El Astillero tides today
- Tide now 5.2 ft ↓ falling · low 11:48 pm (2.2 ft)
- Best time to fish 10:50 pm–12:00 am good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 8.1 ft · 64 °F moderate · 11.5 s from the northwest
- Wind · air 7 mph · 57 °F from the ENE, gusts 15 · fog
- Sun 7:45 am–6:12 pm 10 h 27 min of daylight
- Moon 93% · 7:27 pm waning gibbous · rises at 7:27 pm
- Diving tomorrow 11:30 am–1:10 pm average day · 5/10
Today in El Astillero there are high tides at 5:19 am (14.3 ft) and 5:45 pm (14.1 ft) and low tides at 11:31 am and 11:48 pm. Tide coefficient 98. Right now the tide is falling toward the low tide at 11:48 pm. The sun rises at 7:45 am and sets at 6:12 pm: 10 h 27 min of daylight. The moon is 93% illuminated (waning gibbous) and rises at 7:27 pm. Major solunar periods run from 1:38 am to 3:38 am and from 2:09 pm to 4:09 pm. The next spring tides arrive from October 26 to 28. The sea is moderate, with 8.1 ft waves. There's a light breeze from the east-northeast (7 mph). Fog, 57 °F.
Fishing in El Astillero today
Best time to fish
Solunar activity today: high- High tide at 5:45 pm, coefficient 95
- Sunset at 6:12 pm, golden hour from 5:32 pm
- Steady pressure (30.24 inHg), light onshore wind (12 mph) and 8.1 ft waves
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 98 (spring tides)
Your day at a glance
The best window, 5:30 pm to 6:40 pm, combines the 5:45 pm high tide, sunset and a light onshore breeze. Also worth a try from 10:30 am to 11:20 am, with the 11:31 am low tide, moonset and a light onshore breeze, though with rising pressure. Also good from 10:50 pm to 12:00 am, with the 11:48 pm low tide, falling pressure and a light onshore breeze.
Species with the most records nearby: small-spotted catshark, Atlantic horse mackerel, European hake and European conger. October is one of the months when these are seen most: small-spotted catshark. What you can catch
Beach day in El Astillero
Is it a beach day?
- Mostly sunny
- Low tide at 11:31 am: more sand
- Feels like 61 °F: chilly for the beach
- Light onshore wind (12 mph): choppy water
- Dangerous for swimming: 8.1 ft waves every 12 s; high rip current risk
- Water at 64 °F (cold)
Dangerous surf during beach hours. Stay out if the red flag is up, and never swim where there is no lifeguard.
Today, hour by hour
- Swimming Dangerous · 8.1 ft
8.1 ft waves every 12 s: dangerous for swimming. Stay out if the red flag is up. High rip current risk. If you're caught in a rip current, don't swim against it: swim parallel to shore and wave for help. Always follow the lifeguard's flags.
- Water 64 °F
Cold: ease in slowly.
- Sun & sunscreen UV 2 · SPF 15
Max UV 2 (low): SPF 15 sunscreen.
- Wind 12 mph
Onshore breeze (12 mph).
- Tide & sand 11:48 pm
Low tide at 11:31 am and 11:48 pm: that's when there's the most sand. High tide at 5:19 am and 5:45 pm. Coefficient 98 (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 El Astillero
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Playa artificial de Punta Parayas 1.5 mi · N
- Restrooms
- Showers
- Parking
- Playa de El Puntal 4.9 mi · NE
- Restrooms
- Parking
- Nudity allowed
Excellent water quality 2025 season, EEA
- Playa de los Peligros 5.0 mi · NE
- Lifeguard
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, EEA
- Magdalena Beach 5.2 mi · NE
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, EEA
- El Camello Beach 5.2 mi · NE
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, EEA
- Bikini Beach 5.3 mi · NE
- Restrooms
- Showers
- Playa de La Concha 5.3 mi · NE
- Restrooms
- Parking
- Playa de La Maruca 5.5 mi · N
- Lifeguard
- 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). Bathing water quality: European Environment Agency (EEA), with data from the Spanish Ministry of Health (Náyade).
Webcams near El Astillero
Webcams provided by windy.com — add a webcam
Tides in El Astillero
Today's high and low tides
- ▲ High tide 5:19 am 14.3 ft · coef. 98
- ▼ Low tide 11:31 am 1.7 ft
- ▲ High tide 5:45 pm 14.1 ft · coef. 95
- ▼ Next low tide 11:48 pm 2.2 ft
↓ Falling The tide is falling. 1 h 56 min to low tide at 11:48 pm.
