Water Temperature of Lake Superior Near Duluth, MN

Current Water Temperature

49.6°F

Measurement Time: Wednesday, July 22, 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

72.3°F
Overcast
Overcast
76.5°F
77.9°F
78%
SSW 11.4 mph
13.1 mph
74.8°F
64°F
0 in
100%
8 mi
1015 mbar
5.8

Five Day Weather Forecast

Sunny
Fri
H: 86°F
L: 62°F
Sunny
Sat
H: 92°F
L: 64°F
Sunny
Sun
H: 77°F
L: 57°F
Mist
Mon
H: 78°F
L: 60°F
Sunny
Tue
H: 77°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 5.7 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 166 μg/m3
Nitrogen Dioxide: 3.2 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 93 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

Small Craft Advisory issued July 24 at 12:04AM CDT until July 25 at 4:00AM CDT by NWS Duluth MN

Effective: Fri July 24, 2026, 12:04 AM
Expires: Fri July 24, 2026, 12:15 PM

* WHAT...Southwest winds 10 to 15 kt with gusts up to 30 kt and waves 1 to 3 ft expected. * WHERE...Silver Bay Harbor to Two Harbors MN, Two Harbors to Duluth MN and Duluth MN to Port Wing WI. * WHEN...From 3 PM Friday to 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.


Small Craft Advisory issued July 24 at 10:55AM CDT until July 25 at 4:00AM CDT by NWS Duluth MN

Effective: Fri July 24, 2026, 10:55 AM
Expires: Sat July 25, 2026, 4:00 AM

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and waves 1 to 3 ft expected. * WHERE...Silver Bay Harbor to Two Harbors MN, Two Harbors to Duluth MN and Duluth MN to Port Wing WI. * WHEN...From 3 PM this afternoon to 4 AM CDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Friday, July 24, 2026

Weather Forecast

Sunny
85.6°F
61.9°F
73.2°F
64%
0 in
5%
0%
14.8 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 7.35 μg/m3
PM10: 7.63 μg/m3
Carbon Monoxide: 152.13 μg/m3
Nitrogen Dioxide: 3.99 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 92.75 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

Saturday, July 25, 2026

Weather Forecast

Sunny
92.3°F
64.1°F
76°F
64%
0 in
6%
0%
13.4 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 10.33 μg/m3
PM10: 10.72 μg/m3
Carbon Monoxide: 152.42 μg/m3
Nitrogen Dioxide: 5.18 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 108.46 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
77.3°F
57.4°F
67.6°F
80%
0.01 in
36%
0%
11 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 10.39 μg/m3
PM10: 10.72 μg/m3
Carbon Monoxide: 174.38 μg/m3
Nitrogen Dioxide: 5.36 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 92.46 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

Mist
77.7°F
59.5°F
67.5°F
87%
0.09 in
70%
0%
12.8 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 3.8 μg/m3
PM10: 3.9 μg/m3
Carbon Monoxide: 152.2 μg/m3
Nitrogen Dioxide: 3.41 μg/m3
Sulphur Dioxide: 0.58 μg/m3
Ozone: 92.63 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
76.9°F
57.6°F
66.1°F
82%
0 in
17%
0%
9.4 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 3.96 μg/m3
PM10: 4.01 μg/m3
Carbon Monoxide: 232.88 μg/m3
Nitrogen Dioxide: 6.71 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 63.5 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

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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