Measurements:
°C
°F
CURRENT WEATHER
13:00
Grand Marais
44°F
W 9 mph
Feels like: 40°F
Precip: 0%
World Resorts USA Grand Marais Weather

7 Day Weather Forecast

05.14
thu
DAY
44°F
W 9 mph
precip
0%
NIGHT
44°F
W 2 mph
precip
100%
05.15
fri
DAY
54°F
NE 8 mph
precip
0%
NIGHT
52°F
E 8 mph
precip
0%
05.16
sat
DAY
60°F
E 12 mph
precip
0%
NIGHT
40°F
SW 7 mph
precip
0%
05.17
sun
DAY
48°F
W 19 mph
precip
0%
NIGHT
46°F
SW 19 mph
precip
100%
05.18
mon
DAY
50°F
W 3 mph
precip
0%
NIGHT
46°F
SW 21 mph
precip
100%
05.19
tue
DAY
40°F
E 19 mph
precip
75%
NIGHT
36°F
E 20 mph
precip
68%
05.20
wed
DAY
44°F
E 16 mph
precip
0%
NIGHT
34°F
S 6 mph
precip
0%

Grand Marais Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Grand Marais was 2.5°F. The maximum and minimum values were 1.0°F and 4.5°F respectively.

Grand Marais on the Weather Map

Best Time to Visit Grand Marais
The most sunny months:
September 14 days
August 13 days
July 12 days
The most warm months:
August 70.1 °F
July 69.0 °F
September 63.5 °F
Warmest sea temperature:
August 61.3 °F
September 60.2 °F
October 53.1 °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