Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

41.0°F

Measurement Time: Wednesday, December 31, 2025, 6:20 AM CST

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

3°F
Sunny
Sunny
-12.6°F
-1.1°F
59%
WNW 10.5 mph
15.6 mph
-14.2°F
-14.1°F
0 in
0%
6 mi
1012 mbar
0.2

Five Day Weather Forecast

Sunny
Fri
H: 11°F
L: -2°F
Overcast
Sat
H: 21°F
L: 12°F
Moderate snow
Sun
H: 21°F
L: 10°F
Light freezing rain
Mon
H: 22°F
L: 10°F
Moderate snow
Tue
H: 34°F
L: 18°F

Air Quality

AQI: 1 - Good
PM2.5: 1.38 μg/m3
PM10: 1.58 μg/m3
Carbon Monoxide: 148.68 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:05 AM
Sunset: 4:21 PM
Daylight: 8 hrs 31 mins
Moonrise: 3:12 PM
Moon Transit: 11:56 PM
Moonset: 7:37 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

10:51 AM - 1:21 PM
12:00 AM - 12:00 AM

Minor Periods

2:42 PM - 4:12 PM
7:07 AM - 8:37 AM

Action Rating: 4 out of 5

Friday, January 2, 2026

Weather Forecast

Sunny
11.3°F
-1.5°F
4.9°F
55%
0 in
0%
0%
12.3 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.47 μg/m3
PM10: 1.68 μg/m3
Carbon Monoxide: 148.16 μg/m3
Nitrogen Dioxide: 1.64 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 76.44 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:05 AM
Sunset: 4:21 PM
Daylight: 8 hrs 31 mins
Moonrise: 3:12 PM
Moon Transit: 11:56 PM
Moonset: 7:37 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

10:51 AM - 1:21 PM
12:00 AM - 12:00 AM

Minor Periods

2:42 PM - 4:12 PM
7:07 AM - 8:37 AM

Action Rating: 4 out of 5

Saturday, January 3, 2026

Weather Forecast

Overcast
21.2°F
12.2°F
14.7°F
69%
0 in
0%
0%
10.1 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.71 μg/m3
PM10: 1.83 μg/m3
Carbon Monoxide: 152.36 μg/m3
Nitrogen Dioxide: 1.93 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 77.84 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:05 AM
Sunset: 4:22 PM
Daylight: 8 hrs 32 mins
Moonrise: 4:33 PM
Moon Transit: 12:00 AM
Moonset: 8:32 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:56 AM - 2:26 PM

Minor Periods

4:03 PM - 5:33 PM
8:02 AM - 9:32 AM

Action Rating: 5 out of 5

Sunday, January 4, 2026

Weather Forecast

Moderate snow
21°F
9.7°F
14.4°F
78%
0.05 in
76%
9%
9.8 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.51 μg/m3
PM10: 1.63 μg/m3
Carbon Monoxide: 152.12 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 74.92 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:06 AM
Sunset: 4:23 PM
Daylight: 8 hrs 34 mins
Moonrise: 5:58 PM
Moon Transit: 1:00 AM
Moonset: 9:11 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
12:57 AM - 3:27 PM

Minor Periods

5:28 PM - 6:58 PM
8:41 AM - 10:11 AM

Action Rating: 3 out of 5

Monday, January 5, 2026

Weather Forecast

Light freezing rain
22.4°F
10.4°F
16°F
91%
0.05 in
83%
76%
5.4 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 2.79 μg/m3
PM10: 2.85 μg/m3
Carbon Monoxide: 162.04 μg/m3
Nitrogen Dioxide: 2.98 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 67.52 μg/m3

Astronomical

Sunrise: 7:50 AM
Sun Transit: 12:06 AM
Sunset: 4:24 PM
Daylight: 8 hrs 35 mins
Moonrise: 7:21 PM
Moon Transit: 1:57 AM
Moonset: 9:39 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:27 AM - 3:57 AM
1:51 PM - 4:21 PM

Minor Periods

6:51 PM - 8:21 PM
9:09 AM - 10:39 AM

Action Rating: 4 out of 5

Tuesday, January 6, 2026

Weather Forecast

Moderate snow
33.6°F
18°F
25.4°F
92%
0.04 in
81%
57%
11.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.33 μg/m3
PM10: 7.42 μg/m3
Carbon Monoxide: 227.47 μg/m3
Nitrogen Dioxide: 5.5 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 41 μg/m3

Astronomical

Sunrise: 7:49 AM
Sun Transit: 12:07 AM
Sunset: 4:26 PM
Daylight: 8 hrs 36 mins
Moonrise: 8:41 PM
Moon Transit: 2:49 AM
Moonset: 10:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:19 AM - 4:49 AM
2:41 PM - 5:11 PM

Minor Periods

8:11 PM - 9:41 PM
9:30 AM - 11:00 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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