Firefly Lake
Vilas County, Wisconsin33 acresView mapDirections
No nutrient or algae sampling on record from Wisconsin DNR for this lake.
- 46 ft max depth
Firefly Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 45.9 ft. Surface area: 33 acres.
Firefly Lake is a 33-acre lake in Vilas County, Wisconsin with a maximum depth of 46 feet.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water. Methodology: how these readings are compared.
What Firefly Lake is good for
From access and monitoring records, not editorial picks.
- Deep water45.9 ft surveyed max depth
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Firefly 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 Firefly Lake
These are the measurements Wisconsin DNR publishes for Firefly Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Firefly Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
45.9 ft
Surface area
33 acres
Shoreline
0.9 mi
Stays via Stay22
Stays near Firefly Lake
Compare lakeside cabins, hotels, and vacation rentals near Firefly Lake in Vilas 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 Firefly 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 Firefly Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Firefly Lake
Nearby Lakes in Vilas County
Frequently asked questions about Firefly Lake
Where is Firefly Lake?
- Firefly Lake is a lake in Vilas County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Firefly Lake?
- Firefly Lake in Vilas County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Maximum depth: 45.9 ft. Surface area: 33 acres.
Is Firefly Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Firefly Lake?
- Firefly Lake has a maximum depth of 45.9 feet. The lake covers 33 acres.
Explore Firefly Lake across LakeQuality
Fish species and the cleanest lakes across Wisconsin
Fish species and best lakes in Vilas County
Species activity outlook by water temperature and season
Top lakes and where to stay in the Northwoods Wisconsin area
Where to stay at Wisconsin's top lakes, each with its readings
Lakes in the Wisconsin River Watershed, ranked by water quality
Wisconsin's cleanest lakes, ranked on agency measurements
More lakes in Wisconsin
Other Lakes in Wisconsin
Where this data comes from
Measurements for Firefly Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.