Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

50.5°F

Measurement Time: Friday, November 28, 2025, 2:18 AM CST

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

28°F
Light freezing rain
Light freezing rain
16.5°F
28.7°F
88%
ENE 15 mph
19.4 mph
17.3°F
27.6°F
0 in
0%
6 mi
1020 mbar
0

Five Day Weather Forecast

Light freezing rain
Wed
H: 34°F
L: 22°F
Light freezing rain
Thu
H: 19°F
L: 9°F
Mist
Fri
H: 34°F
L: 21°F
Cloudy
Sat
H: 36°F
L: 23°F
Partly Cloudy
Sun
H: 36°F
L: 30°F

Air Quality

AQI: 1 - Good
PM2.5: 1.48 μg/m3
PM10: 1.58 μg/m3
Carbon Monoxide: 173.68 μg/m3
Nitrogen Dioxide: 0.88 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 12:13 AM
Sunset: 5:51 PM
Daylight: 11 hrs 14 mins
Moonrise: 7:36 PM
Moon Transit: 12:46 AM
Moonset: 6:56 AM
Moon Phase: Full
Moon Illumination: 98.2%

Best Times for Fishing or Hunting

Major Periods

12:16 AM - 2:46 AM
12:35 AM - 3:05 PM

Minor Periods

7:06 PM - 8:36 PM
6:26 AM - 7:56 AM

Action Rating: 4 out of 5

Dense Fog Advisory issued March 4 at 6:05PM CST until March 5 at 12:00PM CST by NWS Duluth MN

Effective: Wed March 4, 2026, 6:05 PM
Expires: Thu March 5, 2026, 12:00 PM

* WHAT...Visibility less than one quarter to one half mile in dense fog. * WHERE...Itasca, Central St. Louis, and Northern Cook and Lake Counties. This includes the Tribal Lands of the Bois Forte Band, Lake Vermilion and, Deer Creek areas. This also includes the Boundary Waters eastern and central area. * WHEN...From midnight tonight to noon CST Thursday. * 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.


Dense Fog Advisory issued March 4 at 6:05PM CST until March 5 at 12:00PM CST by NWS Duluth MN

Effective: Wed March 4, 2026, 6:05 PM
Expires: Thu March 5, 2026, 12:00 PM

* WHAT...Visibility less than one quarter to one half mile in dense fog. * WHERE...Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation. * WHEN...Until noon CST Thursday. * 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.
Wednesday, March 4, 2026

Weather Forecast

Light freezing rain
33.6°F
21.7°F
30.1°F
86%
0.01 in
77%
27%
17.7 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 11.83 μg/m3
PM10: 12.49 μg/m3
Carbon Monoxide: 193.2 μg/m3
Nitrogen Dioxide: 3.18 μg/m3
Sulphur Dioxide: 0.83 μg/m3
Ozone: 68.64 μg/m3

Astronomical

Sunrise: 6:36 AM
Sun Transit: 12:13 AM
Sunset: 5:51 PM
Daylight: 11 hrs 14 mins
Moonrise: 7:36 PM
Moon Transit: 12:46 AM
Moonset: 6:56 AM
Moon Phase: Full
Moon Illumination: 98.2%

Best Times for Fishing or Hunting

Major Periods

12:16 AM - 2:46 AM
12:35 AM - 3:05 PM

Minor Periods

7:06 PM - 8:36 PM
6:26 AM - 7:56 AM

Action Rating: 4 out of 5

Thursday, March 5, 2026

Weather Forecast

Light freezing rain
18.9°F
9.1°F
16.5°F
85%
0.01 in
71%
20%
16.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.82 μg/m3
PM10: 2 μg/m3
Carbon Monoxide: 171.16 μg/m3
Nitrogen Dioxide: 1.03 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 82.8 μg/m3

Astronomical

Sunrise: 6:34 AM
Sun Transit: 12:12 AM
Sunset: 5:52 PM
Daylight: 11 hrs 18 mins
Moonrise: 8:47 PM
Moon Transit: 1:29 AM
Moonset: 7:11 AM
Moon Phase: Full
Moon Illumination: 94.0%

Best Times for Fishing or Hunting

Major Periods

12:59 AM - 3:29 AM
1:18 PM - 3:48 PM

Minor Periods

8:17 PM - 9:47 PM
6:41 AM - 8:11 AM

Action Rating: 4 out of 5

Friday, March 6, 2026

Weather Forecast

Mist
34°F
21°F
29.6°F
95%
0.46 in
88%
20%
9.4 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.36 μg/m3
PM10: 3.71 μg/m3
Carbon Monoxide: 193.64 μg/m3
Nitrogen Dioxide: 2.02 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 79.48 μg/m3

Astronomical

Sunrise: 6:32 AM
Sun Transit: 12:12 AM
Sunset: 5:54 PM
Daylight: 11 hrs 21 mins
Moonrise: 9:58 PM
Moon Transit: 2:12 AM
Moonset: 7:26 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

1:42 AM - 4:12 AM
2:01 PM - 4:31 PM

Minor Periods

9:28 PM - 10:58 PM
6:56 AM - 8:26 AM

Action Rating: 3 out of 5

Saturday, March 7, 2026

Weather Forecast

Cloudy
36°F
22.6°F
29.1°F
77%
0 in
0%
0%
22.8 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 1.65 μg/m3
PM10: 1.85 μg/m3
Carbon Monoxide: 184.09 μg/m3
Nitrogen Dioxide: 1.79 μg/m3
Sulphur Dioxide: 0.91 μg/m3
Ozone: 83.12 μg/m3

Astronomical

Sunrise: 6:30 AM
Sun Transit: 12:00 AM
Sunset: 5:55 PM
Daylight: 11 hrs 25 mins
Moonrise: 11:09 PM
Moon Transit: 2:56 AM
Moonset: 7:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.2%

Best Times for Fishing or Hunting

Major Periods

2:26 AM - 4:56 AM
2:45 PM - 5:15 PM

Minor Periods

12:00 AM - 12:00 AM
7:13 AM - 8:43 AM

Action Rating: 2 out of 5

Sunday, March 8, 2026

Weather Forecast

Partly Cloudy
35.8°F
29.6°F
32.5°F
90%
0 in
0%
0%
18.6 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 2.57 μg/m3
PM10: 3.13 μg/m3
Carbon Monoxide: 165.1 μg/m3
Nitrogen Dioxide: 2.08 μg/m3
Sulphur Dioxide: 1.36 μg/m3
Ozone: 96.31 μg/m3

Astronomical

Sunrise: 6:28 AM
Sun Transit: 12:00 AM
Sunset: 5:57 PM
Daylight: 11 hrs 28 mins
Moonrise: 12:09 AM
Moon Transit: 3:41 AM
Moonset: 8:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 69.3%

Best Times for Fishing or Hunting

Major Periods

3:11 AM - 5:41 AM
3:31 PM - 6:01 PM

Minor Periods

7:35 AM - 9:05 AM
12:00 AM - 12:00 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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