Water Temperature of Lake Mendota in Madison, WI

Current Water Temperature

53.4°F

Measurement Time: Thursday, April 30, 2026, 10:15 AM CDT

Temperature Locations

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Local Points of Interest

Maple Bluff, WI; Shorewood Hills, WI; Middleton, WI; Waunakee, WI

Lake Mendota

Station Name: Madison 2NW
Data Source: USGS

Elevation Above Sea Level: 847 feet

Nearest Address:
Howard Temin Lakeshore Path
Madison, WI 53706
Dane County

GPS Coordinates: 43.0994, -89.4044

Nearby Water Temperatures

Lake Monona, Madison, WI (2.5 mi)
Pheasant Branch, Middleton, WI (5.4 mi)
Swan Creek, Fitchburg, WI (7.2 mi)
Yahara River, Windsor, WI (8 mi)
Badger Mill Creek, Verona, WI (10.9 mi)
Brewery Creek, Cross Plains, WI (11.8 mi)
Black Earth Creek, Cross Plains, WI (11.9 mi)
Sugar River, Verona, WI (12.6 mi)
Black Earth Creek, Cross Plains, WI (13.1 mi)
Black Earth Creek, Black Earth, WI (16.7 mi)
Eagle Spring Lake, Mukwonago, WI (51.8 mi)
Wisconsin River, Muscoda, WI (52.8 mi)
Fox River, Berlin, WI (63.2 mi)
Fond Du Lac River, Fond Du Lac, WI (67.7 mi)
Rock River, Byron, IL (67.9 mi)

Weather for Madison, Wisconsin

Current Weather

34°F
Mist
Mist
28.7°F
37.6°F
96%
N 5.8 mph
12.1 mph
33.4°F
35.3°F
0 in
0%
9 mi
1016 mbar
0

Five Day Weather Forecast

Patchy rain nearby
Fri
H: 51°F
L: 36°F
Partly Cloudy
Sat
H: 52°F
L: 31°F
Patchy rain nearby
Sun
H: 60°F
L: 40°F
Patchy rain nearby
Mon
H: 70°F
L: 39°F
Sunny
Tue
H: 51°F
L: 33°F

Air Quality

AQI: 1 - Good
PM2.5: 3.25 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 152.85 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 12:54 AM
Sunset: 7:59 PM
Daylight: 14 hrs 8 mins
Moonrise: 8:29 PM
Moon Transit: 12:26 AM
Moonset: 5:23 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:24 AM - 2:54 PM

Minor Periods

7:59 PM - 9:29 PM
4:53 AM - 6:23 AM

Action Rating: 4 out of 5

Frost Advisory issued April 30 at 6:46PM CDT until May 1 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 30, 2026, 6:46 PM
Expires: Fri May 1, 2026, 3:00 AM

* WHAT...Temperatures as low as 30 will result in frost formation. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From midnight tonight to 8 AM CDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Frost Advisory issued April 30 at 9:48PM CDT until May 1 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 30, 2026, 9:48 PM
Expires: Fri May 1, 2026, 6:00 AM

* WHAT...Temperatures as low as 32 to 34 will result in frost formation. * WHERE...Fond du Lac, Dane, Green, Iowa, Lafayette, Rock, Dodge, and Jefferson Counties. * WHEN...Until 8 AM CDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.


Freeze Warning issued April 30 at 6:46PM CDT until May 1 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 30, 2026, 6:46 PM
Expires: Fri May 1, 2026, 3:00 AM

* WHAT...Sub-freezing temperatures as low as 27 expected. * WHERE...Columbia, Green Lake, Marquette, and Sauk Counties. * WHEN...From midnight tonight to 8 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Freeze Warning issued April 30 at 9:48PM CDT until May 1 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 30, 2026, 9:48 PM
Expires: Fri May 1, 2026, 6:00 AM

* WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Columbia, Green Lake, Marquette, and Sauk Counties. * WHEN...Until 8 AM CDT Friday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.


