Current Sea Water Temperature:
+42.0°F
| Maximum Sea Water Temperature in December: | 45.0°F |
| Minimum Sea Water Temperature in December: | 35.0°F |
| Average water temperature in December: | 39.3°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| December 05 | 42.0°F | November 30 | 43.4°F |
| December 04 | 42.6°F | November 29 | 43.0°F |
| December 03 | 43.0°F | November 28 | 43.2°F |
| December 02 | 42.8°F | November 27 | 43.4°F |
| December 01 | 43.2°F | November 26 | 43.6°F |
When is the Warmest Sea for Sydney?
According to our data for the last three years for Sydney 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 Sydney was 69.4°F. The maximum and minimum values were 67.6°F and 72.0°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Sydney was 66.4°F. The maximum and minimum values were 61.8°F and 70.2°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2025 for Sydney was 65.2°F. The maximum and minimum values were 57.6°F and 70.6°F respectively.
Canada Resorts:
NAME
F°
| Halifax |  |
+12 |
| Kingston |  |
+4 |
| Moncton | |
-6 |
| Montreal | |
-2 |
| Niagara Falls | |
+10 |
| Ottawa | |
-6 |
| Prince Edward Island |  |
+6 |
| Quebec | |
-12 |
| Rocky Harbour |  |
+22 |
| St. John's |  |
+36 |
| Sydney | |
+24 |
| Toronto | |
+10 |
| Vancouver | |
+42 |
| Victoria | |
+44 |
| Winnipeg | |
+8 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Sydney
Local time: 04:04
05 dec, friday
| 0600 |  |
16°F | E 22 mph |
| 0900 |  |
14°F | E 24 mph |
| 1200 |  |
20°F | SE 28 mph |
| 1500 | |
22°F | E 27 mph |
| 1800 | |
22°F | E 24 mph |
| 2100 | |
20°F | E 20 mph |
06 dec, saturday
| 0000 | |
18°F | E 18 mph |
| 0300 | |
20°F | E 17 mph |