Cast Gill

Gilbert Lake

Washington County, Wisconsin · WBIC 25600

Official regulationsDNR lake mapDepth map (PDF)

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

This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations

Size

44 acres

Max depth

30 ft

DNR lake type

Simple, Warm, dark water color

Water clarity

7.5 ft

Moderate, measured Sep 2001

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

7.5 ft Secchi depthModerateOlder reading

Last measured Sep 2, 2001. 4 readings on record, 1999 to 2001.

Only a few readings are on record.

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 GILBERT LAKE - GILBERT LAKE. Checked Oct 23, 2026.

Water temperature

A typical year Modeled estimate

  • Ice goes outabout Apr 7 (Apr 1 to Apr 13)
  • Surface reaches 48°Fabout Apr 20 (Apr 11 to Apr 26)
  • Surface reaches 64°Fabout May 9 (May 3 to May 13)
  • June surface74°F, usually 73 to 75°F
  • July surface80°F, usually 78 to 82°F
  • August surface76°F, usually 74 to 78°F

Forms a warm top layer around Apr 19, lasting about 176 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

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

  • Gilbert Lake Carry-in (listed under Waushara County)Carry-in access · Unimproved surface · Township

Some landings are matched to this lake by name only, because the DNR list gives no location for them. They have no pin.

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

Share this lake

More lakes in Washington County

All Washington 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
  • Regulations linkWisconsin DNR fishing regulations (linked, not restated), 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
  • 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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