Flood Warning issued April 30 at 3:59PM CDT until May 1 at 7:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 30, 2026, 3:59 PM
Expires: Fri May 1, 2026, 4:00 AM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Winnebago and Rock Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Fox River Lower Near New Munster affecting Kenosha and Lake Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Jefferson. * WHEN...Until tomorrow morning. * IMPACTS...At 10.0 feet, Water affects low lying areas of residential property in the City of Jefferson. Rock River Park and boat launch is affected near Hwy B in Johnson Creek. * ADDITIONAL DETAILS... - At 3:00 PM CDT Thursday the stage was 10.2 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Thursday was 10.4 feet. - Forecast...The river is expected to fall below flood stage just after midnight tonight and continue falling to 7.3 feet Thursday, May 07. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.3 feet on 04/05/2007. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued late tonight at 400 AM CDT.
Friday, May 1, 2026

Weather Forecast

Patchy rain nearby
51.1°F
36.2°F
42.9°F
69%
0.01 in
86%
0%
7.6 mph
5.7


Air Quality

AQI: 1 - Good
PM2.5: 6.84 μg/m3
PM10: 7.33 μg/m3
Carbon Monoxide: 153.13 μg/m3
Nitrogen Dioxide: 3.92 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 68.68 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 12:54 AM
Sunset: 7:59 PM
Daylight: 14 hrs 8 mins
Moonrise: 8:29 PM
Moon Transit: 12:26 AM
Moonset: 5:23 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:24 AM - 2:54 PM

Minor Periods

7:59 PM - 9:29 PM
4:53 AM - 6:23 AM

Action Rating: 4 out of 5

Saturday, May 2, 2026

Weather Forecast

Partly Cloudy
52.2°F
30.9°F
42.1°F
69%
0 in
0%
0%
7.6 mph
6.4


Air Quality

AQI: 1 - Good
PM2.5: 4.73 μg/m3
PM10: 5.9 μg/m3
Carbon Monoxide: 158.09 μg/m3
Nitrogen Dioxide: 4.91 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 67.44 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:54 AM
Sunset: 8:00 PM
Daylight: 14 hrs 11 mins
Moonrise: 9:34 PM
Moon Transit: 1:12 AM
Moonset: 5:49 AM
Moon Phase: Full
Moon Illumination: 98.4%

Best Times for Fishing or Hunting

Major Periods

12:42 AM - 3:12 AM
1:11 PM - 3:41 PM

Minor Periods

9:04 PM - 10:34 PM
5:19 AM - 6:49 AM

Action Rating: 3 out of 5

Sunday, May 3, 2026

Weather Forecast

Patchy rain nearby
59.8°F
39.5°F
49.9°F
74%
0.03 in
88%
0%
20.4 mph
3.7


Air Quality

AQI: 1 - Good
PM2.5: 5.56 μg/m3
PM10: 6.46 μg/m3
Carbon Monoxide: 161.17 μg/m3
Nitrogen Dioxide: 4.51 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 82.2 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 13 mins
Moonrise: 10:37 PM
Moon Transit: 2:00 AM
Moonset: 6:22 AM
Moon Phase: Full
Moon Illumination: 94.4%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
2:00 PM - 4:30 PM

Minor Periods

10:07 PM - 11:37 PM
5:52 AM - 7:22 AM

Action Rating: 4 out of 5

Monday, May 4, 2026

Weather Forecast

Patchy rain nearby
70.3°F
39.3°F
56.5°F
78%
0.04 in
75%
0%
16.6 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 6.01 μg/m3
PM10: 6.78 μg/m3
Carbon Monoxide: 168.26 μg/m3
Nitrogen Dioxide: 6.53 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 79.96 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 12:54 AM
Sunset: 8:03 PM
Daylight: 14 hrs 16 mins
Moonrise: 11:33 PM
Moon Transit: 2:50 AM
Moonset: 7:01 AM
Moon Phase: Waning Gibbous
Moon Illumination: 88.0%

Best Times for Fishing or Hunting

Major Periods

2:20 AM - 4:50 AM
2:50 PM - 5:20 PM

Minor Periods

12:00 AM - 12:00 AM
6:31 AM - 8:01 AM

Action Rating: 2 out of 5

Tuesday, May 5, 2026

Weather Forecast

Sunny
51.2°F
32.7°F
42.6°F
67%
0 in
0%
0%
12.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 2.98 μg/m3
PM10: 3.29 μg/m3
Carbon Monoxide: 147.04 μg/m3
Nitrogen Dioxide: 4.11 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 74.77 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 18 mins
Moonrise: 12:33 AM
Moon Transit: 3:41 AM
Moonset: 7:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 79.8%

Best Times for Fishing or Hunting

Major Periods

3:11 AM - 5:41 AM
3:42 PM - 6:12 PM

Minor Periods

7:19 AM - 8:49 AM
12:00 AM - 12:00 AM

Action Rating: 3 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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