Merville-Franceville-Plage tides today
- Tide now 7.9 ft ↑ rising · high 11:33 am (25.8 ft)
- Best time to fish 11:50 am–12:30 pm average day · 6/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 0.4 ft · 57 °F smooth · 3.7 s from the northwest
- Wind · air 6 mph · 44 °F from the SSE, gusts 9 · fog
- Sun 7:44 am–5:45 pm 10 h 1 min of daylight
- Moon 85% · 7:38 pm waning gibbous · rises at 7:38 pm
- Best time to dive 11:10 am–1:40 pm great day · 10/10
Today in Merville-Franceville-Plage there are high tides at 11:33 am (25.8 ft) and 11:57 pm (25.0 ft) and low tides at 6:58 am and 7:25 pm. Tide coefficient 88. Right now the tide is rising toward the high tide at 11:33 am. The sun rises at 7:44 am and sets at 5:45 pm: 10 h 1 min of daylight. The moon is 85% illuminated (waning gibbous) and rises at 7:38 pm. Major solunar periods run from 2:26 am to 4:26 am and from 2:58 pm to 4:58 pm. The next spring tides arrive from November 9 to 11. The sea is smooth, with 0.4 ft waves. There's a light breeze from the south-southeast (6 mph). Fog, 44 °F.
Fishing in Merville-Franceville-Plage today
Best time to fish
Solunar activity today: medium- Low tide at 6:58 am
- Sunrise at 7:44 am
- Steady pressure (30.39 inHg), light offshore wind (7 mph) and calm sea (0.5 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 88 (average tides)
Your day at a glance
The best window, 7:10 am to 8:00 am, combines the 6:58 am low tide and sunrise. Also good from 11:50 am to 12:30 pm, with the 11:33 am high tide and moonset. Also good from 7:10 pm to 8:10 pm, with the 7:25 pm low tide and moonrise.
Species with the most records nearby: European plaice, Atlantic horse mackerel, whiting and common sole. What you can catch
Beach day in Merville-Franceville-Plage
Is it a beach day?
- Calm for swimming: 0.5 ft waves
- Fog
- Feels like 54 °F: chilly for the beach
- Light offshore wind (9 mph): it blows floats and inflatables out to sea
- Water at 58 °F (very cold)
- High tide at 11:33 am
Today, hour by hour
- Swimming Calm · 0.5 ft
0.5 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 58 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 2 · SPF 15
Max UV 2 (low): SPF 15 sunscreen.
- Wind 9 mph
Offshore breeze (9 mph). Watch floats and inflatables: offshore wind carries them out to sea.
- Tide & sand 7:25 pm
Low tide at 6:58 am and 7:25 pm: that's when there's the most sand. High tide at 11:33 am and 11:57 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 Merville-Franceville-Plage
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Plage naturiste de Merville 1.6 mi · NW
- Clothing-optional area
- Plage de la Redoute 1.7 mi · NW
- Parking
- Nudity allowed
- Plage de Houlgate 5.8 mi · E
- Lifeguard
- Restrooms
- Showers
- Parking
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 French Ministry of Health (baignades.sante.gouv.fr).
Webcams near Merville-Franceville-Plage
Webcams provided by windy.com — add a webcam
Tides in Merville-Franceville-Plage
Today's high and low tides
- ▼ Low tide 6:58 am 4.2 ft
- ▲ Next high tide 11:33 am 25.8 ft · coef. 88
- ▼ Low tide 7:25 pm 4.0 ft
- ▲ High tide 11:57 pm 25.0 ft · coef. 84
↑ Rising The tide is rising. 3 h 7 min to high tide at 11:33 am.
