Current sea water temperature:
+39.2°F
| Minimum sea water temperature in April: | 43.0°F |
| Maximum sea water temperature in April: | 34.3°F |
| Average sea water temperature in April: | 38.3°F |
| more information | |
14 days
forecast
forecast
| Saint John |
monthly
weather
weather
| Saint John |
Sea water temperature for the last 10 days:
| April 27 | 39.2°F | April 22 | 37.6°F |
| April 26 | 38.1°F | April 21 | 38.1°F |
| April 25 | 38.3°F | April 20 | 38.7°F |
| April 24 | 38.1°F | April 19 | 38.5°F |
| April 23 | 37.6°F | April 18 | 38.5°F |
Monthly sea water temperature, °F
When is the warmest sea in Saint John?
Based on the data about daily sea water temperature for the last three years the warmest sea in Saint John was noticed in August, September and July.
Monthly Sea Temperatures in Saint John, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 59.5°F. The highest and lowest sea temperatures during the month were 61.7°F and 57.2°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 58.5°F. The highest and lowest sea temperatures during the month were 61.2°F and 56.7°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 55.5°F. The highest and lowest sea temperatures during the month were 63.1°F and 49.8°F.
current
weather
weather
| Saint John |
weather in
May
May
| Saint John |
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: 13:57
April 27, monday
1500
63°F
NW
7 mph
7 mph
1800
54°F
NW
5 mph
5 mph
2100
45°F
SW
3 mph
3 mph
April 28, tuesday
0000
39°F
N
4 mph
4 mph
0300
36°F
NW
2 mph
2 mph
0600
36°F
W
4 mph
4 mph
0900
43°F
W
8 mph
8 mph
1200
50°F
W
9 mph
9 mph
