Water Temperature of Lake Superior Near Duluth, MN

Current Water Temperature

59.9°F

Measurement Time: Tuesday, September 9, 2025, 6:20 PM CDT

Temperature Locations

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Local Points of Interest

McQuade Harbor; Lakewood, MN

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Lake Superior

Station Name: McQuade Harbor Nearshore, MN
Station Type: Buoy
Data Source: National Data Buoy Center

Elevation Above Sea Level: 587 feet / 179 meters

Nearest Address:
Offshore
Duluth, MN 55804
St. Louis County

GPS Coordinates: 46.86, -91.93

Nearby Water Temperatures

Lake Superior, Duluth, MN (1.4 mi)
Lake Superior, Duluth, MN (5.7 mi)
Knife River, Knife River, MN (8.8 mi)
Duluth Harbor, Duluth, MN (9.6 mi)
Lake Superior, Superior, WI (11.5 mi)
Lake Superior, Two Harbors, MN (16.6 mi)
Bois Brule River, Maple, WI (18.8 mi)
St. Louis River, Scanlon, MN (25.5 mi)
Saint Louis River, Hoyt Lakes, MN (43.2 mi)
Baptism River, Illgen City, MN (47.6 mi)
Partrige River, Babbitt, MN (52.5 mi)
Chequamegon Bay, Ashland, WI (52.7 mi)
Namekagon River, Cable, WI (55.5 mi)
Dunka River, Babbitt, MN (55.8 mi)
St. Croix River, Danbury, WI (56.2 mi)

Weather Near Duluth, Minnesota

Current Weather

57.4°F
Mist
Conditions: Mist
Humidity: 100%
Feels Like: 56.3°F
Wind: ENE 6.3 mph
Wind Gusts: 8.6 mph
Pressure: 30.17 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 4 mi
UV Index: 0.8

Five Day Weather Forecast

Overcast
Wed
H: 62°F
L: 53°F
Overcast
Thu
H: 59°F
L: 53°F
Overcast
Fri
H: 62°F
L: 55°F
Partly Cloudy
Sat
H: 65°F
L: 57°F
Patchy rain nearby
Sun
H: 69°F
L: 57°F

Air Quality

AQI: 2 - Moderate
PM2.5: 13.51 μg/m3
PM10: 13.69 μg/m3
Carbon Monoxide: 384.8 μg/m3
Nitrogen Dioxide: 1.67 μg/m3
Sulphur Dioxide: 0.56 μg/m3
Ozone: 96 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:04 PM
Sunset: 7:29 PM
Daylight: 12 hrs 49 mins
Moonrise: 8:35 PM
Moon Transit: 3:08 AM
Moonset: 10:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
2:48 PM - 5:18 PM

Minor Periods

8:05 PM - 9:35 PM
9:53 AM - 11:23 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued September 10 at 1:21AM CDT until September 10 at 10:00AM CDT by NWS Duluth MN

Effective: Wed September 10, 2025, 1:21 AM
Expires: Wed September 10, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bad River Reservation, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including the Apostle Islands National Lakeshore, Voyageurs National Park and Madeline Island. The entire Boundary Waters is also included. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 10 at 1:21AM CDT until September 10 at 10:00AM CDT by NWS Duluth MN

Effective: Wed September 10, 2025, 1:21 AM
Expires: Wed September 10, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bad River Reservation, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including the Apostle Islands National Lakeshore, Voyageurs National Park and Madeline Island. The entire Boundary Waters is also included. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 10 at 1:21AM CDT until September 10 at 10:00AM CDT by NWS Duluth MN

Effective: Wed September 10, 2025, 1:21 AM
Expires: Wed September 10, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bad River Reservation, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including the Apostle Islands National Lakeshore, Voyageurs National Park and Madeline Island. The entire Boundary Waters is also included. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 10 at 1:21AM CDT until September 10 at 10:00AM CDT by NWS Duluth MN

Effective: Wed September 10, 2025, 1:21 AM
Expires: Wed September 10, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bad River Reservation, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including the Apostle Islands National Lakeshore, Voyageurs National Park and Madeline Island. The entire Boundary Waters is also included. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued September 10 at 1:21AM CDT until September 10 at 10:00AM CDT by NWS Duluth MN

Effective: Wed September 10, 2025, 1:21 AM
Expires: Wed September 10, 2025, 10:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, Carlton, St. Louis, Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Red Cliff Band, the Fond du Lac Band, the Grand Portage Reservation, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Bad River Reservation, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Nett Lake, Lake Vermilion and, Deer Creek areas. Other locations including the Apostle Islands National Lakeshore, Voyageurs National Park and Madeline Island. The entire Boundary Waters is also included. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.
Wednesday, September 10, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 58.8°F
Average Humidity: 96%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 1.1

