Cast Gill

Woodman Lake

Grant County, Wisconsin · WBIC 1205000

Find official regulationsDNR lake map

The DNR lists this lake's watershed (City of Boscobel-Wisconsin River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS

Size

21 acres

Max depth

12 ft

DNR lake type

Complex, Warm, dark water color

Water clarity

1.9 ft

Low, measured Jun 2026

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

Woodman Lake Access1

Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1983), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.

Water clarity

1.9 ft Secchi depthLow

Last measured Jun 25, 2026. 3 readings on record, 2015 to 2026.

Only a few readings are on record.

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 Woodman Lake. Checked Oct 23, 2026.

Water temperature

Last measured Jun 25, 2026, too long ago to show as the current temperature.

A typical year Modeled estimate

  • Ice goes outabout Mar 31 (Mar 25 to Apr 7)
  • Surface reaches 48°Fabout Apr 7 (Mar 30 to Apr 16)
  • Surface reaches 64°Fabout Apr 24 (Apr 15 to May 1)
  • June surface78°F, usually 77 to 81°F
  • July surface83°F, usually 82 to 85°F
  • August surface80°F, usually 77 to 82°F

Forms a warm top layer around Apr 8, lasting about 206 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

Loading today's forecast…

Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.

Boat landings

Wisconsin DNR public boat access sites. Checked Oct 23, 2026.

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More lakes in Grant County

All Grant County lakes

Where this comes from

  • Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
  • OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
  • Boat landingsWisconsin DNR public boat access sites, 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

See data sources for what each source covers, and about for how the numbers are matched to lakes.

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