Water Temperature of Lake Mendota in Madison, WI

Current Water Temperature

41.5°F

Measurement Time: Thursday, April 9, 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

55.9°F
Partly cloudy
Partly cloudy
53.4°F
61.7°F
34%
W 9.8 mph
11.3 mph
61.3°F
34.7°F
0 in
75%
9 mi
1020 mbar
3.9

Five Day Weather Forecast

Moderate rain
Thu
H: 64°F
L: 43°F
Moderate rain
Fri
H: 52°F
L: 39°F
Moderate rain
Sat
H: 50°F
L: 33°F
Patchy rain nearby
Sun
H: 69°F
L: 47°F
Patchy rain nearby
Mon
H: 73°F
L: 62°F

Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 5.05 μg/m3
Carbon Monoxide: 275.85 μg/m3
Nitrogen Dioxide: 9.75 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 64 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:00 PM
Sunset: 7:33 PM
Daylight: 13 hrs 7 mins
Moonrise: 2:29 AM
Moon Transit: 6:39 AM
Moonset: 10:54 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:09 AM - 8:39 AM
6:39 PM - 9:09 PM

Minor Periods

10:24 AM - 11:54 AM
1:59 AM - 3:29 AM

Action Rating: 3 out of 5

Flood Warning issued April 9 at 4:50AM CDT until April 11 at 3:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 9, 2026, 4:50 AM
Expires: Thu April 9, 2026, 5:00 PM

...The Flood Warning continues for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. Baraboo River At Rock Springs affecting Sauk County. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. ...The Flood Warning is cancelled for the following rivers in Wisconsin...Illinois... Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Baraboo River near Baraboo. * WHEN...Until Saturday afternoon. * IMPACTS...At 18.0 feet, If Wisconsin River at Portage up to 17 feet also, water approaches gravel of I-39 off ramp to Cascade Mt Rd. There is widespread flooding of agricultural land. * ADDITIONAL DETAILS... - At 4:00 AM CDT Thursday the stage was 16.6 feet. - Bankfull stage is 14.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 4:00 AM CDT Thursday was 16.9 feet. - Forecast...The river is expected to rise to a crest of 17.6 feet just after midnight tonight. It will then fall below flood stage late Saturday morning. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 17.6 feet on 02/27/1985. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this morning at 600 AM CDT.


Flood Warning issued April 9 at 10:34AM CDT until April 11 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 9, 2026, 10:34 AM
Expires: Thu April 9, 2026, 10:45 PM

...The Flood Warning is extended for the following rivers in Wisconsin... Baraboo River Near Baraboo affecting Columbia and Sauk Counties. ...The Flood Warning is cancelled for the following rivers in Wisconsin... Baraboo River At Rock Springs affecting Sauk County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Baraboo River near Baraboo. * WHEN...Until Saturday evening. * IMPACTS...At 17.0 feet, If Wisconsin River at Portage up to 17 feet also, water impacts parking lots near Hwy 33 and water over Tritz Rd near Hwy 33. There is widespread flooding of agricultural land. * ADDITIONAL DETAILS... - At 8:00 AM CDT Thursday the stage was 16.7 feet. - Bankfull stage is 14.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:00 AM CDT Thursday was 16.9 feet. - Forecast...The river is expected to rise to a crest of 16.9 feet tomorrow morning. It will then fall below flood stage early Saturday afternoon. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 17.0 feet on 03/22/1975. - 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 morning at 1145 AM CDT.


Flood Warning issued April 9 at 4:50AM CDT until April 9 at 1:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Thu April 9, 2026, 4:50 AM
Expires: Thu April 9, 2026, 1:00 PM

...The Flood Warning continues for the following rivers in Wisconsin... Wisconsin River At Portage affecting Columbia County. Baraboo River At Rock Springs affecting Sauk County. Baraboo River Near Baraboo affecting Columbia and Sauk Counties. ...The Flood Warning is cancelled for the following rivers in Wisconsin...Illinois... Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is forecast. * WHERE...Baraboo River at Rock Springs. * WHEN...Until this afternoon. * IMPACTS...At 19.0 feet, The river is well out of its banks and floodwaters affect a low spot on Highway DD in Rock Springs. Farm fields are flooded in the Loganville area. * ADDITIONAL DETAILS... - At 4:00 AM CDT Thursday the stage was 17.7 feet. - Bankfull stage is 13.5 feet. - Forecast...The river is expected to rise to a crest of 18.5 feet this morning. - Flood stage is 18.5 feet. - Flood History...This crest compares to a previous crest of 18.2 feet on 03/06/2004. - http://www.weather.gov/safety/flood

Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Additional information is available at www.weather.gov. The next statement will be issued this morning at 600 AM CDT.


