Crooked Lake
Waukesha County, Wisconsin · WBIC 826800
Size
58 acres
Max depth
16 ft
DNR lake type
Simple, Riverine
Water clarity
9 ft
Moderate, measured Aug 2026
A river-like water type, with flow instead of a still basin. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1976), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
9 ft Secchi depthModerate
Last measured Aug 30, 2026. 242 readings on record, 1988 to 2026.
Typical summer clarity (June to September): 8 ft, moderate, from 100 readings (2012 to 2026).
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station CROOKED LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
75.9°F surface, measured Aug 30, 2026
Measured near the surface (0.3 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 8 (Mar 28 to Apr 12)
- Surface reaches 48°Fabout Apr 14 (Apr 7 to Apr 22)
- Surface reaches 64°Fabout May 4 (Apr 21 to May 12)
- June surface76°F, usually 75 to 77°F
- July surface82°F, usually 79 to 84°F
- August surface77°F, usually 74 to 79°F
Forms a warm top layer around May 19, lasting about 89 days.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
More lakes in Waukesha County
- Bowron Lake0.5 miles away
- Upper Genesee Lake0.6 miles away
- Duck Lake0.6 miles away
- Lower Nemahbin Lake1.2 miles away
- Middle Genesee Lake1.2 miles away
- Upper Nemahbin Lake1.5 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Measured temperatureWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Depth map linkWisconsin DNR lake maps list, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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