Current sea water temperature:
+38.5°F
| Minimum sea water temperature in December: | 44.4°F |
| Maximum sea water temperature in December: | 37.4°F |
| Average sea water temperature in December: | 40.2°F |
| more information | |
14 days
forecast
forecast
| Oshawa |
monthly
weather
weather
| Oshawa |
Sea water temperature for the last 10 days:
| December 5 | 38.5°F | November 30 | 39.9°F |
| December 4 | 38.7°F | November 29 | 40.5°F |
| December 3 | 39.6°F | November 28 | 40.6°F |
| December 2 | 39.2°F | November 27 | 42.1°F |
| December 1 | 40.3°F | November 26 | 41.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Oshawa?
Based on the data about daily sea water temperature for the last three years the warmest sea in Oshawa was noticed in August, September and July.
Monthly Sea Temperatures in Oshawa, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.1°F. The highest and lowest sea temperatures during the month were 77.7°F and 69.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 65.2°F. The highest and lowest sea temperatures during the month were 68.0°F and 57.6°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 67.1°F. The highest and lowest sea temperatures during the month were 74.5°F and 60.4°F.
current
weather
weather
| Oshawa |
weather in
December
December
| Oshawa |
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 04:58
December 05, friday
0600
12°F
N
5 mph
5 mph
0900
21°F
N
12 mph
12 mph
1200
27°F
NE
14 mph
14 mph
1500
30°F
NE
13 mph
13 mph
1800
30°F
NE
9 mph
9 mph
2100
32°F
NE
11 mph
11 mph
December 06, saturday
0000
32°F
NE
14 mph
14 mph
0300
32°F
NE
16 mph
16 mph
