Lilly Lake
Brown County, Wisconsin · WBIC 82900
The DNR lists this lake's watershed (West Twin 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
40 acres
Max depth
21 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
6.5 ft
Moderate, measured Aug 1994
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 1978), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
6.5 ft Secchi depthModerateOlder reading
Last measured Aug 25, 1994. 3 readings on record, 1994.
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 LILLY LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Mar 30 (Mar 25 to Apr 9)
- Surface reaches 48°Fabout Apr 15 (Apr 5 to Apr 21)
- Surface reaches 64°Fabout May 11 (May 8 to May 17)
- June surface74°F, usually 72 to 75°F
- July surface80°F, usually 78 to 81°F
- August surface76°F, usually 74 to 78°F
Forms a warm top layer around Apr 28, lasting about 127 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.
Stocking history
- Largemouth Basslast stocked 2021 (large fingerling); stocked in 8 years since 2010
- Northern Pikelast stocked 2021 (large fingerling and small fingerling); stocked in 6 years since 2010
- Bluegilllast stocked 2019 (large fingerling); stocked in 3 years since 2010
- Yellow Perchlast stocked 2017 (small fingerling); stocked in 1 year 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
- 1Lily Lake Park Boat RampBoat ramp · Grate surface · Accessible features · County
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Brown County
- Bay Beach Lagoons9.3 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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