World Resorts France Rennes Weather

Rennes 14 Days Forecast

26.08
wed
Day
75°F
N 9 mph
Precip.
13%
Night
61°F
NW 11 mph
Precip.
58%
27.08
thu
Day
73°F
NE 9 mph
Precip.
14%
Night
59°F
E 7 mph
Precip.
27%
28.08
fri
Day
72°F
NE 14 mph
Precip.
11%
Night
61°F
E 12 mph
Precip.
11%
29.08
sat
Day
66°F
NE 17 mph
Precip.
19%
Night
61°F
NE 9 mph
Precip.
34%
30.08
sun
Day
72°F
N 11 mph
Precip.
18%
Night
59°F
NE 12 mph
Precip.
14%
31.08
mon
Day
72°F
E 16 mph
Precip.
2%
Night
59°F
W 4 mph
Precip.
14%
01.09
tue
Day
70°F
E 3 mph
Precip.
2%
Night
59°F
NE 9 mph
Precip.
27%
02.09
wed
Day
70°F
NW 9 mph
Precip.
10%
Night
57°F
NW 6 mph
Precip.
14%
03.09
thu
Day
72°F
W 2 mph
Precip.
4%
Night
61°F
E 6 mph
Precip.
14%
04.09
fri
Day
73°F
NE 14 mph
Precip.
10%
Night
61°F
E 6 mph
Precip.
84%
05.09
sat
Day
63°F
NE 7 mph
Precip.
28%
Night
55°F
NE 11 mph
Precip.
13%
06.09
sun
Day
66°F
E 16 mph
Precip.
4%
Night
55°F
E 10 mph
Precip.
11%
07.09
mon
Day
66°F
NE 12 mph
Precip.
4%
Night
55°F
E 6 mph
Precip.
28%
08.09
tue
Day
64°F
E 11 mph
Precip.
4%
Night
59°F
SW 5 mph
Precip.
14%

Sea water temperature in August, °F

Show year:
2026
2025
2024

The average sea water temperature in August of 2026 was 68.8°F. The highest and lowest sea temperatures during the month were 70.2°F and 67.3°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.

Air temperature in Rennes, °F

Precipitation total in Rennes, in.

* Charts above show average data for the last 3 years.

Best time for vacation in Rennes

Sunniest months:
July 13 days
August 12 days
September 11 days
Warmest months:
July 74.6 °F
August 74.1 °F
June 70.2 °F
Warmest sea temp:
August 66.1 °F
September 64.8 °F
July 64.3 °F
Coldest months:
January 46.2 °F
February 48.2 °F
December 48.6 °F
Rainiest months:
June 5 days
November 3 days
April 3 days
Windiest months:
February 11.1 mph
December 10.8 mph
January 10.5 mph

Rennes on a weather map

Current weather
02:55
Rennes
+59°F
NE 6 mph
Feels like: +59°F
Precip.: 20%
Places in France:
Name
°F
Antibes
+77°F
Arcachon
+68°F
Deauville
+63°F
Cannes
+77°F
Corsica
+75°F
Marseilles
+75°F
Menton
+75°F
Montpellier
+75°F
Nice
+72°F
Paris
+68°F
Perpignan
+77°F
Saint-Tropez
+77°F
Toulon
+75°F
Toulouse
+72°F
Etretat
+66°F
all places
24 Hours Forecast
Rennes
Local time: 02:55
August 26, wednesday
0300
59°F
NE
6 mph
0600
59°F
NE
4 mph
0900
64°F
N
7 mph
1200
75°F
N
9 mph
1500
73°F
N
8 mph
1800
73°F
SW
2 mph
2100
63°F
W
9 mph
August 27, thursday
0000
61°F
NW
11 mph
Units of measurement: °C / °F