Current Sea Water Temperature:
+30.4°F
| Maximum Sea Water Temperature in March: | 32.8°F |
| Minimum Sea Water Temperature in March: | 28.8°F |
| Average water temperature in March: | 30.2°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| March 29 | 30.4°F | March 24 | 30.0°F |
| March 28 | 30.0°F | March 23 | 30.2°F |
| March 27 | 30.0°F | March 22 | 29.8°F |
| March 26 | 30.4°F | March 21 | 31.2°F |
| March 25 | 30.0°F | March 20 | 29.8°F |
When is the Warmest Sea for St. John's?
According to our data for the last three years for St. John's the highest average sea water temperature was in August, September and July.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for St. John's was 58.7°F. The maximum and minimum values were 56.2°F and 61.8°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for St. John's was 56.7°F. The maximum and minimum values were 54.4°F and 59.4°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for St. John's was 53.3°F. The maximum and minimum values were 47.0°F and 58.6°F respectively.
Canada Resorts:
NAME
F°
| Halifax |  |
+28 |
| Moncton | |
+28 |
| Montreal | |
+32 |
| Niagara Falls | |
+34 |
| Ottawa | |
+30 |
| Prince Edward Island |  |
+26 |
| Quebec | |
+18 |
| Rocky Harbour | |
+10 |
| Saint John |  |
+30 |
| St. John's | |
+18 |
| Sydney | |
+26 |
| Toronto | |
+34 |
| Vancouver | |
+36 |
| Victoria | |
+32 |
| Winnipeg | |
+18 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
St. John's
Local time: 04:46
30 mar, monday
| 0600 |  |
18°F | NE 12 mph |
| 0900 |  |
26°F | NE 17 mph |
| 1200 |  |
30°F | NE 20 mph |
| 1500 |  |
32°F | NE 22 mph |
| 1800 | |
30°F | NE 21 mph |
| 2100 | |
28°F | N 22 mph |
31 mar, tuesday
| 0000 | |
30°F | N 25 mph |
| 0300 | |
30°F | N 32 mph |