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

77.7°F
Mist
Mist
78.9°F
76.5°F
54%
NNW 3.8 mph
8 mph
73.6°F
52.6°F
0 in
100%
1 mi
1019 mbar
0

Five Day Weather Forecast

Sunny
Wed
H: 90°F
L: 61°F
Partly Cloudy
Thu
H: 73°F
L: 59°F
Patchy rain nearby
Fri
H: 71°F
L: 56°F
Sunny
Sat
H: 87°F
L: 58°F
Sunny
Sun
H: 89°F
L: 57°F

Air Quality

AQI: 1 - Good
PM2.5: 6.7 μg/m3
PM10: 6.8 μg/m3
Carbon Monoxide: 120 μg/m3
Nitrogen Dioxide: 4.6 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 1:13 PM
Sunset: 8:58 PM
Daylight: 15 hrs 30 mins
Moonrise: 6:48 AM
Moon Transit: 2:36 PM
Moonset: 10:07 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
2:06 PM - 4:36 PM

Minor Periods

9:37 PM - 11:07 PM
6:18 AM - 7:48 AM

Action Rating: 3 out of 5

Air Quality Alert issued July 14 at 11:32AM CDT by NWS Duluth MN

Effective: Tue July 14, 2026, 11:32 AM
Expires: Thu July 16, 2026, 12:15 PM

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Ashland, Bayfield, Burnett, Douglas, Iron, Price, Sawyer, Washburn. * WHAT...The PM2.5 AQI (24-hour average) is expected to reach the Unhealthy (Red) to Very Unhealthy (Purple) level. Hazardous (Maroon) NowCast AQI (1-hour average) will be possible. * WHERE...Statewide. * WHEN...From noon Tuesday until noon Thursday.

For Very Unhealthy (Purple) AQI: Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities indoors. People with asthma: Follow your asthma action plan and keep quick- relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone else: Limit outdoor physical activity. Go indoors if you have symptoms. For Unhealthy (Red) AQI: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. People with asthma: Follow your asthma action plan and keep quick- relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms. Additional Details: THIS ADVISORY WILL BE RE-EVALUATED THURSDAY MORNING AND WILL LIKELY BE EXTENDED FOR AT LEAST SOME PORTION OF THE STATE BEYOND NOON THURSDAY. Smoke from wildfires in Minnesota and Ontario will enter northern WI between 8 p.m. and midnight Tuesday night. The heaviest smoke impacts, including the potential for Hazardous (Maroon) NowCast AQI, are expected across northwest Wisconsin, especially in communities along Lake Superior. For more information on current air quality, please see: https://airquality.wi.gov


Wednesday, July 15, 2026

Weather Forecast

Sunny
90.3°F
60.5°F
77.5°F
45%
0 in
1%
0%
11.9 mph
4.6


Air Quality

AQI: 1 - Good
PM2.5: 8.68 μg/m3
PM10: 8.97 μg/m3
Carbon Monoxide: 125.67 μg/m3
Nitrogen Dioxide: 4.74 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 83.92 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 1:13 PM
Sunset: 8:58 PM
Daylight: 15 hrs 30 mins
Moonrise: 6:48 AM
Moon Transit: 2:36 PM
Moonset: 10:07 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
2:06 PM - 4:36 PM

Minor Periods

9:37 PM - 11:07 PM
6:18 AM - 7:48 AM

Action Rating: 3 out of 5

Thursday, July 16, 2026

Weather Forecast

Partly Cloudy
73.3°F
58.6°F
65.3°F
73%
0.02 in
38%
0%
15.9 mph
5.7


Air Quality

AQI: 2 - Moderate
PM2.5: 23.57 μg/m3
PM10: 24.48 μg/m3
Carbon Monoxide: 145.33 μg/m3
Nitrogen Dioxide: 5.1 μg/m3
Sulphur Dioxide: 0.96 μg/m3
Ozone: 84.71 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

Patchy rain nearby
70.9°F
56.3°F
63.1°F
95%
0.43 in
91%
0%
10.3 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 8.52 μg/m3
PM10: 8.71 μg/m3
Carbon Monoxide: 143.46 μg/m3
Nitrogen Dioxide: 2.35 μg/m3
Sulphur Dioxide: 0.45 μg/m3
Ozone: 80.04 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

Sunny
87.3°F
58.1°F
71.8°F
73%
0 in
10%
0%
9.2 mph
3.5


Air Quality

AQI: 1 - Good
PM2.5: 5.67 μg/m3
PM10: 5.8 μg/m3
Carbon Monoxide: 152.8 μg/m3
Nitrogen Dioxide: 3.5 μg/m3
Sulphur Dioxide: 0.48 μg/m3
Ozone: 85.38 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
89.4°F
56.6°F
69.7°F
73%
0 in
9%
0%
8.9 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 5.43 μg/m3
PM10: 5.59 μg/m3
Carbon Monoxide: 185.5 μg/m3
Nitrogen Dioxide: 7.39 μg/m3
Sulphur Dioxide: 0.86 μg/m3
Ozone: 75 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

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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