France · Finistère
Sea temperature at Greve Blanche
Cool but swimmable
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 | 19.1 |
| Thu 3 | 19.6 |
| Fri 4 | 19.5 |
| Sat 5 | 20.4 |
| Sun 6 | 20.0 |
| Mon 7 | 19.8 |
| Tue 8 | 19.6 |
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 Greve Blanche 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
How warm is the sea at Greve Blanche right now?
The latest hourly reading has Greve Blanche's sea at around 19°C — the 7-day chart above shows the short-term trend, and the monthly chart further down shows what's typical for this time of year. That's the reading right off Finistère.
What's the best month to visit Greve Blanche for swimming?
For water above the comfortably-warm 22°C mark, target July–September — August is typically the high point of that window on the modeled curve. That applies to the water around Finistère.
Is the sea temperature chart above measured or estimated?
Estimated, not measured, for Greve Blanche: the chart above models from latitude and season. Some national authorities (Croatia, via IZOR) additionally publish the sea temperature at each official sample, shown alongside the modeled curve when that data exists.