Current sea water temperature:
+41.5°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 14 | 41.5°F | December 9 | 43.7°F |
| December 13 | 41.9°F | December 8 | 44.1°F |
| December 12 | 42.4°F | December 7 | 44.4°F |
| December 11 | 42.8°F | December 6 | 44.4°F |
| December 10 | 43.2°F | December 5 | 44.4°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: 21:33
December 15, monday
0000
12°F
E
10 mph
10 mph
0300
14°F
E
9 mph
9 mph
0600
14°F
E
9 mph
9 mph
0900
16°F
E
8 mph
8 mph
1200
18°F
E
10 mph
10 mph
1500
18°F
E
11 mph
11 mph
1800
18°F
E
9 mph
9 mph
2100
19°F
NE
4 mph
4 mph
