Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

47.3°F

Measurement Time: Tuesday, July 28, 2026, 10:20 AM CDT

Temperature Locations

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Local Points of Interest

Pleasant Prairie, WI

Lake Michigan

Station Name: Winthrop Harbor Buoy, IL
Station Type: Buoy
Data Source: National Data Buoy Center

Elevation Above Sea Level: 574 feet

Nearest Address:
Offshore
Winthrop Harbor, IL 60096
Lake County

GPS Coordinates: 42.491, -87.779

Nearby Water Temperatures

Lake Michigan, Waukegan, IL (8.5 mi)
Lake Michigan, Racine, WI (16.1 mi)
Fox River, Burlington, WI (24.2 mi)
Lake Michigan, Wilmette, IL (25.4 mi)
Fox River, McHenry, IL (26.8 mi)
Root River, Franklin, WI (27.4 mi)
Lake Michigan, Milwaukee, WI (37.3 mi)
Honey Creek, Wauwatosa, WI (39.9 mi)
Lake Michigan, Lake Michigan, MI (40.3 mi)
Eagle Spring Lake, Mukwonago, WI (41.7 mi)
Lake Michigan, Chicago, IL (42.8 mi)
Chicago River, Chicago, IL (45.4 mi)
Cal-Sag Channel, Blue Island, IL (58.2 mi)
Grand Calumet River, Chicago, IL (59.2 mi)
Indiana Harbor Canal, East Chicago, IN (60.3 mi)

Weather Near Winthrop Harbor, Illinois

Current Weather

72.3°F

Conditions: Partly Cloudy

Feels Like: 70.9°F

Heat Index: 76.5°F

Humidity: 87%

Wind: N 14.8 mph

Wind Gusts: 17 mph

Wind Chill: 72.3°F

Dew Point: 68.2°F

Precipitation: 0 in

Cloud Cover: 61%

Visibility: 6 mi

Air Pressure: 1012 mbar

UV Index: 6.6

Five Day Weather Forecast

Sun
H: 78°F
L: 65°F

Mon
H: 75°F
L: 64°F

Tue
H: 79°F
L: 64°F

Wed
H: 79°F
L: 65°F

Thu
H: 75°F
L: 67°F

Air Quality

AQI: 1 - Good

PM2.5: 9.4 μg/m3

PM10: 9.8 μg/m3

Carbon Monoxide: 131 μg/m3
Nitrogen Dioxide: 1.8 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 100 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:57 AM
Sunset: 8:10 PM
Daylight: 14 hrs 25 mins

Moonrise: 9:58 PM
Moon Transit: 3:40 AM
Moonset: 9:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
5:20 PM - 7:50 PM

Minor Periods

9:28 PM - 10:58 PM
9:24 AM - 10:54 AM

Action Rating: 4 out of 5

Beach Hazards Statement issued August 2 at 3:15AM CDT until August 3 at 9:00AM CDT by NWS Chicago IL

Effective: Sun August 2, 2026, 3:15 AM
Expires: Sun August 2, 2026, 11:15 AM

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 5 to 8 feet expected. * WHERE...Lake IL, Northern Cook and Central Cook Counties. * WHEN...Through Monday morning. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers. For information on swim advisories or bans at Chicago beaches: www. cpdbeaches. com.

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

Small Craft Advisory issued August 2 at 3:09AM CDT until August 3 at 3:00AM CDT by NWS Chicago IL

Effective: Sun August 2, 2026, 3:09 AM
Expires: Sun August 2, 2026, 11:15 AM

* WHAT...North winds to 30 kt and significant waves to 8 ft occasionally to 10 ft. * WHERE...Winthrop Harbor to Calumet Harbor IL. * WHEN...Until 3 AM CDT Monday. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

Sunday, August 2, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 78.3°F

Low Temperature: 64.8°F

Average Temperature: 69.8°F

Average Humidity: 87%

Precipitation: 0.01 in

Chance of Rain: 28%

Chance of Snow: 0%

Maximum Wind: 15.4 mph

UV Index: 6.6

Air Quality

AQI: 1 - Good

PM2.5: 9.95 μg/m3

PM10: 10.26 μg/m3

Carbon Monoxide: 133.63 μg/m3
Nitrogen Dioxide: 2.97 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 80.58 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 12:57 AM
Sunset: 8:10 PM
Daylight: 14 hrs 25 mins

Moonrise: 9:58 PM
Moon Transit: 3:40 AM
Moonset: 9:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 75.9%

