Current sea water temperature:
+68.7°F
| Minimum sea water temperature in August: | 68.7°F |
| Maximum sea water temperature in August: | 63.1°F |
| Average sea water temperature in August: | 65.9°F |
| more information | |
14 days
forecast
forecast
| Rennes |
monthly
weather
weather
| Rennes |
Sea water temperature for the last 10 days:
| August 5 | 68.7°F | July 31 | 68.4°F |
| August 4 | 68.5°F | July 30 | 68.4°F |
| August 3 | 68.2°F | July 29 | 68.2°F |
| August 2 | 68.5°F | July 28 | 67.5°F |
| August 1 | 68.0°F | July 27 | 68.0°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 67.2°F. The highest and lowest sea temperatures during the month were 68.9°F and 64.9°F.
current
weather
weather
| Rennes |
weather in
August
August
| Rennes |
Best time for vacation in Rennes
Rennes on a weather map
Places in France:
Name
°F
24 Hours Forecast
Rennes
Local time: 22:51
August 06, thursday
0000
55°F
SE
7 mph
7 mph
0300
54°F
SE
6 mph
6 mph
0600
54°F
SE
6 mph
6 mph
0900
61°F
S
7 mph
7 mph
1200
72°F
S
8 mph
8 mph
1500
77°F
S
13 mph
13 mph
1800
75°F
S
14 mph
14 mph
2100
64°F
S
12 mph
12 mph
