Current Sea Water Temperature:
+50.2°F
| Maximum Sea Water Temperature in March: | 50.2°F |
| Minimum Sea Water Temperature in March: | 43.4°F |
| Average water temperature in March: | 47.5°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| March 10 | 50.2°F | March 05 | 49.8°F |
| March 09 | 50.0°F | March 04 | 49.8°F |
| March 08 | 49.8°F | March 03 | 49.4°F |
| March 07 | 49.6°F | March 02 | 49.6°F |
| March 06 | 49.6°F | March 01 | 50.0°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°
| Antibes |  |
+54 |
| Biarritz |  |
+54 |
| Bordeaux |  |
+60 |
| Cannes | |
+56 |
| Chamonix | |
+36 |
| Corsica |  |
+60 |
| Etretat | |
+50 |
| Marseilles | |
+60 |
| Menton | |
+54 |
| Montpellier | |
+58 |
| Nice | |
+52 |
| Paris | |
+58 |
| Perpignan | |
+58 |
| Saint-Tropez | |
+56 |
| Toulouse | |
+58 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Rennes
Local time: 11:06
10 mar, tuesday
| 1200 |  |
54°F | NE 9 mph |
| 1500 | |
56°F | NE 13 mph |
| 1800 |  |
52°F | NE 12 mph |
| 2100 | |
46°F | NE 11 mph |
11 mar, wednesday
| 0000 | |
48°F | NE 15 mph |
| 0300 |  |
48°F | NE 19 mph |
| 0600 | |
52°F | NE 14 mph |
| 0900 | |
52°F | SE 11 mph |