Water Temperature of Lake Michigan Near Winthrop Harbor, IL

Current Water Temperature

53.4°F 11.9°C
Cold Thermal Gear Required
53.4°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Cold shock risk with rapid dexterity loss (10–15 mins). Wetsuit or drysuit strongly advised for any immersion.

Measurement Time: Friday, October 30, 2026, 1:50 PM CDT

Temperature Locations

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Local Points of Interest

Pleasant Prairie, WI

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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

42.3°F
Overcast
Conditions: Overcast
Humidity: 68%
Feels Like: 34.5°F
Wind: SW 15.7 mph
Wind Gusts: 33.1 mph
Pressure: 29.99 in
Precipitation: 0 in
Cloud Cover: 94%
Visibility: 6 mi
UV Index: 0

Weather Forecast

Sunny
Sun
H: 58°F
L: 42°F
Sunny
Mon
H: 56°F
L: 42°F
Sunny
Tue
H: 57°F
L: 47°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
7.5 μg/m³
Good
PM10
7.6 μg/m³
Good
Ozone (O3)
44 μg/m³
Photochemical
NO2
6.9 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
154 μg/m³
Carbon Monoxide

Astronomical

Sun
10h 2m daylight
Sunrise 6:34 AM
Solar Noon 11:34 AM
Sunset 4:36 PM
Moon
New • 0%
Moonrise 6:04 AM
Transit 11:01 AM
Moonset 3:52 PM

Best Times for Fishing or Hunting

Major Periods

10:31 AM - 1:01 PM
10:55 PM - 1:25 AM

Minor Periods

5:34 AM - 7:04 AM
3:22 PM - 4:52 PM
Action Rating:
Very Good 4/5

Small Craft Advisory issued November 8 at 12:29AM CST until November 8 at 6:00PM CST by NWS Milwaukee/Sullivan WI

Effective: Sun November 8, 2026, 12:29 AM
Expires: Sun November 8, 2026, 8:30 AM

* WHAT...West to northwest winds 15 to 20 kt with gusts up to 30 kt expected. * WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL. * WHEN...From 6 AM this morning to 6 PM CST this evening. * IMPACTS...Conditions will be hazardous to small craft.
Sunday, November 8, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 48.8°F
Average Humidity: 65%
Chance of Rain: 5%
Wind: 17.4 mph
UV Index: 2.4

Astronomical

Sun
10h 2m daylight
Sunrise 6:34 AM
Solar Noon 11:34 AM
Sunset 4:36 PM
Moon
New • 0%
Moonrise 6:04 AM
Transit 11:01 AM
Moonset 3:52 PM

Best Times for Fishing or Hunting

Major Periods

10:31 AM - 1:01 PM
10:55 PM - 1:25 AM

Minor Periods

5:34 AM - 7:04 AM
3:22 PM - 4:52 PM
Action Rating:
Very Good 4/5
Monday, November 9, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 49.1°F
Average Humidity: 67%
Chance of Rain: 10%
Wind: 12.8 mph
UV Index: 1.9

Astronomical

Sun
10h 0m daylight
Sunrise 6:35 AM
Solar Noon 11:34 AM
Sunset 4:35 PM
Moon
New • 2%
Moonrise 7:11 AM
Transit 11:50 AM
Moonset 4:23 PM

Best Times for Fishing or Hunting

Major Periods

11:20 AM - 1:50 PM
11:45 PM - 2:15 AM

Minor Periods

6:41 AM - 8:11 AM
3:53 PM - 5:23 PM
Action Rating:
Very Good 4/5
Tuesday, November 10, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 51.5°F
Average Humidity: 66%
Chance of Rain: 6%
Wind: 11.2 mph
UV Index: 2.2

Astronomical

Sun
9h 57m daylight
Sunrise 6:36 AM
Solar Noon 11:35 AM
Sunset 4:34 PM
Moon
New • 0%
Moonrise 8:16 AM
Transit 12:40 PM
Moonset 5:00 PM

Best Times for Fishing or Hunting

Major Periods

12:10 PM - 2:40 PM
11:44 PM - 2:14 AM

Minor Periods

7:46 AM - 9:16 AM
4:30 PM - 6:00 PM
Action Rating:
Very Good 4/5
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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