Tide coefficient 88 for the 11:33 am high tide and 84 for the 11:57 pm high tide. Average coefficient. The water rises and falls 21.8 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 March 21 (26.4 ft) and the lowest, on August 14 (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 94, 23.1 ft range). The smallest, from October 19 to 20 (coefficient 32, 7.5 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 | 7:44 am · 5:45 pm | Low tide 6:58 am · 4.2 ft | High tide 11:33 am · 25.8 ft | Low tide 7:25 pm · 4.0 ft | High tide 11:57 pm · 25.0 ft | Coef. 88 | 85% | Major periods 2:26 am · 2:58 pm | Medium |
| Fri 30 | 7:45 am · 5:43 pm | Low tide 7:44 am · 5.1 ft | High tide 12:16 pm · 24.8 ft | Low tide 8:12 pm · 4.9 ft | — | Coef. 80 | 76% | Major periods 3:31 am · 4:03 pm | Medium |
| Sat 31 | 7:47 am · 5:41 pm | High tide 12:44 am · 23.6 ft | Low tide 8:35 am · 6.4 ft | High tide 1:04 pm · 23.3 ft | Low tide 9:06 pm · 6.0 ft | Coef. 75 | 66% | Major periods 4:34 am · 5:04 pm | Medium |
| Sun 1 | 7:49 am · 5:40 pm | High tide 1:44 am · 21.9 ft | Low tide 9:31 am · 7.7 ft | High tide 2:11 pm · 21.5 ft | Low tide 10:06 pm · 7.2 ft | Coef. 63 | Last quarter | Major periods 5:33 am · 6:00 pm | Medium |
| Mon 2 | 7:50 am · 5:38 pm | High tide 4:19 am · 20.9 ft | Low tide 10:36 am · 8.7 ft | High tide 4:44 pm · 20.9 ft | Low tide 11:14 pm · 7.8 ft | Coef. 53 | 43% | Major periods 6:26 am · 6:52 pm | Medium |
| Tue 3 | 7:52 am · 5:36 pm | High tide 5:29 am · 20.9 ft | Low tide 11:48 am · 8.9 ft | High tide 5:53 pm · 21.1 ft | — | Coef. 51 | 33% | Major periods 7:16 am · 7:39 pm | Medium |
| Wed 4 | 7:53 am · 5:35 pm | Low tide 12:31 am · 7.6 ft | High tide 6:38 am · 21.5 ft | Low tide 1:07 pm · 8.1 ft | High tide 7:01 pm · 21.8 ft | Coef. 59 | 23% | Major periods 8:02 am · 8:25 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 Ouistreham station (TICON-4), 2.4 mi from Merville-Franceville-Plage. 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 Merville-Franceville-Plage
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.2 ft
- Significant0.4 ft
- Highest expectedHighest0.9 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 0.9 ft. Before heading out, expect waves of up to 0.9 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 build over the next few days. The biggest waves arrive on Monday 2: 4.4 ft with a period of 5 s, from the north-northeast (moderate).
Water temperature
Water temperature →The satellite measured 3.6 °F more 2 days ago 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 cools over the next few days: about 56.6 °F by Wednesday 4.
Water colder than normal for late October (−1.1 °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 8:26 am (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from Cerema, Le Havre Large Seaport, via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Surf in Merville-Franceville-Plage today
Surf today
Flat- Barely any waves (0.5 ft sets): flat
- Light offshore wind (7 mph): it holds up and grooms the waves
- First or last light of the day
- Rising tide (high tide at 11:33 am)
It’s flat today: almost no waves reach this coast.
- Light: First light 7:11 am · sunrise 7:44 am · sunset 5:45 pm · last light 6:18 pm
- Tide: low 6:58 am (4.2 ft), high 11:33 am (25.8 ft), low 7:25 pm (4.0 ft) and high 11:57 pm (25.0 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 57.4 °F: a 4/3 fullsuit (booties if you run cold).
- Energy: 0 kJ · Low power
Today’s surf at a glance
The best window, 7:11 am to 11:00 am, 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 Merville-Franceville-Plage today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (11:33 am): little current from 11:18 am to 12:00 pm
- 0.3 ft swell at 3 s from the northwest: barely any surge
- Light offshore wind (4 mph)
- 0.1 mph current toward the east, weak (model)
- Sun high: more light underwater
- Slack water today: low tide 6:58 am (6:20–7:20 am), high tide 11:33 am (11:18 am–12:00 pm), low tide 7:25 pm (6:50–7:50 pm) and high tide 11:57 pm (11:40 pm–12:30 am)
- Likely visibility: good. The sea has been calm and there's been little rain. Based on the last 24 hours of data.
- Water at 57.4 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 6:18 pm. Waning gibbous (85%), rising at 7:38 pm: a bright night.
Your diving day at a glance
The best window, 11:10 am to 1:40 pm, combines slack water at high tide, little swell, light wind, weak current and the sun high.
