France · Loire-Atlantique
Sea temperature at Roche Marie
Pleasant for swimming
Updated hourly from the live marine forecast. See the 12-month typical range and, where available, real measured readings further down the page.
7-day outlook
7-day sea temperature forecast from Open-Meteo, refreshed hourly.
Sea temperature
Next 7 days, °C
View as table
| Day | Sea temp (°C) |
|---|---|
| Wed 2 | 21.9 |
| Thu 3 | 22.0 |
| Fri 4 | 22.2 |
| Sat 5 | 22.8 |
| Sun 6 | 22.7 |
| Mon 7 | 22.8 |
| Tue 8 | 22.6 |
Sea temperature by month
Modeled climatology derived from latitude and season.
Typical vs. measured sea temperature
12-month view, °C — modeled line vs. measured sample averages
View as table
| Month | Modeled (°C) | Measured avg. (°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 | — |
No measured in-season sea temperature has been published for Roche Marie yet — the chart above shows the modeled climatology only. Some countries (Croatia, via IZOR) also record the sea temperature at each official water sample; check the water quality page for this beach's sampling status.
Frequently asked questions
What's the current water temperature at Roche Marie?
Right now the water at Roche Marie is around 22°C, per the latest hourly update. Check the 7-day chart above for the trend, or the monthly chart below for how that compares to the seasonal norm. That's the reading right off Loire-Atlantique.
When does Roche Marie have the warmest water?
July–September, when the modeled water temperature is typically above 22°C — widely considered comfortably warm for swimming. August usually runs warmest. That applies to the water around Loire-Atlantique.
Is the sea temperature chart above measured or estimated?
Not yet for Roche Marie — the chart above shows a modeled estimate derived from latitude and season, not a measured average. Some countries (Croatia, via IZOR) also publish the sea temperature recorded at each official water sample; when that data exists for a beach it's plotted alongside the modeled curve.