21.07
tue
tue
Day
61°F
SE 14 mph
Precip.
5%
5%
Night
55°F
SE 11 mph
Precip.
5%
5%
22.07
wed
wed
Day
68°F
SE 6 mph
Precip.
1%
1%
Night
59°F
SE 9 mph
Precip.
7%
7%
23.07
thu
thu
Day
68°F
NE 11 mph
Precip.
3%
3%
Night
61°F
SE 6 mph
Precip.
12%
12%
24.07
fri
fri
Day
64°F
NW 5 mph
Precip.
24%
24%
Night
63°F
NE 11 mph
Precip.
9%
9%
25.07
sat
sat
Day
64°F
NE 11 mph
Precip.
29%
29%
Night
61°F
NE 9 mph
Precip.
54%
54%
26.07
sun
sun
Day
77°F
E 9 mph
Precip.
3%
3%
Night
57°F
SW 7 mph
Precip.
43%
43%
27.07
mon
mon
Day
63°F
W 10 mph
Precip.
8%
8%
Night
55°F
S 5 mph
Precip.
4%
4%
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 July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 41.6°F. The highest and lowest sea temperatures during the month were 46.0°F and 38.7°F.
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: 08:35
July 21, tuesday
0900
63°F
SE
15 mph
15 mph
1200
61°F
SE
14 mph
14 mph
1500
61°F
S
15 mph
15 mph
1800
57°F
S
11 mph
11 mph
2100
55°F
S
9 mph
9 mph
July 22, wednesday
0000
55°F
SE
11 mph
11 mph
0300
52°F
SE
11 mph
11 mph
0600
50°F
SE
9 mph
9 mph
