17.05
sun
sun
Day
61°F
NE 11 mph
Precip.
0%
0%
Night
46°F
E 17 mph
Precip.
0%
0%
18.05
mon
mon
Day
48°F
SE 14 mph
Precip.
0%
0%
Night
37°F
SE 14 mph
Precip.
0%
0%
19.05
tue
tue
Day
50°F
SE 7 mph
Precip.
0%
0%
Night
41°F
W 2 mph
Precip.
0%
0%
20.05
wed
wed
Day
37°F
NW 9 mph
Precip.
100%
100%
Night
39°F
N 6 mph
Precip.
78%
78%
21.05
thu
thu
Day
54°F
E 21 mph
Precip.
0%
0%
Night
39°F
E 12 mph
Precip.
0%
0%
22.05
fri
fri
Day
48°F
E 17 mph
Precip.
0%
0%
Night
39°F
E 19 mph
Precip.
0%
0%
23.05
sat
sat
Day
48°F
SE 9 mph
Precip.
0%
0%
Night
39°F
NE 5 mph
Precip.
0%
0%
24.05
sun
sun
Day
50°F
W 7 mph
Precip.
0%
0%
Night
39°F
NW 4 mph
Precip.
0%
0%
25.05
mon
mon
Day
48°F
NW 6 mph
Precip.
0%
0%
Night
43°F
E 12 mph
Precip.
66%
66%
26.05
tue
tue
Day
54°F
SE 8 mph
Precip.
64%
64%
Night
45°F
E 11 mph
Precip.
0%
0%
27.05
wed
wed
Day
59°F
E 7 mph
Precip.
0%
0%
Night
45°F
E 12 mph
Precip.
0%
0%
28.05
thu
thu
Day
59°F
E 14 mph
Precip.
0%
0%
Night
54°F
E 14 mph
Precip.
0%
0%
29.05
fri
fri
Day
64°F
E 9 mph
Precip.
0%
0%
Night
57°F
NE 8 mph
Precip.
64%
64%
30.05
sat
sat
Day
68°F
NE 11 mph
Precip.
0%
0%
Night
59°F
NE 11 mph
Precip.
0%
0%
sea water
temperature
temperature
| St. John's |
monthly
weather
weather
| St. John's |
current
weather
weather
| St. John's |
7 days
forecast
forecast
| St. John's |
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 35.2°F. The highest and lowest sea temperatures during the month were 36.9°F and 33.8°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
Places in Canada:
Name
°F
24 Hours Forecast
St. John's
Local time: 17:39
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
