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

75.4°F
Sunny
Sunny
76.8°F
79.5°F
54%
WSW 9.8 mph
11.3 mph
79.3°F
53.7°F
0 in
0%
9 mi
1020 mbar
5.6

Five Day Weather Forecast

Sunny
Thu
H: 86°F
L: 59°F
Sunny
Fri
H: 82°F
L: 54°F
Sunny
Sat
H: 86°F
L: 62°F
Sunny
Sun
H: 74°F
L: 58°F
Patchy rain nearby
Mon
H: 74°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 9.3 μg/m3
PM10: 9.7 μg/m3
Carbon Monoxide: 164 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 94 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

Small Craft Advisory issued July 23 at 1:51AM CDT until July 23 at 4:00PM CDT by NWS Duluth MN

Effective: Thu July 23, 2026, 1:51 AM
Expires: Thu July 23, 2026, 2:00 PM

* WHAT...Southwest winds 10 to 20 kt with gusts to 25 kt and waves 1 to 2 ft expected. * WHERE...Port Wing to Sand Island WI, Sand Island to Bayfield WI and Outer Apostle Islands Beyond 5 NM from Mainland. * WHEN...From 10 AM this morning to 4 PM CDT this afternoon. * IMPACTS...Conditions will be hazardous to small craft.

Anyone operating a smaller vessel should avoid navigating in hazardous conditions.
Thursday, July 23, 2026

Weather Forecast

Sunny
86.4°F
59.2°F
73°F
48%
0 in
1%
0%
10.5 mph
7.7


Air Quality

AQI: 1 - Good
PM2.5: 9.85 μg/m3
PM10: 10.16 μg/m3
Carbon Monoxide: 173.71 μg/m3
Nitrogen Dioxide: 4.44 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 83.25 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
82.2°F
54.4°F
70.6°F
66%
0.02 in
36%
0%
14.8 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 6.75 μg/m3
PM10: 6.95 μg/m3
Carbon Monoxide: 153.75 μg/m3
Nitrogen Dioxide: 3.8 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 97.75 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
86.4°F
62.4°F
73.1°F
78%
0.18 in
69%
0%
13.4 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 8.3 μg/m3
PM10: 8.56 μg/m3
Carbon Monoxide: 144.58 μg/m3
Nitrogen Dioxide: 4.99 μg/m3
Sulphur Dioxide: 0.85 μg/m3
Ozone: 105.67 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
73.7°F
58.1°F
65.1°F
80%
0 in
17%
0%
10.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 10.13 μg/m3
PM10: 10.38 μg/m3
Carbon Monoxide: 150.88 μg/m3
Nitrogen Dioxide: 6.16 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 97.83 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

Patchy rain nearby
73.7°F
57°F
64.7°F
79%
0.03 in
48%
0%
8.9 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 3.71 μg/m3
PM10: 3.81 μg/m3
Carbon Monoxide: 192.88 μg/m3
Nitrogen Dioxide: 4.66 μg/m3
Sulphur Dioxide: 1.28 μg/m3
Ozone: 85.5 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

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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