Water Temperature of Lake Superior Near Duluth, MN

Current Water Temperature

36.7°F

Measurement Time: Thursday, May 14, 2026, 5:40 PM CDT

Temperature Locations

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Lake Superior

Station Name: Western Lake Superior
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: 46.814, -91.829

Nearby Water Temperatures

Lake Superior, Duluth, MN (5.7 mi)
Lake Superior, Duluth, MN (7 mi)
Knife River, Knife River, MN (9.3 mi)
Duluth Harbor, Duluth, MN (12.7 mi)
Lake Superior, Superior, WI (12.8 mi)
Bois Brule River, Maple, WI (13.1 mi)
Lake Superior, Two Harbors, MN (16.1 mi)
St. Louis River, Scanlon, MN (28.9 mi)
Baptism River, Illgen City, MN (46.7 mi)
Saint Louis River, Hoyt Lakes, MN (47.1 mi)
Chequamegon Bay, Ashland, WI (47.2 mi)
Namekagon River, Cable, WI (50.4 mi)
St. Croix River, Danbury, WI (54.7 mi)
Partrige River, Babbitt, MN (55.8 mi)
Bad River, Ashland, WI (58.3 mi)

Weather Near Duluth, Minnesota

Current Weather

39.9°F
Partly cloudy
Partly cloudy
32.6°F
50.8°F
100%
S 12.3 mph
25.8 mph
48.9°F
42.9°F
0 in
75%
9 mi
1004 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 86°F
L: 50°F
Sunny
Sat
H: 71°F
L: 49°F
Moderate rain
Sun
H: 50°F
L: 41°F
Heavy rain
Mon
H: 60°F
L: 49°F
Patchy rain nearby
Tue
H: 56°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 3.65 μg/m3
PM10: 3.85 μg/m3
Carbon Monoxide: 155.85 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 77 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 1:03 PM
Sunset: 8:36 PM
Daylight: 15 hrs 4 mins
Moonrise: 4:22 AM
Moon Transit: 11:53 AM
Moonset: 7:44 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:23 AM - 1:53 PM

Minor Periods

7:14 PM - 8:44 PM
3:52 AM - 5:22 AM

Action Rating: 5 out of 5

Red Flag Warning issued May 14 at 11:25AM CDT until May 15 at 9:00PM CDT by NWS Duluth MN

Effective: Thu May 14, 2026, 11:25 AM
Expires: Thu May 14, 2026, 11:30 PM

The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 9 PM CDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Wisconsin, Douglas, Bayfield, Ashland, Iron, Burnett, Washburn and Sawyer. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued May 14 at 5:05PM CDT until May 15 at 9:00PM CDT by NWS Duluth MN

Effective: Thu May 14, 2026, 5:05 PM
Expires: Fri May 15, 2026, 5:15 AM

...CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON AND FRIDAY... * AFFECTED AREA...In Wisconsin, Douglas, Bayfield, Ashland, Iron, Burnett, Washburn and Sawyer. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued May 15 at 1:28AM CDT until May 15 at 9:00PM CDT by NWS Duluth MN

Effective: Fri May 15, 2026, 1:28 AM
Expires: Fri May 15, 2026, 4:00 PM

* AFFECTED AREA...In Wisconsin, Douglas, Bayfield, Ashland, Iron, Burnett, Washburn and Sawyer. * WINDS...Southwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued May 14 at 11:25AM CDT until May 14 at 5:00PM CDT by NWS Duluth MN

Effective: Thu May 14, 2026, 11:25 AM
Expires: Thu May 14, 2026, 11:30 PM

The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 5 PM CDT this afternoon. A Red Flag Warning has also been issued from noon to 9 PM CDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Minnesota, North St. Louis, Central St. Louis, Carlton and South St. Louis and Pine. * WINDS...Southwest 15 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 19 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.


Red Flag Warning issued May 14 at 11:25AM CDT until May 15 at 9:00PM CDT by NWS Duluth MN

Effective: Thu May 14, 2026, 11:25 AM
Expires: Thu May 14, 2026, 11:30 PM

The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 5 PM CDT this afternoon. A Red Flag Warning has also been issued from noon to 9 PM CDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Minnesota, North St. Louis, Central St. Louis, Carlton and South St. Louis and Pine. * WINDS...Southwest 15 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 19 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended.

