France · Ardèche
Water temperature at Le Lac de St Martial
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.
Water temperature
Next 7 days, °C
View as table
| Day | Water temp (°C) |
|---|---|
| Wed 2 | 23.0 |
| Thu 3 | 22.5 |
| Fri 4 | 22.0 |
| Sat 5 | 21.9 |
| Sun 6 | 22.3 |
| Mon 7 | 22.8 |
| Tue 8 | 23.1 |
Water temperature by month
Modeled climatology derived from latitude and season.
Typical vs. measured water temperature
12-month view, °C — modeled line vs. measured sample averages
View as table
| Month | Modeled (°C) | Measured avg. (°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 | — |
No measured in-season water temperature has been published for Le Lac de St Martial yet — the chart above shows the modeled climatology only. Some countries (Croatia, via IZOR) also record the water temperature at each official water sample; check the water quality page for this beach's sampling status.
Frequently asked questions
Is the water warm at Le Lac de St Martial today?
That ~23°C figure is a placeholder, not a live reading — Le Lac de St Martial's marine feed couldn't be reached, and it'll be swapped for the real value automatically once it responds again. That's the reading right off Ardèche.
Which month has the warmest water at Le Lac de St Martial?
For water above the comfortably-warm 22°C mark, target June–October — August is typically the high point of that window on the modeled curve. That applies to the water around Ardèche.
Is the water temperature chart above measured or estimated?
Estimated, not measured, for Le Lac de St Martial: the chart above models from latitude and season. Some national authorities (Croatia, via IZOR) additionally publish the water temperature at each official sample, shown alongside the modeled curve when that data exists.