France · Côtes-d'Armor
Sea temperature at Le Guen-Lanruen
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 | 20.9 |
| Thu 3 | 21.0 |
| Fri 4 | 21.0 |
| Sat 5 | 21.2 |
| Sun 6 | 21.3 |
| Mon 7 | 21.2 |
| Tue 8 | 21.0 |
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 | 16 | — |
| May | 19 | — |
| Jun | 21 | — |
| Jul | 23 | — |
| Aug | 24 | — |
| Sep | 23 | — |
| Oct | 22 | — |
| Nov | 19 | — |
| Dec | 17 | — |
No measured in-season sea temperature has been published for Le Guen-Lanruen 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
Is the sea warm at Le Guen-Lanruen today?
The latest hourly reading has Le Guen-Lanruen's sea at around 21°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 Côtes-d'Armor.
What's the ideal time of year to swim at Le Guen-Lanruen?
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 Côtes-d'Armor.
Is the sea temperature chart above measured or estimated?
Estimated, not measured, for Le Guen-Lanruen: 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.