Measurements:
°C
°F
CURRENT WEATHER
00:37
Grand Marais
38°F
W 9 mph
Feels like: 32°F
Precip: 18%
World Resorts USA Grand Marais Weather

7 Day Weather Forecast

10.27
tue
DAY
40°F
W 15 mph
precip
74%
NIGHT
46°F
SW 3 mph
precip
38%
10.28
wed
DAY
52°F
NE 9 mph
precip
24%
NIGHT
50°F
S 16 mph
precip
75%
10.29
thu
DAY
52°F
E 11 mph
precip
5%
NIGHT
40°F
SE 9 mph
precip
6%
10.30
fri
DAY
46°F
NE 5 mph
precip
15%
NIGHT
40°F
S 4 mph
precip
22%
10.31
sat
DAY
48°F
NW 5 mph
precip
19%
NIGHT
48°F
W 5 mph
precip
54%
11.01
sun
DAY
50°F
W 3 mph
precip
46%
NIGHT
48°F
SW 4 mph
precip
40%
11.02
mon
DAY
50°F
SW 14 mph
precip
30%
NIGHT
44°F
SW 14 mph
precip
22%

Grand Marais Sea Water Temperature in October, °F

Select Year: 2026 2025 2024

The average sea surface temperature in October 2026 for Grand Marais was 10.0°F. The maximum and minimum values were 8.1°F and 13.6°F respectively.

Grand Marais on the Weather Map

Best Time to Visit Grand Marais
The most sunny months:
August 14 days
September 13 days
July 12 days
The most warm months:
August 69.8 °F
July 68.5 °F
September 63.3 °F
Warmest sea temperature:
August 60.3 °F
September 59.7 °F
October 52.6 °F
The most cold months:
January 15.2 °F
February 16.3 °F
December 22.1 °F
The most rainy months:
August 3 days
April 2 days
July 2 days
The most windy months:
November 10 mph
December 9 mph
January 9 mph
more details