Water Temperature of Duluth Harbor in Duluth, MN

Current Water Temperature

49.3°F

Measurement Time: Friday, November 28, 2025, 2:18 AM CST

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

32.5°F
Mist
Mist
29.2°F
34°F
100%
ENE 3.6 mph
6.8 mph
29.3°F
33.6°F
0 in
100%
0 mi
1008 mbar
1

Five Day Weather Forecast

Light freezing rain
Fri
H: 34°F
L: 30°F
Patchy rain nearby
Sat
H: 44°F
L: 26°F
Partly Cloudy
Sun
H: 49°F
L: 32°F
Cloudy
Mon
H: 42°F
L: 27°F
Blizzard
Tue
H: 26°F
L: 23°F

Air Quality

AQI: 1 - Good
PM2.5: 6.65 μg/m3
PM10: 6.75 μg/m3
Carbon Monoxide: 213.85 μg/m3
Nitrogen Dioxide: 10.05 μg/m3
Sulphur Dioxide: 2.65 μg/m3
Ozone: 42 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 12:19 AM
Sunset: 6:02 PM
Daylight: 11 hrs 23 mins
Moonrise: 10:03 PM
Moon Transit: 2:19 AM
Moonset: 7:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

1:49 AM - 4:19 AM
1:54 PM - 4:24 PM

Minor Periods

9:33 PM - 11:03 PM
7:05 AM - 8:35 AM

Action Rating: 3 out of 5

Dense Fog Advisory issued March 6 at 1:11AM CST until March 6 at 12:00PM CST by NWS Duluth MN

Effective: Fri March 6, 2026, 1:11 AM
Expires: Fri March 6, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...In Minnesota, Carlton and South St. Louis, Southern Cook and Southern Lake Counties. In Wisconsin, Bayfield and Douglas Counties. This includes the Tribal Lands of the Fond du Lac Band, the Grand Portage Reservation and the Red Cliff Band. Other locations including the Apostle Islands National Lakeshore. * WHEN...Until noon CST today. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...The worst conditions with the poorest visibilities are being reported closer to Lake Superior.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Winter Weather Advisory issued March 6 at 11:31AM CST until March 6 at 1:00PM CST by NWS Duluth MN

Effective: Fri March 6, 2026, 11:31 AM
Expires: Fri March 6, 2026, 11:45 PM

* WHAT...For the first Winter Weather Advisory, freezing drizzle. For the second Winter Weather Advisory, mixed precipitation expected. Total snow accumulations up to one inch and ice accumulations up to 0.10". * WHERE...Carlton and South St. Louis, Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Fond du Lac Band and the Grand Portage Reservation. * WHEN...For the first Winter Weather Advisory, until 1 PM CST this afternoon. For the second Winter Weather Advisory, from 4 PM this afternoon to 3 AM CST Saturday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute. Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...For this evening, temperatures will fall below freezing in the west first and transition to below freezing eastward through the evening.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.


Winter Weather Advisory issued March 6 at 11:31AM CST until March 7 at 3:00AM CST by NWS Duluth MN

Effective: Fri March 6, 2026, 11:31 AM
Expires: Fri March 6, 2026, 11:45 PM

* WHAT...For the first Winter Weather Advisory, freezing drizzle. For the second Winter Weather Advisory, mixed precipitation expected. Total snow accumulations up to one inch and ice accumulations up to 0.10". * WHERE...Carlton and South St. Louis, Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Fond du Lac Band and the Grand Portage Reservation. * WHEN...For the first Winter Weather Advisory, until 1 PM CST this afternoon. For the second Winter Weather Advisory, from 4 PM this afternoon to 3 AM CST Saturday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute. Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...For this evening, temperatures will fall below freezing in the west first and transition to below freezing eastward through the evening.

Slow down and use caution while traveling. Call 511 or visit www.511mn.org for Minnesota road information.


Dense Fog Advisory issued March 6 at 11:10AM CST until March 6 at 9:00PM CST by NWS Duluth MN

Effective: Fri March 6, 2026, 11:10 AM
Expires: Fri March 6, 2026, 9:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Carlton and South St. Louis, Southern Cook and Southern Lake Counties. This includes the Tribal Lands of the Fond du Lac Band and the Grand Portage Reservation. * WHEN...Until 9 PM CST this evening. * IMPACTS...Low visibility could make driving conditions hazardous. In areas where temperatures are near or below freezing, the fog could result in icy roads, sidewalks, and other surfaces. * ADDITIONAL DETAILS...Temperatures will rise above freezing after 1 PM this afternoon ending the freezing fog threat.

