France · Morbihan
Castoul
Morbihan, France
Right now
Live conditions from Open-Meteo, refreshed hourly.
7-day outlook
7-day marine forecast from Open-Meteo.
Sea temperature
Next 7 days, °C
Wave height
Next 7 days, metres
View as table
| Day | Sea temp (°C) | Wave height (m) |
|---|---|---|
| Wed 2 | 20.4 | 0.8 |
| Thu 3 | 20.7 | 0.9 |
| Fri 4 | 20.8 | 1.0 |
| Sat 5 | 21.3 | 0.9 |
| Sun 6 | 21.0 | 1.0 |
| Mon 7 | 21.0 | 1.4 |
| Tue 8 | 20.8 | 1.9 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Excellent2015
- 2016: Excellent2016
- 2017: Excellent2017
- 2018: Excellent2018
- 2019: Good2019
- 2020: Good2020
- 2021: Good2021
- 2022: Good2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Excellent2025
Excellent in the most recent season, and 11 of 11 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Excellent |
| 2016 | Excellent |
| 2017 | Excellent |
| 2018 | Excellent |
| 2019 | Good |
| 2020 | Good |
| 2021 | Good |
| 2022 | Good |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Excellent |
Typical sea temperature by month
Modeled estimatePlausible seasonal climatology derived from latitude, for illustration — not a measured average.
Monthly sea temperature
Typical range across the year, °C
View as table
| Month | Typical sea temp (°C) |
|---|---|
| Jan | 15 |
| Feb | 14 |
| Mar | 15 |
| Apr | 17 |
| May | 19 |
| Jun | 22 |
| Jul | 23 |
| Aug | 24 |
| Sep | 24 |
| Oct | 22 |
| Nov | 20 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Ramonette1.6 kmMorbihan
- Port Guen2.7 kmMorbihan
- Les Grands Sables6.2 kmMorbihan
- Herlin6.2 kmMorbihan
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- By car: there's parking about ~560 m from the beach.
- Bus stop: Gare Routière, about ~940 m away.
Food, stays & town
- Nearest village: Le Palais, about ~1.1 km away.
- 3 places to stay mapped nearby Closest is Villa de Jade, about ~530 m away.
What kind of beach is this?
This beach belongs to a small coastal village. It's usually calmer than a resort or town beach, though a popular village spot can still fill up on the best summer days.
Estimated from OpenStreetMap surroundings data (ODbL).
Is the water clean at Castoul?
Castoul sits on a stretch of coast classed as a coastal bathing site, carrying an official EU Bathing Water rating of Excellent for the 2025 season. Under the EU Bathing Water Directive, national authorities test for intestinal enterococci and E. coli through the season and report the results the following spring — the 2025 rating was published in spring 2026, and 2026's won't follow until spring 2027. In addition to that yearly rating, some national authorities — for Croatia, the national environmental authority — publish individual water sample results during the season itself, ahead of the annual report. It sits in Morbihan. You can park about ~560 m away.
Looking to avoid the busiest weeks? The water is typically warmest around August, with the most reliable swimming window running July–September; outside that stretch you'll find a cooler sea but a quieter beach. That rating has been consistent: every one of the 11 classified seasons on record has come back Excellent or Good. Le Palais — the closest town — sits about ~1.1 km from here.
“Excellent” is one point on a four-step scale — Excellent, Good, Sufficient or Poor — assigned once per year from that season's water samples, not a live reading. It describes how the site performs on average across the season, not the exact water quality this afternoon; for day-to-day sea conditions, see the “Right now” and 7-day outlook panels above.
Frequently asked questions
Is Castoul a safe beach for swimming?
Yes. Its official 2025 EU Bathing Water rating is Excellent, the top classification, and 11 of the 11 classified seasons on record have rated Excellent or Good. It's also held steady at Excellent for 3 straight years.
Is the sea warm at Castoul today?
As of the latest update, the sea temperature at Castoul is around 20°C — see the “Right now” panel above for live conditions. That's the reading right off Morbihan.
Which month has the warmest sea at Castoul?
July–September is typically the most reliable swimming window, with the sea usually warmest in the second half of summer. That applies to the water around Morbihan.
What's behind the water quality rating shown above?
The annual classification — Excellent, Good, Sufficient or Poor — is built from a full season of official testing for intestinal enterococci and E. coli, reported to the European Environment Agency each spring. Some national authorities (Croatia's IZOR among them) also publish individual samples during the season itself; Castoul isn't yet covered by that in-season feed.
How do I get to Castoul without a car?
By car, there's parking about ~560 m from the beach. By bus, the nearest stop is Gare Routière, about ~940 m away. The nearest town is Le Palais, about ~1.1 km away.