France · Vosges
Sea temperature at Base de L'Union Nautique
Warm and pleasant for swimming
Sample dataUpdated 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
Sample dataModeled placeholder forecast for demonstration — will be replaced by a live marine-weather feed.
Sea temperature
Next 7 days, °C
View as table
| Day | Sea temp (°C) |
|---|---|
| Wed 2 | 25.4 |
| Thu 3 | 25.5 |
| Fri 4 | 25.2 |
| Sat 5 | 24.7 |
| Sun 6 | 24.4 |
| Mon 7 | 24.5 |
| Tue 8 | 25.0 |
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 | 24 | — |
| Aug | 25 | — |
| Sep | 24 | — |
| Oct | 22 | — |
| Nov | 19 | — |
| Dec | 17 | — |
No measured in-season sea temperature has been published for Base de L'Union Nautique 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 Base de L'Union Nautique right now?
That reading (~25°C) is a stand-in value rather than a live measurement — Base de L'Union Nautique's marine feed was temporarily unreachable, and it'll refresh automatically once the feed returns. That's the reading right off Vosges.
What's the best month to visit Base de L'Union Nautique for swimming?
Aim for June–October — the modeled water temperature typically clears 22°C in that window, the rule of thumb for comfortably warm swimming, with August usually the peak. That applies to the water around Vosges.
Is the sea temperature chart above measured or estimated?
Not currently for Base de L'Union Nautique — the chart above is a modeled estimate based on latitude and season rather than a measured average. A few countries (Croatia, via IZOR) do publish the sea temperature taken at each official water sample, and that's plotted alongside the modeled curve when it exists.