Long Lake
Burnett County, Wisconsin · WBIC 2674100
Size
251 acres
Max depth
41 ft
DNR lake type
Complex, Warm, clear water color
Water clarity
17.2 ft
Clear, measured Sep 2026
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 1983), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
17.2 ft Secchi depthClear
Last measured Sep 15, 2026. 103 readings on record, 1990 to 2026.
Typical summer clarity (June to September): 17.6 ft, clear, from 22 readings (2013 to 2026).
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 Long Lake (T41n R14w S33) - Deep Hole. Checked Oct 23, 2026.
Water temperature
62°F surface, measured Sep 15, 2026
Measured near the surface (0 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 18 (Apr 6 to Apr 25)
- Surface reaches 48°Fabout May 6 (Apr 24 to May 10)
- Surface reaches 64°Fabout May 25 (May 18 to May 26)
- June surface72°F, usually 70 to 73°F
- July surface78°F, usually 77 to 79°F
- August surface75°F, usually 73 to 77°F
Forms a warm top layer around May 2, lasting about 194 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.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). 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.
Boat landings
- 1Long Lake AccessBoat ramp · Concrete Panels surface · Township
Directions - 2Des Moines Lake AccessBoat ramp · Concrete Panels surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Burnett County
- Des Moines Lake0.3 miles away
- Lucerne Lake1.1 miles away
- Hanscom Lake1.3 miles away
- Ferry Lake1.4 miles away
- Fish Lake1.4 miles away
- Little Bear Lake1.5 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
- 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
- Measured temperatureWisconsin 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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