Best Times for Fishing or Hunting

Major Periods

3:10 AM - 5:40 AM
5:20 PM - 7:50 PM

Minor Periods

9:28 PM - 10:58 PM
9:24 AM - 10:54 AM

Action Rating: 4 out of 5

Monday, August 3, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 74.6°F

Low Temperature: 63.8°F

Average Temperature: 68.7°F

Average Humidity: 78%

Precipitation: 0 in

Chance of Rain: 10%

Chance of Snow: 0%

Maximum Wind: 8.3 mph

UV Index: 8.7

Air Quality

AQI: 1 - Good

PM2.5: 5.97 μg/m3

PM10: 6.15 μg/m3

Carbon Monoxide: 131.54 μg/m3
Nitrogen Dioxide: 5.18 μg/m3
Sulphur Dioxide: 0.97 μg/m3
Ozone: 72.46 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 12:57 AM
Sunset: 8:09 PM
Daylight: 14 hrs 23 mins

Moonrise: 10:20 PM
Moon Transit: 12:00 AM
Moonset: 11:02 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:34 PM - 7:04 PM

Minor Periods

9:50 PM - 11:20 PM
10:32 AM - 12:02 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 79°F

Low Temperature: 63.5°F

Average Temperature: 71.3°F

Average Humidity: 73%

Precipitation: 0 in

Chance of Rain: 6%

Chance of Snow: 0%

Maximum Wind: 8.1 mph

UV Index: 9.1

Air Quality

AQI: 1 - Good

PM2.5: 10.59 μg/m3

PM10: 10.74 μg/m3

Carbon Monoxide: 183.17 μg/m3
Nitrogen Dioxide: 13.53 μg/m3
Sulphur Dioxide: 3.23 μg/m3
Ozone: 79.38 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:57 AM
Sunset: 8:07 PM
Daylight: 14 hrs 21 mins

Moonrise: 10:44 PM
Moon Transit: 5:09 AM
Moonset: 12:13 AM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

4:39 AM - 7:09 AM
5:21 PM - 7:51 PM

Minor Periods

10:14 PM - 11:44 PM
11:43 AM - 1:13 PM

Action Rating: 3 out of 5

Wednesday, August 5, 2026

Weather Forecast

Conditions: Sunny

High Temperature: 79.1°F

Low Temperature: 65°F

Average Temperature: 72.6°F

Average Humidity: 77%

Precipitation: 0.06 in

Chance of Rain: 57%

Chance of Snow: 0%

Maximum Wind: 6.5 mph

UV Index: 7.9

Air Quality

AQI: 1 - Good

PM2.5: 6.83 μg/m3

PM10: 7.03 μg/m3

Carbon Monoxide: 186.97 μg/m3
Nitrogen Dioxide: 9.48 μg/m3
Sulphur Dioxide: 1.46 μg/m3
Ozone: 75.25 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:57 AM
Sunset: 8:06 PM
Daylight: 14 hrs 19 mins

Moonrise: 11:13 PM
Moon Transit: 5:58 AM
Moonset: 1:27 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

5:28 AM - 7:58 AM
6:12 PM - 8:42 PM

Minor Periods

12:00 AM - 12:00 AM
12:57 AM - 2:27 PM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Conditions: Patchy rain nearby

High Temperature: 74.6°F

Low Temperature: 66.6°F

Average Temperature: 69.6°F

Average Humidity: 86%

Precipitation: 0.82 in

Chance of Rain: 84%

Chance of Snow: 0%

Maximum Wind: 14.8 mph

UV Index: 6

Air Quality

AQI: 1 - Good

PM2.5: 5.74 μg/m3

PM10: 6.16 μg/m3

Carbon Monoxide: 216.38 μg/m3
Nitrogen Dioxide: 12.9 μg/m3
Sulphur Dioxide: 0.66 μg/m3
Ozone: 47.75 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 12:57 AM
Sunset: 8:05 PM
Daylight: 14 hrs 16 mins

Moonrise: 12:13 AM
Moon Transit: 6:51 AM
Moonset: 2:44 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

6:21 AM - 8:51 AM
7:09 PM - 9:39 PM

Minor Periods

2:14 PM - 3:44 PM
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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Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

Temperature Locations

Local Points of Interest

Nearby Water Temperatures

Weather Near Winthrop Harbor, Illinois

Current Weather

Five Day Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Beach Hazards Statement issued August 2 at 3:15AM CDT until August 3 at 9:00AM CDT by NWS Chicago IL

Small Craft Advisory issued August 2 at 3:09AM CDT until August 3 at 3:00AM CDT by NWS Chicago IL

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Weather Forecast

Air Quality

Astronomical

Best Times for Fishing or Hunting

Major Periods

Minor Periods

Webcams Near Winthrop Harbor, IL

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