Current sea water temperature:
+57.4°F
| Minimum sea water temperature in September: | 64.0°F |
| Maximum sea water temperature in September: | 51.8°F |
| Average sea water temperature in September: | 57.2°F |
| more information | |
14 days
forecast
forecast
| St. John's |
monthly
weather
weather
| St. John's |
Sea water temperature for the last 10 days:
| September 15 | 57.4°F | September 10 | 57.9°F |
| September 14 | 57.2°F | September 9 | 58.1°F |
| September 13 | 57.6°F | September 8 | 58.6°F |
| September 12 | 57.7°F | September 7 | 58.3°F |
| September 11 | 57.0°F | September 6 | 60.1°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 57.0°F. The highest and lowest sea temperatures during the month were 61.3°F and 53.2°F.
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 58.9°F. The highest and lowest sea temperatures during the month were 60.8°F and 57.0°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 51.1°F. The highest and lowest sea temperatures during the month were 55.9°F and 46.6°F.
current
weather
weather
| St. John's |
weather in
September
September
| 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: 15:09
September 15, tuesday
1800
54°F
SW
8 mph
8 mph
2100
52°F
SW
9 mph
9 mph
September 16, wednesday
0000
52°F
W
9 mph
9 mph
0300
52°F
W
8 mph
8 mph
0600
54°F
W
6 mph
6 mph
0900
55°F
S
3 mph
3 mph
1200
61°F
SE
4 mph
4 mph
1500
66°F
NE
4 mph
4 mph
