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

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Lake Superior

Station Name: Lakewood Water Plant
Data Source: USGS

Elevation Above Sea Level: 614 feet / 187 meters

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 (7.0 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 (56.0 mi)
Namekagon River, Cable, WI (56.3 mi)

Weather for Duluth, Minnesota

Current Weather

70.5°F
Mist
Conditions: Mist
Humidity: 88%
Feels Like: 70.5°F
Wind: WNW 4.7 mph
Wind Gusts: 9.6 mph
Pressure: 29.78 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 3 mi
UV Index: 0.2

Five Day Weather Forecast

Overcast
Fri
H: 88°F
L: 57°F
Partly Cloudy
Sat
H: 81°F
L: 61°F
Sunny
Sun
H: 89°F
L: 63°F
Sunny
Mon
H: 93°F
L: 62°F
Patchy rain nearby
Tue
H: 77°F
L: 58°F

Air Quality

AQI: 1 - Good
PM2.5: 13.51 μg/m3
PM10: 14.06 μg/m3
Carbon Monoxide: 308.95 μg/m3
Nitrogen Dioxide: 8.7 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 107 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:13 PM
Sunset: 9:01 PM
Daylight: 15 hrs 36 mins
Moonrise: 10:06 PM
Moon Transit: 1:37 AM
Moonset: 5:47 AM
Moon Phase: Full
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

1:07 AM - 3:37 AM
1:17 PM - 3:47 PM

Minor Periods

9:36 PM - 11:06 PM
5:17 AM - 6:47 AM

Action Rating: 4 out of 5

Air Quality Alert issued July 11 at 3:52PM CDT by NWS Duluth MN

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri July 11, 2025, 3:52 PM
Expires: Mon July 14, 2025, 12:00 PM

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St. Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood. * WHAT...The PM2.5 AQI is expected to reach the Unhealthy for Sensitive Groups (USG) to Unhealthy level. * WHERE...WI Statewide. * WHEN...12 AM CDT Saturday July 12 until 12 PM CDT Monday July 14. * ADDITIONAL DETAILS...Canadian wildfire smoke will impact all of Wisconsin throughout the weekend. Initial impacts are expected for northwestern counties starting as early as midnight Friday night, reaching central Wisconsin by early Saturday afternoon, and southeastern Wisconsin by late Saturday. The heaviest smoke is anticipated for locations farther north, with periods of Very Unhealthy NowCast AQI possible. USG to Unhealthy AQI will be more likely for central and southeastern Wisconsin. The lowest concentrations are expected across southwestern Wisconsin, where Moderate to USG AQI is more likely. By Sunday, PM2.5 concentrations will be generally lower. However, USG to Unhealthy AQI will remain possible statewide, with higher concentrations more likely to the north.

Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms. For more information on current air quality, please see: https://airquality.wi.gov


Air Quality Alert issued July 11 at 3:01PM CDT by NWS Duluth MN

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri July 11, 2025, 3:01 PM
Expires: Mon July 14, 2025, 9:00 AM

* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Purple or Very Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 9 AM CDT Monday. * IMPACTS...The risk of health effects is increased for everyone. * ADDITIONAL DETAILS...Heavy ground-level smoke from wildfires in central Canada moved into northwest Minnesota early Friday morning behind a cold front. This first band of smoke is currently impacting northern Minnesota as it moves east during the day Friday. Air quality will worsen across northeast Minnesota Friday evening as smoke arrives over the region. A second round of smoke will move into northwest Minnesota late Friday evening. This smoke will be more widespread as it moves southeast overnight, and by Saturday afternoon the entire state may be impacted. The heaviest smoke on Saturday will be across the northern half of the state. Air quality will begin to improve across western Minnesota Sunday morning as cleaner air moves in from the west. By Sunday evening, the smoke should be gone from most of the state. Another round of smoke is possible across far northern Minnesota Sunday night.

Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid all physical activities outdoors. The general public should avoid prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.


