Water Temperature of Lake Superior Near Duluth, MN

Current Water Temperature

46.8°F

Measurement Time: Saturday, July 25, 2026, 1:40 PM 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

84.2°F
Cloudy
Cloudy
86.6°F
93.4°F
58%
NW 3.1 mph
4.5 mph
88.3°F
68.8°F
0 in
75%
10 mi
988 mbar
2.5

Five Day Weather Forecast

Sunny
Sat
H: 88°F
L: 69°F
Sunny
Sun
H: 82°F
L: 64°F
Sunny
Mon
H: 83°F
L: 58°F
Sunny
Tue
H: 75°F
L: 57°F
Sunny
Wed
H: 75°F
L: 55°F

Air Quality

AQI: 1 - Good
PM2.5: 13.2 μg/m3
PM10: 13.8 μg/m3
Carbon Monoxide: 149 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 139 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:14 PM
Sunset: 8:49 PM
Daylight: 15 hrs 10 mins
Moonrise: 6:41 PM
Moon Transit: 10:29 PM
Moonset: 1:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:17 AM - 11:47 AM
12:00 AM - 12:00 AM

Minor Periods

6:11 PM - 7:41 PM
12:59 AM - 2:29 AM

Action Rating: 2 out of 5

Heat Advisory issued July 25 at 2:18PM CDT until July 26 at 9:00PM CDT by NWS Duluth MN

Effective: Sat July 25, 2026, 2:18 PM
Expires: Sun July 26, 2026, 2:30 AM

* WHAT...Heat index values up to 95 expected. * WHERE...North St. Louis, Cook and Lake Counties. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area and the Grand Portage Reservation. Other locations including Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...From 11 AM to 9 PM CDT Sunday. * 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.


Heat Advisory issued July 25 at 11:52AM CDT until July 26 at 9:00PM CDT by NWS Duluth MN

Effective: Sat July 25, 2026, 11:52 AM
Expires: Sun July 26, 2026, 12:00 AM

* WHAT...Heat index values up to 95 expected. * WHERE...North St. Louis, Cook and Lake Counties. This includes the Tribal Lands of the Bois Forte Band, Nett Lake area and the Grand Portage Reservation. Other locations including Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...From 11 AM to 9 PM CDT Sunday. * 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.
Saturday, July 25, 2026

Weather Forecast

Sunny
88.3°F
68.7°F
76.9°F
70%
0.19 in
65%
0%
12.3 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 9.75 μg/m3
PM10: 10.06 μg/m3
Carbon Monoxide: 160.88 μg/m3
Nitrogen Dioxide: 4.83 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 98.63 μg/m3

Astronomical

Sunrise: 5:39 AM
Sun Transit: 1:14 PM
Sunset: 8:49 PM
Daylight: 15 hrs 10 mins
Moonrise: 6:41 PM
Moon Transit: 10:29 PM
Moonset: 1:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

9:17 AM - 11:47 AM
12:00 AM - 12:00 AM

Minor Periods

6:11 PM - 7:41 PM
12:59 AM - 2:29 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
81.7°F
64°F
72.6°F
71%
0.02 in
36%
0%
7.2 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 12.81 μg/m3
PM10: 13.3 μg/m3
Carbon Monoxide: 158.63 μg/m3
Nitrogen Dioxide: 6.15 μg/m3
Sulphur Dioxide: 1.12 μg/m3
Ozone: 99.96 μg/m3

Astronomical

Sunrise: 5:40 AM
Sun Transit: 1:14 PM
Sunset: 8:48 PM
Daylight: 15 hrs 7 mins
Moonrise: 7:29 PM
Moon Transit: 11:20 PM
Moonset: 2:18 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

10:09 AM - 12:39 AM
12:00 AM - 12:00 AM

Minor Periods

6:59 PM - 8:29 PM
1:48 AM - 3:18 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
82.5°F
57.8°F
69.2°F
81%
0.01 in
25%
0%
8.1 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 5.48 μg/m3
PM10: 5.64 μg/m3
Carbon Monoxide: 139.58 μg/m3
Nitrogen Dioxide: 5.33 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 68.08 μg/m3

Astronomical

Sunrise: 5:42 AM
Sun Transit: 1:14 PM
Sunset: 8:46 PM
Daylight: 15 hrs 5 mins
Moonrise: 8:08 PM
Moon Transit: 12:00 AM
Moonset: 3:15 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:00 AM - 1:30 PM

Minor Periods

7:38 PM - 9:08 PM
2:45 AM - 4:15 AM

Action Rating: 3 out of 5

Tuesday, July 28, 2026

Weather Forecast

Sunny
75.4°F
56.8°F
64.8°F
80%
0 in
14%
0%
12.1 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 5.33 μg/m3
PM10: 5.43 μg/m3
Carbon Monoxide: 161.61 μg/m3
Nitrogen Dioxide: 6.97 μg/m3
Sulphur Dioxide: 0.92 μg/m3
Ozone: 62.08 μg/m3

Astronomical

Sunrise: 5:43 AM
Sun Transit: 1:14 PM
Sunset: 8:45 PM
Daylight: 15 hrs 2 mins
Moonrise: 8:39 PM
Moon Transit: 12:11 AM
Moonset: 4:20 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:50 AM - 2:20 PM

Minor Periods

8:09 PM - 9:39 PM
3:50 AM - 5:20 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
75.3°F
54.8°F
64.7°F
68%
0 in
5%
0%
11 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 2.48 μg/m3
PM10: 2.51 μg/m3
Carbon Monoxide: 162 μg/m3
Nitrogen Dioxide: 3.3 μg/m3
Sulphur Dioxide: 0.31 μg/m3
Ozone: 55 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:14 PM
Sunset: 8:44 PM
Daylight: 15 hrs mins
Moonrise: 9:03 PM
Moon Transit: 1:00 AM
Moonset: 5:29 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
12:37 AM - 3:07 PM

Minor Periods

8:33 PM - 10:03 PM
4:59 AM - 6:29 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.

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