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
- Courbet 4.9 mi
- Lcg 1062 5.3 mi
- Wreck 4.1 mi
- Wreck 4.3 mi
- Wreck 4.4 mi
- Wreck 4.5 mi
- Wreck 4.5 mi
- Wreck 4.5 mi
- Wreck 4.6 mi
- Cap Sub 9.2 mi
- Sub'alligators 10 mi
- Abyss Coeur De Nacre Plongee. 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 Merville-Franceville-Plage
Now in Merville-Franceville-Plage
- Low / high
- 41 / 59 °F
- Rain
- 0.00 in · 0%
- Clouds
- 100%
- Humidity
- 90%
- Dew pointDew point
- 41 °F
- Visibility
- 1.4 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 32
- 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: +0.03 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 | Fog | Fog | Fog | Fog | Mainly clear | Mainly clear | Partly cloudy | Mainly clear |
| Temperature | 44° | 44° | 42° | 45° | 56° | 58° | 52° | 46° |
| Wind (mph) | 6 SSE | 8 SSE | 6 SSE | 4 SSE | 4 ESE | 9 ESE | 6 E | 5 ENE |
| Gusts | 6 | 11 | 7 | 9 | 8 | 15 | 14 | 8 |
| Waves | 0.8 ft | 0.7 ft | 0.5 ft | 0.4 ft | 0.3 ft | 0.4 ft | 0.5 ft | 0.6 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 |
- 9:00 am 45° 4 SSE 0.4 ft
- 12:00 pm 56° 4 ESE 0.3 ft
- 3:00 pm 58° 9 ESE 0.4 ft
- 6:00 pm 52° 6 E 0.5 ft
- 9:00 pm 46° 5 ENE 0.6 ft
- 12:00 am 43° 4 E 0.6 ft
- 3:00 am 40° 3 E 0.5 ft
- 6:00 am 38° 4 SE 0.5 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 41 / 59 °F | 9 mph SE | 0.8 ft | 11:33 am · 11:57 pm | |
| Fri 30 | 37 / 57 °F | 9 mph E | 1.2 ft | 12:16 pm | |
| Sat 31 | 37 / 56 °F | 8 mph E | 1.1 ft | 12:44 am · 1:04 pm | |
| Sun 1 | 43 / 53 °F | 9 mph NE | 1.9 ft | 1:44 am · 2:11 pm | |
| Mon 2 | 40 / 59 °F | 14 mph NE | 4.4 ft | 4:19 am · 4:44 pm | |
| Tue 3 | 48 / 54 °F | 16 mph NE | 4.0 ft | 5:29 am · 5:53 pm | |
| Wed 4 | 42 / 51 °F | 11 mph ENE | 3.2 ft | 6:38 am · 7:01 pm | |
| Thu 5 | 39 / 49 °F | 9 mph E | 2.2 ft | 7:47 am · 8:07 pm | |
| Fri 6 | 38 / 49 °F | 9 mph E | 1.7 ft | 8:45 am · 9:02 pm | |
| Sat 7 | 38 / 56 °F | 9 mph SE | 2.8 ft | 9:29 am · 9:45 pm | |
| Sun 8 | 49 / 55 °F | 9 mph SSE | 1.4 ft | 10:04 am · 10:20 pm | |
| Mon 9 | 52 / 57 °F | 12 mph SSE | 1.8 ft | 10:29 am · 10:32 pm | |
| Tue 10 | 57 / 63 °F | 12 mph SSW | 2.6 ft | 10:26 am · 10:33 pm | |
| Wed 11 | 54 / 58 °F | 15 mph SW | 4.1 ft | 10:43 am · 10:57 pm |
- Fri 30 Partly cloudy 37° / 57° 1.2 ft
- Sat 31 Partly cloudy 37° / 56° 1.1 ft
- Sun 1 Fog 43° / 53° 1.9 ft
- Mon 2 Fog 40° / 59° 4.4 ft
- Tue 3 Light drizzle 48° / 54° 4.0 ft
- Wed 4 Clear sky 42° / 51° 3.2 ft
- Thu 5 Clear sky 39° / 49° 2.2 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, normal highs for late October (59 °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 8:26 am (local time).
The sun in Merville-Franceville-Plage
Sunrise and sunset
- First light 6:33 am
- Full dark 6:55 pm
- Civil dawn 7:11 am
- Civil dusk 6:18 pm
- Solar noon 12:44 pm (27° high)
- Daylight 10 h 1 min (−3 min)
- Evening golden hour 4:59 pm
- Full dark 6:55 pm
Golden hour and the day-night map
Today the sun is 92,335,537 mi away and looks 32′ 11″ across.
