Saint-Cast-le-Guildo tides today
- Tide now 29.0 ft ↑ rising · high 8:48 am (40.4 ft)
- Best time to fish 3:10–4:50 pm good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 1.5 ft · 60 °F smooth · 9.8 s from the west-northwest
- Wind · air 7 mph · 51 °F from the SE, gusts 10 · overcast
- Sun 7:51 am–5:54 pm 10 h 4 min of daylight
- Moon 85% · 7:51 pm waning gibbous · rises at 7:51 pm
- Best time to dive 8:30–9:30 am great day · 9/10
Today in Saint-Cast-le-Guildo there are high tides at 8:48 am (40.4 ft) and 9:12 pm (39.0 ft) and low tides at 3:25 am and 3:49 pm. Tide coefficient 93. Right now the tide is rising toward the high tide at 8:48 am. The sun rises at 7:51 am and sets at 5:54 pm: 10 h 4 min of daylight. The moon is 85% illuminated (waning gibbous) and rises at 7:51 pm. Major solunar periods run from 2:35 am to 4:35 am and from 3:07 pm to 5:07 pm. The next spring tides arrive from November 9 to 11. The sea is smooth, with 1.5 ft waves. There's a light breeze from the southeast (7 mph). Overcast, 51 °F.
Fishing in Saint-Cast-le-Guildo today
Best time to fish
Solunar activity today: medium- Low tide at 3:49 pm
- Major period 3:07–5:07 pm
- Steady pressure (30.30 inHg), light cross-shore wind (11 mph) and calm sea (1.5 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 93 (spring tides)
Your day at a glance
The best window, 3:10 pm to 4:50 pm, combines the 3:49 pm low tide and a major period. Also good from 7:50 am to 8:40 am, with the 8:48 am high tide and sunrise. Also good from 2:30 am to 4:30 am, with the 3:25 am low tide and a major period.
Species with the most records nearby: small-spotted catshark, ballan wrasse, common cuttlefish and black seabream. October is one of the months when these are seen most: ballan wrasse and common cuttlefish. What you can catch
Beach day in Saint-Cast-le-Guildo
Is it a beach day?
- Calm for swimming: 1.5 ft waves
- Low tide at 3:49 pm: more sand
- Cloudy (91% cloud cover)
- Feels like 54 °F: chilly for the beach
- Moderate cross-shore wind (12 mph)
- Water at 60 °F (cold)
Today, hour by hour
- Swimming Calm · 1.5 ft
1.5 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 60 °F
Cold: ease in slowly.
- Sun & sunscreen UV 2 · SPF 15
Max UV 2 (low): SPF 15 sunscreen.
- Wind 12 mph
Moderate cross-shore wind (12 mph).
- Tide & sand 3:49 pm
Low tide at 3:25 am and 3:49 pm: that's when there's the most sand. High tide at 8:48 am and 9:12 pm. Coefficient 93 (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 Saint-Cast-le-Guildo
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Grande Plage 0.5 mi · E
- Lifeguard
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, EEA
- Plage de la Fresnaye 0.8 mi · NW
- Restrooms
- Showers
Excellent water quality 2025 season, EEA
- Plage de la Pissotte 0.9 mi · NW
- Parking
Excellent water quality 2025 season, EEA
- Plage de la Mare 1.0 mi · N
- Restrooms
- Parking
Excellent water quality 2025 season, EEA
- Plage de la Fosse 1.3 mi · W
- Parking
Sufficient water quality 2025 season, EEA
- Plage de Pen Guen 1.4 mi · SE
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, EEA
- Port Saint Jean 1.4 mi · W
- Parking
- Plage de Château Serein 2.4 mi · W
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 Saint-Cast-le-Guildo
Webcams provided by windy.com — add a webcam
Tides in Saint-Cast-le-Guildo
Today's high and low tides
- ▼ Low tide 3:25 am 5.6 ft
- ▲ Next high tide 8:48 am 40.4 ft · coef. 93
- ▼ Low tide 3:49 pm 5.9 ft
- ▲ High tide 9:12 pm 39.0 ft · coef. 89
↑ Rising The tide is rising. 2 h 2 min to high tide at 8:48 am.
