Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Saturday, May 30, 2026, 6:00 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

48.9°F
Sunny
Sunny
43.6°F
61°F
56%
ENE 13.6 mph
25.1 mph
60.9°F
32.5°F
0 in
0%
6 mi
1023 mbar
1.3

Five Day Weather Forecast

Sunny
Sat
H: 63°F
L: 53°F
Sunny
Sun
H: 59°F
L: 45°F
Partly Cloudy
Mon
H: 55°F
L: 49°F
Sunny
Tue
H: 57°F
L: 46°F
Sunny
Wed
H: 61°F
L: 49°F

Air Quality

AQI: 1 - Good
PM2.5: 2.98 μg/m3
PM10: 3.38 μg/m3
Carbon Monoxide: 118.68 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 76 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

Special Weather Statement issued May 30 at 1:24AM CDT by NWS Duluth MN

Effective: Sat May 30, 2026, 1:24 AM
Expires: Sat May 30, 2026, 8:00 PM

Dry conditions and breezy winds will lead to near critical fire weather conditions today. Southeast winds of 10 to 12 mph with gusts of 20 mph are forecast today and this evening. Minimum relative humidity values of 22 to 28 percent are also expected. Together, these conditions could lead to the rapid spread of fires. 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.


Saturday, May 30, 2026

Weather Forecast

Sunny
62.6°F
53.1°F
57.7°F
40%
0 in
0%
0%
15.2 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 2.91 μg/m3
PM10: 3.32 μg/m3
Carbon Monoxide: 120.22 μg/m3
Nitrogen Dioxide: 1.09 μg/m3
Sulphur Dioxide: 0.82 μg/m3
Ozone: 77.08 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
59°F
44.5°F
53.6°F
56%
0 in
0%
0%
9.2 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

Partly Cloudy
54.6°F
49.4°F
51.8°F
61%
0 in
0%
0%
9.8 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
57.2°F
46.4°F
51.7°F
76%
0 in
0%
0%
9.8 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

Sunny
60.8°F
48.9°F
54.2°F
74%
0 in
0%
0%
8.5 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 5.2 μg/m3
PM10: 6.48 μg/m3
Carbon Monoxide: 123.13 μg/m3
Nitrogen Dioxide: 1.01 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 77 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

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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