Water Temperature of Lake Mendota in Madison, WI

Current Water Temperature

51.8°F

Measurement Time: Sunday, April 26, 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

51.1°F
Clear
Clear
46.6°F
52°F
83%
SE 12.8 mph
20.3 mph
48°F
47.9°F
0 in
0%
9 mi
1010 mbar
0

Five Day Weather Forecast

Moderate rain
Mon
H: 67°F
L: 51°F
Patchy rain nearby
Tue
H: 58°F
L: 45°F
Patchy rain nearby
Wed
H: 56°F
L: 42°F
Patchy rain nearby
Thu
H: 59°F
L: 36°F
Patchy rain nearby
Fri
H: 49°F
L: 32°F

Air Quality

AQI: 1 - Good
PM2.5: 10.15 μg/m3
PM10: 10.25 μg/m3
Carbon Monoxide: 236.85 μg/m3
Nitrogen Dioxide: 9.15 μg/m3
Sulphur Dioxide: 6.05 μg/m3
Ozone: 73 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:55 AM
Sunset: 7:54 PM
Daylight: 13 hrs 58 mins
Moonrise: 4:05 PM
Moon Transit: 10:19 PM
Moonset: 4:03 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

9:33 AM - 12:03 AM
12:00 AM - 12:00 AM

Minor Periods

3:35 PM - 5:05 PM
3:33 AM - 5:03 AM

Action Rating: 2 out of 5

Flood Warning issued April 26 at 3:49PM CDT until April 27 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 3:49 PM
Expires: Mon April 27, 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 Jefferson and Rock 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Crawfish River at Milford. * WHEN...Until tomorrow evening. * IMPACTS...At 7.0 feet, There is widespread flooding of lowland and agricultural land. There is widespread flooding of roads in Riverbend Campground about 5 miles upstream of Milford. * ADDITIONAL DETAILS... - At 3:00 PM CDT Sunday the stage was 7.2 feet. - Bankfull stage is 5.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Sunday was 7.5 feet. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 4.6 feet Sunday, May 03. - Flood stage is 7.0 feet. - Flood History...This crest compares to a previous crest of 7.2 feet on 03/09/1937. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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.


Flood Warning issued April 26 at 3:49PM CDT until April 29 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 3:49 PM
Expires: Mon April 27, 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 Jefferson and Rock 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Jefferson. * WHEN...Until Wednesday evening. * IMPACTS...At 11.0 feet, Floodwaters affect low lying areas of residential and business property in Jefferson. Water approaches the intersection of Highway 26 (Main St) and County Road N (E Dane St). S Center Ave near the river flooded and Riverview Drive near the wastewater plant flooded. Park is flooded. The retention pond at S Main St and E Dane St is full. * ADDITIONAL DETAILS... - At 3:00 PM CDT Sunday the stage was 10.9 feet. - Bankfull stage is 8.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Sunday was 11.1 feet. - Forecast...The river is expected to fall below flood stage early Wednesday afternoon and continue falling to 8.3 feet Sunday, May 03. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 10.9 feet on 03/27/2009. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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.


Flood Warning issued April 26 at 3:49PM CDT until May 1 at 7:00AM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 3:49 PM
Expires: Mon April 27, 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 Jefferson and Rock 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Moderate flooding is occurring and minor flooding is forecast. * WHERE...Rock River at Fort Atkinson. * WHEN...Until Friday morning. * IMPACTS...At 17.0 feet, Floodwaters are in the back yards of some homes on Rogers Street on the northeast side of Fort Atkinson and water surrounds a few homes and businesses at the end of Vets Lane near the intersection of Hwy 106 and Blackhawk Island Rd. These roads are flooded in the Fort Atkinson area: Sinissippi Drive, Vets Ln, Fox Hill Rd, Bark River Road from Kutz Road to Rock River Road, Rock River Rd from Milwaukee Ave E to Hwy 106, North Shore Rd, Ralph Rd. The river walkway in Fort Atkinson becomes flooded. * ADDITIONAL DETAILS... - At 3:00 PM CDT Sunday the stage was 17.0 feet. - Bankfull stage is 14.5 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Sunday was 17.2 feet. - Forecast...The river is expected to fall below flood stage early Friday morning and continue falling to 15.2 feet Sunday, May 03. - Flood stage is 16.0 feet. - Flood History...This crest compares to a previous crest of 17.0 feet on 09/07/2018. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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.


Flood Warning issued April 26 at 3:49PM CDT until May 2 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 3:49 PM
Expires: Mon April 27, 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 Jefferson and Rock 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 Near Berlin affecting Green Lake County. Crawfish River At Milford affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Rock River near Lake Koshkonong. * WHEN...Until Saturday evening. * IMPACTS...At 11.3 feet, There is knee-deep water over Blackhawk Island Road. Lamp Road on west side of river also becomes flooded. Lake Koshkonong merges with Mud Lake to the east of Lake Koshkonong. * ADDITIONAL DETAILS... - At 3:00 PM CDT Sunday the stage was 11.3 feet. - Bankfull stage is 9.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 3:00 PM CDT Sunday was 11.4 feet. - Forecast...The river is expected to fall below flood stage early Saturday afternoon and continue falling to 9.8 feet Sunday, May 03. - Flood stage is 10.0 feet. - Flood History...This crest compares to a previous crest of 11.2 feet on 07/31/2010. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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.


