Current Sea Water Temperature:
+38.4°F
| Maximum Sea Water Temperature in December: | 46.0°F |
| Minimum Sea Water Temperature in December: | 34.2°F |
| Average water temperature in December: | 39.9°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 04 | 38.4°F | November 29 | 41.4°F |
| December 03 | 39.6°F | November 28 | 41.4°F |
| December 02 | 39.2°F | November 27 | 41.6°F |
| December 01 | 40.4°F | November 26 | 41.4°F |
| November 30 | 40.2°F | November 25 | 41.4°F |
When is the Warmest Sea for Toronto?
According to our data for the last three years for Toronto the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2025 for Toronto was 75.8°F. The maximum and minimum values were 71.6°F and 80.6°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Toronto was 70.6°F. The maximum and minimum values were 62.2°F and 78.0°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Toronto was 66.8°F. The maximum and minimum values were 59.4°F and 71.4°F respectively.
Canada Resorts:
NAME
F°
| Halifax |  |
+12 |
| Kingston |  |
+4 |
| Moncton | |
-6 |
| Montreal | |
-2 |
| Niagara Falls | |
+10 |
| Ottawa | |
-4 |
| Prince Edward Island |  |
+6 |
| Quebec | |
-12 |
| Rocky Harbour |  |
+28 |
| St. John's | |
+32 |
| Sydney | |
+24 |
| Toronto | |
+10 |
| Vancouver | |
+42 |
| Victoria | |
+44 |
| Winnipeg | |
+12 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Toronto
Local time: 01:09
05 dec, friday
| 0300 |  |
10°F | N 6 mph |
| 0600 | |
12°F | N 8 mph |
| 0900 |  |
20°F | NE 8 mph |
| 1200 |  |
24°F | NE 12 mph |
| 1500 | |
26°F | NE 11 mph |
| 1800 | |
28°F | NE 9 mph |
| 2100 | |
28°F | NE 9 mph |
06 dec, saturday
| 0000 | |
28°F | NE 10 mph |