Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

51.3°F 10.7°C
Cold Thermal Gear Required
51.3°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Tuesday, November 10, 2026, 2:00 AM CST

Temperature Locations

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Local Points of Interest

Lake Superior; Grand Marais Campground and Marina; Grand Marais Municipal Arena

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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

47°F
Clear
Conditions: Clear
Humidity: 67%
Feels Like: 41.7°F
Wind: WNW 11.9 mph
Wind Gusts: 30.4 mph
Pressure: 29.86 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0

Weather Forecast

Overcast
Tue
H: 51°F
L: 39°F
Sunny
Wed
H: 45°F
L: 33°F
Sunny
Thu
H: 37°F
L: 30°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
1.5 μg/m³
Good
PM10
1.9 μg/m³
Good
Ozone (O3)
58 μg/m³
Photochemical
NO2
1.5 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
126 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 31m daylight
Sunrise 7:00 AM
Solar Noon 11:45 AM
Sunset 4:31 PM
Moon
New • 0%
Moonrise 8:51 AM
Transit 12:50 PM
Moonset 4:46 PM

Best Times for Fishing or Hunting

Major Periods

12:20 PM - 2:50 PM
11:55 PM - 2:25 AM

Minor Periods

8:21 AM - 9:51 AM
4:16 PM - 5:46 PM
Action Rating:
Very Good 4/5

Small Craft Advisory issued November 9 at 9:56PM CST until November 10 at 4:00AM CST by NWS Duluth MN

Effective: Mon November 9, 2026, 9:56 PM
Expires: Tue November 10, 2026, 4:00 AM

* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt and waves 1 to 3 ft. * WHERE...Grand Portage to Grand Marais MN, Grand Marais to Taconite Harbor MN, Taconite Harbor to Silver Bay Harbor MN and Silver Bay Harbor to Two Harbors MN. * WHEN...Until 4 AM CST Tuesday. * IMPACTS...Conditions will be hazardous to small craft.


Small Craft Advisory issued November 10 at 1:10AM CST until November 10 at 4:00AM CST by NWS Duluth MN

Effective: Tue November 10, 2026, 1:10 AM
Expires: Tue November 10, 2026, 4:00 AM

* WHAT...Northwest winds 10 to 20 kt with gusts up to 30 kt and waves 1 to 2 ft. * WHERE...Grand Portage to Grand Marais MN, Grand Marais to Taconite Harbor MN and Taconite Harbor to Silver Bay Harbor MN. * WHEN...Until 4 AM CST early this morning. * IMPACTS...Conditions will be hazardous to small craft.
Tuesday, November 10, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.4°F
Average Humidity: 71%
Chance of Rain: 12%
Wind: 16.8 mph
UV Index: 1.3

Astronomical

Sun
9h 31m daylight
Sunrise 7:00 AM
Solar Noon 11:45 AM
Sunset 4:31 PM
Moon
New • 0%
Moonrise 8:51 AM
Transit 12:50 PM
Moonset 4:46 PM

Best Times for Fishing or Hunting

Major Periods

12:20 PM - 2:50 PM
11:55 PM - 2:25 AM

Minor Periods

8:21 AM - 9:51 AM
4:16 PM - 5:46 PM
Action Rating:
Very Good 4/5
Wednesday, November 11, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 39.7°F
Average Humidity: 70%
Chance of Rain: 17%
Wind: 13.2 mph
UV Index: 1.1

Astronomical

Sun
9h 28m daylight
Sunrise 7:01 AM
Solar Noon 11:45 AM
Sunset 4:29 PM
Moon
New • 2%
Moonrise 9:54 AM
Transit 1:42 PM
Moonset 5:28 PM

Best Times for Fishing or Hunting

Major Periods

12:46 AM - 3:16 AM
1:12 PM - 3:42 PM

Minor Periods

9:24 AM - 10:54 AM
4:58 PM - 6:28 PM
Action Rating:
Very Good 4/5
Thursday, November 12, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 32.9°F
Average Humidity: 62%
Chance of Rain: 8%
Wind: 13.4 mph
UV Index: 1.2

Astronomical

Sun
9h 25m daylight
Sunrise 7:03 AM
Solar Noon 11:45 AM
Sunset 4:28 PM
Moon
Waxing Crescent • 6%
Moonrise 10:48 AM
Transit 2:33 PM
Moonset 6:21 PM

Best Times for Fishing or Hunting

Major Periods

1:37 AM - 4:07 AM
2:03 PM - 4:33 PM

Minor Periods

10:18 AM - 11:48 AM
5:51 PM - 7:21 PM
Action Rating:
Good Action 3/5
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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