Air Quality Alert issued July 11 at 3:52PM CDT by NWS Duluth MN

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri July 11, 2025, 3:52 PM
Expires: Mon July 14, 2025, 12:00 PM

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St. Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood. * WHAT...The PM2.5 AQI is expected to reach the Unhealthy for Sensitive Groups (USG) to Unhealthy level. * WHERE...WI Statewide. * WHEN...12 AM CDT Saturday July 12 until 12 PM CDT Monday July 14. * ADDITIONAL DETAILS...Canadian wildfire smoke will impact all of Wisconsin throughout the weekend. Initial impacts are expected for northwestern counties starting as early as midnight Friday night, reaching central Wisconsin by early Saturday afternoon, and southeastern Wisconsin by late Saturday. The heaviest smoke is anticipated for locations farther north, with periods of Very Unhealthy NowCast AQI possible. USG to Unhealthy AQI will be more likely for central and southeastern Wisconsin. The lowest concentrations are expected across southwestern Wisconsin, where Moderate to USG AQI is more likely. By Sunday, PM2.5 concentrations will be generally lower. However, USG to Unhealthy AQI will remain possible statewide, with higher concentrations more likely to the north.

Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms. For more information on current air quality, please see: https://airquality.wi.gov


Air Quality Alert issued July 11 at 3:01PM CDT by NWS Duluth MN

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri July 11, 2025, 3:01 PM
Expires: Mon July 14, 2025, 9:00 AM

* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Purple or Very Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 9 AM CDT Monday. * IMPACTS...The risk of health effects is increased for everyone. * ADDITIONAL DETAILS...Heavy ground-level smoke from wildfires in central Canada moved into northwest Minnesota early Friday morning behind a cold front. This first band of smoke is currently impacting northern Minnesota as it moves east during the day Friday. Air quality will worsen across northeast Minnesota Friday evening as smoke arrives over the region. A second round of smoke will move into northwest Minnesota late Friday evening. This smoke will be more widespread as it moves southeast overnight, and by Saturday afternoon the entire state may be impacted. The heaviest smoke on Saturday will be across the northern half of the state. Air quality will begin to improve across western Minnesota Sunday morning as cleaner air moves in from the west. By Sunday evening, the smoke should be gone from most of the state. Another round of smoke is possible across far northern Minnesota Sunday night.

Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid all physical activities outdoors. The general public should avoid prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.


Air Quality Alert issued July 11 at 3:01PM CDT by NWS Duluth MN

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Fri July 11, 2025, 3:01 PM
Expires: Mon July 14, 2025, 9:00 AM

* WHAT...The Minnesota Pollution Control Agency has issued an Air Quality Alert for fine particles pollution. The Air Quality Index (AQI) is expected to reach the Purple or Very Unhealthy category. * WHERE...North central and northeast Minnesota. * WHEN...Until 9 AM CDT Monday. * IMPACTS...The risk of health effects is increased for everyone. * ADDITIONAL DETAILS...Heavy ground-level smoke from wildfires in central Canada moved into northwest Minnesota early Friday morning behind a cold front. This first band of smoke is currently impacting northern Minnesota as it moves east during the day Friday. Air quality will worsen across northeast Minnesota Friday evening as smoke arrives over the region. A second round of smoke will move into northwest Minnesota late Friday evening. This smoke will be more widespread as it moves southeast overnight, and by Saturday afternoon the entire state may be impacted. The heaviest smoke on Saturday will be across the northern half of the state. Air quality will begin to improve across western Minnesota Sunday morning as cleaner air moves in from the west. By Sunday evening, the smoke should be gone from most of the state. Another round of smoke is possible across far northern Minnesota Sunday night.

Sensitive groups, such as people with lung disease (including asthma), heart disease, and children and older adults, should avoid all physical activities outdoors. The general public should avoid prolonged or heavy exertion. Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible. Keep windows closed overnight to prevent smoke from getting indoors.


