Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Sunday, May 24, 2026, 4:00 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

39.9°F
Partly Cloudy
Partly Cloudy
35.8°F
50.6°F
89%
SW 5.8 mph
12.2 mph
48.4°F
43.8°F
0 in
0%
6 mi
1015 mbar
2.7

Five Day Weather Forecast

Partly Cloudy
Sun
H: 53°F
L: 42°F
Patchy rain nearby
Mon
H: 60°F
L: 47°F
Sunny
Tue
H: 64°F
L: 48°F
Sunny
Wed
H: 58°F
L: 49°F
Sunny
Thu
H: 55°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 5.88 μg/m3
PM10: 6.48 μg/m3
Carbon Monoxide: 132.68 μg/m3
Nitrogen Dioxide: 2.38 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 89 μg/m3

Astronomical

Sunrise: 5:13 AM
Sun Transit: 12:58 AM
Sunset: 8:44 PM
Daylight: 15 hrs 31 mins
Moonrise: 2:00 PM
Moon Transit: 8:22 PM
Moonset: 2:16 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
7:52 PM - 10:22 PM

Minor Periods

1:30 PM - 3:00 PM
1:46 AM - 3:16 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Partly Cloudy
52.7°F
42.1°F
46.9°F
86%
0 in
0%
0%
10.5 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 5.43 μg/m3
PM10: 5.61 μg/m3
Carbon Monoxide: 137.64 μg/m3
Nitrogen Dioxide: 2.1 μg/m3
Sulphur Dioxide: 0.94 μg/m3
Ozone: 64.84 μg/m3

Astronomical

Sunrise: 5:13 AM
Sun Transit: 12:58 AM
Sunset: 8:44 PM
Daylight: 15 hrs 31 mins
Moonrise: 2:00 PM
Moon Transit: 8:22 PM
Moonset: 2:16 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

7:28 AM - 9:58 AM
7:52 PM - 10:22 PM

Minor Periods

1:30 PM - 3:00 PM
1:46 AM - 3:16 AM

Action Rating: 2 out of 5

Monday, May 25, 2026

Weather Forecast

Patchy rain nearby
59.8°F
46.7°F
53.4°F
88%
0.08 in
83%
0%
9.8 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 9.35 μg/m3
PM10: 10.3 μg/m3
Carbon Monoxide: 128.08 μg/m3
Nitrogen Dioxide: 2.18 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 79.92 μg/m3

Astronomical

Sunrise: 5:12 AM
Sun Transit: 12:58 AM
Sunset: 8:45 PM
Daylight: 15 hrs 33 mins
Moonrise: 3:10 PM
Moon Transit: 9:04 PM
Moonset: 2:32 AM
Moon Phase: First Quarter
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

8:10 AM - 10:40 AM
8:34 PM - 11:04 PM

Minor Periods

2:40 PM - 4:10 PM
2:02 AM - 3:32 AM

Action Rating: 3 out of 5

Tuesday, May 26, 2026

Weather Forecast

Sunny
63.7°F
47.8°F
54.7°F
71%
0 in
0%
0%
10.7 mph
5.8


Air Quality

AQI: 1 - Good
PM2.5: 9.32 μg/m3
PM10: 9.95 μg/m3
Carbon Monoxide: 134.88 μg/m3
Nitrogen Dioxide: 2.45 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 90.88 μg/m3

Astronomical

Sunrise: 5:11 AM
Sun Transit: 12:58 AM
Sunset: 8:46 PM
Daylight: 15 hrs 35 mins
Moonrise: 4:20 PM
Moon Transit: 9:46 PM
Moonset: 2:46 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

8:52 AM - 11:22 AM
9:16 PM - 11:46 PM

Minor Periods

3:50 PM - 5:20 PM
2:16 AM - 3:46 AM

Action Rating: 3 out of 5

Wednesday, May 27, 2026

Weather Forecast

Sunny
58.2°F
48.9°F
53°F
71%
0 in
0%
0%
11.2 mph
6.9


Air Quality

AQI: 1 - Good
PM2.5: 4.62 μg/m3
PM10: 5 μg/m3
Carbon Monoxide: 127.36 μg/m3
Nitrogen Dioxide: 1.48 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 80.52 μg/m3

Astronomical

Sunrise: 5:11 AM
Sun Transit: 12:58 AM
Sunset: 8:47 PM
Daylight: 15 hrs 37 mins
Moonrise: 5:29 PM
Moon Transit: 10:29 PM
Moonset: 3:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

9:34 AM - 12:04 AM
12:00 AM - 12:00 AM

Minor Periods

4:59 PM - 6:29 PM
2:32 AM - 4:02 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Sunny
54.8°F
43.8°F
50.5°F
68%
0 in
0%
0%
10.7 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 2.22 μg/m3
PM10: 2.37 μg/m3
Carbon Monoxide: 123.06 μg/m3
Nitrogen Dioxide: 1.55 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 68.23 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

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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