France · Alpes-de-Haute-Provence
Plan Du Lac de Castillon
Alpes-de-Haute-Provence, France
On the beach
Right now
Sample dataIllustrative conditions — the live Open-Meteo marine feed wasn't reachable, so these are deterministic placeholder values that will be replaced automatically once the feed is available.
7-day outlook
Sample dataModeled placeholder forecast for demonstration — will be replaced by a live marine-weather feed.
Sea temperature
Next 7 days, °C
Wave height
Next 7 days, metres
View as table
| Day | Sea temp (°C) | Wave height (m) |
|---|---|---|
| Wed 2 | 27.2 | 0.5 |
| Thu 3 | 26.7 | 0.5 |
| Fri 4 | 26.3 | 0.5 |
| Sat 5 | 26.4 | 0.5 |
| Sun 6 | 26.9 | 0.5 |
| Mon 7 | 27.4 | 0.5 |
| Tue 8 | 27.5 | 0.5 |
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: Excellent2019
- 2020: Good2020
- 2021: Good2021
- 2022: Excellent2022
- 2023: Good2023
- 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 | Excellent |
| 2020 | Good |
| 2021 | Good |
| 2022 | Excellent |
| 2023 | Good |
| 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 | 15 |
| Mar | 16 |
| Apr | 18 |
| May | 20 |
| Jun | 23 |
| Jul | 25 |
| Aug | 26 |
| Sep | 25 |
| Oct | 23 |
| Nov | 20 |
| Dec | 18 |
Location & nearby beaches
Nearby beaches
- Base Nautique4.3 kmAlpes-de-Haute-Provence
- Plage Du Cheiron7.8 kmAlpes-de-Haute-Provence
- Camping Du Brec23 kmAlpes-de-Haute-Provence
- Pont Du Galetas27 kmAlpes-de-Haute-Provence
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- Easy by car — there's parking close to the beach.
Food, stays & town
- Nearest village: Saint-André-les-Alpes, about ~2.7 km away.
- 1 place to eat within 1 km Closest is Snack du Lac, about ~160 m away.
What kind of beach is this?
With no facilities mapped nearby, this beach is usually on the quiet side even in season — worth knowing if you're after solitude, but also worth bringing your own water and shade.
Estimated from OpenStreetMap surroundings data (ODbL).
- A quiet swim
Is the water clean at Plan Du Lac de Castillon?
Plan Du Lac de Castillon sits on a stretch of coast classed as a lake 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 Alpes-de-Haute-Provence. There's parking about ~110 m from the beach.
That rating has been consistent: every one of the 11 classified seasons on record has come back Excellent or Good. The most reliable swimming window here typically runs from July–September, with the sea usually at its warmest around August. Outside that window the water is cooler and often quieter. It's been a consistently reliable spot too — the rating has held at Excellent for 2 straight years. The nearest town, Saint-André-les-Alpes, is about ~2.7 km away.
That “Excellent” 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. There's 1 place to eat near the beach — Snack du Lac, about ~160 m away.
Frequently asked questions
Should you swim at Plan Du Lac de Castillon?
Plan Du Lac de Castillon is rated Excellent for 2025 — the top EU Bathing Water classification — with 11 of 11 classified seasons rating Excellent or Good, so yes. It's also held steady at Excellent for 2 straight years.
What is the sea temperature at Plan Du Lac de Castillon today?
For Plan Du Lac de Castillon, the ~27°C figure above is a stand-in value, not a live reading — the marine-weather feed was unreachable when the page last built, and it'll swap in automatically once the feed responds again. That's the reading right off Alpes-de-Haute-Provence. On the modeled climatology here, August usually runs warmest.
When is the best time to swim at Plan Du Lac de Castillon?
For the warmest water, aim for July–September — that's when the modeled sea temperature is typically at its best. That applies to the water around Alpes-de-Haute-Provence. Within that window, August is typically the single warmest month.
How is bathing water quality actually assessed?
Behind the annual grade: a season of testing for intestinal enterococci and E. coli, reported to the European Environment Agency each spring under the EU Bathing Water Directive. A few countries, Croatia via IZOR included, also publish individual in-season samples ahead of that report, but Plan Du Lac de Castillon doesn't have one published yet.
What's the easiest way to reach Plan Du Lac de Castillon?
By car, it's easy — parking is right by the beach. The nearest town is Saint-André-les-Alpes, about ~2.7 km away.