Friday, July 11, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 70.5°F
Average Humidity: 80%
Chance of Rain: 0%
Wind: 11 mph
UV Index: 2.2

Air Quality

AQI: 1 - Good
PM2.5: 11.03 μg/m3
PM10: 11.43 μg/m3
Carbon Monoxide: 343.95 μg/m3
Nitrogen Dioxide: 6.47 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 89.64 μg/m3

Astronomical

Sunrise: 5:25 AM
Sun Transit: 1:13 PM
Sunset: 9:01 PM
Daylight: 15 hrs 36 mins
Moonrise: 10:06 PM
Moon Transit: 1:37 AM
Moonset: 5:47 AM
Moon Phase: Full
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

1:07 AM - 3:37 AM
1:17 PM - 3:47 PM

Minor Periods

9:36 PM - 11:06 PM
5:17 AM - 6:47 AM

Action Rating: 4 out of 5

Saturday, July 12, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 70.2°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 11 mph
UV Index: 0.6

Air Quality

AQI: 2 - Moderate
PM2.5: 17.18 μg/m3
PM10: 17.51 μg/m3
Carbon Monoxide: 344.91 μg/m3
Nitrogen Dioxide: 6 μg/m3
Sulphur Dioxide: 1.64 μg/m3
Ozone: 101.6 μg/m3

Astronomical

Sunrise: 5:26 AM
Sun Transit: 1:13 PM
Sunset: 9:01 PM
Daylight: 15 hrs 35 mins
Moonrise: 10:32 PM
Moon Transit: 2:30 AM
Moonset: 7:03 AM
Moon Phase: Full
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

2:00 AM - 4:30 AM
2:09 PM - 4:39 PM

Minor Periods

10:02 PM - 11:32 PM
6:33 AM - 8:03 AM

Action Rating: 3 out of 5

Sunday, July 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 75.7°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 13.4 mph
UV Index: 2

Air Quality

AQI: 2 - Moderate
PM2.5: 23.54 μg/m3
PM10: 23.74 μg/m3
Carbon Monoxide: 480.78 μg/m3
Nitrogen Dioxide: 6.64 μg/m3
Sulphur Dioxide: 3.1 μg/m3
Ozone: 106.96 μg/m3

Astronomical

Sunrise: 5:27 AM
Sun Transit: 1:13 PM
Sunset: 9:00 PM
Daylight: 15 hrs 33 mins
Moonrise: 10:52 PM
Moon Transit: 3:20 AM
Moonset: 8:20 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

2:50 AM - 5:20 AM
2:58 PM - 5:28 PM

Minor Periods

10:22 PM - 11:52 PM
7:50 AM - 9:20 AM

Action Rating: 3 out of 5

Monday, July 14, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 77.3°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 6.9 mph
UV Index: 1.4

Air Quality

AQI: 1 - Good
PM2.5: 13.14 μg/m3
PM10: 13.36 μg/m3
Carbon Monoxide: 381.77 μg/m3
Nitrogen Dioxide: 7.98 μg/m3
Sulphur Dioxide: 3.23 μg/m3
Ozone: 117.88 μg/m3

Astronomical

Sunrise: 5:28 AM
Sun Transit: 1:13 PM
Sunset: 8:59 PM
Daylight: 15 hrs 31 mins
Moonrise: 11:09 PM
Moon Transit: 4:08 AM
Moonset: 9:37 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

3:38 AM - 6:08 AM
3:45 PM - 6:15 PM

Minor Periods

12:00 AM - 12:00 AM
9:07 AM - 10:37 AM

Action Rating: 2 out of 5

Tuesday, July 15, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 66.2°F
Average Humidity: 78%
Chance of Rain: 85%
Wind: 12.8 mph
UV Index: 1.6

Air Quality

AQI: 1 - Good
PM2.5: 8.14 μg/m3
PM10: 8.4 μg/m3
Carbon Monoxide: 384.94 μg/m3
Nitrogen Dioxide: 6.56 μg/m3
Sulphur Dioxide: 1.57 μg/m3
Ozone: 102.15 μg/m3

Astronomical

Sunrise: 5:29 AM
Sun Transit: 1:13 PM
Sunset: 8:58 PM
Daylight: 15 hrs 30 mins
Moonrise: 12:09 AM
Moon Transit: 4:54 AM
Moonset: 10:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.7%

Best Times for Fishing or Hunting

Major Periods

4:24 AM - 6:54 AM
12:00 AM - 12:00 AM

Minor Periods

10:24 AM - 11:54 AM
12:00 AM - 12:00 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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