Current sea water temperature:
+36.9°F
| Minimum sea water temperature in May: | 42.8°F |
| Maximum sea water temperature in May: | 32.2°F |
| Average sea water temperature in May: | 36.9°F |
| more information | |
14 days
forecast
forecast
| St. John's |
monthly
weather
weather
| St. John's |
Sea water temperature for the last 10 days:
| May 17 | 36.9°F | May 12 | 35.1°F |
| May 16 | 36.0°F | May 11 | 36.3°F |
| May 15 | 36.3°F | May 10 | 35.4°F |
| May 14 | 34.5°F | May 9 | 35.1°F |
| May 13 | 35.1°F | May 8 | 36.1°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 57.9°F. The highest and lowest sea temperatures during the month were 60.6°F and 55.6°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 56.1°F. The highest and lowest sea temperatures during the month were 58.5°F and 54.0°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 53.0°F. The highest and lowest sea temperatures during the month were 57.7°F and 47.3°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
Places in Canada:
Name
°F
24 Hours Forecast
St. John's
Local time: 16:56
May 17, sunday
1800
52°F
NE
17 mph
17 mph
2100
46°F
E
16 mph
16 mph
May 18, monday
0000
46°F
E
17 mph
17 mph
0300
45°F
E
17 mph
17 mph
0600
45°F
E
15 mph
15 mph
0900
45°F
SE
14 mph
14 mph
1200
48°F
SE
14 mph
14 mph
1500
45°F
S
14 mph
14 mph
