Measurements:
°C
°F
CURRENT WEATHER
03:10
Rennes
50°F
E 7 mph
Feels like: 46°F
Precip: 12%
World Resorts France Rennes Weather

14 Day Weather Forecast

09.09
wed
DAY
68°F
SE 9 mph
precip
17%
NIGHT
52°F
S 5 mph
precip
23%
09.10
thu
DAY
66°F
N 2 mph
precip
11%
NIGHT
56°F
E 5 mph
precip
23%
09.11
fri
DAY
68°F
NE 6 mph
precip
22%
NIGHT
62°F
S 7 mph
precip
29%
09.12
sat
DAY
74°F
NE 4 mph
precip
11%
NIGHT
60°F
S 7 mph
precip
10%
09.13
sun
DAY
78°F
E 5 mph
precip
6%
NIGHT
68°F
S 6 mph
precip
24%
09.14
mon
DAY
78°F
S 6 mph
precip
4%
NIGHT
64°F
S 8 mph
precip
15%
09.15
tue
DAY
80°F
W 7 mph
precip
2%
NIGHT
72°F
W 5 mph
precip
3%
09.16
wed
DAY
84°F
NE 6 mph
precip
4%
NIGHT
56°F
SE 7 mph
precip
13%
09.17
thu
DAY
68°F
E 11 mph
precip
9%
NIGHT
60°F
SE 7 mph
precip
12%
09.18
fri
DAY
70°F
SE 4 mph
precip
3%
NIGHT
64°F
SW 9 mph
precip
1%
09.19
sat
DAY
76°F
W 11 mph
precip
1%
NIGHT
64°F
W 7 mph
precip
1%
09.20
sun
DAY
80°F
W 6 mph
precip
0%
NIGHT
64°F
S 8 mph
precip
2%
09.21
mon
DAY
80°F
SW 12 mph
precip
1%
NIGHT
64°F
SW 15 mph
precip
9%
09.22
tue
DAY
74°F
SW 14 mph
precip
2%
NIGHT
70°F
SW 16 mph
precip
4%

Rennes Sea Water Temperature in September, °F

Select Year: 2025 2024 2023

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.

Rennes on the Weather Map

Best Time to Visit Rennes
The most sunny months:
July 13 days
August 12 days
September 11 days
The most warm months:
July 77.3 °F
August 77.2 °F
June 72.5 °F
Warmest sea temperature:
August 67.8 °F
September 66.5 °F
July 65.9 °F
The most cold months:
January 45.8 °F
February 48.0 °F
December 48.5 °F
The most rainy months:
June 5 days
November 3 days
April 3 days
The most windy months:
February 11 mph
December 11 mph
January 10 mph
more details
France Resorts:
NAME
F°
Antibes +78
Arcachon +68
Cannes +78
Corsica +78
Deauville +58
Etretat +64
Marseilles +82
Menton +80
Montpellier +78
Nice +74
Paris +60
Perpignan +74
Saint-Tropez +82
Toulon +82
Toulouse +68
all resorts
24 Hours Weather Forecast
Rennes
Local time: 03:10
09 sep, wednesday
0600 50°F
E
7 mph
0900 54°F
E
7 mph
1200 68°F
SE
9 mph
1500 68°F
SE
11 mph
1800 68°F
S
11 mph
2100 58°F
SW
7 mph
10 sep, thursday
0000 52°F
S
5 mph
0300 50°F
SW
2 mph