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

55.9°F
Sunny
Sunny
56.6°F
65.3°F
75%
ENE 2.7 mph
5.6 mph
65.3°F
53°F
0 in
0%
6 mi
1020 mbar
0.2

Five Day Weather Forecast

Smoky haze
Thu
H: 72°F
L: 58°F
Light rain shower
Fri
H: 66°F
L: 57°F
Fog
Sat
H: 66°F
L: 57°F
Patchy rain nearby
Sun
H: 70°F
L: 57°F
Sunny
Mon
H: 70°F
L: 58°F

Air Quality

AQI: 2 - Moderate
PM2.5: 27 μg/m3
PM10: 28.1 μg/m3
Carbon Monoxide: 231 μg/m3
Nitrogen Dioxide: 2.1 μg/m3
Sulphur Dioxide: 0.9 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 1:07 PM
Sunset: 8:55 PM
Daylight: 15 hrs 35 mins
Moonrise: 8:03 AM
Moon Transit: 3:22 PM
Moonset: 10:24 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
2:52 PM - 5:22 PM

Minor Periods

9:54 PM - 11:24 PM
7:33 AM - 9:03 AM

Action Rating: 4 out of 5

Dense Smoke Advisory issued July 15 at 9:12PM EDT until July 16 at 11:00AM EDT by NWS Marquette MI

Effective: Wed July 15, 2026, 8:12 PM
Expires: Thu July 16, 2026, 8:15 AM

* WHAT...Dense smoke will reduce visibility to less than one nautical mile. * WHERE...Portions of Central, Eastern and Western Lake Superior. * WHEN...Until 11 AM EDT /10 AM CDT/ Thursday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Thursday, July 16, 2026

Weather Forecast

Smoky haze
72.3°F
58.2°F
64.5°F
66%
0 in
5%
0%
7.2 mph
0.4


Air Quality

AQI: 2 - Moderate
PM2.5: 37 μg/m3
PM10: 38.06 μg/m3
Carbon Monoxide: 187.88 μg/m3
Nitrogen Dioxide: 3.78 μg/m3
Sulphur Dioxide: 1.38 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 1:07 PM
Sunset: 8:55 PM
Daylight: 15 hrs 35 mins
Moonrise: 8:03 AM
Moon Transit: 3:22 PM
Moonset: 10:24 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

2:24 AM - 4:54 AM
2:52 PM - 5:22 PM

Minor Periods

9:54 PM - 11:24 PM
7:33 AM - 9:03 AM

Action Rating: 4 out of 5

Friday, July 17, 2026

Weather Forecast

Light rain shower
66.4°F
57.2°F
60.4°F
94%
1.03 in
89%
0%
11.6 mph
1.8


Air Quality

AQI: 1 - Good
PM2.5: 11.87 μg/m3
PM10: 12.22 μg/m3
Carbon Monoxide: 146 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 78.83 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 1:07 PM
Sunset: 8:54 PM
Daylight: 15 hrs 33 mins
Moonrise: 9:24 AM
Moon Transit: 4:11 PM
Moonset: 10:42 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

3:14 AM - 5:44 AM
3:41 PM - 6:11 PM

Minor Periods

10:12 PM - 11:42 PM
8:54 AM - 10:24 AM

Action Rating: 3 out of 5

Saturday, July 18, 2026

Weather Forecast

Fog
66.1°F
56.9°F
60.1°F
93%
0.05 in
73%
0%
6.5 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 12.44 μg/m3
PM10: 12.54 μg/m3
Carbon Monoxide: 183 μg/m3
Nitrogen Dioxide: 1.2 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 101.63 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

Patchy rain nearby
69.6°F
56.7°F
61.6°F
85%
0.01 in
40%
0%
9.4 mph
0.1


Air Quality

AQI: 3 - Unhealthy for Sensitive Groups
PM2.5: 49.82 μg/m3
PM10: 51.08 μg/m3
Carbon Monoxide: 242.99 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 118.96 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

Sunny
69.9°F
58.1°F
63.1°F
69%
0.06 in
57%
0%
20.1 mph
5


Air Quality

AQI: 2 - Moderate
PM2.5: 17.16 μg/m3
PM10: 17.29 μg/m3
Carbon Monoxide: 354.25 μg/m3
Nitrogen Dioxide: 1.09 μg/m3
Sulphur Dioxide: 0.71 μg/m3
Ozone: 113.25 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

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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