Lake Nancy
Washburn County, Wisconsin · WBIC 2691500
Size
772 acres
Max depth
39 ft
DNR lake type
Complex, Warm, clear water color
Water clarity
15.5 ft
Clear, measured Aug 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 2000), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
15.5 ft Secchi depthClear
Last measured Aug 17, 2026. 209 readings on record, 2002 to 2026.
Typical summer clarity (June to September): 14.5 ft, clear, from 69 readings (2012 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 LAKE NANCY - SITE B - DEEP HOLE SE BASIN. Checked Oct 23, 2026.
Water temperature
Last measured Aug 17, 2026, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 19 (Apr 10 to Apr 26)
- Surface reaches 48°Fabout May 1 (Apr 22 to May 8)
- Surface reaches 64°Fabout May 29 (May 27 to Jun 5)
- June surface70°F, usually 68 to 71°F
- July surface75°F, usually 74 to 77°F
- August surface72°F, usually 71 to 74°F
Forms a warm top layer around Jun 12, lasting about 81 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
- 1Nancy Lake AccessBoat ramp · Gravel surface · Township
Directions - 2Lake Nancy RampBoat ramp · Gravel surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Washburn County
- Banks Lake1.1 miles away
- Sherman Lake1.5 miles away
- Bughouse Lake1.7 miles away
- Middle Lake2.0 miles away
- Adventure Lake2.1 miles away
- South Twin Lake,Twin Lakes2.2 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
- 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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