Thursday, April 9, 2026

Weather Forecast

Moderate rain
64.2°F
42.6°F
51.8°F
62%
0.24 in
89%
0%
17.2 mph
1.4


Air Quality

AQI: 1 - Good
PM2.5: 5.59 μg/m3
PM10: 5.83 μg/m3
Carbon Monoxide: 185.05 μg/m3
Nitrogen Dioxide: 3.67 μg/m3
Sulphur Dioxide: 1.53 μg/m3
Ozone: 86.36 μg/m3

Astronomical

Sunrise: 6:26 AM
Sun Transit: 1:00 PM
Sunset: 7:33 PM
Daylight: 13 hrs 7 mins
Moonrise: 2:29 AM
Moon Transit: 6:39 AM
Moonset: 10:54 AM
Moon Phase: Last Quarter
Moon Illumination: 41.9%

Best Times for Fishing or Hunting

Major Periods

6:09 AM - 8:39 AM
6:39 PM - 9:09 PM

Minor Periods

10:24 AM - 11:54 AM
1:59 AM - 3:29 AM

Action Rating: 3 out of 5

Friday, April 10, 2026

Weather Forecast

Moderate rain
51.8°F
39.1°F
45.5°F
82%
0.76 in
81%
0%
10.1 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 5.53 μg/m3
PM10: 6.07 μg/m3
Carbon Monoxide: 210.17 μg/m3
Nitrogen Dioxide: 8.61 μg/m3
Sulphur Dioxide: 2.07 μg/m3
Ozone: 64.28 μg/m3

Astronomical

Sunrise: 6:24 AM
Sun Transit: 12:58 AM
Sunset: 7:34 PM
Daylight: 13 hrs 10 mins
Moonrise: 3:07 AM
Moon Transit: 7:29 AM
Moonset: 11:58 AM
Moon Phase: Last Quarter
Moon Illumination: 31.0%

Best Times for Fishing or Hunting

Major Periods

6:59 AM - 9:29 AM
7:30 PM - 10:00 PM

Minor Periods

11:28 AM - 12:58 AM
2:37 AM - 4:07 AM

Action Rating: 3 out of 5

Saturday, April 11, 2026

Weather Forecast

Moderate rain
49.8°F
32.9°F
42.7°F
82%
0.61 in
79%
0%
12.3 mph
1.1


Air Quality

AQI: 1 - Good
PM2.5: 7.94 μg/m3
PM10: 8.29 μg/m3
Carbon Monoxide: 212.65 μg/m3
Nitrogen Dioxide: 10.22 μg/m3
Sulphur Dioxide: 2.49 μg/m3
Ozone: 70.84 μg/m3

Astronomical

Sunrise: 6:22 AM
Sun Transit: 12:58 AM
Sunset: 7:36 PM
Daylight: 13 hrs 13 mins
Moonrise: 3:39 AM
Moon Transit: 8:18 AM
Moonset: 1:06 PM
Moon Phase: Last Quarter
Moon Illumination: 21.1%

Best Times for Fishing or Hunting

Major Periods

7:48 AM - 10:18 AM
8:17 PM - 10:47 PM

Minor Periods

12:36 AM - 2:06 PM
3:09 AM - 4:39 AM

Action Rating: 2 out of 5

Sunday, April 12, 2026

Weather Forecast

Patchy rain nearby
69.4°F
46.8°F
58.1°F
90%
0.1 in
79%
0%
23.5 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 8.15 μg/m3
PM10: 8.37 μg/m3
Carbon Monoxide: 192.26 μg/m3
Nitrogen Dioxide: 6.1 μg/m3
Sulphur Dioxide: 3.24 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 6:21 AM
Sun Transit: 12:58 AM
Sunset: 7:37 PM
Daylight: 13 hrs 16 mins
Moonrise: 4:05 AM
Moon Transit: 9:05 AM
Moonset: 2:15 PM
Moon Phase: Waning Crescent
Moon Illumination: 12.6%

Best Times for Fishing or Hunting

Major Periods

8:35 AM - 11:05 AM
9:03 PM - 11:33 PM

Minor Periods

1:45 PM - 3:15 PM
3:35 AM - 5:05 AM

Action Rating: 2 out of 5

Monday, April 13, 2026

Weather Forecast

Patchy rain nearby
72.5°F
61.9°F
66.6°F
86%
0.02 in
86%
0%
21.3 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 3.47 μg/m3
PM10: 3.53 μg/m3
Carbon Monoxide: 152.37 μg/m3
Nitrogen Dioxide: 3.49 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 73.62 μg/m3

Astronomical

Sunrise: 6:19 AM
Sun Transit: 12:58 AM
Sunset: 7:38 PM
Daylight: 13 hrs 19 mins
Moonrise: 4:29 AM
Moon Transit: 9:51 AM
Moonset: 3:25 PM
Moon Phase: Waning Crescent
Moon Illumination: 6.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:21 AM - 11:51 AM

Minor Periods

2:55 PM - 4:25 PM
3:59 AM - 5:29 AM

Action Rating: 2 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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