Current sea water temperature:
+40.1°F
| Minimum sea water temperature in December: | 49.1°F |
| Maximum sea water temperature in December: | 36.3°F |
| Average sea water temperature in December: | 42.5°F |
| more information | |
14 days
forecast
forecast
| Montreal |
monthly
weather
weather
| Montreal |
Sea water temperature for the last 10 days:
| December 23 | 40.1°F | December 18 | 41.5°F |
| December 22 | 40.6°F | December 17 | 41.5°F |
| December 21 | 41.4°F | December 16 | 41.5°F |
| December 20 | 41.4°F | December 15 | 41.5°F |
| December 19 | 41.4°F | December 14 | 41.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Montreal?
Based on the data about daily sea water temperature for the last three years the warmest sea in Montreal was noticed in July, August and September.
Monthly Sea Temperatures in Montreal, °F
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 75.8°F. The highest and lowest sea temperatures during the month were 79.2°F and 71.8°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 74.7°F. The highest and lowest sea temperatures during the month were 79.2°F and 68.7°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 66.7°F. The highest and lowest sea temperatures during the month were 69.6°F and 64.2°F.
current
weather
weather
| Montreal |
weather in
December
December
| Montreal |
Best time for vacation in Montreal
Montreal on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Montreal
Local time: 12:35
December 23, tuesday
1500
18°F
SW
9 mph
9 mph
1800
21°F
SW
9 mph
9 mph
2100
23°F
SW
6 mph
6 mph
December 24, wednesday
0000
25°F
SW
2 mph
2 mph
0300
25°F
SE
9 mph
9 mph
0600
25°F
SE
8 mph
8 mph
0900
27°F
S
7 mph
7 mph
1200
27°F
S
7 mph
7 mph
