Current sea water temperature:
+44.6°F
| Minimum sea water temperature in May: | 51.4°F |
| Maximum sea water temperature in May: | 39.4°F |
| Average sea water temperature in May: | 44.6°F |
| more information | |
14 days
forecast
forecast
| Saint John |
monthly
weather
weather
| Saint John |
Sea water temperature for the last 10 days:
| May 17 | 44.6°F | May 12 | 41.9°F |
| May 16 | 44.2°F | May 11 | 43.0°F |
| May 15 | 44.1°F | May 10 | 43.3°F |
| May 14 | 44.6°F | May 9 | 43.2°F |
| May 13 | 44.4°F | May 8 | 42.6°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: 16:26
May 17, sunday
1800
73°F
SE
12 mph
12 mph
2100
61°F
SE
11 mph
11 mph
May 18, monday
0000
50°F
SE
7 mph
7 mph
0300
43°F
SE
5 mph
5 mph
0600
41°F
SE
5 mph
5 mph
0900
52°F
SE
7 mph
7 mph
1200
59°F
SE
6 mph
6 mph
1500
61°F
NE
9 mph
9 mph
