Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

40.0°F

Measurement Time: Friday, March 27, 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

25°F
Overcast
Overcast
12.5°F
23.4°F
44%
NW 15.2 mph
17.5 mph
10.8°F
10.3°F
0 in
0%
6 mi
1030 mbar
2.1

Five Day Weather Forecast

Light freezing rain
Fri
H: 24°F
L: 19°F
Moderate or heavy snow showers
Sat
H: 32°F
L: 15°F
Mist
Sun
H: 37°F
L: 14°F
Light freezing rain
Mon
H: 35°F
L: 25°F
Moderate or heavy freezing rain
Tue
H: 33°F
L: 25°F

Air Quality

AQI: 1 - Good
PM2.5: 3.88 μg/m3
PM10: 4.88 μg/m3
Carbon Monoxide: 208.68 μg/m3
Nitrogen Dioxide: 1.28 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 102 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:06 PM
Sunset: 7:24 PM
Daylight: 12 hrs 34 mins
Moonrise: 1:13 PM
Moon Transit: 9:19 PM
Moonset: 4:40 AM
Moon Phase: First Quarter
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

8:19 AM - 10:49 AM
8:49 PM - 11:19 PM

Minor Periods

12:43 AM - 2:13 PM
4:10 AM - 5:40 AM

Action Rating: 2 out of 5

Friday, March 27, 2026

Weather Forecast

Light freezing rain
23.9°F
19°F
21.6°F
57%
0 in
86%
12%
15.7 mph
0.7


Air Quality

AQI: 1 - Good
PM2.5: 3.17 μg/m3
PM10: 4.24 μg/m3
Carbon Monoxide: 201.04 μg/m3
Nitrogen Dioxide: 1.01 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 94.6 μg/m3

Astronomical

Sunrise: 6:50 AM
Sun Transit: 1:06 PM
Sunset: 7:24 PM
Daylight: 12 hrs 34 mins
Moonrise: 1:13 PM
Moon Transit: 9:19 PM
Moonset: 4:40 AM
Moon Phase: First Quarter
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

8:19 AM - 10:49 AM
8:49 PM - 11:19 PM

Minor Periods

12:43 AM - 2:13 PM
4:10 AM - 5:40 AM

Action Rating: 2 out of 5

Saturday, March 28, 2026

Weather Forecast

Moderate or heavy snow showers
31.8°F
14.9°F
23.3°F
72%
0.08 in
73%
3%
9.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 3.96 μg/m3
PM10: 4.94 μg/m3
Carbon Monoxide: 205.36 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 96.6 μg/m3

Astronomical

Sunrise: 6:48 AM
Sun Transit: 1:06 PM
Sunset: 7:26 PM
Daylight: 12 hrs 38 mins
Moonrise: 2:34 PM
Moon Transit: 10:10 PM
Moonset: 5:08 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 77.5%

Best Times for Fishing or Hunting

Major Periods

9:12 AM - 11:42 AM
12:00 AM - 12:00 AM

Minor Periods

2:04 PM - 3:34 PM
4:38 AM - 6:08 AM

Action Rating: 2 out of 5

Sunday, March 29, 2026

Weather Forecast

Mist
36.5°F
14.2°F
26.2°F
91%
0 in
0%
0%
9.2 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 3.38 μg/m3
PM10: 3.76 μg/m3
Carbon Monoxide: 197.68 μg/m3
Nitrogen Dioxide: 1.87 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 88.76 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 1:06 PM
Sunset: 7:27 PM
Daylight: 12 hrs 41 mins
Moonrise: 3:51 PM
Moon Transit: 10:57 PM
Moonset: 5:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

10:01 AM - 12:31 AM
12:00 AM - 12:00 AM

Minor Periods

3:21 PM - 4:51 PM
4:59 AM - 6:29 AM

Action Rating: 3 out of 5

Monday, March 30, 2026

Weather Forecast

Light freezing rain
34.7°F
25°F
29.7°F
92%
0.01 in
75%
9%
19 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.66 μg/m3
PM10: 4.15 μg/m3
Carbon Monoxide: 179.05 μg/m3
Nitrogen Dioxide: 1.73 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 89.4 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:05 PM
Sunset: 7:28 PM
Daylight: 12 hrs 45 mins
Moonrise: 5:06 PM
Moon Transit: 11:41 PM
Moonset: 5:47 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

10:47 AM - 1:17 PM
12:00 AM - 12:00 AM

Minor Periods

4:36 PM - 6:06 PM
5:17 AM - 6:47 AM

Action Rating: 3 out of 5

Tuesday, March 31, 2026

Weather Forecast

Moderate or heavy freezing rain
32.6°F
25.1°F
29.7°F
94%
0.23 in
64%
68%
19.9 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 3.15 μg/m3
PM10: 3.95 μg/m3
Carbon Monoxide: 165.58 μg/m3
Nitrogen Dioxide: 1.01 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 101.69 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:05 PM
Sunset: 7:30 PM
Daylight: 12 hrs 48 mins
Moonrise: 6:19 PM
Moon Transit: 12:00 AM
Moonset: 6:02 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:30 AM - 2:00 PM

Minor Periods

5:49 PM - 7:19 PM
5:32 AM - 7:02 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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