Current sea water temperature:
+35.8°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: | 38.4°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 29 | 35.8°F | December 24 | 35.8°F |
| December 28 | 35.4°F | December 23 | 35.8°F |
| December 27 | 36.1°F | December 22 | 36.5°F |
| December 26 | 36.1°F | December 21 | 36.3°F |
| December 25 | 36.1°F | December 20 | 36.0°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
January
January
| 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: 04:28
December 29, monday
0600
32°F
S
15 mph
15 mph
0900
32°F
S
19 mph
19 mph
1200
34°F
S
22 mph
22 mph
1500
34°F
S
17 mph
17 mph
1800
34°F
S
11 mph
11 mph
2100
34°F
SE
6 mph
6 mph
December 30, tuesday
0000
34°F
SE
6 mph
6 mph
0300
34°F
S
6 mph
6 mph