The moon in Merville-Franceville-Plage
Moon phase and position
Today the moon is 226,618 mi away and looks 32′ 45″ across.
Solunar periods
Today's activity: medium- 2:26–4:26 am Major · the moon passes overhead · high activity
- 2:58–4:58 pm Major · the moon passes underfoot · high activity
- 11:48 am–12:48 pm Minor · moonset · medium activity
- 7:08–8:08 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 3 days
- New moon Mon, Nov 9 · 8:03 amNov 9 in 11 days
- First quarter Tue, Nov 17 · 12:48 pmNov 17 in 19 days
- Full moon Tue, Nov 24 · 3:54 pmNov 24 in 26 days
Next perigee (the moon at its closest to Earth): November 25, 223,281 mi away.
Where to fish in Merville-Franceville-Plage
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Ponton E 2.3 mi
- Ponton F 2.3 mi
- Ponton G 2.3 mi
- Ponton H 2.3 mi
- Ponton B 2.3 mi
- Boat ramp 1.3 mi
- Boat ramp 2.3 mi
- Boat ramp 2.3 mi
- Port de Plaisance 2.4 mi
- Marina 2.4 mi
- Le Poisson Bleu 3.4 mi
- Le Pêcheur du Coin 5.4 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 29 ft deep.
From the shoreline (1.1 mi from Merville-Franceville-Plage) out to sea, heading north.
How far from shore
- 16 ft deep1.7 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 1.7 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
Ouistreham lighthouse 2.4 mi west
- Light
- Light that goes dark once every 4 s; white or red depending on where you see it from · Oc WR 4s
- Range
- 17 nautical miles (20 mi)
- Light height
- 121 ft above sea level
- Tower height
- 125 ft
- Built
- 1905
Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near Merville-Franceville-PlageTides nearby
- Ouistreham2.8 mi
- Cabourg4.0 mi
- Dives-sur-Mer4.3 mi
- Colleville-Montgomery4.7 mi
- Hermanville-sur-Mer5.4 mi
- Houlgate5.5 mi
- Lion-sur-Mer6.0 mi
- Luc-sur-Mer7.7 mi
- Langrune-sur-Mer8.7 mi
- Saint-Aubin-sur-Mer9.4 mi
Merville-Franceville-Plage at a glance
- Town or city of about 1,592 people. Coordinates: 49.272° N, 0.196° W.
- It is 21 mi southwest of Le Havre, the main place in Normandy. The sun rises 1 min later and sets 2 min later than in Le Havre.
- The nearest tide station, Ouistreham, is 2.4 mi to the west.
- Its coast faces north.
- Beaches and harbors nearby: Plage de Cabourg (2.1 mi).
Questions about Merville-Franceville-PlageQuestions
What time is high tide today in Merville-Franceville-Plage?
Today in Merville-Franceville-Plage there are high tides at 11:33 am (25.8 ft) and 11:57 pm (25.0 ft) and low tides at 6:58 am and 7:25 pm. Tide coefficient 88.
What time is sunset today in Merville-Franceville-Plage?
At 5:45 pm. There is light until the end of civil twilight, at 6:18 pm.
What time is sunrise tomorrow in Merville-Franceville-Plage?
At 7:45 am. First light comes at 6:35 am.
What phase is the moon today?
Waning gibbous, 85% illuminated. New moon on Mon, Nov 9 · 8:03 am.
When are the next spring tides?
From November 9 to 11.
What are today's solunar periods?
Major 2:26–4:26 am, Minor 11:48 am–12:48 pm, Major 2:58–4:58 pm, Minor 7:08–8:08 pm. Today's activity is medium.
What's the weather like today in Merville-Franceville-Plage?
Fog, from 41 °F to 59 °F, with a light breeze from the south-southeast (6 mph) and a 0% chance of rain.
How is the sea today in Merville-Franceville-Plage?
Smooth (Douglas 2): 0.4 ft waves with a period of 3.7 s from the northwest. The water is 57.4 °F.
When is the best time to visit Merville-Franceville-Plage?
The best time to visit Merville-Franceville-Plage is from July to August: highs of 72 °F to 73 °F, about 7 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: Ouistreham 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).