Water Temperature of Duluth Harbor in Duluth, MN

Current Water Temperature

49.6°F

Measurement Time: Monday, May 25, 2026, 10:18 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

55.8°F
Clear
Clear
55.8°F
59.8°F
100%
W 3.6 mph
7.5 mph
60°F
51.3°F
0 in
0%
9 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 70°F
L: 47°F
Sunny
Wed
H: 58°F
L: 44°F
Sunny
Thu
H: 61°F
L: 44°F
Patchy rain nearby
Fri
H: 73°F
L: 46°F
Sunny
Sat
H: 55°F
L: 40°F

Air Quality

AQI: 1 - Good
PM2.5: 9.05 μg/m3
PM10: 9.85 μg/m3
Carbon Monoxide: 153.85 μg/m3
Nitrogen Dioxide: 5.15 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 1:05 PM
Sunset: 8:49 PM
Daylight: 15 hrs 27 mins
Moonrise: 4:26 PM
Moon Transit: 9:53 PM
Moonset: 2:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
9:23 PM - 11:53 PM

Minor Periods

3:56 PM - 5:26 PM
2:24 AM - 3:54 AM

Action Rating: 2 out of 5

Tuesday, May 26, 2026

Weather Forecast

Sunny
69.8°F
47°F
59.5°F
71%
0 in
0%
0%
8.1 mph
6.7


Air Quality

AQI: 1 - Good
PM2.5: 7.78 μg/m3
PM10: 8.56 μg/m3
Carbon Monoxide: 169.69 μg/m3
Nitrogen Dioxide: 5.8 μg/m3
Sulphur Dioxide: 1.59 μg/m3
Ozone: 77.52 μg/m3

Astronomical

Sunrise: 5:22 AM
Sun Transit: 1:05 PM
Sunset: 8:49 PM
Daylight: 15 hrs 27 mins
Moonrise: 4:26 PM
Moon Transit: 9:53 PM
Moonset: 2:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

8:45 AM - 11:15 AM
9:23 PM - 11:53 PM

Minor Periods

3:56 PM - 5:26 PM
2:24 AM - 3:54 AM

Action Rating: 2 out of 5

Wednesday, May 27, 2026

Weather Forecast

Sunny
58.3°F
43.7°F
51.1°F
79%
0 in
0%
0%
16.8 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 6.05 μg/m3
PM10: 6.46 μg/m3
Carbon Monoxide: 143.97 μg/m3
Nitrogen Dioxide: 5.09 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 66.48 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 1:05 PM
Sunset: 8:50 PM
Daylight: 15 hrs 29 mins
Moonrise: 5:34 PM
Moon Transit: 10:36 PM
Moonset: 3:10 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

9:27 AM - 11:57 AM
12:00 AM - 12:00 AM

Minor Periods

5:04 PM - 6:34 PM
2:40 AM - 4:10 AM

Action Rating: 2 out of 5

Thursday, May 28, 2026

Weather Forecast

Sunny
60.7°F
43.6°F
51.4°F
72%
0 in
0%
0%
8.1 mph
7.4


Air Quality

AQI: 1 - Good
PM2.5: 2.9 μg/m3
PM10: 3.06 μg/m3
Carbon Monoxide: 131.65 μg/m3
Nitrogen Dioxide: 4.13 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 67.8 μg/m3

Astronomical

Sunrise: 5:21 AM
Sun Transit: 1:05 PM
Sunset: 8:51 PM
Daylight: 15 hrs 31 mins
Moonrise: 6:43 PM
Moon Transit: 11:20 PM
Moonset: 3:29 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

10:11 AM - 12:41 AM
12:00 AM - 12:00 AM

Minor Periods

6:13 PM - 7:43 PM
2:59 AM - 4:29 AM

Action Rating: 2 out of 5

Friday, May 29, 2026

Weather Forecast

Patchy rain nearby
73.2°F
46.3°F
55.6°F
82%
0.1 in
89%
0%
19.5 mph
7.1


Air Quality

AQI: 1 - Good
PM2.5: 10.37 μg/m3
PM10: 11.19 μg/m3
Carbon Monoxide: 175.56 μg/m3
Nitrogen Dioxide: 9.3 μg/m3
Sulphur Dioxide: 1.64 μg/m3
Ozone: 65.28 μg/m3

Astronomical

Sunrise: 5:20 AM
Sun Transit: 1:05 PM
Sunset: 8:52 PM
Daylight: 15 hrs 33 mins
Moonrise: 7:51 PM
Moon Transit: 12:00 AM
Moonset: 3:51 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:56 AM - 1:26 PM

Minor Periods

7:21 PM - 8:51 PM
3:21 AM - 4:51 AM

Action Rating: 4 out of 5

Saturday, May 30, 2026

Weather Forecast

Sunny
54.7°F
39.6°F
47.7°F
74%
0 in
0%
0%
15 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.46 μg/m3
PM10: 7.27 μg/m3
Carbon Monoxide: 165.14 μg/m3
Nitrogen Dioxide: 6.29 μg/m3
Sulphur Dioxide: 1.18 μg/m3
Ozone: 67.85 μg/m3

Astronomical

Sunrise: 5:19 AM
Sun Transit: 1:06 PM
Sunset: 8:53 PM
Daylight: 15 hrs 34 mins
Moonrise: 8:57 PM
Moon Transit: 12:07 AM
Moonset: 4:19 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:44 AM - 2:14 PM

Minor Periods

8:27 PM - 9:57 PM
3:49 AM - 5:19 AM

Action Rating: 5 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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