Current sea water temperature:
+54.1°F
| Minimum sea water temperature in April: | 55.2°F |
| Maximum sea water temperature in April: | 44.6°F |
| Average sea water temperature in April: | 51.0°F |
| more information | |
14 days
forecast
forecast
| Rennes |
monthly
weather
weather
| Rennes |
Sea water temperature for the last 10 days:
| April 26 | 54.1°F | April 21 | 53.8°F |
| April 25 | 54.7°F | April 20 | 53.6°F |
| April 24 | 54.3°F | April 19 | 53.6°F |
| April 23 | 54.0°F | April 18 | 52.9°F |
| April 22 | 54.0°F | April 17 | 53.1°F |
Monthly sea water temperature, °F
When is the warmest sea in Rennes?
Based on the data about daily sea water temperature for the last three years the warmest sea in Rennes was noticed in August, September and July.
Monthly Sea Temperatures in Rennes, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 67.3°F. The highest and lowest sea temperatures during the month were 68.2°F and 65.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 64.9°F. The highest and lowest sea temperatures during the month were 66.9°F and 62.8°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 65.6°F. The highest and lowest sea temperatures during the month were 66.7°F and 63.7°F.
current
weather
weather
| Rennes |
weather in
May
May
| Rennes |
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 23:28
April 27, monday
0000
55°F
W
5 mph
5 mph
0300
52°F
W
5 mph
5 mph
0600
52°F
SW
4 mph
4 mph
0900
55°F
SW
4 mph
4 mph
1200
63°F
SW
7 mph
7 mph
1500
68°F
SW
8 mph
8 mph
1800
68°F
SW
9 mph
9 mph
2100
57°F
SW
9 mph
9 mph
