Water Temperature of Duluth Harbor in Duluth, MN

Current Water Temperature

61.3°F

Measurement Time: Wednesday, September 23, 2026, 6:18 PM CDT

Temperature Locations

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Local Points of Interest

Lake Superior; Park Point; Coast Guard Basin; Duluth Canal

Duluth Harbor

Station Name: 9099064 - Duluth, MN
Station Type: Fixed
Data Source: National Data Buoy Center

Elevation Above Sea Level: 597 feet

Nearest Address:
870 Minnesota Ave
Duluth, MN 55802
St. Louis County

GPS Coordinates: 46.776, -92.092

Nearby Water Temperatures

Lake Superior, Superior, WI (4 mi)
Lake Superior, Duluth, MN (8.6 mi)
Lake Superior, Duluth, MN (9.6 mi)
Lake Superior, Duluth, MN (12.7 mi)
St. Louis River, Scanlon, MN (16.3 mi)
Knife River, Knife River, MN (18.4 mi)
Bois Brule River, Maple, WI (23.7 mi)
Lake Superior, Two Harbors, MN (26.2 mi)
Saint Louis River, Hoyt Lakes, MN (48.8 mi)
St. Croix River, Danbury, WI (48.9 mi)
Namekagon River, Cable, WI (55.3 mi)
Baptism River, Illgen City, MN (57.2 mi)
Chequamegon Bay, Ashland, WI (58.8 mi)
Partrige River, Babbitt, MN (58.8 mi)
Dunka River, Babbitt, MN (62.5 mi)

Weather for Duluth, Minnesota

Current Weather

54°F
Partly Cloudy
Partly Cloudy
94%
NE 10 mph
52°F

Weather Forecast

Mostly Cloudy
Tonight
52°F - Mostly Cloudy
Cloudy then Chance Rain Showers
Thursday
62°F - Cloudy then Chance Rain Showers
Chance Rain Showers then Mostly Cloudy
Thursday Night
56°F - Chance Rain Showers then Mostly Cloudy
Partly Sunny
Friday
66°F - Partly Sunny
Mostly Cloudy
Friday Night
57°F - Mostly Cloudy
Mostly Cloudy then Chance Rain Showers
Saturday
65°F - Mostly Cloudy then Chance Rain Showers
Chance Rain Showers
Saturday Night
56°F - Chance Rain Showers
Chance Rain Showers then Mostly Cloudy
Sunday
65°F - Chance Rain Showers then Mostly Cloudy
Mostly Cloudy
Sunday Night
56°F - Mostly Cloudy
Partly Sunny then Chance Showers And Thunderstorms
Monday
65°F - Partly Sunny then Chance Showers And Thunderstorms
Chance Showers And Thunderstorms
Monday Night
57°F - Chance Showers And Thunderstorms
Showers And Thunderstorms Likely
Tuesday
61°F - Showers And Thunderstorms Likely
Rain Showers Likely
Tuesday Night
52°F - Rain Showers Likely
Chance Rain Showers
Wednesday
58°F - Chance Rain Showers

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:00 PM
Sunset: 7:04 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:52 PM
Moon Transit: 11:05 PM
Moonset: 3:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

9:56 AM - 12:26 AM
12:00 AM - 12:00 AM

Minor Periods

5:22 PM - 6:52 PM
2:50 AM - 4:20 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 1:00 PM
Sunset: 7:04 PM
Daylight: 12 hrs 7 mins
Moonrise: 5:52 PM
Moon Transit: 11:05 PM
Moonset: 3:20 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

9:56 AM - 12:26 AM
12:00 AM - 12:00 AM

Minor Periods

5:22 PM - 6:52 PM
2:50 AM - 4:20 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 1:00 PM
Sunset: 7:02 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:09 PM
Moon Transit: 11:49 PM
Moonset: 4:32 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:39 PM - 7:09 PM
4:02 AM - 5:32 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 1:00 PM
Sunset: 7:02 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:09 PM
Moon Transit: 11:49 PM
Moonset: 4:32 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:39 PM - 7:09 PM
4:02 AM - 5:32 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 1:00 PM
Sunset: 7:00 PM
Daylight: 12 hrs mins
Moonrise: 6:26 PM
Moon Transit: 12:00 AM
Moonset: 5:43 AM
Moon Phase: Full
Moon Illumination: 99.6%

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
5:13 AM - 6:43 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 1:00 PM
Sunset: 7:00 PM
Daylight: 12 hrs mins
Moonrise: 6:26 PM
Moon Transit: 12:00 AM
Moonset: 5:43 AM
Moon Phase: Full
Moon Illumination: 99.6%

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
5:13 AM - 6:43 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 1:00 PM
Sunset: 6:58 PM
Daylight: 11 hrs 57 mins
Moonrise: 6:43 PM
Moon Transit: 7:33 AM
Moonset: 6:57 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:13 PM - 7:43 PM
6:27 AM - 7:57 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:01 AM
Sun Transit: 1:00 PM
Sunset: 6:58 PM
Daylight: 11 hrs 57 mins
Moonrise: 6:43 PM
Moon Transit: 7:33 AM
Moonset: 6:57 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

7:03 AM - 9:33 AM
7:03 AM - 9:33 AM

Minor Periods

6:13 PM - 7:43 PM
6:27 AM - 7:57 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 1:00 PM
Sunset: 6:56 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:02 PM
Moon Transit: 1:20 AM
Moonset: 8:13 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:50 AM - 3:20 AM
12:56 AM - 3:26 PM

Minor Periods

6:32 PM - 8:02 PM
7:43 AM - 9:13 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:02 AM
Sun Transit: 1:00 PM
Sunset: 6:56 PM
Daylight: 11 hrs 54 mins
Moonrise: 7:02 PM
Moon Transit: 1:20 AM
Moonset: 8:13 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:50 AM - 3:20 AM
12:56 AM - 3:26 PM

Minor Periods

6:32 PM - 8:02 PM
7:43 AM - 9:13 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:58 AM
Sunset: 6:54 PM
Daylight: 11 hrs 51 mins
Moonrise: 7:25 PM
Moon Transit: 2:08 AM
Moonset: 9:32 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
1:46 PM - 4:16 PM

Minor Periods

6:55 PM - 8:25 PM
9:02 AM - 10:32 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:03 AM
Sun Transit: 12:58 AM
Sunset: 6:54 PM
Daylight: 11 hrs 51 mins
Moonrise: 7:25 PM
Moon Transit: 2:08 AM
Moonset: 9:32 AM
Moon Phase: Full
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

1:38 AM - 4:08 AM
1:46 PM - 4:16 PM

Minor Periods

6:55 PM - 8:25 PM
9:02 AM - 10:32 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:58 AM
Sunset: 6:52 PM
Daylight: 11 hrs 47 mins
Moonrise: 7:53 PM
Moon Transit: 3:00 AM
Moonset: 10:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
2:40 PM - 5:10 PM

Minor Periods

7:23 PM - 8:53 PM
10:24 AM - 11:54 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 12:58 AM
Sunset: 6:52 PM
Daylight: 11 hrs 47 mins
Moonrise: 7:53 PM
Moon Transit: 3:00 AM
Moonset: 10:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.4%

Best Times for Fishing or Hunting

Major Periods

2:30 AM - 5:00 AM
2:40 PM - 5:10 PM

Minor Periods

7:23 PM - 8:53 PM
10:24 AM - 11:54 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 12:58 AM
Sunset: 6:50 PM
Daylight: 11 hrs 44 mins
Moonrise: 8:32 PM
Moon Transit: 3:56 AM
Moonset: 12:16 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.5%

Best Times for Fishing or Hunting

Major Periods

3:26 AM - 5:56 AM
3:39 PM - 6:09 PM

Minor Periods

8:02 PM - 9:32 PM
11:46 AM - 1:16 PM

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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