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

66.4°F
Fog
Fog
66.4°F
66.6°F
94%
ENE 3.6 mph
7.5 mph
66.6°F
60.1°F
0 in
75%
0 mi
1020 mbar
0.1

Five Day Weather Forecast

Sunny
Thu
H: 86°F
L: 60°F
Sunny
Fri
H: 74°F
L: 56°F
Partly Cloudy
Sat
H: 80°F
L: 60°F
Sunny
Sun
H: 83°F
L: 59°F
Sunny
Mon
H: 73°F
L: 65°F

Air Quality

AQI: 1 - Good
PM2.5: 34.7 μg/m3
PM10: 36.7 μg/m3
Carbon Monoxide: 238 μg/m3
Nitrogen Dioxide: 10 μg/m3
Sulphur Dioxide: 2.3 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 1:13 PM
Sunset: 8:58 PM
Daylight: 15 hrs 28 mins
Moonrise: 8:12 AM
Moon Transit: 3:29 PM
Moonset: 10:29 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

2:17 AM - 4:47 AM
2:59 PM - 5:29 PM

Minor Periods

9:59 PM - 11:29 PM
7:42 AM - 9:12 AM

Action Rating: 3 out of 5

Dense Smoke Advisory issued July 15 at 3:41PM EDT until July 16 at 11:00AM EDT by NWS Marquette MI

Effective: Wed July 15, 2026, 2:41 PM
Expires: Thu July 16, 2026, 2:45 AM

* WHAT...Dense smoke will reduce visibility to less than one nautical mile at times. * WHERE...Portions of Central, Eastern and Western Lake Superior. * WHEN...Until 11 AM EDT /10 AM CDT/ Thursday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.


Dense Smoke Advisory issued July 15 at 9:12PM EDT until July 16 at 11:00AM EDT by NWS Marquette MI

Effective: Wed July 15, 2026, 8:12 PM
Expires: Thu July 16, 2026, 8:15 AM

* WHAT...Dense smoke will reduce visibility to less than one nautical mile. * WHERE...Portions of Central, Eastern and Western Lake Superior. * WHEN...Until 11 AM EDT /10 AM CDT/ Thursday. * IMPACTS...Low visibility will make navigation difficult.

If you must navigate, proceed with caution. Use proper fog signals. Make sure all running lights are on. Remember to use your radar and compass.
Thursday, July 16, 2026

Weather Forecast

Sunny
86.4°F
59.5°F
71.4°F
66%
0 in
5%
0%
13.6 mph
4.2


Air Quality

AQI: 2 - Moderate
PM2.5: 32.05 μg/m3
PM10: 33.17 μg/m3
Carbon Monoxide: 216.25 μg/m3
Nitrogen Dioxide: 5.75 μg/m3
Sulphur Dioxide: 1.63 μg/m3
Ozone: 104.17 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 1:13 PM
Sunset: 8:58 PM
Daylight: 15 hrs 28 mins
Moonrise: 8:12 AM
Moon Transit: 3:29 PM
Moonset: 10:29 PM
Moon Phase: New
Moon Illumination: 2.4%

Best Times for Fishing or Hunting

Major Periods

2:17 AM - 4:47 AM
2:59 PM - 5:29 PM

Minor Periods

9:59 PM - 11:29 PM
7:42 AM - 9:12 AM

Action Rating: 3 out of 5

Friday, July 17, 2026

Weather Forecast

Sunny
73.9°F
56.2°F
64.1°F
87%
0.09 in
68%
0%
12.3 mph
5.5


Air Quality

AQI: 1 - Good
PM2.5: 13.82 μg/m3
PM10: 14.02 μg/m3
Carbon Monoxide: 175.38 μg/m3
Nitrogen Dioxide: 5.07 μg/m3
Sulphur Dioxide: 0.64 μg/m3
Ozone: 80.33 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:13 PM
Sunset: 8:57 PM
Daylight: 15 hrs 26 mins
Moonrise: 9:32 AM
Moon Transit: 4:17 PM
Moonset: 10:47 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.0%

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
3:47 PM - 6:17 PM

Minor Periods

10:17 PM - 11:47 PM
9:02 AM - 10:32 AM

Action Rating: 3 out of 5

Saturday, July 18, 2026

Weather Forecast

Partly Cloudy
80.1°F
60.2°F
69.7°F
79%
0 in
22%
0%
8.1 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 8.68 μg/m3
PM10: 8.78 μg/m3
Carbon Monoxide: 135.21 μg/m3
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 0.64 μg/m3
Ozone: 92.21 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 1:14 PM
Sunset: 8:56 PM
Daylight: 15 hrs 24 mins
Moonrise: 10:48 AM
Moon Transit: 5:03 PM
Moonset: 11:04 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.9%

Best Times for Fishing or Hunting

Major Periods

3:54 AM - 6:24 AM
4:33 PM - 7:03 PM

Minor Periods

12:00 AM - 12:00 AM
10:18 AM - 11:48 AM

Action Rating: 2 out of 5

Sunday, July 19, 2026

Weather Forecast

Sunny
83.2°F
58.6°F
71.2°F
74%
0.01 in
20%
0%
13.9 mph
0


Air Quality

AQI: 2 - Moderate
PM2.5: 18.93 μg/m3
PM10: 19.15 μg/m3
Carbon Monoxide: 234.35 μg/m3
Nitrogen Dioxide: 6.22 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 110.33 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 1:14 PM
Sunset: 8:55 PM
Daylight: 15 hrs 23 mins
Moonrise: 12:01 AM
Moon Transit: 5:46 PM
Moonset: 12:04 AM
Moon Phase: Waxing Crescent
Moon Illumination: 22.6%

Best Times for Fishing or Hunting

Major Periods

4:39 AM - 7:09 AM
5:16 PM - 7:46 PM

Minor Periods

11:31 AM - 1:01 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, July 20, 2026

Weather Forecast

Sunny
73.2°F
64.9°F
68.9°F
65%
0.08 in
57%
0%
18.3 mph
6


Air Quality

AQI: 1 - Good
PM2.5: 8.85 μg/m3
PM10: 8.98 μg/m3
Carbon Monoxide: 258.75 μg/m3
Nitrogen Dioxide: 5.19 μg/m3
Sulphur Dioxide: 0.75 μg/m3
Ozone: 92.5 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

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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