Lake Winneconne
Winnebago County, Wisconsin4,553 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Lake Winneconne. Here is what has been measured.
- Impaired · Cause unknown
- 5 aquatic invasives
- 9 ft max depth
- Public access
- Limited data
Lake Winneconne in Winnebago County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2.5 ft visibility. Maximum depth: 9 ft. Surface area: 4553 acres.
Wisconsin DNR rates Panfish, Northern Pike, Sturgeon, and Catfish as abundant on Lake Winneconne. DNR survey details →
Lake Winneconne is a 4,553-acre lake in Winnebago County, Wisconsin with a maximum depth of 9 feet. Overall water quality is improving over recent sampling years. The lake supports 8 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available with 4 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2026-07-06. Methodology: how these readings are compared.
Lake Winneconne covers about 4,600 acres in Winnebago County. It has 4 public boat landings, so a lakefront rental is not the only way to get a boat on the water. For a place on the water, look through cabin and lake-house rentals near Lake Winneconne on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Lake Winneconne is good for
From access and monitoring records, not editorial picks.
- Boat launch4 documented ramps
- Fishing8 species recorded
- Big water4,553 acres
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Lake Winneconne is listed impaired under Clean Water Act §303(d) (IR 5) for cause unknown, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
Whether Lake Winneconne 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.
Water quality measurements for Lake Winneconne
These are the measurements Wisconsin DNR publishes for Lake Winneconne, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.5 ft of visibility. TSI 64.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.5ft | 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. | 64 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Winneconne
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Lake Winneconne typically sits around 52°F at the surface in October. Summer average is about 75°F. Usually warmest in Jul (about 77°F) and coldest in Oct (about 52°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (52°F) to its warmest (77°F).
Typical surface water temperature by month, from 47 field readings (2024–2026) via the EPA Water Quality Portal. See the full Lake Winneconne water temperature breakdown →
Blue-Green Algae (Cyanobacteria)
There’s no recent EPA CyAN cyanobacteria estimate for Lake Winneconne — clouds, ice, or an off-season gap in coverage. The most recent reading was high (772,681 cells/mL) on July 18, 2026.
Blue-green algae can appear and clear within days, so check your state’s current advisory before swimming. EPA CyAN ↗
Wisconsin DNR rates Panfish, Northern Pike, Sturgeon, and Catfish as abundant on Lake Winneconne.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Winneconne’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is improving. 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. 16 stations on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
9 ft
Surface area
4,553 acres
Public access
Yes
Listed by Wisconsin DNR
Recreation & Access
- Indian Shore RoadPublic
- North First StreetPublic
- Yost RoadPublic
- Lake Winneconne 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 Lake Winneconne
Compare lakeside cabins, hotels, and vacation rentals near Lake Winneconne in Winnebago 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 Lake Winneconne
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 trip? Cabins and lodging at Lake Winneconne → · more Wisconsin lake trips
Follow Lake Winneconne’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Lake Winneconne
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Water Quality Trend: Improving
Based on 7 years of monitoring (2020–2026).
Water clarity
Improving7 years
EPA Impairment Status
Lake Winneconne is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit WI10000776 · Official waterbody report
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Lake Winneconne under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Winneconne Wastewater TreatmenWinneconne · 1.3 mi away · NPDES WI0021938Recent violation
- Cross Farms LlcWinneconne, Town Of · 3.6 mi away · NPDES WI0059226
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 Winnebago County
Frequently asked questions about Lake Winneconne
Where is Lake Winneconne?
- Lake Winneconne is a lake in Winnebago County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Lake Winneconne?
- Lake Winneconne in Winnebago County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2.5 ft visibility. Maximum depth: 9 ft. Surface area: 4553 acres.
Is Lake Winneconne safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Lake Winneconne is listed impaired under Clean Water Act §303(d) (IR 5) for cause unknown, nutrients (phosphorus, nitrogen), turbidity. Check local advisories before you swim.
What is the water temperature of Lake Winneconne?
- Lake Winneconne typically sits around 52°F at the surface in October, from 47 EPA Water Quality Portal field readings (2024–2026). That is a typical value for the month, not a live reading.
How deep is Lake Winneconne?
- Lake Winneconne has a maximum depth of 9 feet. The lake covers 4553 acres.
What fish are in Lake Winneconne?
- Fish species found in Lake Winneconne include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye, Sturgeon, Catfish. Lake Winneconne is located in Winnebago County, Wisconsin.
What did the DNR fisheries survey find at Lake Winneconne?
- Wisconsin DNR rates Panfish, Northern Pike, Sturgeon, and Catfish as abundant on Lake Winneconne. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Lake Winneconne’s water-quality measurements separately, and the water-quality trend over 7 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Does Lake Winneconne have blue-green algae?
- There is no recent EPA CyAN cyanobacteria estimate for Lake Winneconne (clouds, ice, or an off-season gap). The most recent reading was high (772,681 cells/mL). Blue-green algae can appear and clear within days, so check Wisconsin's current advisory before swimming.
Are there boat ramps on Lake Winneconne?
- Lake Winneconne has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Indian Shore Road, North First Street, Yost Road, Lake Winneconne Park. Public access is listed as yes.
Can I fish at Lake Winneconne?
- Lake Winneconne has 4 documented boat landings 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 Lake Winneconne across LakeQuality
Depth, room, public access, and the state wake-sport rules
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Fish species and best lakes in Winnebago County
Species activity outlook by water temperature and season
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Where this data comes from
60 measurements from 2 monitoring stations, 2020–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX60 samples · 2020–2026
Monitoring station identifiers (2)
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Fish and recreation data from Wisconsin DNR Lakes
Named boat-access points from the USGS National Boat Ramps inventory