Tide coefficient 93 for the 8:48 am high tide and 89 for the 9:12 pm high tide. Spring tides. The water rises and falls 34.8 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 (41.8 ft) and the lowest, on March 20 (2.4 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 100, 36.7 ft range). The smallest, on October 20 (coefficient 26, 9.7 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 | 7:51 am · 5:54 pm | Low tide 3:25 am · 5.6 ft | High tide 8:48 am · 40.4 ft | Low tide 3:49 pm · 5.9 ft | High tide 9:12 pm · 39.0 ft | Coef. 93 | 85% | Major periods 2:35 am · 3:07 pm | Medium |
| Fri 30 | 7:52 am · 5:53 pm | Low tide 4:09 am · 7.4 ft | High tide 9:29 am · 38.6 ft | Low tide 4:35 pm · 7.8 ft | High tide 9:56 pm · 36.6 ft | Coef. 84 | 76% | Major periods 3:39 am · 4:11 pm | Medium |
| Sat 31 | 7:54 am · 5:51 pm | Low tide 4:55 am · 9.8 ft | High tide 10:14 am · 36.2 ft | Low tide 5:24 pm · 10.1 ft | High tide 10:45 pm · 33.8 ft | Coef. 71 | 66% | Major periods 4:42 am · 5:12 pm | Medium |
| Sun 1 | 7:55 am · 5:49 pm | Low tide 5:47 am · 12.3 ft | High tide 11:08 am · 33.4 ft | Low tide 6:24 pm · 12.3 ft | High tide 11:50 pm · 31.1 ft | Coef. 58 | Last quarter | Major periods 5:41 am · 6:09 pm | Medium |
| Mon 2 | 7:57 am · 5:48 pm | Low tide 6:53 am · 14.2 ft | High tide 12:23 pm · 31.1 ft | Low tide 7:37 pm · 13.5 ft | — | Coef. 47 | 43% | Major periods 6:35 am · 7:00 pm | Medium |
| Tue 3 | 7:58 am · 5:46 pm | High tide 1:21 am · 29.7 ft | Low tide 8:14 am · 14.7 ft | High tide 1:58 pm · 30.7 ft | Low tide 8:59 pm · 13.2 ft | Coef. 46 | 33% | Major periods 7:25 am · 7:48 pm | Medium |
| Wed 4 | 8:00 am · 5:45 pm | High tide 2:53 am · 30.5 ft | Low tide 9:32 am · 13.4 ft | High tide 3:20 pm · 32.1 ft | Low tide 10:11 pm · 11.4 ft | Coef. 55 | 23% | Major periods 8:11 am · 8:33 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
Saint-Cast-le-Guildo has no station of its own, so we use the tide at Saint-Malo (TICON-4), 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: 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 Saint-Cast-le-Guildo
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.8 ft
- Significant1.5 ft
- Highest expectedHighest3.0 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 3.0 ft. Before heading out, expect waves of up to 3.0 ft.
Wind on the coast and offshore
Cross-offshore wind. The coast faces north and the wind comes off the land at an angle: calmer water near the shore, and bait and boats drift out to sea.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Tuesday 3: 3.1 ft with a period of 4 s, from the northeast (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 57.8 °F by Wednesday 4.
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 6:47 am (local time).
Surf in Saint-Cast-le-Guildo today
Surf today
Poor- 1.0–1.5 ft surf at the shore, small: good for learning or a longboard
- 1.4 ft swell at 8 s from the west-northwest, a bit short; it hits this coast at an angle
- Light offshore wind (7 mph): it holds up and grooms the waves
- First or last light of the day
- Rising tide (high tide at 8:48 am)
- Light: First light 7:18 am · sunrise 7:51 am · sunset 5:54 pm · last light 6:27 pm
- Tide: low 3:25 am (5.6 ft), high 8:48 am (40.4 ft), low 3:49 pm (5.9 ft) and high 9:12 pm (39.0 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 59.5 °F: a 4/3 fullsuit (booties if you run cold).
- Energy: 23 kJ · Low power
Today’s surf at a glance
The best window, 7:18 am to 11:00 am, has light offshore wind, though with small waves. 4:00 pm to 5:00 pm can also work, though with small 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 Saint-Cast-le-Guildo today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (8:48 am): little current from 8:30 am to 9:10 am
- 1.4 ft swell at 8 s from the west-northwest: some surge on the bottom
- Light offshore wind (6 mph)
- 0.5 mph current toward the west-northwest, weak (model)
- Daylight
- Slack water today: low tide 3:25 am (3:00–3:50 am), high tide 8:48 am (8:30–9:10 am), low tide 3:49 pm (3:20–4:10 pm) and high tide 9:12 pm (8:57–9:30 pm)
- Likely visibility: good. Swell (up to 2.8 ft at 10 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 59.5 °F: a 7 mm wetsuit, with hood and booties.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 6:27 pm. Waning gibbous (85%), rising at 7:51 pm: a bright night.
Your diving day at a glance
The best window, 8:30 am to 9:30 am, combines slack water at high tide, light wind and weak current. Also worth a look from 2:30 pm to 4:30 pm, with slack water at low tide, little swell, light wind and the sun high, though with 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
- Laplace 2.3 mi
- Fremur 4.0 mi
- Soleil Royal 5.6 mi
- La Houle 5.6 mi
- Ijmuiden 6.1 mi
- Skeldon 8.0 mi
- Ro 21 8.0 mi
- Wreck 4.2 mi
- Wreck 5.8 mi
- Saint-Cast Plongée 0.3 mi
- Plongevasion 1.0 mi
- St Cast Plongée 1.0 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 Saint-Cast-le-Guildo
Now in Saint-Cast-le-Guildo
- Low / high
- 51 / 60 °F
- Rain
- 0.00 in · 0%
- Clouds
- 100%
- Humidity
- 80%
- Dew pointDew point
- 45 °F
- Visibility
- 18 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 25
- 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). It barely changes over the next 48 hours. 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 | Overcast | Overcast | Partly cloudy | Overcast | Partly cloudy |
| Temperature | 54° | 53° | 52° | 51° | 55° | 59° | 59° | 57° |
| Wind (mph) | 5 SSE | 3 S | 6 SE | 6 SE | 9 SE | 12 ESE | 14 E | 12 E |
| Gusts | 11 | 6 | 9 | 10 | 13 | 16 | 17 | 18 |
| Waves | 1.8 ft | 1.6 ft | 1.5 ft | 1.4 ft | 1.3 ft | 1.4 ft | 1.4 ft | 1.3 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 |
- 6:00 am 52° 6 SE 1.5 ft
- 9:00 am 51° 6 SE 1.4 ft
- 12:00 pm 55° 9 SE 1.3 ft
- 3:00 pm 59° 12 ESE 1.4 ft
- 6:00 pm 59° 14 E 1.4 ft
- 9:00 pm 57° 12 E 1.3 ft
- 12:00 am 55° 14 ESE 1.2 ft
- 3:00 am 52° 8 ESE 1.2 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 51 / 60 °F | 15 mph ESE | 1.8 ft | 8:48 am · 9:12 pm | |
| Fri 30 | 49 / 59 °F | 17 mph E | 1.6 ft | 9:29 am · 9:56 pm | |
| Sat 31 | 49 / 56 °F | 13 mph E | 1.8 ft | 10:14 am · 10:45 pm | |
| Sun 1 | 50 / 55 °F | 12 mph ENE | 2.5 ft | 11:08 am · 11:50 pm | |
| Mon 2 | 48 / 57 °F | 15 mph ENE | 3.0 ft | 12:23 pm | |
| Tue 3 | 49 / 55 °F | 13 mph NE | 3.1 ft | 1:21 am · 1:58 pm | |
| Wed 4 | 42 / 52 °F | 11 mph ENE | 2.8 ft | 2:53 am · 3:20 pm | |
| Thu 5 | 37 / 49 °F | 7 mph E | 2.6 ft | 4:01 am · 4:21 pm | |
| Fri 6 | 37 / 51 °F | 6 mph E | 1.7 ft | 4:53 am · 5:10 pm | |
| Sat 7 | 41 / 58 °F | 9 mph SSE | 2.0 ft | 5:36 am · 5:53 pm | |
| Sun 8 | 50 / 57 °F | 10 mph SSE | 1.5 ft | 6:16 am · 6:32 pm | |
| Mon 9 | 55 / 58 °F | 13 mph SSE | 1.8 ft | 6:52 am · 7:08 pm | |
| Tue 10 | 56 / 63 °F | 11 mph S | 1.5 ft | 7:26 am · 7:42 pm | |
| Wed 11 | 52 / 59 °F | 12 mph SW | 3.5 ft | 7:58 am · 8:14 pm |
- Fri 30 Partly cloudy 49° / 59° 1.6 ft
- Sat 31 Partly cloudy 49° / 56° 1.8 ft
- Sun 1 Overcast 50° / 55° 2.5 ft
- Mon 2 Overcast 48° / 57° 3.0 ft
- Tue 3 Light drizzle 49° / 55° 3.1 ft
- Wed 4 Clear sky 42° / 52° 2.8 ft
- Thu 5 Clear sky 37° / 49° 2.6 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 6:47 am (local time).
