On the beach
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 | 18.2 | 0.9 |
| Thu 3 | 18.3 | 0.8 |
| Fri 4 | 18.6 | 1.2 |
| Sat 5 | 19.0 | 1.1 |
| Sun 6 | 19.2 | 0.9 |
| Mon 7 | 19.4 | 1.1 |
| Tue 8 | 19.2 | 1.5 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Sufficient2015
- 2016: Sufficient2016
- 2017: Good2017
- 2018: Good2018
- 2019: Excellent2019
- 2020: Excellent2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Good2025
Good in the most recent season, and 9 of 11 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Sufficient |
| 2016 | Sufficient |
| 2017 | Good |
| 2018 | Good |
| 2019 | Excellent |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Good |
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 | 16 |
| May | 19 |
| Jun | 21 |
| Jul | 23 |
| Aug | 24 |
| Sep | 23 |
| Oct | 22 |
| Nov | 19 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Traon Erch494 mFinistère
- Man1.7 kmFinistère
- Sainte-Anne (Large)2.1 kmFinistère
- Roc'H Kroum2.1 kmFinistère
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
- Bus stop: Bonne Nouvelle, about ~720 m away.
Food, stays & town
- Nearest village: Roscoff, about ~1.9 km 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 Grande Greve?
Grande Greve sits on a stretch of coast classed as a coastal bathing site, carrying an official EU Bathing Water rating of Good 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 Finistère. You can park about ~130 m away.
Over the 11 classified seasons on record, 9 have come back Excellent or Good — a track record worth checking each year rather than assuming. If you're timing a visit around water temperature rather than crowds, July–September is the safest bet, with August typically the peak — expect a cooler, calmer sea either side of that stretch. Roscoff — the closest town — sits about ~1.9 km from here.
That “Good” label comes from a full season of official water sampling, not a single test — it's one step on a four-point scale (Excellent, Good, Sufficient, Poor) reassessed once a year. Today's actual conditions can differ from the seasonal average, so for a live snapshot see the “Right now” and 7-day outlook panels above. Worth noting: the rating slipped from Excellent to Good in 2025, so it's especially worth checking the latest local advisories.
Frequently asked questions
Is the water at Grande Greve safe right now?
Yes. Its official 2025 EU Bathing Water rating is Good, the second-highest classification, and 9 of the 11 classified seasons on record have rated Excellent or Good. That said, the rating slipped from Excellent to Good in 2025, so it's worth checking for current local advisories too.
How warm is the sea at Grande Greve right now?
As of the latest update, the sea temperature at Grande Greve is around 18°C — see the “Right now” panel above for live conditions. That's the reading right off Finistère.
What's the best month to visit Grande Greve for swimming?
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 Finistère.
What does the water quality rating actually measure?
National authorities sample the water for intestinal enterococci and E. coli bacteria through the bathing season and report the full-season results to the European Environment Agency each spring for the season just finished, which assigns one of four annual classifications — Excellent, Good, Sufficient or Poor — under the EU Bathing Water Directive. Some national authorities, including Croatia's IZOR, also publish individual in-season sample results ahead of that annual report.
Can you drive to Grande Greve?
By car, it's easy — parking is right by the beach. By bus, the nearest stop is Bonne Nouvelle, about ~720 m away. The nearest town is Roscoff, about ~1.9 km away.