France · Yonne
Sea temperature at Tonnerre - la Cascade
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 | 24.3 |
| Thu 3 | 24.1 |
| Fri 4 | 23.6 |
| Sat 5 | 23.1 |
| Sun 6 | 23.1 |
| Mon 7 | 23.5 |
| Tue 8 | 24.0 |
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 | 20 | — |
| Jun | 22 | — |
| Jul | 24 | — |
| Aug | 25 | — |
| Sep | 24 | — |
| Oct | 22 | — |
| Nov | 20 | — |
| Dec | 17 | — |
No measured in-season sea temperature has been published for Tonnerre - la Cascade 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 is the sea temperature at Tonnerre - la Cascade today?
Treat the ~24°C above as illustrative only: the live marine feed for Tonnerre - la Cascade was unreachable when this page was built, and the figure updates automatically once it's back. That's the reading right off Yonne.
When does Tonnerre - la Cascade have the warmest water?
June–October, 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 Yonne.
Is the sea temperature chart above measured or estimated?
Not yet for Tonnerre - la Cascade — 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.