Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Sunday, May 31, 2026, 6:15 AM CDT

Temperature Locations

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Lake Superior

Station Name: Grand Marais
Data Source: USGS

Elevation Above Sea Level: 607 feet

Nearest Address:
2nd Street
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.7517, -90.3283

Nearby Water Temperatures

Grand Marais Harbor, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (19.4 mi)
Grand Portage River, Grand Portage, MN (33.3 mi)
Lake Superior, Lake Superior, MI (38.1 mi)
Baptism River, Illgen City, MN (49.7 mi)
Washington Creek, Windigo, MI (56.1 mi)
Kawishiwi River, Ely, MN (57.2 mi)
Dunka River, Babbitt, MN (71.4 mi)
Dunka River, Babbitt, MN (71.7 mi)
Partrige River, Babbitt, MN (74.9 mi)
Lake Superior, Two Harbors, MN (80.5 mi)
Chequamegon Bay, Ashland, WI (81.7 mi)
Saint Louis River, Hoyt Lakes, MN (81.9 mi)
Lake Superior, Calumet, MI (86.9 mi)
Presque Isle River, Tula, MI (87.2 mi)

Weather for Grand Marais, Minnesota

Current Weather

57.9°F
Partly Cloudy
Partly Cloudy
57.6°F
57.9°F
58%
WSW 5.1 mph
10.8 mph
57.6°F
44.7°F
0 in
30%
6 mi
1015 mbar
0.5

Five Day Weather Forecast

Partly Cloudy
Sun
H: 61°F
L: 45°F
Patchy rain nearby
Mon
H: 59°F
L: 47°F
Sunny
Tue
H: 58°F
L: 45°F
Partly Cloudy
Wed
H: 60°F
L: 49°F
Heavy rain
Thu
H: 64°F
L: 50°F

Air Quality

AQI: 1 - Good
PM2.5: 5.48 μg/m3
PM10: 6.68 μg/m3
Carbon Monoxide: 117.18 μg/m3
Nitrogen Dioxide: 1.28 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 5:08 AM
Sun Transit: 1:00 PM
Sunset: 8:51 PM
Daylight: 15 hrs 44 mins
Moonrise: 9:56 PM
Moon Transit: 12:49 AM
Moonset: 4:41 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:42 AM - 3:12 PM

Minor Periods

9:26 PM - 10:56 PM
4:11 AM - 5:41 AM

Action Rating: 3 out of 5

Special Weather Statement issued May 31 at 10:10AM CDT by NWS Duluth MN

Effective: Sun May 31, 2026, 10:10 AM
Expires: Sun May 31, 2026, 6:00 PM

Dry conditions with relative humidity values between 15 and 25 percent are forecast for this afternoon into early evening for portions of northeast Minnesota including the Iron Range, Arrowhead and areas north towards the International Border. Southeast winds of 5 to 10 mph and gusts of 10-15 mph are forecast. Together, these conditions may cause fires to spread. Check burning restrictions and fire danger before burning. For more information on burning restrictions for Minnesota, see www.dnr.state.mn.us/forestry/fire/firerating_restrictions.html.


Sunday, May 31, 2026

Weather Forecast

Partly Cloudy
60.8°F
45.3°F
51.6°F
66%
0 in
0%
0%
9.4 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 3.6 μg/m3
PM10: 4.3 μg/m3
Carbon Monoxide: 112.93 μg/m3
Nitrogen Dioxide: 1.54 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 69.04 μg/m3

Astronomical

Sunrise: 5:08 AM
Sun Transit: 1:00 PM
Sunset: 8:51 PM
Daylight: 15 hrs 44 mins
Moonrise: 9:56 PM
Moon Transit: 12:49 AM
Moonset: 4:41 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:19 AM - 2:49 AM
12:42 AM - 3:12 PM

Minor Periods

9:26 PM - 10:56 PM
4:11 AM - 5:41 AM

Action Rating: 3 out of 5

Monday, June 1, 2026

Weather Forecast

Patchy rain nearby
59.1°F
46.8°F
53.3°F
70%
0 in
83%
0%
14.3 mph
3.5


Air Quality

AQI: 1 - Good
PM2.5: 2.72 μg/m3
PM10: 3.27 μg/m3
Carbon Monoxide: 112.06 μg/m3
Nitrogen Dioxide: 0.55 μg/m3
Sulphur Dioxide: 0.35 μg/m3
Ozone: 74.67 μg/m3

Astronomical

Sunrise: 5:07 AM
Sun Transit: 1:00 PM
Sunset: 8:52 PM
Daylight: 15 hrs 45 mins
Moonrise: 10:48 PM
Moon Transit: 1:40 AM
Moonset: 5:24 AM
Moon Phase: Full
Moon Illumination: 96.8%

Best Times for Fishing or Hunting

Major Periods

1:10 AM - 3:40 AM
1:33 PM - 4:03 PM

Minor Periods

10:18 PM - 11:48 PM
4:54 AM - 6:24 AM

Action Rating: 4 out of 5

Tuesday, June 2, 2026

Weather Forecast

Sunny
57.9°F
44.9°F
52.3°F
65%
0 in
0%
0%
10.3 mph
7.5


Air Quality

AQI: 1 - Good
PM2.5: 3.77 μg/m3
PM10: 4.67 μg/m3
Carbon Monoxide: 115.37 μg/m3
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 0.51 μg/m3
Ozone: 73.04 μg/m3

Astronomical

Sunrise: 5:06 AM
Sun Transit: 1:00 PM
Sunset: 8:53 PM
Daylight: 15 hrs 47 mins
Moonrise: 11:29 PM
Moon Transit: 2:32 AM
Moonset: 6:18 AM
Moon Phase: Full
Moon Illumination: 91.7%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:24 PM - 4:54 PM

Minor Periods

12:00 AM - 12:00 AM
5:48 AM - 7:18 AM

Action Rating: 3 out of 5

Wednesday, June 3, 2026

Weather Forecast

Partly Cloudy
60.2°F
48.8°F
54.9°F
74%
0 in
0%
0%
7.2 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 5.14 μg/m3
PM10: 5.97 μg/m3
Carbon Monoxide: 124 μg/m3
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 0.44 μg/m3
Ozone: 93.33 μg/m3

Astronomical

Sunrise: 5:06 AM
Sun Transit: 1:00 PM
Sunset: 8:54 PM
Daylight: 15 hrs 48 mins
Moonrise: 12:29 AM
Moon Transit: 3:22 AM
Moonset: 7:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.4%

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
3:14 PM - 5:44 PM

Minor Periods

6:50 AM - 8:20 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, June 4, 2026

Weather Forecast

Heavy rain
63.8°F
49.8°F
55.1°F
93%
1.01 in
67%
0%
18.3 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 6.06 μg/m3
PM10: 6.73 μg/m3
Carbon Monoxide: 155 μg/m3
Nitrogen Dioxide: 1.39 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 98 μg/m3

Astronomical

Sunrise: 5:05 AM
Sun Transit: 1:00 PM
Sunset: 8:55 PM
Daylight: 15 hrs 50 mins
Moonrise: 12:02 AM
Moon Transit: 4:11 AM
Moonset: 8:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.3%

Best Times for Fishing or Hunting

Major Periods

3:41 AM - 6:11 AM
4:02 PM - 6:32 PM

Minor Periods

7:59 AM - 9:29 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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