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

View Nearby Locations View All Minnesota Locations View Locations Near Me

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

51.1°F

Conditions: Clear

Feels Like: 49.4°F

Heat Index: 61.5°F

Humidity: 96%

Wind: NW 5.1 mph

Wind Gusts: 10.8 mph

Wind Chill: 61.5°F

Dew Point: 41.6°F

Precipitation: 0 in

Cloud Cover: 0%

Visibility: 6 mi

Air Pressure: 1013 mbar

UV Index: 0

Five Day Weather Forecast

Fri
H: 63°F
L: 57°F

Sat
H: 65°F
L: 54°F

Sun
H: 71°F
L: 57°F

Mon
H: 76°F
L: 61°F

Tue
H: 75°F
L: 60°F

Air Quality

AQI: 1 - Good

PM2.5: 6.3 μg/m3

PM10: 6.9 μg/m3

Carbon Monoxide: 122 μg/m3
Nitrogen Dioxide: 0.9 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 1:06 PM
Sunset: 8:59 PM
Daylight: 15 hrs 46 mins

Moonrise: 1:04 AM
Moon Transit: 9:11 AM
Moonset: 5:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:41 AM - 11:11 AM
9:09 PM - 11:39 PM

Minor Periods

5:06 PM - 6:36 PM
12:34 AM - 2:04 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued July 9 at 11:39PM CDT until July 10 at 10:00AM CDT by NWS Duluth MN

Effective: Thu July 9, 2026, 11:39 PM
Expires: Fri July 10, 2026, 10:00 AM

* WHAT...Dense fog will reduce visibility to less than 1 NM. * WHERE...Grand Portage to Grand Marais MN, Grand Marais to Taconite Harbor MN and Taconite Harbor to Silver Bay Harbor MN. * WHEN...Until 10 AM CDT Friday. * IMPACTS...Low visibility will make navigation difficult. * ADDITIONAL DETAILS...Coverage may be intermittent.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.

Dense Fog Advisory issued July 9 at 10:45PM EDT until July 10 at 11:00AM EDT by NWS Marquette MI

Effective: Thu July 9, 2026, 9:45 PM
Expires: Fri July 10, 2026, 9:45 AM

* WHAT...Dense fog will reduce visibility to less than one nautical mile. * WHERE...Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM, Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park and Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border. * WHEN...Until 11 AM EDT /10 AM CDT/ Friday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.

Friday, July 10, 2026

Weather Forecast

Conditions: Partly Cloudy

High Temperature: 63.1°F

Low Temperature: 57°F

Average Temperature: 60.2°F

Average Humidity: 67%

Precipitation: 0 in

Chance of Rain: 7%

Chance of Snow: 0%

Maximum Wind: 6.7 mph

UV Index: 7.1

Air Quality

AQI: 1 - Good

PM2.5: 6.07 μg/m3

PM10: 6.58 μg/m3

Carbon Monoxide: 125.54 μg/m3
Nitrogen Dioxide: 1.49 μg/m3
Sulphur Dioxide: 0.55 μg/m3
Ozone: 86.13 μg/m3

Astronomical

Sunrise: 5:14 AM
Sun Transit: 1:06 PM
Sunset: 8:59 PM
Daylight: 15 hrs 46 mins

Moonrise: 1:04 AM
Moon Transit: 9:11 AM
Moonset: 5:36 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.7%

Best Times for Fishing or Hunting

Major Periods

8:41 AM - 11:11 AM
9:09 PM - 11:39 PM

Minor Periods

5:06 PM - 6:36 PM
12:34 AM - 2:04 AM

Action Rating: 3 out of 5

Saturday, July 11, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 64.6°F

Low Temperature: 53.6°F

Average Temperature: 59.7°F

Average Humidity: 77%

Precipitation: 0 in

Chance of Rain: 14%

Chance of Snow: 0%

Maximum Wind: 7.8 mph

UV Index: 8.2

Air Quality

AQI: 1 - Good

PM2.5: 7.31 μg/m3

PM10: 8.2 μg/m3

Carbon Monoxide: 125.38 μg/m3
Nitrogen Dioxide: 1.18 μg/m3
Sulphur Dioxide: 0.54 μg/m3
Ozone: 104.21 μg/m3

