France · Hautes-Alpes
Le Grand Pre - Les Tremouilles
Hautes-Alpes, 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 | 22.6 | 0.3 |
| Thu 3 | 22.9 | 0.3 |
| Fri 4 | 22.7 | 0.3 |
| Sat 5 | 22.2 | 0.3 |
| Sun 6 | 21.8 | 0.3 |
| Mon 7 | 21.8 | 0.3 |
| Tue 8 | 22.1 | 0.3 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Excellent2015
- 2016: Excellent2016
- 2017: Not classified2017
- 2018: Excellent2018
- 2019: Excellent2019
- 2020: Excellent2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Excellent2025
Excellent in the most recent season, and 10 of 10 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Excellent |
| 2016 | Excellent |
| 2017 | Not classified |
| 2018 | Excellent |
| 2019 | Excellent |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 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 | 15 |
| Mar | 15 |
| Apr | 17 |
| May | 20 |
| Jun | 23 |
| Jul | 25 |
| Aug | 26 |
| Sep | 25 |
| Oct | 23 |
| Nov | 20 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Baie de Chanteloube837 mHautes-Alpes
- Baie St Michel1.9 kmHautes-Alpes
- Camping la Presqu'Ile2.5 kmHautes-Alpes
- Colonie Jeunesse Avenir2.7 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.
- Bus stop: Chanteloube - Plage des Trémouilles, about ~130 m away.
Food, stays & town
- Nearest village: Le Sauze-du-Lac, about ~3.4 km 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).
- Families
- Water sports
- A quiet swim
Is the water clean at Le Grand Pre - Les Tremouilles?
Le Grand Pre - Les Tremouilles 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 Hautes-Alpes. You can park about ~130 m away.
That rating has been consistent: every one of the 10 classified seasons on record has come back Excellent or Good. 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. Le Sauze-du-Lac — the closest town — sits about ~3.4 km from here.
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. It's been a consistently reliable spot too — the rating has held at Excellent for 8 straight years.
Frequently asked questions
Is the water at Le Grand Pre - Les Tremouilles safe right now?
It's about as safe as bathing water gets: Le Grand Pre - Les Tremouilles's 2025 EU rating is Excellent, the top tier on the scale, and 10 of 10 classified seasons have come back Excellent or Good. It's also held steady at Excellent for 8 straight years.
How cold or warm is the water at Le Grand Pre - Les Tremouilles today?
That reading, around 22°C, is a placeholder rather than a live measurement, shown only because the marine-weather feed was temporarily unreachable; it updates automatically once the feed returns. That's the reading right off Hautes-Alpes.
What's the ideal time of year to swim at Le Grand Pre - Les Tremouilles?
July–September tends to be the sweet spot for swimming here, with sea temperatures usually peaking later in that stretch. That applies to the water around Hautes-Alpes.
How is the water quality rating measured?
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 Le Grand Pre - Les Tremouilles?
By car, it's easy — parking is right by the beach. By bus, the nearest stop is Chanteloube - Plage des Trémouilles, about ~130 m away. The nearest town is Le Sauze-du-Lac, about ~3.4 km away.