Tombeau Lake
Walworth County, Wisconsin · WBIC 743800
Size
35 acres
Max depth
26 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
10 ft
Clear, measured Jun 2010
A warm-water lake type: the DNR groups it with lakes that warm up through summer. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1971), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
10 ft Secchi depthClearOlder reading
Last measured Jun 6, 2010. 144 readings on record, 1989 to 2010.
Nothing has been measured in the last 5 years, so this may not match the lake today.
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 TOMBEAU LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Mar 31 (Mar 21 to Apr 11)
- Surface reaches 48°Fabout Apr 10 (Apr 1 to Apr 19)
- Surface reaches 64°Fabout May 2 (Apr 19 to May 8)
- June surface76°F, usually 75 to 77°F
- July surface82°F, usually 79 to 83°F
- August surface78°F, usually 75 to 80°F
Forms a warm top layer around Apr 17, lasting about 171 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.
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 Walworth County
- Benedict Lake0.4 miles away
- Powers Lake1.1 miles away
- Pell Lake2.6 miles away
- Lake Ivanhoe4.1 miles away
- Geneva Lake10 miles away
- Como Lake10 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
- 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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