Current sea water temperature:
+81.5°F
| Minimum sea water temperature in December: | 84.7°F |
| Maximum sea water temperature in December: | 79.9°F |
| Average sea water temperature in December: | 81.7°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 20 | 81.5°F | December 15 | 81.7°F |
| December 19 | 81.7°F | December 14 | 81.9°F |
| December 18 | 81.7°F | December 13 | 81.5°F |
| December 17 | 81.7°F | December 12 | 81.5°F |
| December 16 | 81.7°F | December 11 | 81.7°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 September, October and August.
Monthly Sea Temperatures in St John's, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 85.4°F. The highest and lowest sea temperatures during the month were 85.8°F and 84.9°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 84.8°F. The highest and lowest sea temperatures during the month were 85.8°F and 83.8°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 84.7°F. The highest and lowest sea temperatures during the month were 85.5°F and 84.2°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
24 Hours Forecast
St John's
Local time: 00:08
December 21, sunday
0300
79°F
W
17 mph
17 mph
0600
79°F
W
17 mph
17 mph
0900
79°F
W
19 mph
19 mph
1200
81°F
W
17 mph
17 mph
1500
81°F
W
19 mph
19 mph
1800
79°F
W
17 mph
17 mph
2100
79°F
W
17 mph
17 mph
December 22, monday
0000
79°F
W
15 mph
15 mph
