Current sea water temperature:
+40.6°F
| Minimum sea water temperature in April: | 44.6°F |
| Maximum sea water temperature in April: | 34.9°F |
| Average sea water temperature in April: | 40.1°F |
| more information | |
14 days
forecast
forecast
| Oshawa |
monthly
weather
weather
| Oshawa |
Sea water temperature for the last 10 days:
| April 27 | 40.6°F | April 22 | 38.7°F |
| April 26 | 39.7°F | April 21 | 39.2°F |
| April 25 | 40.1°F | April 20 | 39.4°F |
| April 24 | 40.8°F | April 19 | 37.9°F |
| April 23 | 39.9°F | April 18 | 36.1°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
May
May
| Oshawa |
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 12:57
April 27, monday
1500
66°F
W
12 mph
12 mph
1800
55°F
W
14 mph
14 mph
2100
48°F
W
15 mph
15 mph
April 28, tuesday
0000
46°F
NW
13 mph
13 mph
0300
46°F
NW
12 mph
12 mph
0600
45°F
W
12 mph
12 mph
0900
46°F
NW
9 mph
9 mph
1200
46°F
NW
9 mph
9 mph