Astronomical

Sunrise: 5:15 AM
Sun Transit: 1:06 PM
Sunset: 8:59 PM
Daylight: 15 hrs 44 mins

Moonrise: 1:42 AM
Moon Transit: 10:14 AM
Moonset: 6:57 PM
Moon Phase: Waning Crescent
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:44 AM - 12:14 AM

Minor Periods

6:27 PM - 7:57 PM
1:12 AM - 2:42 AM

Action Rating: 2 out of 5

Sunday, July 12, 2026

Weather Forecast

Conditions: Patchy rain nearby

High Temperature: 70.6°F

Low Temperature: 57.3°F

Average Temperature: 64.3°F

Average Humidity: 88%

Precipitation: 0.06 in

Chance of Rain: 67%

Chance of Snow: 0%

Maximum Wind: 8.1 mph

UV Index: 7.7

Air Quality

AQI: 1 - Good

PM2.5: 7.22 μg/m3

PM10: 7.58 μg/m3

Carbon Monoxide: 123.38 μg/m3
Nitrogen Dioxide: 1.37 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 105.63 μg/m3

Astronomical

Sunrise: 5:16 AM
Sun Transit: 1:07 PM
Sunset: 8:58 PM
Daylight: 15 hrs 42 mins

Moonrise: 2:36 AM
Moon Transit: 11:20 AM
Moonset: 8:05 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:50 AM - 1:20 PM

Minor Periods

7:35 PM - 9:05 PM
2:06 AM - 3:36 AM

Action Rating: 3 out of 5

Monday, July 13, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 75.9°F

Low Temperature: 61°F

Average Temperature: 68.2°F

Average Humidity: 77%

Precipitation: 0 in

Chance of Rain: 11%

Chance of Snow: 0%

Maximum Wind: 18.3 mph

UV Index: 8.8

Air Quality

AQI: 1 - Good

PM2.5: 5.52 μg/m3

PM10: 5.68 μg/m3

Carbon Monoxide: 130.85 μg/m3
Nitrogen Dioxide: 1.19 μg/m3
Sulphur Dioxide: 0.42 μg/m3
Ozone: 105 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 1:07 PM
Sunset: 8:57 PM
Daylight: 15 hrs 41 mins

Moonrise: 3:46 AM
Moon Transit: 12:27 AM
Moonset: 8:58 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:57 AM - 2:27 PM

Minor Periods

8:28 PM - 9:58 PM
3:16 AM - 4:46 AM

Action Rating: 4 out of 5

Tuesday, July 14, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 74.7°F

Low Temperature: 60.3°F

Average Temperature: 65.7°F

Average Humidity: 61%

Precipitation: 0 in

Chance of Rain: 7%

Chance of Snow: 0%

Maximum Wind: 13 mph

UV Index: 6

Air Quality

AQI: 1 - Good

PM2.5: 3.5 μg/m3

PM10: 3.64 μg/m3

Carbon Monoxide: 163.13 μg/m3
Nitrogen Dioxide: 1.94 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 98.63 μg/m3

Astronomical

Sunrise: 5:17 AM
Sun Transit: 1:07 PM
Sunset: 8:56 PM
Daylight: 15 hrs 39 mins

Moonrise: 5:09 AM
Moon Transit: 1:31 PM
Moonset: 9:35 PM
Moon Phase: New
Moon Illumination: 1.9%

Best Times for Fishing or Hunting

Major Periods

12:27 AM - 2:57 AM
1:01 PM - 3:31 PM

Minor Periods

9:05 PM - 10:35 PM
4:39 AM - 6:09 AM

Action Rating: 4 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.

Webcams Near Grand Marais, MN

Webcams provided by windy.com — add a webcam

Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

Temperature Locations

Local Points of Interest

Nearby Water Temperatures

Weather for Grand Marais, Minnesota

Current Weather

Five Day Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Dense Fog Advisory issued July 9 at 11:39PM CDT until July 10 at 10:00AM CDT by NWS Duluth MN

Dense Fog Advisory issued July 9 at 10:45PM EDT until July 10 at 11:00AM EDT by NWS Marquette MI

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Webcams Near Grand Marais, MN

Sponsored Content