Current sea water temperature:
+39.9°F
| Minimum sea water temperature in December: | 43.0°F |
| Maximum sea water temperature in December: | 34.7°F |
| Average sea water temperature in December: | 38.6°F |
| more information | |
14 days
forecast
forecast
| St. John's |
monthly
weather
weather
| St. John's |
Sea water temperature for the last 10 days:
| December 5 | 39.9°F | November 30 | 41.5°F |
| December 4 | 40.1°F | November 29 | 40.1°F |
| December 3 | 41.2°F | November 28 | 41.7°F |
| December 2 | 41.0°F | November 27 | 41.9°F |
| December 1 | 41.5°F | November 26 | 42.4°F |
Monthly sea water temperature, °F
When is the warmest sea in St. John's?
Based on the data about daily sea water temperature for the last three years the warmest sea in St. John's was noticed in August, September and July.
Monthly Sea Temperatures in St. John's, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 57.9°F. The highest and lowest sea temperatures during the month were 60.6°F and 55.6°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 56.1°F. The highest and lowest sea temperatures during the month were 58.5°F and 54.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 53.0°F. The highest and lowest sea temperatures during the month were 57.7°F and 47.3°F.
current
weather
weather
| St. John's |
weather in
December
December
| St. John's |
Best time for vacation in St. John's
St. John's on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
St. John's
Local time: 04:57
December 05, friday
0600
37°F
NW
17 mph
17 mph
0900
36°F
NW
16 mph
16 mph
1200
27°F
E
34 mph
34 mph
1500
21°F
E
31 mph
31 mph
1800
21°F
E
34 mph
34 mph
2100
23°F
E
40 mph
40 mph
December 06, saturday
0000
23°F
E
40 mph
40 mph
0300
21°F
E
39 mph
39 mph
