19.07
sun
sun
Day
82°F
W 18 mph
Precip.
16%
16%
Night
81°F
W 20 mph
Precip.
20%
20%
20.07
mon
mon
Day
82°F
W 14 mph
Precip.
18%
18%
Night
81°F
W 11 mph
Precip.
9%
9%
21.07
tue
tue
Day
82°F
W 11 mph
Precip.
17%
17%
Night
81°F
NW 16 mph
Precip.
16%
16%
22.07
wed
wed
Day
82°F
W 16 mph
Precip.
6%
6%
Night
81°F
W 16 mph
Precip.
9%
9%
23.07
thu
thu
Day
82°F
W 17 mph
Precip.
6%
6%
Night
81°F
W 16 mph
Precip.
17%
17%
24.07
fri
fri
Day
82°F
W 17 mph
Precip.
11%
11%
Night
81°F
W 19 mph
Precip.
14%
14%
25.07
sat
sat
Day
82°F
W 19 mph
Precip.
14%
14%
Night
81°F
W 19 mph
Precip.
29%
29%
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 July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 83.0°F. The highest and lowest sea temperatures during the month were 83.7°F and 82.6°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.
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
24 Hours Forecast
St John's
Local time: 22:19
July 20, monday
0000
81°F
W
20 mph
20 mph
0300
81°F
W
19 mph
19 mph
0600
81°F
W
18 mph
18 mph
0900
81°F
W
16 mph
16 mph
1200
82°F
W
14 mph
14 mph
1500
82°F
SW
15 mph
15 mph
1800
81°F
SW
16 mph
16 mph
2100
81°F
SW
14 mph
14 mph
