Lily Lake is a lake in Brown County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.

What is the water temperature of Lily Lake?

Lily Lake typically sits around 72°F at the surface in August, from 8 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.

How deep is Lily Lake?

Lily Lake has a maximum depth of 19 feet. The lake covers 42 acres.

What fish are in Lily Lake?

Fish species found in Lily Lake include Panfish, Largemouth Bass, Northern Pike. Lily Lake is located in Brown County, Wisconsin.

Are there boat ramps on Lily Lake?

Lily Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lily Lake Park. Public access is listed as yes.

Can I fish at Lily Lake?

Lily Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.

Lily Lake

Brown County, Wisconsin42 acresView map Directions

Wisconsin DNR publishes the water-quality measurements for Lily Lake. Here is what has been measured.

Clarity

9.6 ft

Typical for Wisconsin

Secchi · sampled 2025

Water temp

~72°F

Typical for Aug · EPA WQP

Max depth

19 ft

Bathymetric survey

Area

42 acres

Surface area

2 aquatic invasives
19 ft max depth
Public access
Limited data

See the measurements Directions Where to stay

Lily Lake in Brown County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9.6 ft visibility. Maximum depth: 19 ft. Surface area: 42 acres.

Wisconsin DNR rates Largemouth Bass as abundant on Lily Lake. DNR survey details →

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Lily Lake is a 42-acre lake in Brown County, Wisconsin with a maximum depth of 19 feet. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike. Public access is available with 1 public boat landing.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-08-30. Methodology: how these readings are compared.

What Lily Lake is good for

From access and monitoring records, not editorial picks.

Boat launch1 documented ramp
Fishing3 species recorded

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Lily Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

Compare swimming lakes near Green Bay →

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Water quality measurements for Lily Lake

These are the measurements Wisconsin DNR publishes for Lily Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Moderate clarity, visible to about 9.6 ft. TSI 45.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	9.6ft	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus		No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)		No reading The green pigment in algae — a direct measure of how much algae is in the water.
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	45	Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Moderate nutrients, good water quality

Ask about Lily Lake

Answers come straight from the public measurements and survey records on this page.

Water Temperature

Lily Lake typically sits around 72°F at the surface in August. Summer average is about 76°F. Usually warmest in Jul (about 79°F) and coldest in Apr (about 52°F). These are typical values by month — not a live reading.

Jan

Feb

Mar

52°

Apr

68°

May

Jun

79°

Jul

72°

Aug

Sep

Oct

Nov

Dec

Column height runs from this lake’s coldest month (52°F) to its warmest (79°F).

Typical surface water temperature by month, from 8 field readings (2025–2025) via the EPA Water Quality Portal. See the full Lily Lake water temperature breakdown →

DNR fisheries survey

Wisconsin DNR rates Largemouth Bass as abundant on Lily Lake.

A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lily Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1995. 4 stations on file (most recent sample 2025).

Fish Species (DNR-rated)

Largemouth Bass(Abundant)Panfish(Present)Northern Pike(Present)

Contour map (PDF) →Full WI DNR LakePage →Water quality stations →

Lake Details

Max depth

19 ft

Surface area

42 acres

Public access

Yes

Listed by Wisconsin DNR

Lake Size & Watershed

Watershed (drainage) area

0 sq mi

HydroLAKES / HydroSHEDS

Shoreline

1.1 mi

HydroLAKES / HydroSHEDS

Elevation

807 ft

Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).

Recreation & Access

Boat Landings

Yes

Public Access

Lily Lake ParkPublic

Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps

Stays via Stay22

Stays near Lily Lake

Compare lakeside cabins, hotels, and vacation rentals near Lily Lake in Brown County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

Top-rated places to stay near Lily Lake

Prices for Oct 16–18, 4 adults. Change dates on the map below.

Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.

Planning a whole trip? See where to stay at Wisconsin’s top lakes →

Follow Lily Lake’s readings

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Fish Species

Panfish Largemouth Bass Northern Pike

Click a species to see every lake where it is documented.

Fishing Lily Lake

Invasive & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Chinese Mystery SnailCurly-Leaf PondweedEurasian Water-MilfoilPurple Loosestrife

Regulated Pollution Sources Nearby

2 EPA-permitted facilities operate within about 5 miles of Lily Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.

Stencil Dairy Farms Llc
Denmark · 2.8 mi away · NPDES WI0056731
Recent violation
Belgioioso Cheese Inc Denmark
Glenmore · 4.4 mi away · NPDES WI0051128
Recent violation

Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.

Nearby Lakes in Brown County

Lgb Lake—View →Osnuhsa Lake5.6 ft clear · Eutrophic—View →Quarry Lake8 ft clear · Eutrophic—View →Sheas Lake5.4 ft clear—View →Engledinger Lake—View →Heidmann Lake15 ft clear—View →

Frequently asked questions about Lily Lake

Where is Lily Lake?: Lily Lake is a lake in Brown County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Lily Lake?: Lily Lake in Brown County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 9.6 ft visibility. Maximum depth: 19 ft. Surface area: 42 acres.
Is Lily Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lily Lake?: Lily Lake typically sits around 72°F at the surface in August, from 8 EPA Water Quality Portal field readings (2025–2025). That is a typical value for the month, not a live reading.
How deep is Lily Lake?: Lily Lake has a maximum depth of 19 feet. The lake covers 42 acres.
What fish are in Lily Lake?: Fish species found in Lily Lake include Panfish, Largemouth Bass, Northern Pike. Lily Lake is located in Brown County, Wisconsin.
What did the DNR fisheries survey find at Lily Lake?: Wisconsin DNR rates Largemouth Bass as abundant on Lily Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lily Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Lily Lake?: Lily Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lily Lake Park. Public access is listed as yes.
Can I fish at Lily Lake?: Lily Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.

Explore Lily Lake across LakeQuality

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State Parks Near Lily Lake

Heritage Hill State Historical Park

State Park · 9.5 mi

Other Lakes in Wisconsin

Sheas Lake

Kewaunee County · 5.4 ft

Engledinger Lake

Kewaunee County · Measured

Heidmann Lake

Kewaunee County · 15 ft

Grass Lake

Calumet County · Measured

East Alaska Lake

Kewaunee County · Measured

Silver Lake

Manitowoc County · Measured

Mesotrophic Lakes in Wisconsin

Tuma Lake West Alaska Lake East Alaska Lake Kasbaum Lake

Where this data comes from

4 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

Wisconsin Department of Natural ResourcesWIDNR_WQX4 samples · 2025

Monitoring station identifiers (1)

WIDNR_WQX-053228

EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.

Other records on this page

Regulated discharger data from EPA ECHO (ICIS-NPDES)

Lake size & watershed from HydroLAKES (HydroSHEDS)

Fish and recreation data from Wisconsin DNR Lakes

Named boat-access points from the USGS National Boat Ramps inventory