Water Temperature of Lake Superior in Duluth, MN

Current Water Temperature

63.0°F

Measurement Time: Saturday, September 16, 2023, 12:00 AM CDT

Temperature Locations

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Local Points of Interest

Lakewood, MN

Lake Superior

Station Name: Lakewood Water Plant
Data Source: USGS

Elevation Above Sea Level: 614 feet

Nearest Address:
8126 Congdon Blvd
Duluth, MN 55804
St. Louis County

GPS Coordinates: 46.8619, -91.9600

Nearby Water Temperatures

Lake Superior, Duluth, MN (1.4 mi)
Lake Superior, Duluth, MN (7 mi)
Duluth Harbor, Duluth, MN (8.6 mi)
Knife River, Knife River, MN (9.9 mi)
Lake Superior, Superior, WI (10.9 mi)
Lake Superior, Two Harbors, MN (17.6 mi)
Bois Brule River, Maple, WI (20.1 mi)
St. Louis River, Scanlon, MN (24.3 mi)
Saint Louis River, Hoyt Lakes, MN (42.9 mi)
Baptism River, Illgen City, MN (48.6 mi)
Partrige River, Babbitt, MN (52.4 mi)
Chequamegon Bay, Ashland, WI (54.1 mi)
Dunka River, Babbitt, MN (55.8 mi)
St. Croix River, Danbury, WI (56 mi)
Namekagon River, Cable, WI (56.3 mi)

Weather for Duluth, Minnesota

Current Weather

25°F
Partly cloudy
Partly cloudy
15.8°F
29.8°F
80%
SSW 8.7 mph
10.5 mph
19.8°F
16.1°F
0 in
50%
9 mi
1027 mbar
1.4

Five Day Weather Forecast

Sunny
Sat
H: 51°F
L: 15°F
Overcast
Sun
H: 35°F
L: 26°F
Overcast
Mon
H: 33°F
L: 26°F
Moderate snow
Tue
H: 32°F
L: 26°F
Light freezing rain
Wed
H: 27°F
L: 22°F

Air Quality

AQI: 1 - Good
PM2.5: 4.75 μg/m3
PM10: 5.35 μg/m3
Carbon Monoxide: 194.85 μg/m3
Nitrogen Dioxide: 3.25 μg/m3
Sulphur Dioxide: 1.85 μg/m3
Ozone: 90 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:12 PM
Sunset: 7:32 PM
Daylight: 12 hrs 37 mins
Moonrise: 2:43 PM
Moon Transit: 10:17 PM
Moonset: 5:11 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 77.5%

Best Times for Fishing or Hunting

Major Periods

9:05 AM - 11:35 AM
12:00 AM - 12:00 AM

Minor Periods

2:13 PM - 3:43 PM
4:41 AM - 6:11 AM

Action Rating: 2 out of 5

Red Flag Warning issued March 27 at 8:46PM CDT until March 28 at 7:00PM CDT by NWS Duluth MN

Effective: Fri March 27, 2026, 8:46 PM
Expires: Sat March 28, 2026, 9:00 AM

* AFFECTED AREA...In Minnesota, North Cass, South Itasca, South Cass, Crow Wing, Northern Aitkin, South Aitkin, Carlton and South St. Louis and Pine. * WINDS...Southwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Any fires that ignite could spread rapidly and become difficult to control. 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 March 28 at 1:46AM CDT until March 28 at 7:00PM CDT by NWS Duluth MN

Effective: Sat March 28, 2026, 1:46 AM
Expires: Sat March 28, 2026, 2:00 PM

* AFFECTED AREA...In Minnesota, North Cass, South Itasca, South Cass, Crow Wing, Northern Aitkin, South Aitkin, Carlton and South St. Louis and Pine. * WINDS...Southwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Any fires that ignite could spread rapidly and become difficult to control. 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.
Saturday, March 28, 2026

