Water Temperature of Lake Superior in Grand Marais, MN

Current Water Temperature

38.0°F

Measurement Time: Saturday, April 18, 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

26.1°F
Sunny
Sunny
14.3°F
23.3°F
52%
NNW 14.1 mph
16.2 mph
11.8°F
7.8°F
0 in
0%
6 mi
1019 mbar
1.1

Five Day Weather Forecast

Sunny
Sun
H: 36°F
L: 22°F
Overcast
Mon
H: 35°F
L: 24°F
Sunny
Tue
H: 47°F
L: 32°F
Patchy rain nearby
Wed
H: 46°F
L: 31°F
Patchy rain nearby
Thu
H: 49°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 3.18 μg/m3
PM10: 4.28 μg/m3
Carbon Monoxide: 170.68 μg/m3
Nitrogen Dioxide: 0.78 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 98 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:00 PM
Sunset: 7:57 PM
Daylight: 13 hrs 52 mins
Moonrise: 6:47 AM
Moon Transit: 3:06 PM
Moonset: 11:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:36 PM - 5:06 PM

Minor Periods

12:00 AM - 12:00 AM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Sunday, April 19, 2026

Weather Forecast

Sunny
36°F
21.9°F
28°F
46%
0 in
0%
0%
14.1 mph
4.3


Air Quality

AQI: 1 - Good
PM2.5: 3.13 μg/m3
PM10: 4.03 μg/m3
Carbon Monoxide: 174.56 μg/m3
Nitrogen Dioxide: 0.87 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 95.68 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:00 PM
Sunset: 7:57 PM
Daylight: 13 hrs 52 mins
Moonrise: 6:47 AM
Moon Transit: 3:06 PM
Moonset: 11:41 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

2:02 AM - 4:32 AM
2:36 PM - 5:06 PM

Minor Periods

12:00 AM - 12:00 AM
6:17 AM - 7:47 AM

Action Rating: 3 out of 5

Monday, April 20, 2026

Weather Forecast

Overcast
35°F
24.3°F
30.3°F
59%
0 in
0%
0%
12.8 mph
3.8


Air Quality

AQI: 1 - Good
PM2.5: 3.87 μg/m3
PM10: 4.79 μg/m3
Carbon Monoxide: 168.6 μg/m3
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 92.32 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:00 PM
Sunset: 7:59 PM
Daylight: 13 hrs 56 mins
Moonrise: 7:30 AM
Moon Transit: 4:10 PM
Moonset: 12:41 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

3:05 AM - 5:35 AM
3:40 PM - 6:10 PM

Minor Periods

7:00 AM - 8:30 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, April 21, 2026

Weather Forecast

Sunny
47.4°F
31.8°F
38°F
72%
0 in
0%
0%
9.4 mph
5.5


Air Quality

AQI: 1 - Good
PM2.5: 5.92 μg/m3
PM10: 7.1 μg/m3
Carbon Monoxide: 174.92 μg/m3
Nitrogen Dioxide: 2.31 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 87.8 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:00 PM
Sunset: 8:00 PM
Daylight: 13 hrs 59 mins
Moonrise: 8:30 AM
Moon Transit: 5:15 PM
Moonset: 12:57 AM
Moon Phase: Waxing Crescent
Moon Illumination: 18.8%

Best Times for Fishing or Hunting

Major Periods

4:10 AM - 6:40 AM
4:45 PM - 7:15 PM

Minor Periods

8:00 AM - 9:30 AM
12:27 AM - 1:57 AM

Action Rating: 2 out of 5

Wednesday, April 22, 2026

Weather Forecast

Patchy rain nearby
46.3°F
30.7°F
38.5°F
67%
0.01 in
73%
0%
13.2 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 2.89 μg/m3
PM10: 4.08 μg/m3
Carbon Monoxide: 150.31 μg/m3
Nitrogen Dioxide: 2.7 μg/m3
Sulphur Dioxide: 0.83 μg/m3
Ozone: 91.4 μg/m3

Astronomical

Sunrise: 5:59 AM
Sun Transit: 1:00 PM
Sunset: 8:01 PM
Daylight: 14 hrs 2 mins
Moonrise: 9:42 AM
Moon Transit: 6:17 PM
Moonset: 1:57 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

5:14 AM - 7:44 AM
5:47 PM - 8:17 PM

Minor Periods

9:12 AM - 10:42 AM
1:27 AM - 2:57 AM

Action Rating: 3 out of 5

Thursday, April 23, 2026

Weather Forecast

Patchy rain nearby
49.1°F
39.1°F
42.8°F
93%
0.12 in
89%
0%
14.8 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 3.18 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 152.74 μg/m3
Nitrogen Dioxide: 2.42 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 94.69 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 1:00 PM
Sunset: 8:03 PM
Daylight: 14 hrs 6 mins
Moonrise: 11:02 AM
Moon Transit: 7:15 PM
Moonset: 2:41 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

6:14 AM - 8:44 AM
6:45 PM - 9:15 PM

Minor Periods

10:32 AM - 12:02 AM
2:11 AM - 3:41 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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