19.05
tue
tue
Day
41°F
SE 13 mph
Precip.
0%
0%
Night
36°F
SE 6 mph
Precip.
0%
0%
20.05
wed
wed
Day
48°F
N 6 mph
Precip.
0%
0%
Night
36°F
SW 2 mph
Precip.
0%
0%
21.05
thu
thu
Day
50°F
N 6 mph
Precip.
0%
0%
Night
43°F
S 5 mph
Precip.
0%
0%
22.05
fri
fri
Day
50°F
W 9 mph
Precip.
0%
0%
Night
43°F
W 11 mph
Precip.
0%
0%
23.05
sat
sat
Day
45°F
W 9 mph
Precip.
100%
100%
Night
45°F
SW 6 mph
Precip.
100%
100%
24.05
sun
sun
Day
52°F
NW 3 mph
Precip.
40%
40%
Night
46°F
W 3 mph
Precip.
74%
74%
25.05
mon
mon
Day
57°F
NE 7 mph
Precip.
55%
55%
Night
55°F
NE 9 mph
Precip.
64%
64%
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 May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 34.7°F. The highest and lowest sea temperatures during the month were 37.0°F and 33.8°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 39.0°F. The highest and lowest sea temperatures during the month were 41.9°F and 35.4°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: 07:34
May 19, tuesday
0900
41°F
E
10 mph
10 mph
1200
41°F
SE
13 mph
13 mph
1500
43°F
SE
14 mph
14 mph
1800
45°F
SE
12 mph
12 mph
2100
41°F
SE
9 mph
9 mph
May 20, wednesday
0000
36°F
SE
6 mph
6 mph
0300
34°F
SE
6 mph
6 mph
0600
34°F
SE
7 mph
7 mph
