Water Temperature of Grand Marais Harbor in Grand Marais, MN

Current Water Temperature

51.1°F 10.6°C
Cold Thermal Gear Required
51.1°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: Sunday, November 15, 2026, 2:18 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)

Marine Weather for Grand Marais Harbor in Grand Marais, MN

Marine Weather

Coastal & Marine Conditions
Open-Meteo Marine
0.5ft 0.2 m
Calm / Flat Smooth waters with minimal wave motion.
Wave Period 2.3s
Wave Direction 162° SSE
Swell Waves
0.3 ft
2.5s • 147° SSE
Wind Waves / Chop
0.4 ft
1.8s • 226° SW
High and low tide forecasts are not applicable for freshwater lake stations.

5-Day Marine Wave Forecast

Today
Nov 15
1.2 ft
3.8s • S
Mon
Nov 16
2.9 ft
4.2s • SSW
Tue
Nov 17
2.1 ft
3.7s • SSW
Wed
Nov 18
2.2 ft
4s • S
Thu
Nov 19
2.9 ft
4.2s • SSW

Weather for Grand Marais, Minnesota

Current Weather

39°F
Sunny
Conditions: Sunny
Humidity: 82%
Feels Like: 33.3°F
Wind: WSW 5.1 mph
Wind Gusts: 10.3 mph
Pressure: 30.32 in
Precipitation: 0 in
Cloud Cover: 7%
Visibility: 13.2 mi
UV Index: 1.9

Five-Day Weather Forecast

Overcast
Sun
H: 41°F
L: 29°F
Overcast
Mon
H: 45°F
L: 37°F
Overcast
Tue
H: 47°F
L: 41°F
Overcast
Wed
H: 49°F
L: 44°F
Moderate Drizzle
Thu
H: 52°F
L: 44°F

Air Quality

EPA Index 1 • Good

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

PM2.5
1.8 μg/m³
Good
PM10
1.9 μg/m³
Good
Ozone (O3)
65 μg/m³
Photochemical
NO2
4.5 μg/m³
Nitrogen Dioxide
SO2
1 μg/m³
Sulfur Dioxide
CO
139 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 17m daylight
Sunrise 7:07 AM
Solar Noon 11:46 AM
Sunset 4:25 PM
Moon
Waxing Crescent • 31%
Moonrise 12:32 PM
Transit 5:00 PM
Moonset 9:35 PM

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
4:30 PM - 7:00 PM

Minor Periods

12:02 PM - 1:32 PM
9:05 PM - 10:35 PM
Action Rating:
Good Action 3/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 35.1°F
Average Humidity: 80%
Chance of Rain: 0%
Wind: 8.5 mph
UV Index: 2.2

Air Quality

EPA Index 1 • Good
PM2.5
1.8 μg/m³
Good
PM10
1.9 μg/m³
Good
Ozone (O3)
63.3 μg/m³
Photochemical
NO2
3.2 μg/m³
Nitrogen Dioxide
SO2
0.7 μg/m³
Sulfur Dioxide
CO
126.1 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 17m daylight
Sunrise 7:07 AM
Solar Noon 11:46 AM
Sunset 4:25 PM
Moon
Waxing Crescent • 31%
Moonrise 12:32 PM
Transit 5:00 PM
Moonset 9:35 PM

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
4:30 PM - 7:00 PM

Minor Periods

12:02 PM - 1:32 PM
9:05 PM - 10:35 PM
Action Rating:
Good Action 3/5
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 41.2°F
Average Humidity: 84%
Chance of Rain: 2%
Wind: 16.2 mph
UV Index: 2.1

Air Quality

EPA Index 1 • Good
PM2.5
4 μg/m³
Good
PM10
4.1 μg/m³
Good
Ozone (O3)
51.7 μg/m³
Photochemical
NO2
5.1 μg/m³
Nitrogen Dioxide
SO2
0.7 μg/m³
Sulfur Dioxide
CO
144.9 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 15m daylight
Sunrise 7:09 AM
Solar Noon 11:46 AM
Sunset 4:23 PM
Moon
First Quarter • 42%
Moonrise 12:53 PM
Transit 5:43 PM
Moonset 10:45 PM

Best Times for Fishing or Hunting

Major Periods

4:51 AM - 7:21 AM
5:13 PM - 7:43 PM

Minor Periods

12:23 PM - 1:53 PM
10:15 PM - 11:45 PM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 44.4°F
Average Humidity: 88%
Chance of Rain: 1%
Wind: 12.7 mph
UV Index: 1.8

Air Quality

EPA Index 1 • Good
PM2.5
5.1 μg/m³
Good
PM10
5.1 μg/m³
Good
Ozone (O3)
54.3 μg/m³
Photochemical
NO2
4.6 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
150.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 12m daylight
Sunrise 7:10 AM
Solar Noon 11:46 AM
Sunset 4:22 PM
Moon
First Quarter • 54%
Moonrise 1:10 PM
Transit 6:26 PM
Moonset 11:54 PM

Best Times for Fishing or Hunting

Major Periods

5:35 AM - 8:05 AM
5:56 PM - 8:26 PM

Minor Periods

12:40 PM - 2:10 PM
11:24 PM - 12:54 AM
Action Rating:
Fair Action 2/5
Wednesday, November 18, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 46.4°F
Average Humidity: 82%
Chance of Rain: 7%
Wind: 10.1 mph
UV Index: 1.9

Air Quality

EPA Index 1 • Good
PM2.5
4 μg/m³
Good
PM10
4.1 μg/m³
Good
Ozone (O3)
63.4 μg/m³
Photochemical
NO2
2.2 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
134.6 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 10m daylight
Sunrise 7:11 AM
Solar Noon 11:46 AM
Sunset 4:21 PM
Moon
First Quarter • 65%
Moonrise 1:26 PM
Transit 7:09 PM
Moonset 1:51 AM

Best Times for Fishing or Hunting

Major Periods

6:17 AM - 8:47 AM
6:39 PM - 9:09 PM

Minor Periods

1:21 AM - 2:51 AM
12:56 PM - 2:26 PM
Action Rating:
Fair Action 2/5
Thursday, November 19, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 48.7°F
Average Humidity: 85%
Chance of Rain: 25%
Wind: 15.3 mph
UV Index: 1.1

Air Quality

EPA Index 1 • Good
PM2.5
3.6 μg/m³
Good
PM10
3.7 μg/m³
Good
Ozone (O3)
51.6 μg/m³
Photochemical
NO2
2.2 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
141.2 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 7m daylight
Sunrise 7:13 AM
Solar Noon 11:46 AM
Sunset 4:20 PM
Moon
Waxing Gibbous • 75%
Moonrise 1:42 PM
Transit 7:52 PM
Moonset 1:05 AM

Best Times for Fishing or Hunting

Major Periods

7:00 AM - 9:30 AM
7:22 PM - 9:52 PM

Minor Periods

12:35 AM - 2:05 AM
1:12 PM - 2:42 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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