14.08
fri
fri
Day
66°F
W 9 mph
Precip.
5%
5%
Night
57°F
SW 9 mph
Precip.
7%
7%
15.08
sat
sat
Day
57°F
SW 7 mph
Precip.
40%
40%
Night
61°F
SE 10 mph
Precip.
25%
25%
16.08
sun
sun
Day
70°F
SE 9 mph
Precip.
4%
4%
Night
57°F
S 4 mph
Precip.
5%
5%
17.08
mon
mon
Day
66°F
NE 8 mph
Precip.
6%
6%
Night
55°F
E 6 mph
Precip.
51%
51%
18.08
tue
tue
Day
66°F
SE 6 mph
Precip.
11%
11%
Night
55°F
SE 9 mph
Precip.
3%
3%
19.08
wed
wed
Day
64°F
N 8 mph
Precip.
2%
2%
Night
57°F
E 4 mph
Precip.
4%
4%
20.08
thu
thu
Day
70°F
NE 10 mph
Precip.
9%
9%
Night
59°F
N 6 mph
Precip.
47%
47%
sea water
temperature
temperature
| Grand Marais |
monthly
weather
weather
| Grand Marais |
current
weather
weather
| Grand Marais |
14 days
forecast
forecast
| Grand Marais |
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 61.3°F. The highest and lowest sea temperatures during the month were 65.7°F and 55.9°F.
Air temperature in Grand Marais, °F
Precipitation total in Grand Marais, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Grand Marais
Grand Marais on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Grand Marais
Local time: 04:04
August 14, friday
0600
55°F
SW
6 mph
6 mph
0900
64°F
W
9 mph
9 mph
1200
66°F
W
9 mph
9 mph
1500
66°F
W
9 mph
9 mph
1800
64°F
W
9 mph
9 mph
2100
57°F
SW
7 mph
7 mph
August 15, saturday
0000
57°F
SW
9 mph
9 mph
0300
59°F
SW
9 mph
9 mph
