26.08
wed
wed
Day
72°F
N 9 mph
Precip.
24%
24%
Night
64°F
NW 4 mph
Precip.
15%
15%
27.08
thu
thu
Day
72°F
E 12 mph
Precip.
44%
44%
Night
63°F
SE 8 mph
Precip.
16%
16%
28.08
fri
fri
Day
68°F
S 6 mph
Precip.
1%
1%
Night
57°F
S 4 mph
Precip.
8%
8%
29.08
sat
sat
Day
72°F
N 12 mph
Precip.
3%
3%
Night
64°F
W 1 mph
Precip.
18%
18%
30.08
sun
sun
Day
72°F
NE 11 mph
Precip.
14%
14%
Night
63°F
E 3 mph
Precip.
39%
39%
31.08
mon
mon
Day
66°F
N 6 mph
Precip.
35%
35%
Night
68°F
NW 4 mph
Precip.
49%
49%
01.09
tue
tue
Day
73°F
E 5 mph
Precip.
37%
37%
Night
72°F
W 5 mph
Precip.
20%
20%
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 69.5°F. The highest and lowest sea temperatures during the month were 73.2°F and 62.8°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.
Air temperature in Oshawa, °F
Precipitation total in Oshawa, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Oshawa
Oshawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Oshawa
Local time: 12:59
August 26, wednesday
1500
73°F
N
11 mph
11 mph
1800
72°F
N
9 mph
9 mph
2100
64°F
W
7 mph
7 mph
August 27, thursday
0000
64°F
NW
4 mph
4 mph
0300
64°F
N
4 mph
4 mph
0600
63°F
N
10 mph
10 mph
0900
66°F
NE
11 mph
11 mph
1200
72°F
E
12 mph
12 mph
