18.03
wed
wed
Day
25°F
NE 12 mph
Precip.
0%
0%
Night
28°F
SE 4 mph
Precip.
0%
0%
19.03
thu
thu
Day
30°F
NW 5 mph
Precip.
0%
0%
Night
30°F
SW 5 mph
Precip.
0%
0%
20.03
fri
fri
Day
41°F
W 3 mph
Precip.
0%
0%
Night
32°F
NE 6 mph
Precip.
0%
0%
21.03
sat
sat
Day
28°F
S 4 mph
Precip.
0%
0%
Night
27°F
SW 14 mph
Precip.
0%
0%
22.03
sun
sun
Day
21°F
SW 14 mph
Precip.
62%
62%
Night
14°F
S 5 mph
Precip.
0%
0%
23.03
mon
mon
Day
30°F
SE 6 mph
Precip.
55%
55%
Night
28°F
NE 10 mph
Precip.
0%
0%
24.03
tue
tue
Day
36°F
E 9 mph
Precip.
0%
0%
Night
25°F
SW 11 mph
Precip.
43%
43%
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 March, °F
Show year:
2026
2025
2024
The average sea water temperature in March of 2026 was 32.5°F. The highest and lowest sea temperatures during the month were 33.3°F and 32.2°F.
Sea water temperature in April, °F
Show year:
2025
2024
2023
The average sea water temperature in April of 2025 was 34.2°F. The highest and lowest sea temperatures during the month were 35.2°F and 33.4°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: 16:38
March 18, wednesday
1800
32°F
NE
8 mph
8 mph
2100
32°F
E
6 mph
6 mph
March 19, thursday
0000
28°F
SE
4 mph
4 mph
0300
25°F
SE
5 mph
5 mph
0600
27°F
S
6 mph
6 mph
0900
28°F
SW
3 mph
3 mph
1200
30°F
NW
5 mph
5 mph
1500
32°F
N
4 mph
4 mph
