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 | 20.6 | 0.4 |
| Thu 3 | 20.6 | 0.5 |
| Fri 4 | 20.7 | 0.6 |
| Sat 5 | 21.0 | 0.2 |
| Sun 6 | 21.1 | 0.3 |
| Mon 7 | 21.1 | 0.3 |
| Tue 8 | 20.9 | 0.5 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Sufficient2015
- 2016: Good2016
- 2017: Sufficient2017
- 2018: Sufficient2018
- 2019: Good2019
- 2020: Good2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Excellent2025
Excellent in the most recent season, and 8 of 11 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Sufficient |
| 2016 | Good |
| 2017 | Sufficient |
| 2018 | Sufficient |
| 2019 | Good |
| 2020 | Good |
| 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 | 14 |
| Mar | 14 |
| Apr | 16 |
| May | 19 |
| Jun | 21 |
| Jul | 23 |
| Aug | 24 |
| Sep | 23 |
| Oct | 22 |
| Nov | 19 |
| Dec | 17 |
Location & nearby beaches
Nearby beaches
- Monument Leclerc3.4 kmManche
- Face Au Cd4.7 kmManche
- RAVENOVILLE Les dunes7.5 kmManche
- Les Gougins10 kmManche
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- By car: there's parking about ~380 m from the beach.
Food, stays & town
- Nearest village: Saint-Martin-de-Varreville, about ~4.2 km away.
- 2 places to stay mapped nearby Closest is Camping Paradis Utah Beach, about ~280 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 La Grande Dune?
La Grande Dune is a coastal bathing site with an official EU Bathing Water rating of Excellent for the 2025 season — the highest official classification under the EU bathing-water assessment. That annual classification comes from the EU Bathing Water Directive: national authorities test for two indicator bacteria, intestinal enterococci and E. coli, throughout the bathing season, then report the full-season results to the European Environment Agency (EEA) the following spring — the 2025 season's rating was published in spring 2026, and the 2026 season won't be rated 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. There's parking about ~380 m from the beach.
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. Over the 11 classified seasons on record, 8 have come back Excellent or Good — a track record worth checking each year rather than assuming. The nearest town, Saint-Martin-de-Varreville, is about ~4.2 km away.
Worth remembering: “Excellent” isn't a live reading, it's an annual grade — Excellent, Good, Sufficient or Poor — set once a year from that season's water samples and describing the average, not this afternoon's conditions. For what the sea is doing right now, check the “Right now” panel and 7-day outlook above. It sits in Manche.
Frequently asked questions
Is La Grande Dune safe to swim in?
La Grande Dune is rated Excellent for 2025 — the top EU Bathing Water classification — with 8 of 11 classified seasons rating Excellent or Good, so yes. It's also held steady at Excellent for 5 straight years.
What is the sea temperature at La Grande Dune today?
La Grande Dune's sea temperature currently sits at around 21°C, based on the latest update — check the “Right now” panel above for the full live picture. That's the reading right off Manche. On the modeled climatology here, August usually runs warmest.
When should you plan a swimming trip to La Grande Dune?
If you're planning around water temperature, July–September is the window to target — the modeled sea temperature is typically highest then. That applies to the water around Manche. Within that window, August is typically the single warmest month.
How is bathing water quality actually assessed?
Once a year, national authorities report a full season of testing for intestinal enterococci and E. coli to the European Environment Agency, which grades the season Excellent, Good, Sufficient or Poor under the EU Bathing Water Directive. A handful of countries, including Croatia via IZOR, also publish individual in-season samples ahead of that report — La Grande Dune doesn't have that feed set up yet.
Is there parking near La Grande Dune?
By car, there's parking about ~380 m from the beach. The nearest town is Saint-Martin-de-Varreville, about ~4.2 km away.