Current sea water temperature:
+33.8°F
| Minimum sea water temperature in March: | 39.0°F |
| Maximum sea water temperature in March: | 33.8°F |
| Average sea water temperature in March: | 36.4°F |
| more information | |
14 days
forecast
forecast
| Saint John |
monthly
weather
weather
| Saint John |
Sea water temperature for the last 10 days:
| March 17 | 33.8°F | March 12 | 36.3°F |
| March 16 | 33.8°F | March 11 | 36.3°F |
| March 15 | 34.9°F | March 10 | 34.7°F |
| March 14 | 35.1°F | March 9 | 35.2°F |
| March 13 | 36.3°F | March 8 | 35.2°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
March
March
| 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: 05:35
March 17, tuesday
0600
50°F
N
26 mph
26 mph
0900
48°F
N
30 mph
30 mph
1200
46°F
NE
24 mph
24 mph
1500
43°F
NE
21 mph
21 mph
1800
37°F
NE
20 mph
20 mph
2100
34°F
E
15 mph
15 mph
March 18, wednesday
0000
27°F
SE
12 mph
12 mph
0300
21°F
E
12 mph
12 mph
