18.12
thu
thu
Day
81°F
W 19 mph
Precip.
100%
100%
Night
79°F
W 16 mph
Precip.
100%
100%
19.12
fri
fri
Day
81°F
W 19 mph
Precip.
100%
100%
Night
79°F
W 14 mph
Precip.
100%
100%
20.12
sat
sat
Day
81°F
W 15 mph
Precip.
77%
77%
Night
79°F
W 18 mph
Precip.
61%
61%
21.12
sun
sun
Day
81°F
W 18 mph
Precip.
0%
0%
Night
79°F
W 17 mph
Precip.
100%
100%
22.12
mon
mon
Day
81°F
W 17 mph
Precip.
100%
100%
Night
79°F
W 17 mph
Precip.
100%
100%
23.12
tue
tue
Day
79°F
W 14 mph
Precip.
78%
78%
Night
79°F
W 14 mph
Precip.
100%
100%
24.12
wed
wed
Day
79°F
W 13 mph
Precip.
59%
59%
Night
77°F
W 13 mph
Precip.
25%
25%
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 December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 82.0°F. The highest and lowest sea temperatures during the month were 82.6°F and 81.5°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 81.4°F. The highest and lowest sea temperatures during the month were 82.2°F and 80.8°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: 04:12
December 18, thursday
0600
79°F
W
17 mph
17 mph
0900
81°F
W
18 mph
18 mph
1200
81°F
W
19 mph
19 mph
1500
81°F
W
16 mph
16 mph
1800
79°F
SW
19 mph
19 mph
2100
79°F
W
19 mph
19 mph
December 19, friday
0000
79°F
W
16 mph
16 mph
0300
79°F
W
18 mph
18 mph
