Current Sea Water Temperature:
+51.0°F
| Maximum Sea Water Temperature in March: | 51.0°F |
| Minimum Sea Water Temperature in March: | 43.4°F |
| Average water temperature in March: | 47.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| March 30 | 51.0°F | March 25 | 51.0°F |
| March 29 | 51.0°F | March 24 | 50.6°F |
| March 28 | 51.0°F | March 23 | 50.6°F |
| March 27 | 50.6°F | March 22 | 50.8°F |
| March 26 | 50.8°F | March 21 | 50.4°F |
When is the Warmest Sea for Rennes?
According to our data for the last three years for Rennes the highest average sea water temperature was in August, September and July.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Rennes was 69.2°F. The maximum and minimum values were 67.4°F and 70.2°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Rennes was 66.6°F. The maximum and minimum values were 64.2°F and 68.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Rennes was 67.4°F. The maximum and minimum values were 65.2°F and 68.6°F respectively.
France Resorts:
NAME
F°
| Annecy |  |
+38 |
| Antibes |  |
+56 |
| Biarritz | |
+54 |
| Bordeaux |  |
+54 |
| Cannes | |
+56 |
| Chamonix |  |
+22 |
| Corsica | |
+46 |
| Etretat | |
+50 |
| Marseilles | |
+52 |
| Menton | |
+58 |
| Montpellier |  |
+52 |
| Nice | |
+54 |
| Paris | |
+50 |
| Saint-Tropez | |
+58 |
| Toulouse | |
+48 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Rennes
Local time: 20:44
30 mar, monday
| 2100 |  |
48°F | S 13 mph |
31 mar, tuesday
| 0000 |  |
46°F | SE 11 mph |
| 0300 | |
42°F | SE 6 mph |
| 0600 | |
40°F | SE 6 mph |
| 0900 | |
44°F | SE 6 mph |
| 1200 |  |
52°F | S 9 mph |
| 1500 |  |
58°F | SE 10 mph |
| 1800 | |
58°F | SE 13 mph |