01.05
fri
fri
Day
46°F
N 6 mph
Precip.
75%
75%
Night
41°F
E 6 mph
Precip.
0%
0%
02.05
sat
sat
Day
52°F
N 7 mph
Precip.
0%
0%
Night
43°F
NW 6 mph
Precip.
60%
60%
03.05
sun
sun
Day
45°F
W 9 mph
Precip.
100%
100%
Night
41°F
SE 12 mph
Precip.
100%
100%
04.05
mon
mon
Day
52°F
NE 14 mph
Precip.
0%
0%
Night
43°F
N 6 mph
Precip.
0%
0%
05.05
tue
tue
Day
52°F
NE 15 mph
Precip.
0%
0%
Night
45°F
N 9 mph
Precip.
100%
100%
06.05
wed
wed
Day
50°F
N 14 mph
Precip.
0%
0%
Night
46°F
NE 16 mph
Precip.
100%
100%
07.05
thu
thu
Day
46°F
NW 5 mph
Precip.
100%
100%
Night
50°F
NE 11 mph
Precip.
100%
100%
08.05
fri
fri
Day
43°F
N 19 mph
Precip.
0%
0%
Night
43°F
NE 15 mph
Precip.
0%
0%
09.05
sat
sat
Day
50°F
NE 14 mph
Precip.
0%
0%
Night
39°F
N 4 mph
Precip.
0%
0%
10.05
sun
sun
Day
54°F
N 8 mph
Precip.
0%
0%
Night
46°F
N 6 mph
Precip.
0%
0%
11.05
mon
mon
Day
45°F
W 17 mph
Precip.
100%
100%
Night
45°F
SW 3 mph
Precip.
71%
71%
12.05
tue
tue
Day
55°F
SE 9 mph
Precip.
0%
0%
Night
43°F
NE 4 mph
Precip.
0%
0%
13.05
wed
wed
Day
50°F
NE 9 mph
Precip.
79%
79%
Night
43°F
NE 4 mph
Precip.
100%
100%
14.05
thu
thu
Day
52°F
E 10 mph
Precip.
100%
100%
Night
48°F
E 9 mph
Precip.
0%
0%
sea water
temperature
temperature
| Saint John |
monthly
weather
weather
| Saint John |
current
weather
weather
| Saint John |
7 days
forecast
forecast
| Saint John |
Sea water temperature in May, °F
Show year:
2025
2024
2023
The average sea water temperature in May of 2025 was 42.9°F. The highest and lowest sea temperatures during the month were 45.9°F and 40.3°F.
Air temperature in Saint John, °F
Precipitation total in Saint John, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Saint John
Saint John on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Saint John
Local time: 21:26
May 02, saturday
0000
41°F
E
6 mph
6 mph
0300
37°F
E
6 mph
6 mph
0600
36°F
SE
5 mph
5 mph
0900
46°F
E
4 mph
4 mph
1200
52°F
N
7 mph
7 mph
1500
52°F
NE
9 mph
9 mph
1800
46°F
NE
7 mph
7 mph
2100
43°F
N
5 mph
5 mph
