Forest Lake
Fond du Lac County, Wisconsin · WBIC 8900
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
51 acres
Max depth
32 ft
DNR lake type
Complex, Warm, clear water color
Water clarity
11 ft
Clear, measured Aug 2025
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
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
11 ft Secchi depthClear
Last measured Aug 24, 2025. 335 readings on record, 1986 to 2025.
Typical summer clarity (June to September): 13 ft, clear, from 36 readings (2012 to 2025).
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 Forest Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
Last measured Aug 24, 2025, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 8 (Apr 1 to Apr 14)
- Surface reaches 48°Fabout Apr 21 (Apr 13 to Apr 26)
- Surface reaches 64°Fabout May 13 (May 8 to May 24)
- June surface72°F, usually 72 to 74°F
- July surface79°F, usually 77 to 81°F
- August surface75°F, usually 73 to 77°F
Forms a warm top layer around Apr 23, lasting about 169 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.
Stocking history
- Black Crappielast stocked 2019 (adult and large fingerling); stocked in 2 years since 2010
- Largemouth Basslast stocked 2019 (large fingerling); stocked in 2 years since 2010
- Yellow Perchlast stocked 2019 (adult and yearling); stocked in 2 years since 2010
- Northern Pikelast stocked 2018 (large 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
- 1Forest Lake Canoe LaunchCarry-in access · Unimproved surface · State(dnr)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Fond du Lac County
- Mauthe Lake0.8 miles away
- Crooked Lake1.2 miles away
- Spring Lake1.9 miles away
- Auburn Lake2.1 miles away
- Buttermilk Lake2.2 miles away
- Butzke Lake2.8 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
- 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
- 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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