 ft | 4.5 ft | 4.7 ft |
| Rain | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.02 in |
- 12:00 am 55° 6 W 4.5 ft
- 3:00 am 54° 6 W 4.0 ft
- 6:00 am 53° 5 WNW 3.5 ft
- 9:00 am 53° 3 W 3.0 ft
- 12:00 pm 56° 4 WSW 2.7 ft
- 3:00 pm 56° 3 W 2.4 ft
- 6:00 pm 53° 3 SW 2.2 ft
- 9:00 pm 53° 3 SW 2.0 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 54 / 56 °F | 19 mph WSW | 4.7 ft | 2:11 am · 2:31 pm | |
| Thu 29 | 53 / 56 °F | 7 mph W | 4.5 ft | 2:45 am · 3:10 pm | |
| Fri 30 | 52 / 56 °F | 4 mph WNW | 1.8 ft | 3:21 am · 3:50 pm | |
| Sat 31 | 52 / 54 °F | 2 mph N | 1.2 ft | 4:02 am · 4:38 pm | |
| Sun 1 | 50 / 53 °F | 11 mph S | 1.0 ft | 4:53 am · 5:33 pm | |
| Mon 2 | 47 / 53 °F | 16 mph N | 3.5 ft | 5:54 am · 6:38 pm | |
| Tue 3 | 41 / 51 °F | 10 mph E | 2.7 ft | 7:04 am · 7:56 pm | |
| Wed 4 | 44 / 53 °F | 13 mph NW | 2.0 ft | 8:25 am · 9:30 pm | |
| Thu 5 | 48 / 53 °F | 14 mph NNW | 2.2 ft | 9:50 am · 10:46 pm | |
| Fri 6 | 46 / 49 °F | 4 mph SE | 1.8 ft | 10:59 am · 11:39 pm | |
| Sat 7 | 45 / 49 °F | 9 mph S | 1.1 ft | 11:53 am | |
| Sun 8 | 45 / 51 °F | 8 mph SW | 1.1 ft | 12:23 am · 12:38 pm | |
| Mon 9 | 46 / 49 °F | 13 mph SE | 1.9 ft | 1:00 am · 1:17 pm | |
| Tue 10 | 48 / 52 °F | 14 mph SE | 1.9 ft | 1:34 am · 1:52 pm |
- Thu 29 Overcast 53° / 56° 4.5 ft
- Fri 30 Fog 52° / 56° 1.8 ft
- Sat 31 Overcast 52° / 54° 1.2 ft
- Sun 1 Light rain 50° / 53° 1.0 ft
- Mon 2 Light rain 47° / 53° 3.5 ft
- Tue 3 Mainly clear 41° / 51° 2.7 ft
- Wed 4 Overcast 44° / 53° 2.0 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 (+3.9 °F; normal high: 52 °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 11:49 pm (local time).
The sun in Wittdün
Sunrise and sunset
- First light 6:01 am
- Full dark 6:19 pm
- Civil dawn 6:43 am
- Civil dusk 5:36 pm
- Solar noon 12:10 pm (22° high)
- Daylight 9 h 38 min (−4 min)
- Evening golden hour 4:06 pm
- Full dark 6:19 pm
Golden hour and the day-night map
Today the sun is 92,360,431 mi away and looks 32′ 11″ across.
The moon in Wittdün
Moon phase and position
Today the moon is 226,461 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 12:47–2:47 am Major · the moon passes overhead · high activity
- 1:18–3:18 pm Major · the moon passes underfoot · high activity
- 10:33–11:33 am Minor · moonset · medium activity
- 4:57–5:57 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 · 9:29 pmNov 1 in 4 days
- New moon Mon, Nov 9 · 8:03 amNov 9 in 12 days
- First quarter Tue, Nov 17 · 12:48 pmNov 17 in 20 days
- Full moon Tue, Nov 24 · 3:54 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 Wittdün
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Seglerbrücke 8.3 mi
- Jetty 5.9 mi
- Jetty 5.9 mi
- Jetty 6.2 mi
- Jetty 6.3 mi
- Jetty 6.4 mi
- Jetty 6.5 mi
- Jetty 6.7 mi
- Boat ramp 6.4 mi
- Boat ramp 8.8 mi
- Marina Wittdün - AYC - Amrumer Yachtclub 0.4 mi
- Seezeichenhafen 0.4 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 10 ft deep.
From the shoreline (1.4 mi from Wittdün) out to sea, heading southwest.
How far from shore
- 16 ft deep1.5 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 1.5 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.
Nearest lighthouse
Wittdün lighthouse 0.1 mi southeast
- Built
- 1977
Other lighthouses nearby: Amrum Lighthouse (1.4 mi west), Wriakhörn Lighthouse (1.5 mi west).
Data from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near WittdünTides nearby
- Borgsum5.8 mi
- Nieblum6.1 mi
- Utersum6.1 mi
- Oldsum7.5 mi
- Wrixum8.1 mi
- Langeneß8.2 mi
- Wyk auf Föhr8.4 mi
- Hörnum9.9 mi
- Pellworm13 mi
- Gröde13 mi
Wittdün at a glance
- Town or city of about 650 people. Coordinates: 54.627° N, 8.389° E.
- It is 73 mi west of Kiel, the main place in Schleswig-Holstein. The sun rises 8 min later and sets 6 min later than in Kiel.
- The nearest tide station, Wittdün, is 0.5 mi to the north.
- Its coast faces southwest.
- Beaches and harbors nearby: Badestrand (0.2 mi), Amrum Hafen (0.6 mi), Kniepsand (2.6 mi).
Questions about WittdünQuestions
What time is high tide today in Wittdün?
Today in Wittdün there are high tides at 2:11 am (11.3 ft) and 2:31 pm (11.4 ft) and low tides at 8:46 am and 9:09 pm. Tide coefficient 79.
What time is sunset today in Wittdün?
At 4:59 pm. There is light until the end of civil twilight, at 5:36 pm.
What time is sunrise tomorrow in Wittdün?
At 7:23 am. First light comes at 6:03 am.
What phase is the moon today?
Waning gibbous, 93% illuminated. New moon on Mon, Nov 9 · 8:03 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 12:47–2:47 am, Minor 10:33–11:33 am, Major 1:18–3:18 pm, Minor 4:57–5:57 pm. Today's activity is high.
What's the weather like today in Wittdün?
Light rain, from 54 °F to 56 °F, with a light breeze from the west (7 mph) and a 84% chance of rain.
How is the sea today in Wittdün?
Moderate (Douglas 4): 4.5 ft waves with a period of 5.5 s from the west. The water is 54.0 °F.
When is the best time to visit Wittdün?
The best time to visit Wittdün is from July to August: highs of 70 °F, about 12 rainy days a month and 7 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: Wittdün 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).