Current sea water temperature:
+82.0°F
| Minimum sea water temperature in May: | 85.1°F |
| Maximum sea water temperature in May: | 79.7°F |
| Average sea water temperature in May: | 81.6°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:
| May 18 | 82.0°F | May 13 | 82.2°F |
| May 17 | 82.4°F | May 12 | 82.2°F |
| May 16 | 82.2°F | May 11 | 82.2°F |
| May 15 | 82.2°F | May 10 | 82.2°F |
| May 14 | 82.4°F | May 9 | 82.4°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
May
May
| 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: 22:10
May 19, tuesday
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79°F
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22 mph
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0300
79°F
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21 mph
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0600
79°F
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0900
81°F
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22 mph
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1200
81°F
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22 mph
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1500
81°F
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21 mph
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1800
81°F
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20 mph
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2100
81°F
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21 mph
21 mph