Tide coefficient 98 for the 5:19 am high tide and 95 for the 5:45 pm high tide. Spring tides. The water rises and falls 12.6 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 20 (14.7 ft) and the lowest, on April 19 (0.9 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 99, 12.9 ft range). The smallest, on October 19 (coefficient 27, 4.1 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 | 7:45 am · 6:12 pm | High tide 5:19 am · 14.3 ft | Low tide 11:31 am · 1.7 ft | High tide 5:45 pm · 14.1 ft | Low tide 11:48 pm · 2.2 ft | Coef. 98 | 93% | Major periods 1:38 am · 2:09 pm | High |
| Thu 29 | 7:47 am · 6:11 pm | High tide 6:02 am · 14.0 ft | Low tide 12:17 pm · 2.1 ft | High tide 6:32 pm · 13.4 ft | — | Coef. 92 | 85% | Major periods 2:41 am · 3:14 pm | Medium |
| Fri 30 | 7:48 am · 6:09 pm | Low tide 12:34 am · 2.9 ft | High tide 6:50 am · 13.5 ft | Low tide 1:08 pm · 2.7 ft | High tide 7:26 pm · 12.5 ft | Coef. 81 | 76% | Major periods 3:46 am · 4:18 pm | Medium |
| Sat 31 | 7:49 am · 6:08 pm | Low tide 1:25 am · 3.7 ft | High tide 7:46 am · 12.7 ft | Low tide 2:06 pm · 3.6 ft | High tide 8:32 pm · 11.6 ft | Coef. 68 | 66% | Major periods 4:49 am · 5:19 pm | Medium |
| Sun 1 | 7:50 am · 6:07 pm | Low tide 2:25 am · 4.6 ft | High tide 8:57 am · 12.0 ft | Low tide 3:19 pm · 4.3 ft | High tide 9:56 pm · 10.9 ft | Coef. 56 | Last quarter | Major periods 5:48 am · 6:15 pm | Medium |
| Mon 2 | 7:52 am · 6:05 pm | Low tide 3:42 am · 5.2 ft | High tide 10:24 am · 11.6 ft | Low tide 4:46 pm · 4.6 ft | High tide 11:23 pm · 10.9 ft | Coef. 50 | 43% | Major periods 6:41 am · 7:07 pm | Medium |
| Tue 3 | 7:53 am · 6:04 pm | Low tide 5:09 am · 5.2 ft | High tide 11:47 am · 11.8 ft | Low tide 6:07 pm · 4.3 ft | — | Coef. 52 | 33% | Major periods 7:31 am · 7:54 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 Santander station (TICON-4), 4.4 mi from El Astillero. 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 El Astillero
Sea stateSea state: moderate
The waves you may find
- Most commonMost common4.0 ft
- Significant8.1 ft
- Highest expectedHighest16 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 16 ft. Before heading out, expect waves of up to 16 ft.
Wind on the coast and offshore
The model doesn't separate offshore wind here: it's the same as on the coast.
Cross-onshore wind. The coast faces northeast 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: 8.2 ft with a period of 12 s, from the northwest (moderate).
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 9:52 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from Euskalmet: Basque Meteorological Agency, via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Diving in El Astillero today
Diving and snorkeling today
Likely visibility: poor- Slack water around low tide (11:31 am): little current from 11:10 am to 11:50 am
- 7.5 ft swell at 11 s from the northwest: heavy surge on the bottom
- Light onshore wind (11 mph)
- 0.1 mph current toward the west, weak (model)
- Sun high: more light underwater
Not a day for shore diving: swell, wind, current or storms during the best window. If you go, go with a dive shop and only if they give the OK.
- Slack water today: high tide 5:19 am (5:00–5:40 am), low tide 11:31 am (11:10–11:50 am), high tide 5:45 pm (5:20–6:10 pm) and low tide 11:48 pm (11:30 pm–12:10 am)
- Likely visibility: poor. Swell (up to 9.5 ft at 10 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 63.5 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: better not, with these waves, wind or current.
- Night dive: dark from 6:42 pm. Waning gibbous (93%), rising at 7:27 pm: a bright night.
