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

48°F
Sunny
Sunny
42.9°F
67.1°F
100%
ENE 11.9 mph
24.9 mph
67.1°F
64.2°F
0 in
0%
5 mi
1009 mbar
1.4

Five Day Weather Forecast

Sunny
Mon
H: 68°F
L: 61°F
Patchy rain nearby
Tue
H: 71°F
L: 60°F
Sunny
Wed
H: 65°F
L: 54°F
Patchy rain nearby
Thu
H: 67°F
L: 53°F
Patchy rain nearby
Fri
H: 63°F
L: 53°F

Air Quality

PM2.5: 4.1 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 126 μg/m3
Nitrogen Dioxide: 0.9 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 100 μg/m3

Astronomical

Sunrise: 5:06 AM
Sun Transit: 1:04 PM
Sunset: 9:04 PM
Daylight: 15 hrs 58 mins
Moonrise: 9:29 PM
Moon Transit: 12:27 AM
Moonset: 4:12 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:20 AM - 2:50 PM

Minor Periods

8:59 PM - 10:29 PM
3:42 AM - 5:12 AM

Action Rating: 5 out of 5

Small Craft Advisory issued June 29 at 6:33AM CDT until June 29 at 10:00PM CDT by NWS Duluth MN

Effective: Mon June 29, 2026, 6:33 AM
Expires: Mon June 29, 2026, 6:45 PM

* WHAT...Northeast winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 4 ft expected. * WHERE...Grand Portage to Grand Marais MN and Grand Marais to Taconite Harbor MN. * WHEN...From 10 AM this morning to 10 PM CDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Monday, June 29, 2026

Weather Forecast

Sunny
67.8°F
61°F
63.9°F
85%
0.76 in
80%
0%
14.3 mph
2.6


Air Quality

AQI: 1 - Good
PM2.5: 3.08 μg/m3
PM10: 3.2 μg/m3
Carbon Monoxide: 121.25 μg/m3
Nitrogen Dioxide: 0.89 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 94.17 μg/m3

Astronomical

Sunrise: 5:06 AM
Sun Transit: 1:04 PM
Sunset: 9:04 PM
Daylight: 15 hrs 58 mins
Moonrise: 9:29 PM
Moon Transit: 12:27 AM
Moonset: 4:12 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:20 AM - 2:50 PM

Minor Periods

8:59 PM - 10:29 PM
3:42 AM - 5:12 AM

Action Rating: 5 out of 5

Tuesday, June 30, 2026

Weather Forecast

Patchy rain nearby
71.3°F
60.1°F
66.8°F
81%
0.11 in
69%
0%
9.6 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 3.3 μg/m3
PM10: 3.8 μg/m3
Carbon Monoxide: 117.79 μg/m3
Nitrogen Dioxide: 1.26 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 91.63 μg/m3

Astronomical

Sunrise: 5:06 AM
Sun Transit: 1:05 PM
Sunset: 9:03 PM
Daylight: 15 hrs 57 mins
Moonrise: 10:05 PM
Moon Transit: 1:19 AM
Moonset: 5:13 AM
Moon Phase: Full
Moon Illumination: 98.6%

Best Times for Fishing or Hunting

Major Periods

12:49 AM - 3:19 AM
1:11 PM - 3:41 PM

Minor Periods

9:35 PM - 11:05 PM
4:43 AM - 6:13 AM

Action Rating: 4 out of 5

Wednesday, July 1, 2026

Weather Forecast

Sunny
64.6°F
54.4°F
59.5°F
81%
0.07 in
60%
0%
7.8 mph
5.1


Air Quality

AQI: 1 - Good
PM2.5: 5.26 μg/m3
PM10: 6.8 μg/m3
Carbon Monoxide: 115.25 μg/m3
Nitrogen Dioxide: 1.25 μg/m3
Sulphur Dioxide: 0.25 μg/m3
Ozone: 80.63 μg/m3

Astronomical

Sunrise: 5:07 AM
Sun Transit: 1:05 PM
Sunset: 9:03 PM
Daylight: 15 hrs 56 mins
Moonrise: 10:32 PM
Moon Transit: 2:08 AM
Moonset: 6:20 AM
Moon Phase: Full
Moon Illumination: 94.7%

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
2:00 PM - 4:30 PM

Minor Periods

10:02 PM - 11:32 PM
5:50 AM - 7:20 AM

Action Rating: 3 out of 5

Thursday, July 2, 2026

Weather Forecast

Patchy rain nearby
66.7°F
53.1°F
60.1°F
89%
0.01 in
46%
0%
7.8 mph
6.5


Air Quality

AQI: 1 - Good
PM2.5: 0.82 μg/m3
PM10: 0.92 μg/m3
Carbon Monoxide: 166.75 μg/m3
Nitrogen Dioxide: 1.6 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 88.8 μg/m3

Astronomical

Sunrise: 5:08 AM
Sun Transit: 1:05 PM
Sunset: 9:03 PM
Daylight: 15 hrs 55 mins
Moonrise: 10:54 PM
Moon Transit: 2:56 AM
Moonset: 7:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.5%

Best Times for Fishing or Hunting

Major Periods

2:26 AM - 4:56 AM
2:46 PM - 5:16 PM

Minor Periods

10:24 PM - 11:54 PM
6:59 AM - 8:29 AM

Action Rating: 3 out of 5

Friday, July 3, 2026

Weather Forecast

Patchy rain nearby
62.7°F
52.6°F
58.3°F
95%
0.82 in
92%
0%
11 mph
4.6


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:08 AM
Sun Transit: 1:05 PM
Sunset: 9:03 PM
Daylight: 15 hrs 54 mins
Moonrise: 11:12 PM
Moon Transit: 3:41 AM
Moonset: 8:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 80.3%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

12:00 AM - 12:00 AM
8:11 AM - 9:41 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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