The sun in Saint-Cast-le-Guildo
Sunrise and sunset
- First light 6:41 am
- Full dark 7:04 pm
- Civil dawn 7:18 am
- Civil dusk 6:27 pm
- Solar noon 12:53 pm (28° high)
- Daylight 10 h 4 min (−3 min)
- Evening golden hour 5:09 pm
- Full dark 7:04 pm
Golden hour and the day-night map
Today the sun is 92,335,398 mi away and looks 32′ 11″ across.
The moon in Saint-Cast-le-Guildo
Moon phase and position
Today the moon is 226,618 mi away and looks 32′ 45″ across.
Solunar periods
Today's activity: medium- 2:35–4:35 am Major · the moon passes overhead · high activity
- 3:07–5:07 pm Major · the moon passes underfoot · high activity
- 11:53 am–12:53 pm Minor · moonset · medium activity
- 7:21–8:21 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 Saint-Cast-le-Guildo
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Ponton A1 0.8 mi
- Ponton A2 0.8 mi
- Jetty 0.8 mi
- Jetty 1.0 mi
- Boat ramp 0.8 mi
- Boat ramp 0.8 mi
- Boat ramp 1.0 mi
- Boat ramp 1.0 mi
- Port d'Armor 0.9 mi
- Port de la Bouvette 1.0 mi
- Pêche-Chasse 7.5 mi
- Côté Pêche 9.0 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 1,200 ft from shore and 33 ft at 0.8 mi.
From the shoreline (1 mi from Saint-Cast-le-Guildo) out to sea, heading north.
How far from shore
- 16 ft deep1,200 ft
- 33 ft deep0.8 mi
- 66 ft deep1.4 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 1,200 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. Shallow near shore: you only reach 33 ft at 0.8 mi. For dives deeper than 33 ft, 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
Saint-Cast-le-Guildo lighthouse 1.0 mi northeast
Other lighthouses nearby: Cap Fréhel lighthouse (4.6 mi northwest).
Data from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near Saint-Cast-le-GuildoTides nearby
- Matignon2.8 mi
- Fréhel4.9 mi
- Lancieux5.2 mi
- Saint-Briac-sur-Mer5.8 mi
- Créhen6.2 mi
- Ploubalay6.4 mi
- Plurien6.6 mi
- Saint-Lunaire6.8 mi
- Dinard9.0 mi
- Erquy9.4 mi
Saint-Cast-le-Guildo at a glance
- Town or city of about 3,363 people. Coordinates: 48.630° N, 2.259° W.
- It is 103 mi east of Brest, the main place in Brittany. The sun rises 8 min earlier and sets 9 min earlier than in Brest.
- The nearest tide station, Saint-Malo, is 11 mi to the east.
- Its coast faces north.
- Beaches and harbors nearby: Port Nieux (2.8 mi).
Questions about Saint-Cast-le-GuildoQuestions
What time is high tide today in Saint-Cast-le-Guildo?
Today in Saint-Cast-le-Guildo there are high tides at 8:48 am (40.4 ft) and 9:12 pm (39.0 ft) and low tides at 3:25 am and 3:49 pm. Tide coefficient 93.
What time is sunset today in Saint-Cast-le-Guildo?
At 5:54 pm. There is light until the end of civil twilight, at 6:27 pm.
What time is sunrise tomorrow in Saint-Cast-le-Guildo?
At 7:52 am. First light comes at 6:42 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 2:35–4:35 am, Minor 11:53 am–12:53 pm, Major 3:07–5:07 pm, Minor 7:21–8:21 pm. Today's activity is medium.
What's the weather like today in Saint-Cast-le-Guildo?
Overcast, from 51 °F to 60 °F, with a light breeze from the southeast (7 mph) and a 0% chance of rain.
How is the sea today in Saint-Cast-le-Guildo?
Smooth (Douglas 2): 1.5 ft waves with a period of 9.8 s from the west-northwest. The water is 59.5 °F.
When is the best time to visit Saint-Cast-le-Guildo?
The best time to visit Saint-Cast-le-Guildo is from July to August: highs of 72 °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: Saint-Malo 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).