Oak Lake
Burnett County, Wisconsin183 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Oak Lake. Here is what has been measured.
- 19 ft max depth
- Limited data
Oak Lake in Burnett County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 11.3 ft visibility. Maximum depth: 19 ft. Surface area: 183 acres.
Wisconsin DNR rates Largemouth Bass as abundant on Oak Lake. DNR survey details →
Oak Lake is a 183-acre lake in Burnett County, Wisconsin with a maximum depth of 19 feet. Overall water quality is improving over recent sampling years. The lake supports 3 documented fish species including Panfish, Largemouth Bass, and Northern Pike.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-01. Methodology: how these readings are compared.
What Oak Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11.3 ft of visibility
- Fishing3 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Oak 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.
Water quality measurements for Oak Lake
These are the measurements Wisconsin DNR publishes for Oak Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 11.3 ft. TSI 42.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 11.3ft | 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. | 42 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Oak Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Oak Lake typically sits around 55°F at the surface in October. Summer average is about 78°F. Usually warmest in Aug (about 83°F) and coldest in Oct (about 55°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (55°F) to its warmest (83°F).
Typical surface water temperature by month, from 11 field readings (2024–2025) via the EPA Water Quality Portal. See the full Oak Lake water temperature breakdown →
Wisconsin DNR rates Largemouth Bass as abundant on Oak Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Oak Lake’s water-quality measurements separately, and the water-quality trend over 3 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. Monitored by volunteers since 2004. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Lake Details
Max depth
19 ft
Surface area
183 acres
Lake Size & Watershed
Watershed (drainage) area
1 sq mi
HydroLAKES / HydroSHEDS
Shoreline
3 mi
HydroLAKES / HydroSHEDS
Elevation
984 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Oak Lake
Compare lakeside cabins, hotels, and vacation rentals near Oak Lake in Burnett 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 Oak Lake
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Follow Oak Lake’s readings
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Fish Species
Click a species to see every lake where it is documented.
Fishing Oak Lake
Water quality readings over time
3 seasons of samples on record (2021–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving3 years
Nearby Lakes in Burnett County
Frequently asked questions about Oak Lake
Where is Oak Lake?
- Oak Lake is a lake in Burnett County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Oak Lake?
- Oak Lake in Burnett County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 11.3 ft visibility. Maximum depth: 19 ft. Surface area: 183 acres.
Is Oak 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 Oak Lake?
- Oak Lake typically sits around 55°F at the surface in October, from 11 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
How deep is Oak Lake?
- Oak Lake has a maximum depth of 19 feet. The lake covers 183 acres.
What fish are in Oak Lake?
- Fish species found in Oak Lake include Panfish, Largemouth Bass, Northern Pike. Oak Lake is located in Burnett County, Wisconsin.
What did the DNR fisheries survey find at Oak Lake?
- Wisconsin DNR rates Largemouth Bass as abundant on Oak Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Oak Lake’s water-quality measurements separately, and the water-quality trend over 3 years of monitoring is improving. Catch rate is not a swim clearance and is not a weekly bite report.
Explore Oak Lake across LakeQuality
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Where this data comes from
15 measurements from 1 monitoring station, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX15 samples · 2021–2025
Monitoring station identifiers (1)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes