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

50.5°F
Overcast
Overcast
46.5°F
47.8°F
71%
W 10.7 mph
16.1 mph
44.4°F
38.4°F
0 in
0%
6 mi
1010 mbar
0.3

Five Day Weather Forecast

Cloudy
Sun
H: 65°F
L: 47°F
Patchy rain nearby
Mon
H: 63°F
L: 43°F
Partly Cloudy
Tue
H: 55°F
L: 40°F
Patchy rain nearby
Wed
H: 59°F
L: 45°F
Patchy rain nearby
Thu
H: 56°F
L: 44°F

Air Quality

AQI: 1 - Good
PM2.5: 0.1 μg/m3
PM10: 0.2 μg/m3
Carbon Monoxide: 96 μg/m3
Nitrogen Dioxide: 0.3 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:01 PM
Sunset: 9:01 PM
Daylight: 15 hrs 59 mins
Moonrise: 3:55 AM
Moon Transit: 12:35 AM
Moonset: 9:21 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:05 AM - 2:35 PM

Minor Periods

8:51 PM - 10:21 PM
3:25 AM - 4:55 AM

Action Rating: 5 out of 5

Red Flag Warning issued June 13 at 12:46PM CDT until June 14 at 9:00PM CDT by NWS Duluth MN

Effective: Sat June 13, 2026, 12:46 PM
Expires: Sun June 14, 2026, 7:00 AM

The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 1 PM to 9 PM CDT Sunday. * AFFECTED AREA...In Minnesota, North St. Louis, Northern Cook and Lake, Central St. Louis and Southern Lake. * WINDS...Northwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 23 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued June 14 at 4:03AM CDT until June 14 at 9:00PM CDT by NWS Duluth MN

Effective: Sun June 14, 2026, 4:03 AM
Expires: Sun June 14, 2026, 4:15 PM

* AFFECTED AREA...In Minnesota, North St. Louis, Northern Cook and Lake, Central St. Louis and Southern Lake. * WINDS...Northwest 5 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 23 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Sunday, June 14, 2026

Weather Forecast

Cloudy
65.3°F
47.3°F
52.9°F
61%
0 in
8%
0%
16.8 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 1.55 μg/m3
PM10: 1.72 μg/m3
Carbon Monoxide: 97.13 μg/m3
Nitrogen Dioxide: 0.46 μg/m3
Sulphur Dioxide: 0.08 μg/m3
Ozone: 68.33 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:01 PM
Sunset: 9:01 PM
Daylight: 15 hrs 59 mins
Moonrise: 3:55 AM
Moon Transit: 12:35 AM
Moonset: 9:21 PM
Moon Phase: New
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:05 AM - 2:35 PM

Minor Periods

8:51 PM - 10:21 PM
3:25 AM - 4:55 AM

Action Rating: 5 out of 5

Monday, June 15, 2026

Weather Forecast

Patchy rain nearby
63°F
42.8°F
51.4°F
68%
0.05 in
57%
0%
12.1 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 1.43 μg/m3
PM10: 1.5 μg/m3
Carbon Monoxide: 101.25 μg/m3
Nitrogen Dioxide: 0.85 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 69.5 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:01 PM
Sunset: 9:02 PM
Daylight: 15 hrs 59 mins
Moonrise: 4:58 AM
Moon Transit: 1:43 PM
Moonset: 10:23 PM
Moon Phase: New
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

12:36 AM - 3:06 AM
1:13 PM - 3:43 PM

Minor Periods

9:53 PM - 11:23 PM
4:28 AM - 5:58 AM

Action Rating: 3 out of 5

Tuesday, June 16, 2026

Weather Forecast

Partly Cloudy
54.6°F
39.7°F
48.5°F
73%
0 in
10%
0%
10.5 mph
5.1


Air Quality

AQI: 1 - Good
PM2.5: 1.7 μg/m3
PM10: 1.78 μg/m3
Carbon Monoxide: 102.13 μg/m3
Nitrogen Dioxide: 1.78 μg/m3
Sulphur Dioxide: 0.16 μg/m3
Ozone: 49.54 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 6:16 AM
Moon Transit: 2:49 PM
Moonset: 11:07 PM
Moon Phase: New
Moon Illumination: 1.0%

Best Times for Fishing or Hunting

Major Periods

1:43 AM - 4:13 AM
2:19 PM - 4:49 PM

Minor Periods

12:00 AM - 12:00 AM
5:46 AM - 7:16 AM

Action Rating: 3 out of 5

Wednesday, June 17, 2026

Weather Forecast

Patchy rain nearby
58.5°F
45°F
50.9°F
71%
0.01 in
20%
0%
7.6 mph
5.6


Air Quality

AQI: 1 - Good
PM2.5: 1.35 μg/m3
PM10: 1.44 μg/m3
Carbon Monoxide: 100.17 μg/m3
Nitrogen Dioxide: 1.93 μg/m3
Sulphur Dioxide: 0.14 μg/m3
Ozone: 44.38 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:02 PM
Daylight: 16 hrs mins
Moonrise: 7:42 AM
Moon Transit: 3:49 PM
Moonset: 12:07 AM
Moon Phase: Waxing Crescent
Moon Illumination: 4.6%

Best Times for Fishing or Hunting

Major Periods

2:47 AM - 5:17 AM
3:19 PM - 5:49 PM

Minor Periods

7:12 AM - 8:42 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, June 18, 2026

Weather Forecast

Patchy rain nearby
56.3°F
43.9°F
50.9°F
82%
0.09 in
67%
0%
6.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 0.81 μg/m3
PM10: 1 μg/m3
Carbon Monoxide: 109.63 μg/m3
Nitrogen Dioxide: 1.48 μg/m3
Sulphur Dioxide: 0.1 μg/m3
Ozone: 50.13 μg/m3

Astronomical

Sunrise: 5:02 AM
Sun Transit: 1:02 PM
Sunset: 9:03 PM
Daylight: 16 hrs mins
Moonrise: 9:08 AM
Moon Transit: 4:44 PM
Moonset: 12:39 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.4%

Best Times for Fishing or Hunting

Major Periods

3:45 AM - 6:15 AM
4:14 PM - 6:44 PM

Minor Periods

8:38 AM - 10:08 AM
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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