Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

43.0°F

Measurement Time: Tuesday, May 26, 2026, 6:00 PM 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

50.4°F
Clear
Clear
50.8°F
58.8°F
89%
E 2.2 mph
2.8 mph
58.2°F
41.3°F
0 in
0%
6 mi
1015 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 68°F
L: 50°F
Sunny
Wed
H: 57°F
L: 43°F
Sunny
Thu
H: 55°F
L: 42°F
Patchy rain nearby
Fri
H: 66°F
L: 46°F
Sunny
Sat
H: 57°F
L: 46°F

Air Quality

AQI: 1 - Good
PM2.5: 6.48 μg/m3
PM10: 6.98 μg/m3
Carbon Monoxide: 117.68 μg/m3
Nitrogen Dioxide: 2.18 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 56 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

Special Weather Statement issued May 26 at 1:21PM CDT by NWS Duluth MN

Effective: Tue May 26, 2026, 1:21 PM
Expires: Tue May 26, 2026, 8:00 PM

Dry conditions are forecast this afternoon for portions areas of northeast Minnesota north of a line from Walker to Cloquet to Silver Bay. Relative humidity values between 15 and 25 percent will lead to near-critical fire weather conditions today. East winds of 5 to 10 mph with gusts up to 15 mph are forecast. Together, these conditions may cause fires to spread. Check burning restrictions and fire danger before burning. For more information on burning restrictions for Minnesota, see www.dnr.state.mn.us/forestry/fire/firerating_restrictions.html.


Tuesday, May 26, 2026

Weather Forecast

Sunny
67.5°F
49.6°F
59.6°F
59%
0 in
0%
0%
8.1 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 6.24 μg/m3
PM10: 6.85 μg/m3
Carbon Monoxide: 123.6 μg/m3
Nitrogen Dioxide: 1.71 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 82.64 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
56.8°F
42.8°F
53.1°F
64%
0 in
0%
0%
9.4 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 4.39 μg/m3
PM10: 4.7 μg/m3
Carbon Monoxide: 118.08 μg/m3
Nitrogen Dioxide: 1.79 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 68.24 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

Sunny
54.9°F
41.5°F
48.4°F
71%
0 in
0%
0%
6 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 3.84 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 115.96 μg/m3
Nitrogen Dioxide: 2.09 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 65.32 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

Friday, May 29, 2026

Weather Forecast

Patchy rain nearby
66.3°F
46°F
54.6°F
79%
0.04 in
76%
0%
12.1 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 3.77 μg/m3
PM10: 4.35 μg/m3
Carbon Monoxide: 123 μg/m3
Nitrogen Dioxide: 2.43 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 67.16 μg/m3

Astronomical

Sunrise: 5:09 AM
Sun Transit: 12:58 AM
Sunset: 8:49 PM
Daylight: 15 hrs 40 mins
Moonrise: 7:48 PM
Moon Transit: 12:00 AM
Moonset: 3:40 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:04 AM - 1:34 PM

Minor Periods

7:18 PM - 8:48 PM
3:10 AM - 4:40 AM

Action Rating: 4 out of 5

Saturday, May 30, 2026

Weather Forecast

Sunny
57.3°F
46.1°F
51.6°F
66%
0 in
0%
0%
14.8 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 3.69 μg/m3
PM10: 4.49 μg/m3
Carbon Monoxide: 129.06 μg/m3
Nitrogen Dioxide: 1.89 μg/m3
Sulphur Dioxide: 0.84 μg/m3
Ozone: 66.54 μg/m3

Astronomical

Sunrise: 5:08 AM
Sun Transit: 12:58 AM
Sunset: 8:50 PM
Daylight: 15 hrs 42 mins
Moonrise: 8:55 PM
Moon Transit: 12:00 AM
Moonset: 4:07 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:52 AM - 2:22 PM

Minor Periods

8:25 PM - 9:55 PM
3:37 AM - 5:07 AM

Action Rating: 5 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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