Cast Gill

Finnegan Lake

Oconto County, Wisconsin · WBIC 420600

Official regulationsDNR lake map

The DNR lists this lake's watershed (Oconto River) 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

18 acres

Max depth

38 ft

DNR lake type

Complex, Warm, clear water color

Water clarity

8 ft

Moderate, measured Aug 2023

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

Finnegan 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 1974), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.

Water clarity

8 ft Secchi depthModerate

Last measured Aug 23, 2023. 21 readings on record, 2013 to 2023.

Typical summer clarity (June to September): 10 ft, clear, from 17 readings (2013 to 2023).

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 Finnegan Lake Deep Hole. Checked Oct 23, 2026.

Water temperature

A typical year Modeled estimate

  • Ice goes outabout Apr 4 (Mar 28 to Apr 13)
  • Surface reaches 48°Fabout Apr 19 (Apr 7 to Apr 24)
  • Surface reaches 64°Fabout May 13 (May 8 to May 22)
  • June surface74°F, usually 72 to 76°F
  • July surface80°F, usually 78 to 81°F
  • August surface76°F, usually 74 to 78°F

Forms a warm top layer around Apr 16, lasting about 216 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.

Stocking history

  • Walleyelast stocked 2025 (large fingerling); stocked in 3 years since 2010
  • Yellow Perchlast stocked 2025 (adult and yearling); stocked in 5 years since 2010
  • Black Crappielast stocked 2024 (adult, large fingerling and yearling); stocked in 4 years since 2010
  • Bluegilllast stocked 2024 (adult, large fingerling and yearling); stocked in 5 years since 2010
  • Largemouth Basslast stocked 2022 (large fingerling); stocked in 6 years since 2010
  • Fathead Minnowlast stocked 2019 (adult); stocked in 1 year since 2010
  • Northern Pikelast stocked 2011 (small fingerling); stocked in 2 years since 2010

Stocking shows what was added to the lake, not what is in it now.

Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.

Boat landings

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

Share this lake

More lakes in Oconto County

All Oconto 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
  • Stocking historyWisconsin DNR annual fish stocking summary, 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

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

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