Your diving day at a glance
The best window, 10:40 am to 12:20 pm, combines slack water at low tide, light wind, weak current and the sun high, though with a big swell. Also worth a look from 5:00 pm to 6:10 pm, with slack water at high tide and light wind, though with a big swell 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
- Liencres Fish seen: Learned Rockfich, Corkwing Wrasse, ballan wrasse, goldsinny wrasse 7.7 mi
- Boqueron 11 mi
- Nuevo Jorge 12 mi
- Wreck 6.6 mi
- Mourosub 2.1 mi
- Acquatur Centro de Buceo 2.2 mi
- Buceo Acquatur 2.8 mi
- Centro Buceo Pedreña 4.2 mi
- Santander, Cantabria, Spain 4.2 mi
- Centro de Buceo Calypso Cantabria 8.0 mi
- Club Buceo Galatea 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. Sites and fish: Reef Life Survey / IMOS NRMN, CC BY 4.0; fish names, Wikidata.
Weather in El Astillero
Now in El Astillero
- Low / high
- 55 / 64 °F
- Rain
- 0.00 in · 52%
- Clouds
- 39%
- Humidity
- 71%
- Dew pointDew point
- 47 °F
- Visibility
- 3.9 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 23
- 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: −0.03 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 | Overcast | Overcast | Overcast | Partly cloudy | Mainly clear | Mainly clear | Mainly clear | Mainly clear |
| Temperature | 59° | 58° | 55° | 58° | 63° | 64° | 60° | 58° |
| Wind (mph) | 5 S | 1 E | 1 ESE | 4 ENE | 10 E | 12 E | 12 E | 9 E |
| Gusts | 9 | 2 | 2 | 9 | 19 | 22 | 22 | 19 |
| Waves | 5.6 ft | 6.4 ft | 7.5 ft | 8.0 ft | 7.8 ft | 7.8 ft | 8.1 ft | 8.1 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 |
- 9:00 pm 58° 9 E 8.1 ft
- 12:00 am 54° 4 ENE 7.7 ft
- 3:00 am 51° 0 NW 6.6 ft
- 6:00 am 50° 1 SE 5.4 ft
- 9:00 am 51° 1 ESE 4.7 ft
- 12:00 pm 61° 1 NNE 4.6 ft
- 3:00 pm 65° 2 E 4.7 ft
- 6:00 pm 61° 4 ENE 4.6 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 55 / 64 °F | 12 mph E | 8.2 ft | 5:19 am · 5:45 pm | |
| Thu 29 | 50 / 65 °F | 5 mph E | 7.7 ft | 6:02 am · 6:32 pm | |
| Fri 30 | 50 / 65 °F | 5 mph ENE | 3.3 ft | 6:50 am · 7:26 pm | |
| Sat 31 | 49 / 62 °F | 5 mph SE | 4.2 ft | 7:46 am · 8:32 pm | |
| Sun 1 | 43 / 62 °F | 5 mph SE | 4.3 ft | 8:57 am · 9:56 pm | |
| Mon 2 | 47 / 60 °F | 11 mph E | 4.0 ft | 10:24 am · 11:23 pm | |
| Tue 3 | 53 / 57 °F | 11 mph ENE | 4.1 ft | 11:47 am | |
| Wed 4 | 51 / 55 °F | 17 mph E | 3.8 ft | 12:34 am · 12:56 pm | |
| Thu 5 | 52 / 60 °F | 14 mph ESE | 3.7 ft | 1:30 am · 1:50 pm | |
| Fri 6 | 53 / 65 °F | 13 mph SSE | 2.5 ft | 2:16 am · 2:36 pm | |
| Sat 7 | 59 / 67 °F | 14 mph S | 2.1 ft | 2:55 am · 3:15 pm | |
| Sun 8 | 61 / 67 °F | 14 mph SSE | 1.5 ft | 3:31 am · 3:50 pm | |
| Mon 9 | 62 / 69 °F | 16 mph SSE | 1.4 ft | 4:04 am · 4:23 pm | |
| Tue 10 | 60 / 64 °F | 12 mph SW | 2.0 ft | 4:36 am · 4:55 pm |
- Thu 29 Fog 50° / 65° 7.7 ft
- Fri 30 Fog 50° / 65° 3.3 ft
- Sat 31 Fog 49° / 62° 4.2 ft
- Sun 1 Fog 43° / 62° 4.3 ft
- Mon 2 Fog 47° / 60° 4.0 ft
- Tue 3 Light drizzle 53° / 57° 4.1 ft
- Wed 4 Light drizzle 51° / 55° 3.8 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.
