Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

44.2°F

Measurement Time: Monday, June 8, 2026, 2:18 AM CDT

Temperature Locations

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Local Points of Interest

Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal Arena

Grand Marais Harbor

Station Name: 9099090 - Grand Marais, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 617 feet

Nearest Address:
391 MN-61
Grand Marais, MN 55604
Cook County

GPS Coordinates: 47.749, -90.341

Nearby Water Temperatures

Lake Superior, Grand Marais, MN (0.6 mi)
Poplar River, Lutsen, MN (18.8 mi)
Grand Portage River, Grand Portage, MN (33.9 mi)
Lake Superior, Lake Superior, MI (38.4 mi)
Baptism River, Illgen City, MN (49.1 mi)
Kawishiwi River, Ely, MN (56.7 mi)
Washington Creek, Windigo, MI (56.7 mi)
Dunka River, Babbitt, MN (70.8 mi)
Dunka River, Babbitt, MN (71.1 mi)
Partrige River, Babbitt, MN (74.2 mi)
Lake Superior, Two Harbors, MN (79.9 mi)
Saint Louis River, Hoyt Lakes, MN (81.3 mi)
Chequamegon Bay, Ashland, WI (81.3 mi)
Presque Isle River, Tula, MI (87.2 mi)
Lake Superior, Calumet, MI (87.4 mi)

Weather for Grand Marais, Minnesota

Current Weather

52°F
Smoky haze
Smoky haze
49.6°F
64.8°F
86%
S 6.9 mph
10.8 mph
64.8°F
55.4°F
0 in
0%
4 mi
1015 mbar
0.7

Five Day Weather Forecast

Smoky haze
Sat
H: 69°F
L: 58°F
Smoky haze
Sun
H: 70°F
L: 56°F
Patchy rain nearby
Mon
H: 69°F
L: 55°F
Smoky haze
Tue
H: 66°F
L: 56°F
Sunny
Wed
H: 64°F
L: 48°F

Air Quality

AQI: 2 - Moderate
PM2.5: 60.5 μg/m3
PM10: 61 μg/m3
Carbon Monoxide: 719 μg/m3
Nitrogen Dioxide: 2.2 μg/m3
Sulphur Dioxide: 2.8 μg/m3
Ozone: 175 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 1:07 PM
Sunset: 8:53 PM
Daylight: 15 hrs 31 mins
Moonrise: 10:42 AM
Moon Transit: 4:56 PM
Moonset: 10:57 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:01 AM - 6:31 AM
4:26 PM - 6:56 PM

Minor Periods

10:27 PM - 11:57 PM
10:12 AM - 11:42 AM

Action Rating: 2 out of 5

Saturday, July 18, 2026

Weather Forecast

Smoky haze
69.3°F
58.1°F
64.6°F
70%
0 in
6%
0%
15 mph
0.7


Air Quality

AQI: 2 - Moderate
PM2.5: 35.23 μg/m3
PM10: 35.53 μg/m3
Carbon Monoxide: 468.83 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 128.13 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 1:07 PM
Sunset: 8:53 PM
Daylight: 15 hrs 31 mins
Moonrise: 10:42 AM
Moon Transit: 4:56 PM
Moonset: 10:57 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

4:01 AM - 6:31 AM
4:26 PM - 6:56 PM

Minor Periods

10:27 PM - 11:57 PM
10:12 AM - 11:42 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Smoky haze
70°F
56.3°F
63.2°F
73%
0.05 in
57%
0%
9.2 mph
6.7


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 63.38 μg/m3
PM10: 65.04 μg/m3
Carbon Monoxide: 271.67 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 128.17 μg/m3

Astronomical

Sunrise: 5:23 AM
Sun Transit: 1:07 PM
Sunset: 8:52 PM
Daylight: 15 hrs 29 mins
Moonrise: 11:55 AM
Moon Transit: 5:40 PM
Moonset: 11:13 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

4:45 AM - 7:15 AM
5:10 PM - 7:40 PM

Minor Periods

12:00 AM - 12:00 AM
11:25 AM - 12:55 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Patchy rain nearby
69.4°F
55.4°F
62.5°F
90%
1.24 in
88%
0%
16.8 mph
5.2


Air Quality

AQI: 1 - Good
PM2.5: 7.75 μg/m3
PM10: 7.98 μg/m3
Carbon Monoxide: 251.46 μg/m3
Nitrogen Dioxide: 1.11 μg/m3
Sulphur Dioxide: 0.39 μg/m3
Ozone: 106.92 μg/m3

Astronomical

Sunrise: 5:24 AM
Sun Transit: 1:07 PM
Sunset: 8:51 PM
Daylight: 15 hrs 27 mins
Moonrise: 1:07 PM
Moon Transit: 6:23 PM
Moonset: 12:13 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
5:53 PM - 8:23 PM

Minor Periods

12:37 AM - 2:07 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Smoky haze
66.1°F
55.8°F
62.7°F
70%
0 in
9%
0%
15 mph
6.7


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 40.58 μg/m3
PM10: 41.31 μg/m3
Carbon Monoxide: 675.54 μg/m3
Nitrogen Dioxide: 4.85 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 102.38 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:07 PM
Sunset: 8:50 PM
Daylight: 15 hrs 25 mins
Moonrise: 2:18 PM
Moon Transit: 7:07 PM
Moonset: 12:29 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
6:37 PM - 9:07 PM

Minor Periods

1:48 PM - 3:18 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
63.5°F
47.7°F
55.7°F
66%
0 in
6%
0%
12.3 mph
5


Air Quality

AQI: 2 - Moderate
PM2.5: 26.03 μg/m3
PM10: 26.76 μg/m3
Carbon Monoxide: 246.75 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 66.63 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:07 PM
Sunset: 8:49 PM
Daylight: 15 hrs 23 mins
Moonrise: 3:28 PM
Moon Transit: 7:53 PM
Moonset: 12:48 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

6:57 AM - 9:27 AM
7:23 PM - 9:53 PM

Minor Periods

2:58 PM - 4:28 PM
12:00 AM - 12:00 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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