Weather Forecast

Sunny
50.5°F
15.4°F
30.2°F
54%
0 in
0%
0%
10.1 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 5.6 μg/m3
PM10: 6.46 μg/m3
Carbon Monoxide: 226.25 μg/m3
Nitrogen Dioxide: 3.77 μg/m3
Sulphur Dioxide: 2.11 μg/m3
Ozone: 87.12 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 1:12 PM
Sunset: 7:32 PM
Daylight: 12 hrs 37 mins
Moonrise: 2:43 PM
Moon Transit: 10:17 PM
Moonset: 5:11 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 77.5%

Best Times for Fishing or Hunting

Major Periods

9:05 AM - 11:35 AM
12:00 AM - 12:00 AM

Minor Periods

2:13 PM - 3:43 PM
4:41 AM - 6:11 AM

Action Rating: 2 out of 5

Sunday, March 29, 2026

Weather Forecast

Overcast
35.4°F
25.9°F
30.1°F
90%
0 in
0%
0%
13 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 6.01 μg/m3
PM10: 6.33 μg/m3
Carbon Monoxide: 213.69 μg/m3
Nitrogen Dioxide: 5.53 μg/m3
Sulphur Dioxide: 2.17 μg/m3
Ozone: 76.8 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 1:12 PM
Sunset: 7:33 PM
Daylight: 12 hrs 40 mins
Moonrise: 4:00 PM
Moon Transit: 11:04 PM
Moonset: 5:34 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 86.2%

Best Times for Fishing or Hunting

Major Periods

9:54 AM - 12:24 AM
12:00 AM - 12:00 AM

Minor Periods

3:30 PM - 5:00 PM
5:04 AM - 6:34 AM

Action Rating: 3 out of 5

Monday, March 30, 2026

Weather Forecast

Overcast
33.3°F
26.2°F
29.6°F
97%
0 in
0%
0%
20.8 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 5.57 μg/m3
PM10: 6.18 μg/m3
Carbon Monoxide: 203.21 μg/m3
Nitrogen Dioxide: 2.51 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 86.12 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 1:12 PM
Sunset: 7:34 PM
Daylight: 12 hrs 43 mins
Moonrise: 5:14 PM
Moon Transit: 11:48 PM
Moonset: 5:52 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 93.0%

Best Times for Fishing or Hunting

Major Periods

10:40 AM - 1:10 PM
12:00 AM - 12:00 AM

Minor Periods

4:44 PM - 6:14 PM
5:22 AM - 6:52 AM

Action Rating: 3 out of 5

Tuesday, March 31, 2026

Weather Forecast

Moderate snow
31.5°F
26.4°F
29.6°F
92%
0.2 in
65%
41%
20.1 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 6.55 μg/m3
PM10: 7.06 μg/m3
Carbon Monoxide: 179.62 μg/m3
Nitrogen Dioxide: 2.5 μg/m3
Sulphur Dioxide: 1.49 μg/m3
Ozone: 96.6 μg/m3

Astronomical

Sunrise: 6:49 AM
Sun Transit: 1:11 PM
Sunset: 7:36 PM
Daylight: 12 hrs 47 mins
Moonrise: 6:26 PM
Moon Transit: 12:00 AM
Moonset: 6:09 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:24 AM - 1:54 PM

Minor Periods

5:56 PM - 7:26 PM
5:39 AM - 7:09 AM

Action Rating: 4 out of 5

Wednesday, April 1, 2026

Weather Forecast

Light freezing rain
26.8°F
21.5°F
24.5°F
84%
0.04 in
84%
38%
13.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.22 μg/m3
PM10: 1.3 μg/m3
Carbon Monoxide: 167.13 μg/m3
Nitrogen Dioxide: 1.57 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 89.08 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:11 PM
Sunset: 7:37 PM
Daylight: 12 hrs 50 mins
Moonrise: 7:35 PM
Moon Transit: 12:31 AM
Moonset: 6:24 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:01 AM - 2:31 AM
12:06 AM - 2:36 PM

Minor Periods

7:05 PM - 8:35 PM
5:54 AM - 7:24 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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