Current sea water temperature:
+82.8°F
| Minimum sea water temperature in June: | 85.8°F |
| Maximum sea water temperature in June: | 80.1°F |
| Average sea water temperature in June: | 82.5°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:
| June 28 | 82.8°F | June 23 | 82.8°F |
| June 27 | 82.8°F | June 22 | 82.6°F |
| June 26 | 82.2°F | June 21 | 82.6°F |
| June 25 | 82.2°F | June 20 | 82.6°F |
| June 24 | 82.6°F | June 19 | 82.8°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
July
July
| 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: 11:26
June 28, sunday
1200
82°F
W
17 mph
17 mph
1500
82°F
W
16 mph
16 mph
1800
81°F
W
14 mph
14 mph
2100
81°F
W
16 mph
16 mph
June 29, monday
0000
81°F
W
17 mph
17 mph
0300
81°F
W
16 mph
16 mph
0600
81°F
W
19 mph
19 mph
0900
81°F
W
17 mph
17 mph