Air Quality

AQI: 2 - Moderate
PM2.5: 17.43 μg/m3
PM10: 17.62 μg/m3
Carbon Monoxide: 443.19 μg/m3
Nitrogen Dioxide: 8.27 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 77.28 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:04 PM
Sunset: 7:29 PM
Daylight: 12 hrs 49 mins
Moonrise: 8:35 PM
Moon Transit: 3:08 AM
Moonset: 10:23 AM
Moon Phase: Waning Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

2:38 AM - 5:08 AM
2:48 PM - 5:18 PM

Minor Periods

8:05 PM - 9:35 PM
9:53 AM - 11:23 AM

Action Rating: 2 out of 5

Thursday, September 11, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 56.1°F
Average Humidity: 96%
Chance of Rain: 0%
Wind: 9.4 mph
UV Index: 1.2

Air Quality

AQI: 1 - Good
PM2.5: 5.51 μg/m3
PM10: 5.62 μg/m3
Carbon Monoxide: 383.39 μg/m3
Nitrogen Dioxide: 2.38 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 89.12 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 1:04 PM
Sunset: 7:27 PM
Daylight: 12 hrs 46 mins
Moonrise: 9:01 PM
Moon Transit: 4:01 AM
Moonset: 11:48 AM
Moon Phase: Waning Gibbous
Moon Illumination: 77.5%

Best Times for Fishing or Hunting

Major Periods

3:31 AM - 6:01 AM
3:43 PM - 6:13 PM

Minor Periods

8:31 PM - 10:01 PM
11:18 AM - 12:48 AM

Action Rating: 2 out of 5

Friday, September 12, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 58.5°F
Average Humidity: 95%
Chance of Rain: 0%
Wind: 14.3 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 8.44 μg/m3
PM10: 8.61 μg/m3
Carbon Monoxide: 394.86 μg/m3
Nitrogen Dioxide: 4.22 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 88.36 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:03 PM
Sunset: 7:25 PM
Daylight: 12 hrs 42 mins
Moonrise: 9:34 PM
Moon Transit: 4:58 AM
Moonset: 1:13 PM
Moon Phase: Waning Gibbous
Moon Illumination: 67.4%

Best Times for Fishing or Hunting

Major Periods

4:28 AM - 6:58 AM
4:41 PM - 7:11 PM

Minor Periods

9:04 PM - 10:34 PM
12:43 AM - 2:13 PM

Action Rating: 4 out of 5

Saturday, September 13, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 60.1°F
Average Humidity: 88%
Chance of Rain: 0%
Wind: 15.7 mph
UV Index: 0.9

Air Quality

AQI: 2 - Moderate
PM2.5: 16.65 μg/m3
PM10: 17.08 μg/m3
Carbon Monoxide: 376.14 μg/m3
Nitrogen Dioxide: 5.04 μg/m3
Sulphur Dioxide: 2.15 μg/m3
Ozone: 100.28 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:03 PM
Sunset: 7:23 PM
Daylight: 12 hrs 39 mins
Moonrise: 10:20 PM
Moon Transit: 5:57 AM
Moonset: 2:34 PM
Moon Phase: Waning Gibbous
Moon Illumination: 56.4%

Best Times for Fishing or Hunting

Major Periods

5:27 AM - 7:57 AM
5:42 PM - 8:12 PM

Minor Periods

9:50 PM - 11:20 PM
2:04 PM - 3:34 PM

Action Rating: 2 out of 5

Sunday, September 14, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 62°F
Average Humidity: 84%
Chance of Rain: 61%
Wind: 13.9 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 16.38 μg/m3
PM10: 17.06 μg/m3
Carbon Monoxide: 393.77 μg/m3
Nitrogen Dioxide: 3.8 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 104.15 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:03 PM
Sunset: 7:21 PM
Daylight: 12 hrs 36 mins
Moonrise: 11:19 PM
Moon Transit: 7:00 AM
Moonset: 3:43 PM
Moon Phase: Last Quarter
Moon Illumination: 45.1%

Best Times for Fishing or Hunting

Major Periods

6:30 AM - 9:00 AM
6:44 PM - 9:14 PM

Minor Periods

12:00 AM - 12:00 AM
3:13 PM - 4:43 PM

Action Rating: 3 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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