Water Temperature of Lake Mendota in Madison, WI
Current Water Temperature
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, WIStation 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

Five Day Weather Forecast

Fri
H: 51°F
L: 36°F

Sat
H: 52°F
L: 31°F

Sun
H: 60°F
L: 40°F

Mon
H: 70°F
L: 39°F

Tue
H: 51°F
L: 33°F
Air Quality
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 80 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 7:59 PM
Daylight: 14 hrs 8 mins
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 AM12:24 AM - 2:54 PM
Minor Periods
7:59 PM - 9:29 PM4:53 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.
Weather Forecast
Air Quality
Nitrogen Dioxide: 3.92 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 68.68 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 7:59 PM
Daylight: 14 hrs 8 mins
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 AM12:24 AM - 2:54 PM
Minor Periods
7:59 PM - 9:29 PM4:53 AM - 6:23 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.91 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 67.44 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:00 PM
Daylight: 14 hrs 11 mins
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 AM1:11 PM - 3:41 PM
Minor Periods
9:04 PM - 10:34 PM5:19 AM - 6:49 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.51 μg/m3
Sulphur Dioxide: 1.3 μg/m3
Ozone: 82.2 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:01 PM
Daylight: 14 hrs 13 mins
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 AM2:00 PM - 4:30 PM
Minor Periods
10:07 PM - 11:37 PM5:52 AM - 7:22 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 6.53 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 79.96 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:03 PM
Daylight: 14 hrs 16 mins
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 AM2:50 PM - 5:20 PM
Minor Periods
12:00 AM - 12:00 AM6:31 AM - 8:01 AM
Action Rating: 2 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 4.11 μg/m3
Sulphur Dioxide: 1.65 μg/m3
Ozone: 74.77 μg/m3
Astronomical
Sun Transit: 12:54 AM
Sunset: 8:04 PM
Daylight: 14 hrs 18 mins
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 AM3:42 PM - 6:12 PM
Minor Periods
7:19 AM - 8:49 AM12:00 AM - 12:00 AM
Action Rating: 3 out of 5
