Current sea water temperature:
+42.4°F
| Minimum sea water temperature in May: | 58.8°F |
| Maximum sea water temperature in May: | 39.9°F |
| Average sea water temperature in May: | 46.0°F |
| more information | |
14 days
forecast
forecast
| Oshawa |
monthly
weather
weather
| Oshawa |
Sea water temperature for the last 10 days:
| May 17 | 42.4°F | May 12 | 41.2°F |
| May 16 | 41.9°F | May 11 | 41.0°F |
| May 15 | 41.4°F | May 10 | 40.6°F |
| May 14 | 41.0°F | May 9 | 40.3°F |
| May 13 | 41.7°F | May 8 | 40.3°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: 15:26
May 17, sunday
1800
81°F
NW
6 mph
6 mph
2100
70°F
W
7 mph
7 mph
May 18, monday
0000
59°F
NW
6 mph
6 mph
0300
54°F
W
9 mph
9 mph
0600
52°F
NW
7 mph
7 mph
0900
54°F
N
6 mph
6 mph
1200
63°F
NE
11 mph
11 mph
1500
68°F
NE
16 mph
16 mph