If driving, slow down, use your low-beam headlights and fog lights, and leave plenty of distance ahead of you.


Friday, March 6, 2026

Weather Forecast

Light freezing rain
34.3°F
29.7°F
32.9°F
98%
0.12 in
89%
37%
8.7 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 6.49 μg/m3
PM10: 6.76 μg/m3
Carbon Monoxide: 246.81 μg/m3
Nitrogen Dioxide: 5.34 μg/m3
Sulphur Dioxide: 1.54 μg/m3
Ozone: 62.72 μg/m3

Astronomical

Sunrise: 6:39 AM
Sun Transit: 12:19 AM
Sunset: 6:02 PM
Daylight: 11 hrs 23 mins
Moonrise: 10:03 PM
Moon Transit: 2:19 AM
Moonset: 7:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.6%

Best Times for Fishing or Hunting

Major Periods

1:49 AM - 4:19 AM
1:54 PM - 4:24 PM

Minor Periods

9:33 PM - 11:03 PM
7:05 AM - 8:35 AM

Action Rating: 3 out of 5

Saturday, March 7, 2026

Weather Forecast

Patchy rain nearby
43.7°F
26.2°F
34.8°F
80%
0.13 in
80%
11%
13.6 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 2.93 μg/m3
Carbon Monoxide: 205.93 μg/m3
Nitrogen Dioxide: 4.59 μg/m3
Sulphur Dioxide: 1.95 μg/m3
Ozone: 72.84 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 12:19 AM
Sunset: 6:03 PM
Daylight: 11 hrs 26 mins
Moonrise: 11:13 PM
Moon Transit: 3:03 AM
Moonset: 7:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.2%

Best Times for Fishing or Hunting

Major Periods

2:33 AM - 5:03 AM
2:38 PM - 5:08 PM

Minor Periods

12:00 AM - 12:00 AM
7:24 AM - 8:54 AM

Action Rating: 2 out of 5

Sunday, March 8, 2026

Weather Forecast

Partly Cloudy
48.7°F
31.5°F
40.1°F
82%
0 in
0%
0%
18.3 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 2.83 μg/m3
PM10: 3.29 μg/m3
Carbon Monoxide: 173.13 μg/m3
Nitrogen Dioxide: 3.53 μg/m3
Sulphur Dioxide: 2.03 μg/m3
Ozone: 78.72 μg/m3

Astronomical

Sunrise: 6:35 AM
Sun Transit: 12:19 AM
Sunset: 6:04 PM
Daylight: 11 hrs 30 mins
Moonrise: 12:13 AM
Moon Transit: 3:48 AM
Moonset: 8:16 AM
Moon Phase: Waning Gibbous
Moon Illumination: 69.3%

Best Times for Fishing or Hunting

Major Periods

3:18 AM - 5:48 AM
3:24 PM - 5:54 PM

Minor Periods

7:46 AM - 9:16 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, March 9, 2026

Weather Forecast

Cloudy
41.9°F
27°F
38°F
73%
0 in
0%
0%
16.8 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 3.1 μg/m3
PM10: 3.79 μg/m3
Carbon Monoxide: 170.2 μg/m3
Nitrogen Dioxide: 2.97 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 87.08 μg/m3

Astronomical

Sunrise: 6:33 AM
Sun Transit: 12:00 AM
Sunset: 6:06 PM
Daylight: 11 hrs 33 mins
Moonrise: 12:22 AM
Moon Transit: 4:35 AM
Moonset: 8:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 58.5%

Best Times for Fishing or Hunting

Major Periods

4:05 AM - 6:35 AM
4:12 PM - 6:42 PM

Minor Periods

8:13 AM - 9:43 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Tuesday, March 10, 2026

Weather Forecast

Blizzard
25.7°F
22.7°F
24.4°F
80%
0.43 in
67%
52%
18.6 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 1.97 μg/m3
PM10: 2.26 μg/m3
Carbon Monoxide: 182.39 μg/m3
Nitrogen Dioxide: 2.58 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 82.5 μg/m3

Astronomical

Sunrise: 6:31 AM
Sun Transit: 12:00 AM
Sunset: 6:07 PM
Daylight: 11 hrs 36 mins
Moonrise: 1:28 AM
Moon Transit: 5:24 AM
Moonset: 9:18 AM
Moon Phase: Last Quarter
Moon Illumination: 47.2%

Best Times for Fishing or Hunting

Major Periods

4:54 AM - 7:24 AM
5:03 PM - 7:33 PM

Minor Periods

8:48 AM - 10:18 AM
12:58 AM - 2:28 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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