Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

39.9°F

Measurement Time: Sunday, April 26, 2026, 6:18 PM 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

35.1°F
Clear
Clear
28.1°F
39.5°F
96%
E 8.7 mph
14.4 mph
34.6°F
37.7°F
0 in
0%
6 mi
1019 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Sun
H: 42°F
L: 38°F
Heavy rain
Mon
H: 43°F
L: 39°F
Patchy rain nearby
Tue
H: 49°F
L: 35°F
Partly Cloudy
Wed
H: 47°F
L: 30°F
Patchy rain nearby
Thu
H: 42°F
L: 31°F

Air Quality

AQI: 1 - Good
PM2.5: 5.18 μg/m3
PM10: 6.48 μg/m3
Carbon Monoxide: 152.68 μg/m3
Nitrogen Dioxide: 1.38 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:00 PM
Sunset: 8:07 PM
Daylight: 14 hrs 15 mins
Moonrise: 2:56 PM
Moon Transit: 9:40 PM
Moonset: 3:54 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
9:10 PM - 11:40 PM

Minor Periods

2:26 PM - 3:56 PM
3:24 AM - 4:54 AM

Action Rating: 2 out of 5

Flood Watch issued April 26 at 1:15PM CDT until April 28 at 7:00AM CDT by NWS Duluth MN

Effective: Sun April 26, 2026, 1:15 PM
Expires: Mon April 27, 2026, 3:00 PM

* WHAT...Flooding caused by rain and snowmelt is possible. * WHERE...In Minnesota, Cook and Lake Counties. This includes the Tribal Lands of the Grand Portage Reservation.This also includes the Boundary Waters eastern and central area. * WHEN...From Monday morning through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Around 1 to 2 inches of rain is expected to fall. Eastern Cook County also has several inches of lingering snowpack. While rainfall rates are not expected to be heavy, prolonged moderate rainfall on top of saturated soils and should lead to runoff. Area rivers and streams are already running at elevated levels and could rise to minor flooding levels with runoff due to the additional rainfall. - Flood safety information can be found at www.weather.gov/safety/flood.

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Sunday, April 26, 2026

Weather Forecast

Patchy rain nearby
42.1°F
38.3°F
40.3°F
89%
0.13 in
84%
0%
10.7 mph
2.4


Air Quality

AQI: 1 - Good
PM2.5: 7.73 μg/m3
PM10: 11.59 μg/m3
Carbon Monoxide: 158.84 μg/m3
Nitrogen Dioxide: 2.17 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 78.08 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 1:00 PM
Sunset: 8:07 PM
Daylight: 14 hrs 15 mins
Moonrise: 2:56 PM
Moon Transit: 9:40 PM
Moonset: 3:54 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
9:10 PM - 11:40 PM

Minor Periods

2:26 PM - 3:56 PM
3:24 AM - 4:54 AM

Action Rating: 2 out of 5

Monday, April 27, 2026

Weather Forecast

Heavy rain
43.4°F
39.4°F
41.5°F
94%
0.83 in
91%
0%
18.3 mph
1.7


Air Quality

AQI: 1 - Good
PM2.5: 6.54 μg/m3
PM10: 8.02 μg/m3
Carbon Monoxide: 166.84 μg/m3
Nitrogen Dioxide: 2.19 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 87.68 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:00 PM
Sunset: 8:09 PM
Daylight: 14 hrs 18 mins
Moonrise: 4:08 PM
Moon Transit: 10:23 PM
Moonset: 4:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

9:30 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

3:38 PM - 5:08 PM
3:40 AM - 5:10 AM

Action Rating: 2 out of 5

Tuesday, April 28, 2026

Weather Forecast

Patchy rain nearby
49.1°F
34.7°F
41.9°F
75%
0.07 in
88%
0%
25.5 mph
5.5


Air Quality

AQI: 1 - Good
PM2.5: 1.51 μg/m3
PM10: 1.65 μg/m3
Carbon Monoxide: 160.32 μg/m3
Nitrogen Dioxide: 1.45 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 96.52 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:58 AM
Sunset: 8:10 PM
Daylight: 14 hrs 21 mins
Moonrise: 5:18 PM
Moon Transit: 11:04 PM
Moonset: 4:25 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

10:11 AM - 12:41 AM
12:00 AM - 12:00 AM

Minor Periods

4:48 PM - 6:18 PM
3:55 AM - 5:25 AM

Action Rating: 3 out of 5

Wednesday, April 29, 2026

Weather Forecast

Partly Cloudy
46.7°F
30.3°F
38.9°F
63%
0 in
0%
0%
8.5 mph
4.6


Air Quality

AQI: 1 - Good
PM2.5: 1.91 μg/m3
PM10: 2.27 μg/m3
Carbon Monoxide: 146.46 μg/m3
Nitrogen Dioxide: 1.53 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 75.64 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:58 AM
Sunset: 8:11 PM
Daylight: 14 hrs 25 mins
Moonrise: 6:28 PM
Moon Transit: 11:47 PM
Moonset: 4:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%

Best Times for Fishing or Hunting

Major Periods

10:53 AM - 1:23 PM
12:00 AM - 12:00 AM

Minor Periods

5:58 PM - 7:28 PM
4:09 AM - 5:39 AM

Action Rating: 3 out of 5

Thursday, April 30, 2026

Weather Forecast

Patchy rain nearby
42.4°F
30.7°F
35.7°F
71%
0.01 in
86%
0%
6.7 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.02 μg/m3
PM10: 1.05 μg/m3
Carbon Monoxide: 145.73 μg/m3
Nitrogen Dioxide: 1.35 μg/m3
Sulphur Dioxide: 0.72 μg/m3
Ozone: 70.31 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:58 AM
Sunset: 8:13 PM
Daylight: 14 hrs 28 mins
Moonrise: 7:38 PM
Moon Transit: 12:00 AM
Moonset: 4:55 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:35 AM - 2:05 PM

Minor Periods

7:08 PM - 8:38 PM
4:25 AM - 5:55 AM

Action Rating: 5 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

Sponsored Content