Current sea water temperature:
+83.7°F
| Minimum sea water temperature in August: | 86.2°F |
| Maximum sea water temperature in August: | 81.5°F |
| Average sea water temperature in August: | 83.8°F |
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14 days
forecast
forecast
| St John's |
monthly
weather
weather
| St John's |
Sea water temperature for the last 10 days:
| August 9 | 83.7°F | August 4 | 84.2°F |
| August 8 | 84.0°F | August 3 | 83.7°F |
| August 7 | 84.0°F | August 2 | 84.0°F |
| August 6 | 83.8°F | August 1 | 83.5°F |
| August 5 | 83.8°F | July 31 | 83.8°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
August
August
| 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: 23:43
August 10, monday
0000
82°F
W
17 mph
17 mph
0300
82°F
W
16 mph
16 mph
0600
82°F
W
14 mph
14 mph
0900
82°F
W
14 mph
14 mph
1200
84°F
W
14 mph
14 mph
1500
84°F
W
13 mph
13 mph
1800
82°F
W
15 mph
15 mph
2100
82°F
W
14 mph
14 mph
