Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

49.3°F

Measurement Time: Thursday, July 30, 2026, 10:18 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

67.5°F
Patchy rain nearby
Patchy rain nearby
67.5°F
67.5°F
73%
WNW 4.9 mph
10.3 mph
67.5°F
58.6°F
0.05 in
84%
6 mi
1012 mbar
0

Five Day Weather Forecast

Partly Cloudy
Fri
H: 69°F
L: 57°F
Sunny
Sat
H: 66°F
L: 54°F
Sunny
Sun
H: 63°F
L: 51°F
Sunny
Mon
H: 64°F
L: 51°F
Sunny
Tue
H: 65°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 9.5 μg/m3
PM10: 10 μg/m3
Carbon Monoxide: 126 μg/m3
Nitrogen Dioxide: 1.2 μg/m3
Sulphur Dioxide: 0.2 μg/m3
Ozone: 59 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:07 PM
Sunset: 8:38 PM
Daylight: 15 hrs 1 mins
Moonrise: 9:35 PM
Moon Transit: 2:24 AM
Moonset: 7:42 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:54 AM - 4:24 AM
2:13 PM - 4:43 PM

Minor Periods

9:05 PM - 10:35 PM
7:12 AM - 8:42 AM

Action Rating: 4 out of 5

Friday, July 31, 2026

Weather Forecast

Partly Cloudy
69.3°F
57°F
62.7°F
87%
0.34 in
82%
0%
8.5 mph
2.7


Air Quality

AQI: 1 - Good
PM2.5: 5.01 μg/m3
PM10: 5.29 μg/m3
Carbon Monoxide: 130.33 μg/m3
Nitrogen Dioxide: 1.78 μg/m3
Sulphur Dioxide: 0.38 μg/m3
Ozone: 66.54 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:07 PM
Sunset: 8:38 PM
Daylight: 15 hrs 1 mins
Moonrise: 9:35 PM
Moon Transit: 2:24 AM
Moonset: 7:42 AM
Moon Phase: Full
Moon Illumination: 92.0%

Best Times for Fishing or Hunting

Major Periods

1:54 AM - 4:24 AM
2:13 PM - 4:43 PM

Minor Periods

9:05 PM - 10:35 PM
7:12 AM - 8:42 AM

Action Rating: 4 out of 5

Saturday, August 1, 2026

Weather Forecast

Sunny
65.9°F
53.9°F
59.4°F
86%
0 in
23%
0%
7.6 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 4.29 μg/m3
PM10: 4.45 μg/m3
Carbon Monoxide: 121.83 μg/m3
Nitrogen Dioxide: 0.78 μg/m3
Sulphur Dioxide: 0.64 μg/m3
Ozone: 57.38 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:07 PM
Sunset: 8:36 PM
Daylight: 14 hrs 58 mins
Moonrise: 9:50 PM
Moon Transit: 3:07 AM
Moonset: 8:53 AM
Moon Phase: Waning Gibbous
Moon Illumination: 84.9%

Best Times for Fishing or Hunting

Major Periods

2:37 AM - 5:07 AM
2:56 PM - 5:26 PM

Minor Periods

9:20 PM - 10:50 PM
8:23 AM - 9:53 AM

Action Rating: 2 out of 5

Sunday, August 2, 2026

Weather Forecast

Sunny
62.5°F
51.4°F
57.1°F
71%
0 in
6%
0%
8.1 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 2.06 μg/m3
PM10: 2.33 μg/m3
Carbon Monoxide: 111.83 μg/m3
Nitrogen Dioxide: 0.83 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 58.71 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 1:07 PM
Sunset: 8:35 PM
Daylight: 14 hrs 55 mins
Moonrise: 10:06 PM
Moon Transit: 3:50 AM
Moonset: 10:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:20 AM - 5:50 AM
5:20 PM - 7:50 PM

Minor Periods

9:36 PM - 11:06 PM
9:35 AM - 11:05 AM

Action Rating: 3 out of 5

Monday, August 3, 2026

Weather Forecast

Sunny
63.9°F
50.8°F
58.3°F
72%
0 in
9%
0%
6.9 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 2.22 μg/m3
PM10: 2.72 μg/m3
Carbon Monoxide: 114.13 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 68.88 μg/m3

Astronomical

Sunrise: 5:41 AM
Sun Transit: 1:07 PM
Sunset: 8:33 PM
Daylight: 14 hrs 52 mins
Moonrise: 10:22 PM
Moon Transit: 12:00 AM
Moonset: 11:18 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

9:52 PM - 11:22 PM
10:48 AM - 12:18 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
64.8°F
55.7°F
60.8°F
78%
0.01 in
36%
0%
11.9 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 2.73 μg/m3
PM10: 2.93 μg/m3
Carbon Monoxide: 164.25 μg/m3
Nitrogen Dioxide: 1.14 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 70.38 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:07 PM
Sunset: 8:32 PM
Daylight: 14 hrs 50 mins
Moonrise: 10:41 PM
Moon Transit: 5:19 AM
Moonset: 12:35 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:49 AM - 7:19 AM
5:11 PM - 7:41 PM

Minor Periods

10:11 PM - 11:41 PM
12:05 AM - 1:35 PM

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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