- Normal Today, cooler than normal for late October (−2.7 °F; normal high: 67 °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 9:52 pm (local time).
The sun in El Astillero
Sunrise and sunset
- First light 6:42 am
- Full dark 7:15 pm
- Civil dawn 7:16 am
- Civil dusk 6:42 pm
- Solar noon 12:59 pm (33° high)
- Daylight 10 h 27 min (−3 min)
- Evening golden hour 5:32 pm
- Full dark 7:15 pm
Golden hour and the day-night map
Today the sun is 92,359,602 mi away and looks 32′ 11″ across.
The moon in El Astillero
Moon phase and position
Today the moon is 226,461 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 1:38–3:38 am Major · the moon passes overhead · high activity
- 2:09–4:09 pm Major · the moon passes underfoot · high activity
- 10:17–11:17 am Minor · moonset · medium activity
- 6:57–7:57 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 El Astillero
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Dársena de Orconera 0.3 mi
- Embarcadero de El Puntal 4.6 mi
- Sillares del Muelle de Naos 4.2 mi
- Antiguo puerto 4.7 mi
- Boat ramp 1.9 mi
- Boat ramp 1.9 mi
- Boat ramp 3.5 mi
- Puerto deportivo de Astillero 0.3 mi
- Muelle de Orconera 0.3 mi
- El Pescador de Raos 2.2 mi
- Pesca Raos 38 2.2 mi
- Fuel dock 4.2 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: even 3.1 mi from shore the water is less than 16 ft deep.
From the shoreline (0.3 mi from El Astillero) out to sea, heading northeast.
How far from shore
- 16 ft deepnot within 3.1 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. Very shallow: the water doesn't reach 16 ft within 3.1 mi. Cast far from the beach, ideally around high tide.
- 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.
Inside bays, estuaries and harbors the bottom changes a lot from spot to spot (channels and shoals): use this only as a rough guide. The profile is turned slightly from the coast so it does not run into an island or a headland.
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
_04.JPG)
Mouro Island Lighthouse 6.0 mi northeast
- Light
- 3 white flashes every 16 s · Fl(3) W 16s
- Range
- 11 nautical miles (13 mi)
- Light height
- 128 ft above sea level
- Tower height
- 61 ft
- Built
- 1860
Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near El AstilleroTides nearby
- Maliaño1.4 mi
- Pedreña3.7 mi
- Santander4.6 mi
- Somo5.5 mi
- Liencres6.8 mi
- Miengo9.1 mi
- Suances11 mi
- Bareyo12 mi
- San Miguel de Meruelo12 mi
- Isla14 mi
El Astillero at a glance
- Town or city of about 18,108 people. Coordinates: 43.401° N, 3.821° W.
- It is 4.6 mi south of Santander, the main place in Cantabria. The sun rises at the same time and sets at the same time than in Santander.
- The nearest tide station, Santander, is 4.4 mi to the north.
- Its coast faces northeast.
- Beaches and harbors nearby: Club Náutico Ría de Solia (0.3 mi), Port of Deportivo Marina de Santander (2.0 mi), Santander (2.7 mi), Playa Los Peligros (5.0 mi).
Questions about El AstilleroQuestions
What time is high tide today in El Astillero?
Today in El Astillero there are high tides at 5:19 am (14.3 ft) and 5:45 pm (14.1 ft) and low tides at 11:31 am and 11:48 pm. Tide coefficient 98.
What time is sunset today in El Astillero?
At 6:12 pm. There is light until the end of civil twilight, at 6:42 pm.
What time is sunrise tomorrow in El Astillero?
At 7:47 am. First light comes at 6:43 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 1:38–3:38 am, Minor 10:17–11:17 am, Major 2:09–4:09 pm, Minor 6:57–7:57 pm. Today's activity is high.
What's the weather like today in El Astillero?
Fog, from 55 °F to 64 °F, with a light breeze from the east-northeast (7 mph) and a 52% chance of rain.
How is the sea today in El Astillero?
Moderate (Douglas 4): 8.1 ft waves with a period of 11.5 s from the northwest. The water is 63.5 °F.
When is the best time to visit El Astillero?
The best time to visit El Astillero is from June to August: highs of 73 °F to 77 °F, about 5 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: Santander 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).