Water Temperature of Lake Superior Near Duluth, MN

Current Water Temperature

37.9°F

Measurement Time: Monday, June 8, 2026, 9:40 AM CDT

Temperature Locations

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Local Points of Interest

McQuade Harbor; Lakewood, MN

Lake Superior

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

Elevation Above Sea Level: 587 feet

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

73.8°F
Mist
Mist
77.4°F
77.6°F
89%
SW 11.2 mph
15.8 mph
73.9°F
67.7°F
0 in
0%
4 mi
1003 mbar
1

Five Day Weather Forecast

Sunny
Mon
H: 96°F
L: 71°F
Cloudy
Tue
H: 71°F
L: 56°F
Sunny
Wed
H: 74°F
L: 47°F
Sunny
Thu
H: 82°F
L: 53°F
Sunny
Fri
H: 78°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 5 μg/m3
PM10: 5.2 μg/m3
Carbon Monoxide: 131 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 101 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:14 PM
Sunset: 8:54 PM
Daylight: 15 hrs 20 mins
Moonrise: 1:12 PM
Moon Transit: 6:30 PM
Moonset: 12:20 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
6:00 PM - 8:30 PM

Minor Periods

12:42 AM - 2:12 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Heat Advisory issued July 20 at 12:13AM CDT until July 20 at 7:00PM CDT by NWS Duluth MN

Effective: Mon July 20, 2026, 12:13 AM
Expires: Mon July 20, 2026, 12:15 PM

* WHAT...Heat index values up to 95 expected. * WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Carlton and South St. Louis, and Southern Lake Counties. In Wisconsin, Price, Ashland, Bayfield, Burnett, Douglas, Iron, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Lac Courte Oreilles Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the northwestern area of the Lac du Flambeau Band, the Bad River Reservation, the Fond du Lac Band and the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas. Other locations including the Apostle Islands National Lakeshore and Madeline Island. * WHEN...From 11 AM this morning to 7 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.


Special Weather Statement issued July 20 at 6:12AM CDT by NWS Duluth MN

Effective: Mon July 20, 2026, 6:12 AM
Expires: Mon July 20, 2026, 1:00 PM

Dry conditions and very strong west winds will lead to near critical fire weather conditions today. West winds of 10 to 20 mph with gusts of 30 to 35 mph are forecast for the entire day Minimum relative humidity values of 40 to 50 percent are also expected, possibly drier in northern Saint Louis county where overnight showers and storms only brough a few hundreths of an inch of rain. Higher rainfall amounts did fall in northern Cook and Lake Counties on the order of a quarter to half inch, but skies will partially clear out quickly today leading to drying condiitons. Together, these conditions could lead to the rapid spread of fires. Check burning restrictions and fire danger before burning. For more information on burning restrictions for Minnesota, see www.dnr.state.mn.us/forestry/fire/firerating_restrictions.html.
Monday, July 20, 2026

Weather Forecast

Sunny
96.4°F
71.4°F
80.2°F
61%
0.01 in
17%
0%
17.7 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 6.19 μg/m3
PM10: 6.35 μg/m3
Carbon Monoxide: 136.5 μg/m3
Nitrogen Dioxide: 2.75 μg/m3
Sulphur Dioxide: 0.71 μg/m3
Ozone: 102.33 μg/m3

Astronomical

Sunrise: 5:34 AM
Sun Transit: 1:14 PM
Sunset: 8:54 PM
Daylight: 15 hrs 20 mins
Moonrise: 1:12 PM
Moon Transit: 6:30 PM
Moonset: 12:20 AM
Moon Phase: Waxing Crescent
Moon Illumination: 32.7%

Best Times for Fishing or Hunting

Major Periods

5:22 AM - 7:52 AM
6:00 PM - 8:30 PM

Minor Periods

12:42 AM - 2:12 PM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

Tuesday, July 21, 2026

Weather Forecast

Cloudy
71.1°F
55.7°F
65.3°F
66%
0 in
12%
0%
16.3 mph
6.3


Air Quality

AQI: 1 - Good
PM2.5: 4.42 μg/m3
PM10: 4.49 μg/m3
Carbon Monoxide: 170.96 μg/m3
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 82.58 μg/m3

Astronomical

Sunrise: 5:35 AM
Sun Transit: 1:14 PM
Sunset: 8:53 PM
Daylight: 15 hrs 18 mins
Moonrise: 2:22 PM
Moon Transit: 7:14 PM
Moonset: 12:38 AM
Moon Phase: First Quarter
Moon Illumination: 43.7%

Best Times for Fishing or Hunting

Major Periods

6:06 AM - 8:36 AM
6:44 PM - 9:14 PM

Minor Periods

1:52 PM - 3:22 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Wednesday, July 22, 2026

Weather Forecast

Sunny
74.4°F
47.1°F
62.1°F
59%
0 in
4%
0%
5.6 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 9.01 μg/m3
PM10: 9.35 μg/m3
Carbon Monoxide: 191.13 μg/m3
Nitrogen Dioxide: 4.71 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 84.17 μg/m3

Astronomical

Sunrise: 5:36 AM
Sun Transit: 1:14 PM
Sunset: 8:52 PM
Daylight: 15 hrs 16 mins
Moonrise: 3:31 PM
Moon Transit: 8:00 PM
Moonset: 12:58 AM
Moon Phase: First Quarter
Moon Illumination: 55.0%

Best Times for Fishing or Hunting

Major Periods

6:51 AM - 9:21 AM
7:30 PM - 10:00 PM

Minor Periods

3:01 PM - 4:31 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Thursday, July 23, 2026

Weather Forecast

Sunny
82°F
53.3°F
66.6°F
61%
0.01 in
17%
0%
5.8 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 9.24 μg/m3
PM10: 9.47 μg/m3
Carbon Monoxide: 186.34 μg/m3
Nitrogen Dioxide: 5.27 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 88.29 μg/m3

Astronomical

Sunrise: 5:37 AM
Sun Transit: 1:14 PM
Sunset: 8:51 PM
Daylight: 15 hrs 14 mins
Moonrise: 4:40 PM
Moon Transit: 8:48 PM
Moonset: 12:22 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

7:38 AM - 10:08 AM
8:18 PM - 10:48 PM

Minor Periods

4:10 PM - 5:40 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
78.4°F
56.8°F
63.1°F
77%
0.15 in
66%
0%
13.4 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 9.54 μg/m3
PM10: 9.64 μg/m3
Carbon Monoxide: 254.5 μg/m3
Nitrogen Dioxide: 8.45 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 64.38 μg/m3

Astronomical

Sunrise: 5:38 AM
Sun Transit: 1:14 PM
Sunset: 8:50 PM
Daylight: 15 hrs 12 mins
Moonrise: 5:44 PM
Moon Transit: 9:38 PM
Moonset: 12:52 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

8:26 AM - 10:56 AM
9:08 PM - 11:38 PM

Minor Periods

5:14 PM - 6:44 PM
12:22 AM - 1:52 AM

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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