Water Temperature of Lake Mendota in Madison, WI

Current Water Temperature

52.5°F

Measurement Time: Friday, May 1, 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

46.9°F
Partly cloudy
Partly cloudy
42.9°F
47.9°F
48%
NNW 8.3 mph
11.1 mph
43.6°F
24.2°F
0 in
75%
9 mi
1017 mbar
0.7

Five Day Weather Forecast

Partly Cloudy
Fri
H: 50°F
L: 37°F
Patchy rain nearby
Sat
H: 53°F
L: 31°F
Patchy rain nearby
Sun
H: 63°F
L: 42°F
Patchy rain nearby
Mon
H: 68°F
L: 41°F
Partly Cloudy
Tue
H: 55°F
L: 39°F

Air Quality

AQI: 1 - Good
PM2.5: 4.05 μg/m3
PM10: 4.45 μg/m3
Carbon Monoxide: 166.85 μg/m3
Nitrogen Dioxide: 6.05 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 60 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

Freeze Warning issued May 1 at 7:58AM CDT until May 2 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 7:58 AM
Expires: Fri May 1, 2026, 4:00 PM

* WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Fond du Lac, Dane, Green, Iowa, Lafayette, Rock, Dodge, and Jefferson Counties. * WHEN...From midnight tonight to 8 AM CDT Saturday. * 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 May 1 at 7:58AM CDT until May 2 at 8:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 7:58 AM
Expires: Fri May 1, 2026, 4:00 PM

* WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Columbia, Green Lake, Marquette, and Sauk Counties. * WHEN...From midnight tonight to 8 AM CDT Saturday. * 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 May 1 at 4:21AM CDT until May 5 at 1:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 4:21 AM
Expires: Fri May 1, 2026, 4:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until early Tuesday morning. * IMPACTS...At 11.0 feet, In the Town of Lake Koshkonong, floodwaters affect Vets Lane, Blackhawk Island Road, and Oxbow Bend Road. There is widespread flooding of roads and docks in the Town of Koshkonong and Town of Sumner including Vets Lane, Blackhawk Island Road and Oxbow Bend Road. * ADDITIONAL DETAILS... - At 4:00 AM CDT Friday the stage was 10.8 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Friday was 10.9 feet. - Forecast...The river is expected to fall below flood stage Monday evening and continue falling to 9.4 feet Thursday evening. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.6 feet on 04/07/2007. - 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 this afternoon at 100 PM CDT.


Flood Warning issued May 1 at 4:21AM CDT until May 3 at 1:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 4:21 AM
Expires: Fri May 1, 2026, 4:30 PM

...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Rock River At Newville affecting Rock County. Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. Rock River At Jefferson affecting Jefferson County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until early Sunday morning. * IMPACTS...At 16.5 feet, In the Fort Atkinson area, the following roads are impacted: Sinnissippi Drive, Bark River Road from Kutz Road to Rock River Road, and Rock River Road from Highway 106 to the Fort Atkinson city limits. Water is in park land near the river in Fort Atkinson. * ADDITIONAL DETAILS... - At 4:00 AM CDT Friday the stage was 16.4 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Friday was 16.5 feet. - Forecast...The river is expected to rise to a crest of 16.4 feet this morning. It will then fall below flood stage tomorrow evening. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.4 feet on 03/18/2009. - 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 this afternoon at 100 PM CDT.


Flood Warning issued May 1 at 11:09AM CDT until May 3 at 7:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Fri May 1, 2026, 11:09 AM
Expires: Fri May 1, 2026, 11:15 PM

...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Rock and Jefferson Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Afton affecting Rock and Winnebago Counties. ...The Flood Warning continues for the following rivers in Wisconsin... Rock River At Newville affecting Rock County. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. ...The Flood Warning is cancelled for the following river in Wisconsin... Rock River At Jefferson affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until Sunday morning. * IMPACTS...At 16.5 feet, In the Fort Atkinson area, the following roads are impacted: Sinnissippi Drive, Bark River Road from Kutz Road to Rock River Road, and Rock River Road from Highway 106 to the Fort Atkinson city limits. Water is in park land near the river in Fort Atkinson. * ADDITIONAL DETAILS... - At 10:00 AM CDT Friday the stage was 16.3 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 10:00 AM CDT Friday was 16.5 feet. - Forecast...The river is expected to fall below flood stage early Sunday morning and continue falling to 14.6 feet Friday, May 08. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 16.2 feet on 04/06/2007. - 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 this afternoon at 1215 PM CDT.
Friday, May 1, 2026

Weather Forecast

Partly Cloudy
50.2°F
37.2°F
43.4°F
66%
0 in
0%
0%
9.2 mph
5.2


Air Quality

AQI: 1 - Good
PM2.5: 5.49 μg/m3
PM10: 5.85 μg/m3
Carbon Monoxide: 153.13 μg/m3
Nitrogen Dioxide: 4.01 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 68.44 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

Patchy rain nearby
52.9°F
30.5°F
43.8°F
68%
0.01 in
88%
0%
9.8 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 4.24 μg/m3
PM10: 5.33 μg/m3
Carbon Monoxide: 158.09 μg/m3
Nitrogen Dioxide: 4.28 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 69.36 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
63.1°F
41.5°F
50.8°F
75%
0.1 in
83%
0%
16.8 mph
4.5


Air Quality

AQI: 1 - Good
PM2.5: 5.34 μg/m3
PM10: 6.22 μg/m3
Carbon Monoxide: 161.17 μg/m3
Nitrogen Dioxide: 4.17 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 83.04 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
67.6°F
41.4°F
53°F
75%
0.18 in
86%
0%
19.9 mph
6.1


Air Quality

AQI: 1 - Good
PM2.5: 5.79 μg/m3
PM10: 6.55 μg/m3
Carbon Monoxide: 168.24 μg/m3
Nitrogen Dioxide: 6.17 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 79.76 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

Partly Cloudy
55°F
39.4°F
47.4°F
61%
0 in
0%
0%
10.7 mph
5.4


Air Quality

AQI: 1 - Good
PM2.5: 2.97 μg/m3
PM10: 3.29 μg/m3
Carbon Monoxide: 146.67 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 74.08 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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