Flood Warning issued April 26 at 9:27PM CDT until April 27 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Effective: Sun April 26, 2026, 9:27 PM
Expires: Mon April 27, 2026, 9:30 AM

...The Flood Warning is extended for the following rivers in Wisconsin...Illinois... Rock River Near Lake Koshkonong affecting Jefferson and Rock Counties. Rock River At Fort Atkinson affecting Jefferson County. Rock River At Jefferson affecting Jefferson County. Fox River Lower Near New Munster affecting Lake and Kenosha Counties. ...The Flood Warning continues for the following rivers in Wisconsin...Illinois... Fox River Near Berlin affecting Green Lake County. Rock River At Newville affecting Rock County. Rock River At Afton affecting Winnebago and Rock Counties. ROCK RIVER near LEBANON-3 E-HWY MM BRIDGE affecting Dodge County. Crawfish River At Milford affecting Jefferson County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Crawfish River at Milford. * WHEN...Until tomorrow evening. * IMPACTS...At 7.0 feet, There is widespread flooding of lowland and agricultural land. There is widespread flooding of roads in Riverbend Campground about 5 miles upstream of Milford. * ADDITIONAL DETAILS... - At 9:00 PM CDT Sunday the stage was 7.2 feet. - Bankfull stage is 5.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:00 PM CDT Sunday was 7.4 feet. - Forecast...The river is expected to fall below flood stage tomorrow morning and continue falling to 4.8 feet Sunday, May 03. - Flood stage is 7.0 feet. - Flood History...This crest compares to a previous crest of 7.1 feet on 03/17/1990. - http://www.weather.gov/safety/flood

Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. 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 Monday morning at 930 AM CDT.


Monday, April 27, 2026

Weather Forecast

Moderate rain
66.9°F
50.9°F
58°F
86%
0.72 in
92%
0%
20.8 mph
3.2


Air Quality

AQI: 1 - Good
PM2.5: 11.51 μg/m3
PM10: 11.79 μg/m3
Carbon Monoxide: 207.65 μg/m3
Nitrogen Dioxide: 7.94 μg/m3
Sulphur Dioxide: 4.82 μg/m3
Ozone: 84.16 μg/m3

Astronomical

Sunrise: 5:57 AM
Sun Transit: 12:55 AM
Sunset: 7:54 PM
Daylight: 13 hrs 58 mins
Moonrise: 4:05 PM
Moon Transit: 10:19 PM
Moonset: 4:03 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 81.8%

Best Times for Fishing or Hunting

Major Periods

9:33 AM - 12:03 AM
12:00 AM - 12:00 AM

Minor Periods

3:35 PM - 5:05 PM
3:33 AM - 5:03 AM

Action Rating: 2 out of 5

Tuesday, April 28, 2026

Weather Forecast

Patchy rain nearby
57.9°F
45°F
51.6°F
77%
0.01 in
84%
0%
18.8 mph
6.2


Air Quality

AQI: 1 - Good
PM2.5: 3.13 μg/m3
PM10: 3.3 μg/m3
Carbon Monoxide: 170.57 μg/m3
Nitrogen Dioxide: 3.36 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 84 μg/m3

Astronomical

Sunrise: 5:55 AM
Sun Transit: 12:55 AM
Sunset: 7:56 PM
Daylight: 14 hrs mins
Moonrise: 5:11 PM
Moon Transit: 11:01 PM
Moonset: 4:22 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 89.6%

Best Times for Fishing or Hunting

Major Periods

10:15 AM - 12:45 AM
12:00 AM - 12:00 AM

Minor Periods

4:41 PM - 6:11 PM
3:52 AM - 5:22 AM

Action Rating: 2 out of 5

Wednesday, April 29, 2026

Weather Forecast

Patchy rain nearby
56.2°F
41.9°F
48.4°F
66%
0.01 in
76%
0%
15 mph
4.7


Air Quality

AQI: 1 - Good
PM2.5: 3.45 μg/m3
PM10: 3.78 μg/m3
Carbon Monoxide: 162.33 μg/m3
Nitrogen Dioxide: 3.92 μg/m3
Sulphur Dioxide: 1.68 μg/m3
Ozone: 76.8 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 12:54 AM
Sunset: 7:57 PM
Daylight: 14 hrs 3 mins
Moonrise: 6:17 PM
Moon Transit: 11:43 PM
Moonset: 4:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 95.5%

Best Times for Fishing or Hunting

Major Periods

10:57 AM - 1:27 PM
12:00 AM - 12:00 AM

Minor Periods

5:47 PM - 7:17 PM
4:11 AM - 5:41 AM

Action Rating: 3 out of 5

Thursday, April 30, 2026

Weather Forecast

Patchy rain nearby
58.7°F
36.3°F
47.3°F
71%
0.03 in
83%
0%
8.3 mph
4.4


Air Quality

AQI: 1 - Good
PM2.5: 3.98 μg/m3
PM10: 4.17 μg/m3
Carbon Monoxide: 163.16 μg/m3
Nitrogen Dioxide: 5.72 μg/m3
Sulphur Dioxide: 1.61 μg/m3
Ozone: 67.84 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:54 AM
Sunset: 7:58 PM
Daylight: 14 hrs 5 mins
Moonrise: 7:22 PM
Moon Transit: 12:00 AM
Moonset: 5:01 AM
Moon Phase: Full
Moon Illumination: 99.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
11:39 AM - 2:09 PM

Minor Periods

6:52 PM - 8:22 PM
4:31 AM - 6:01 AM

Action Rating: 5 out of 5

Friday, May 1, 2026

Weather Forecast

Patchy rain nearby
49.4°F
32°F
41.3°F
83%
0.06 in
83%
0%
14.1 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 3.01 μg/m3
PM10: 3.69 μg/m3
Carbon Monoxide: 151.68 μg/m3
Nitrogen Dioxide: 3.9 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 67.46 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

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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