Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Thursday, May 28, 2026, 5:00 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

55°F
Sunny
Sunny
55.6°F
56.7°F
59%
S 2.7 mph
5.3 mph
57.2°F
37.5°F
0 in
0%
6 mi
1023 mbar
2.7

Five Day Weather Forecast

Sunny
Thu
H: 57°F
L: 48°F
Patchy rain nearby
Fri
H: 67°F
L: 48°F
Sunny
Sat
H: 57°F
L: 47°F
Sunny
Sun
H: 60°F
L: 44°F
Sunny
Mon
H: 56°F
L: 46°F

Air Quality

AQI: 1 - Good
PM2.5: 4.58 μg/m3
PM10: 5.08 μg/m3
Carbon Monoxide: 122.68 μg/m3
Nitrogen Dioxide: 3.38 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 65 μg/m3

Astronomical

Sunrise: 5:10 AM
Sun Transit: 12:58 AM
Sunset: 8:48 PM
Daylight: 15 hrs 39 mins
Moonrise: 6:39 PM
Moon Transit: 11:13 PM
Moonset: 3:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

10:18 AM - 12:48 AM
12:00 AM - 12:00 AM

Minor Periods

6:09 PM - 7:39 PM
2:49 AM - 4:19 AM

Action Rating: 2 out of 5

Special Weather Statement issued May 28 at 12:35PM CDT by NWS Duluth MN

Effective: Thu May 28, 2026, 12:35 PM
Expires: Thu May 28, 2026, 6:00 PM

Dry conditions with relative humidity values between 20 and 30 percent are forecast this afternoon and early evening for portions of northeast Minnesota north of a line from Big Falls to Ely to Gunflint Lake. East winds of 5 to 10 mph with gusts up to 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.


Thursday, May 28, 2026

Weather Forecast

Sunny
57°F
47.7°F
52.4°F
54%
0 in
0%
0%
7.2 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 4.94 μg/m3
PM10: 5.47 μg/m3
Carbon Monoxide: 114.8 μg/m3
Nitrogen Dioxide: 1.84 μg/m3
Sulphur Dioxide: 0.99 μg/m3
Ozone: 67.28 μg/m3

Astronomical

Sunrise: 5:10 AM
Sun Transit: 12:58 AM
Sunset: 8:48 PM
Daylight: 15 hrs 39 mins
Moonrise: 6:39 PM
Moon Transit: 11:13 PM
Moonset: 3:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

10:18 AM - 12:48 AM
12:00 AM - 12:00 AM

Minor Periods

6:09 PM - 7:39 PM
2:49 AM - 4:19 AM

Action Rating: 2 out of 5

Friday, May 29, 2026

Weather Forecast

Patchy rain nearby
66.5°F
48.4°F
57.2°F
73%
0.09 in
74%
0%
13 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 5.23 μg/m3
PM10: 5.67 μg/m3
Carbon Monoxide: 125.88 μg/m3
Nitrogen Dioxide: 2.41 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 75.48 μg/m3

Astronomical

Sunrise: 5:09 AM
Sun Transit: 12:58 AM
Sunset: 8:49 PM
Daylight: 15 hrs 40 mins
Moonrise: 7:48 PM
Moon Transit: 12:00 AM
Moonset: 3:40 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:04 AM - 1:34 PM

Minor Periods

7:18 PM - 8:48 PM
3:10 AM - 4:40 AM

Action Rating: 4 out of 5

Saturday, May 30, 2026

Weather Forecast

Sunny
56.9°F
46.9°F
51.7°F
63%
0 in
0%
0%
15.4 mph
7.9


Air Quality

AQI: 1 - Good
PM2.5: 3.99 μg/m3
PM10: 4.28 μg/m3
Carbon Monoxide: 115.36 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 85.92 μg/m3

Astronomical

Sunrise: 5:08 AM
Sun Transit: 12:58 AM
Sunset: 8:50 PM
Daylight: 15 hrs 42 mins
Moonrise: 8:55 PM
Moon Transit: 12:00 AM
Moonset: 4:07 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:52 AM - 2:22 PM

Minor Periods

8:25 PM - 9:55 PM
3:37 AM - 5:07 AM

Action Rating: 5 out of 5

Sunday, May 31, 2026

Weather Forecast

Sunny
60.2°F
43.6°F
53.2°F
70%
0 in
0%
0%
10.1 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 3.12 μg/m3
PM10: 3.63 μg/m3
Carbon Monoxide: 110.22 μg/m3
Nitrogen Dioxide: 1.51 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 69.8 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

Sunny
56°F
45.7°F
53.4°F
61%
0 in
0%
0%
13.9 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 4.48 μg/m3
PM10: 5.52 μg/m3
Carbon Monoxide: 124.29 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 80.15 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

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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