France · Somme
Sea temperature at Plage Surveillee de Fort-Mahon
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 | 20.4 |
| Thu 3 | 20.3 |
| Fri 4 | 20.5 |
| Sat 5 | 20.6 |
| Sun 6 | 20.6 |
| Mon 7 | 20.6 |
| Tue 8 | 20.5 |
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 | 14 | — |
| Feb | 13 | — |
| Mar | 14 | — |
| Apr | 16 | — |
| May | 19 | — |
| Jun | 22 | — |
| Jul | 24 | — |
| Aug | 25 | — |
| Sep | 24 | — |
| Oct | 22 | — |
| Nov | 19 | — |
| Dec | 16 | — |
No measured in-season sea temperature has been published for Plage Surveillee de Fort-Mahon 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 temperature is the sea at Plage Surveillee de Fort-Mahon right now?
As of the latest hourly update, the sea at Plage Surveillee de Fort-Mahon is around 20°C. See the 7-day chart above for how it's trending, and the monthly chart further down for what's typical this time of year. That's the reading right off Somme.
When should you plan a swimming trip to Plage Surveillee de Fort-Mahon?
The modeled climatology puts the comfortably-warm window (above 22°C) at June–October, with August typically the warmest point in that stretch. That applies to the water around Somme.
Is the sea temperature chart above measured or estimated?
For Plage Surveillee de Fort-Mahon, the chart above shows a modeled estimate only, derived from latitude and season — no measured average yet. Some countries, Croatia's IZOR among them, also record the sea temperature at each official sample, plotted alongside the model where available.