26.08
wed
wed
Day
72°F
SE 8 mph
Precip.
18%
18%
Night
63°F
E 6 mph
Precip.
13%
13%
27.08
thu
thu
Day
75°F
E 8 mph
Precip.
1%
1%
Night
61°F
E 8 mph
Precip.
9%
9%
28.08
fri
fri
Day
75°F
E 7 mph
Precip.
2%
2%
Night
59°F
NE 6 mph
Precip.
17%
17%
29.08
sat
sat
Day
70°F
NE 12 mph
Precip.
16%
16%
Night
64°F
E 11 mph
Precip.
40%
40%
30.08
sun
sun
Day
64°F
E 12 mph
Precip.
12%
12%
Night
55°F
N 4 mph
Precip.
23%
23%
31.08
mon
mon
Day
68°F
N 12 mph
Precip.
3%
3%
Night
54°F
NE 14 mph
Precip.
20%
20%
01.09
tue
tue
Day
59°F
SE 15 mph
Precip.
22%
22%
Night
50°F
SE 12 mph
Precip.
18%
18%
sea water
temperature
temperature
| St. John's |
monthly
weather
weather
| St. John's |
current
weather
weather
| St. John's |
14 days
forecast
forecast
| St. John's |
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 56.3°F. The highest and lowest sea temperatures during the month were 59.7°F and 53.2°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.
Air temperature in St. John's, °F
Precipitation total in St. John's, in.
* Charts above show average data for the last 3 years.
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: 14:29
August 26, wednesday
1500
77°F
SE
5 mph
5 mph
1800
72°F
NE
4 mph
4 mph
2100
66°F
E
7 mph
7 mph
August 27, thursday
0000
63°F
E
6 mph
6 mph
0300
61°F
E
7 mph
7 mph
0600
59°F
E
7 mph
7 mph
0900
68°F
E
9 mph
9 mph
1200
75°F
E
8 mph
8 mph
