Current sea water temperature:
+85.1°F
| Minimum sea water temperature in September: | 87.4°F |
| Maximum sea water temperature in September: | 82.0°F |
| Average sea water temperature in September: | 84.6°F |
| more information | |
14 days
forecast
forecast
| St John's |
monthly
weather
weather
| St John's |
Sea water temperature for the last 10 days:
| September 19 | 85.1°F | September 14 | 84.7°F |
| September 18 | 84.7°F | September 13 | 85.1°F |
| September 17 | 84.9°F | September 12 | 84.9°F |
| September 16 | 85.1°F | September 11 | 84.9°F |
| September 15 | 84.7°F | September 10 | 85.1°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 September, October and August.
Monthly Sea Temperatures in St John's, °F
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 84.9°F. The highest and lowest sea temperatures during the month were 85.3°F and 84.4°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 84.2°F. The highest and lowest sea temperatures during the month were 84.9°F and 83.5°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
24 Hours Forecast
St John's
Local time: 05:44
September 19, saturday
0600
81°F
W
9 mph
9 mph
0900
82°F
NW
9 mph
9 mph
1200
84°F
NW
11 mph
11 mph
1500
84°F
W
9 mph
9 mph
1800
82°F
W
11 mph
11 mph
2100
82°F
W
11 mph
11 mph
September 20, sunday
0000
82°F
W
11 mph
11 mph
0300
81°F
W
9 mph
9 mph
