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)

Marine Weather for Lake Michigan Near Winthrop Harbor, IL

Marine Weather

Coastal & Marine Conditions
Open-Meteo Marine
3.6ft 1.1 m
Moderate Chop Noticeable waves and spray. Small craft exercise standard caution.
Wave Period 5.5s
Wave Direction 22° NNE
Swell Waves
3.2 ft
5s • 28° NNE
Wind Waves / Chop
1.6 ft
2.7s • 331° NNW
High and low tide forecasts are not applicable for freshwater lake stations.

5-Day Marine Wave Forecast

Today
Nov 14
4.3 ft
5.6s • NNE
Sun
Nov 15
1.7 ft
4.9s • NNE
Mon
Nov 16
0.8 ft
3.9s • ENE
Tue
Nov 17
1.1 ft
2.7s • S
Wed
Nov 18
2.2 ft
3.5s • SSE

Weather Near Winthrop Harbor, Illinois

Current Weather

31.1°F
Clear
Conditions: Clear
Humidity: 81%
Feels Like: 21.6°F
Wind: NW 11.4 mph
Wind Gusts: 21.9 mph
Pressure: 30.19 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 10.9 mi
UV Index: 0

Five-Day Weather Forecast

Overcast
Sat
H: 45°F
L: 30°F
Overcast
Sun
H: 46°F
L: 31°F
Overcast
Mon
H: 51°F
L: 37°F
Overcast
Tue
H: 52°F
L: 39°F
Overcast
Wed
H: 55°F
L: 44°F

Air Quality

EPA Index 1 • Good

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

PM2.5
1.1 μg/m³
Good
PM10
1.2 μg/m³
Good
Ozone (O3)
61 μg/m³
Photochemical
NO2
3 μg/m³
Nitrogen Dioxide
SO2
0.3 μg/m³
Sulfur Dioxide
CO
125 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 48m daylight
Sunrise 6:41 AM
Solar Noon 11:35 AM
Sunset 4:30 PM
Moon
Waxing Crescent • 21%
Moonrise 11:32 AM
Transit 4:02 PM
Moonset 8:38 PM

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
3:32 PM - 6:02 PM

Minor Periods

11:02 AM - 12:32 PM
8:08 PM - 9:38 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 36.3°F
Average Humidity: 70%
Chance of Rain: 3%
Wind: 12.7 mph
UV Index: 2.8

Air Quality

EPA Index 1 • Good
PM2.5
1.4 μg/m³
Good
PM10
1.5 μg/m³
Good
Ozone (O3)
63.9 μg/m³
Photochemical
NO2
3.5 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
138 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 48m daylight
Sunrise 6:41 AM
Solar Noon 11:35 AM
Sunset 4:30 PM
Moon
Waxing Crescent • 21%
Moonrise 11:32 AM
Transit 4:02 PM
Moonset 8:38 PM

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
3:32 PM - 6:02 PM

Minor Periods

11:02 AM - 12:32 PM
8:08 PM - 9:38 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 37°F
Average Humidity: 73%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 2.8

Air Quality

EPA Index 1 • Good
PM2.5
3.8 μg/m³
Good
PM10
4 μg/m³
Good
Ozone (O3)
63.5 μg/m³
Photochemical
NO2
6.3 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
176.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 46m daylight
Sunrise 6:43 AM
Solar Noon 11:35 AM
Sunset 4:29 PM
Moon
Waxing Crescent • 31%
Moonrise 12:03 PM
Transit 4:48 PM
Moonset 9:42 PM

Best Times for Fishing or Hunting

Major Periods

3:55 AM - 6:25 AM
4:18 PM - 6:48 PM

Minor Periods

11:33 AM - 1:03 PM
9:12 PM - 10:42 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 43°F
Average Humidity: 65%
Chance of Rain: 0%
Wind: 8.9 mph
UV Index: 2.8

Air Quality

EPA Index 2 • Moderate
PM2.5
13.5 μg/m³
Moderate
PM10
13.8 μg/m³
Good
Ozone (O3)
30.6 μg/m³
Photochemical
NO2
32.4 μg/m³
Nitrogen Dioxide
SO2
3.7 μg/m³
Sulfur Dioxide
CO
225.4 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 44m daylight
Sunrise 6:44 AM
Solar Noon 11:35 AM
Sunset 4:28 PM
Moon
First Quarter • 42%
Moonrise 12:29 PM
Transit 5:33 PM
Moonset 10:46 PM

Best Times for Fishing or Hunting

Major Periods

4:41 AM - 7:11 AM
5:03 PM - 7:33 PM

Minor Periods

11:59 AM - 1:29 PM
10:16 PM - 11:46 PM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 45.3°F
Average Humidity: 61%
Chance of Rain: 0%
Wind: 12.3 mph
UV Index: 2.7

Air Quality

EPA Index 2 • Moderate
PM2.5
14 μg/m³
Moderate
PM10
14.1 μg/m³
Good
Ozone (O3)
30.8 μg/m³
Photochemical
NO2
25.8 μg/m³
Nitrogen Dioxide
SO2
3.2 μg/m³
Sulfur Dioxide
CO
212.7 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 42m daylight
Sunrise 6:45 AM
Solar Noon 11:36 AM
Sunset 4:27 PM
Moon
First Quarter • 54%
Moonrise 12:51 PM
Transit 6:16 PM
Moonset 11:51 PM

Best Times for Fishing or Hunting

Major Periods

5:24 AM - 7:54 AM
5:46 PM - 8:16 PM

Minor Periods

12:21 PM - 1:51 PM
11:21 PM - 12:51 AM
Action Rating:
Fair Action 2/5
Wednesday, November 18, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 49.8°F
Average Humidity: 53%
Chance of Rain: 1%
Wind: 16.6 mph
UV Index: 2.8

Air Quality

EPA Index 2 • Moderate
PM2.5
10.2 μg/m³
Good
PM10
10.3 μg/m³
Good
Ozone (O3)
46.3 μg/m³
Photochemical
NO2
18.3 μg/m³
Nitrogen Dioxide
SO2
2.3 μg/m³
Sulfur Dioxide
CO
213.3 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 40m daylight
Sunrise 6:46 AM
Solar Noon 11:36 AM
Sunset 4:26 PM
Moon
First Quarter • 65%
Moonrise 1:11 PM
Transit 6:58 PM
Moonset 1:37 AM

Best Times for Fishing or Hunting

Major Periods

6:07 AM - 8:37 AM
6:28 PM - 8:58 PM

Minor Periods

1:07 AM - 2:37 AM
12:41 PM - 2:11 PM
Action Rating:
Fair Action 2/5
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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