Current sea water temperature:
+55.9°F
| Minimum sea water temperature in August: | 64.9°F |
| Maximum sea water temperature in August: | 53.2°F |
| Average sea water temperature in August: | 59.1°F |
| more information | |
14 days
forecast
forecast
| St. John's |
monthly
weather
weather
| St. John's |
Sea water temperature for the last 10 days:
| August 6 | 55.9°F | August 1 | 53.2°F |
| August 5 | 55.8°F | July 31 | 54.0°F |
| August 4 | 54.9°F | July 30 | 51.6°F |
| August 3 | 55.6°F | July 29 | 54.3°F |
| August 2 | 54.7°F | July 28 | 54.7°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 51.1°F. The highest and lowest sea temperatures during the month were 55.9°F and 46.6°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
Places in Canada:
Name
°F
24 Hours Forecast
St. John's
Local time: 12:03
August 06, thursday
1500
57°F
S
17 mph
17 mph
1800
55°F
S
17 mph
17 mph
2100
55°F
S
15 mph
15 mph
August 07, friday
0000
55°F
S
11 mph
11 mph
0300
55°F
S
12 mph
12 mph
0600
55°F
S
11 mph
11 mph
0900
55°F
S
14 mph
14 mph
1200
57°F
S
16 mph
16 mph