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
Friday, May 15, 2026

Weather Forecast

Patchy rain nearby
85.5°F
49.5°F
64.3°F
55%
0.02 in
74%
0%
17 mph
7.6


Air Quality

AQI: 1 - Good
PM2.5: 4.07 μg/m3
PM10: 4.78 μg/m3
Carbon Monoxide: 148.81 μg/m3
Nitrogen Dioxide: 3.35 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 94.12 μg/m3

Astronomical

Sunrise: 5:32 AM
Sun Transit: 1:03 PM
Sunset: 8:36 PM
Daylight: 15 hrs 4 mins
Moonrise: 4:22 AM
Moon Transit: 11:53 AM
Moonset: 7:44 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:23 AM - 1:53 PM

Minor Periods

7:14 PM - 8:44 PM
3:52 AM - 5:22 AM

Action Rating: 5 out of 5

Saturday, May 16, 2026

Weather Forecast

Sunny
71.2°F
49.1°F
59.3°F
52%
0 in
0%
0%
10.3 mph
6.8


Air Quality

AQI: 1 - Good
PM2.5: 3.83 μg/m3
PM10: 4.31 μg/m3
Carbon Monoxide: 156.09 μg/m3
Nitrogen Dioxide: 4.17 μg/m3
Sulphur Dioxide: 1.82 μg/m3
Ozone: 90.52 μg/m3

Astronomical

Sunrise: 5:31 AM
Sun Transit: 1:03 PM
Sunset: 8:37 PM
Daylight: 15 hrs 6 mins
Moonrise: 4:51 AM
Moon Transit: 12:53 AM
Moonset: 9:12 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:23 AM - 2:53 PM

Minor Periods

8:42 PM - 10:12 PM
4:21 AM - 5:51 AM

Action Rating: 5 out of 5

Sunday, May 17, 2026

Weather Forecast

Moderate rain
49.8°F
41.1°F
45.8°F
80%
0.31 in
75%
0%
19.7 mph
1.9


Air Quality

AQI: 1 - Good
PM2.5: 1.78 μg/m3
PM10: 1.84 μg/m3
Carbon Monoxide: 141.69 μg/m3
Nitrogen Dioxide: 2.91 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 64.96 μg/m3

Astronomical

Sunrise: 5:30 AM
Sun Transit: 1:03 PM
Sunset: 8:38 PM
Daylight: 15 hrs 9 mins
Moonrise: 5:31 AM
Moon Transit: 1:57 PM
Moonset: 10:35 PM
Moon Phase: New
Moon Illumination: 0.2%

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
1:27 PM - 3:57 PM

Minor Periods

10:05 PM - 11:35 PM
5:01 AM - 6:31 AM

Action Rating: 4 out of 5

Monday, May 18, 2026

Weather Forecast

Heavy rain
60°F
48.7°F
54.1°F
92%
1.89 in
89%
0%
16.1 mph
4.9


Air Quality

AQI: 1 - Good
PM2.5: 1.57 μg/m3
PM10: 1.61 μg/m3
Carbon Monoxide: 150.58 μg/m3
Nitrogen Dioxide: 2.19 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 65.32 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 1:03 PM
Sunset: 8:40 PM
Daylight: 15 hrs 11 mins
Moonrise: 6:25 AM
Moon Transit: 3:04 PM
Moonset: 11:44 PM
Moon Phase: New
Moon Illumination: 2.6%

Best Times for Fishing or Hunting

Major Periods

1:45 AM - 4:15 AM
2:34 PM - 5:04 PM

Minor Periods

12:00 AM - 12:00 AM
5:55 AM - 7:25 AM

Action Rating: 4 out of 5

Tuesday, May 19, 2026

Weather Forecast

Patchy rain nearby
55.8°F
40.5°F
45.2°F
82%
0.11 in
85%
0%
17.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.44 μg/m3
PM10: 1.5 μg/m3
Carbon Monoxide: 136.65 μg/m3
Nitrogen Dioxide: 2.27 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 63.23 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 1:03 PM
Sunset: 8:41 PM
Daylight: 15 hrs 13 mins
Moonrise: 7:34 AM
Moon Transit: 4:10 PM
Moonset: 12:44 AM
Moon Phase: Waxing Crescent
Moon Illumination: 7.4%

Best Times for Fishing or Hunting

Major Periods

2:52 AM - 5:22 AM
3:40 PM - 6:10 PM

Minor Periods

7:04 AM - 8:34 AM
12:00 AM - 12:00 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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