Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

42.8°F

Measurement Time: Sunday, May 24, 2026, 6:18 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

39°F
Fog
Fog
35.5°F
42.7°F
96%
W 4.7 mph
9.5 mph
39.9°F
42.9°F
0 in
0%
0 mi
1015 mbar
0.4

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 51°F
L: 42°F
Patchy rain nearby
Mon
H: 57°F
L: 44°F
Patchy rain nearby
Tue
H: 68°F
L: 50°F
Sunny
Wed
H: 58°F
L: 48°F
Moderate rain
Thu
H: 61°F
L: 46°F

Air Quality

AQI: 1 - Good
PM2.5: 4.48 μg/m3
PM10: 4.48 μg/m3
Carbon Monoxide: 133.68 μg/m3
Nitrogen Dioxide: 2.08 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 52 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

Dense Fog Advisory issued May 24 at 12:44AM CDT until May 24 at 10:00AM CDT by NWS Duluth MN

Effective: Sun May 24, 2026, 12:44 AM
Expires: Sun May 24, 2026, 10:00 AM

* WHAT...Visibility less than one quarter mile in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Grand Portage Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Fond du Lac Band, the Lac Courte Oreilles Reservation, the Mille Lacs Band, Hinckley, Lena Lake, Big Sandy Lake and, East Lake areas and the Bois Forte Band, Lake Vermilion, Deer Creek and, Nett Lake areas. Other locations including the Apostle Islands National Lakeshore and Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Sunday, May 24, 2026

Weather Forecast

Patchy rain nearby
51.1°F
42.1°F
45.9°F
94%
0.1 in
79%
0%
8.9 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
56.7°F
43.9°F
50.3°F
89%
0.13 in
89%
0%
5.8 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

Patchy rain nearby
67.5°F
49.6°F
57.3°F
80%
0.09 in
89%
0%
6.7 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°F
53.1°F
84%
0 in
0%
0%
9.4 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

Moderate rain
61.2°F
45.5°F
52.3°F
82%
0.39 in
64%
0%
7.4 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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