Nepco Lake
Wood County, Wisconsin · WBIC 1389800
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
494 acres
Max depth
29 ft
DNR lake type
Complex, Warm, dark water color
Water clarity
10 ft
Clear, measured Oct 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 1984), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
10 ft Secchi depthClear
Last measured Oct 11, 2026. 68 readings on record, 1997 to 2026.
Typical summer clarity (June to September): 10.5 ft, clear, from 40 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 Nepco Lake - Deep Hole E Of Dam. Checked Oct 23, 2026.
Water temperature
62.9°F surface, measured Oct 11, 2026
Measured near the surface (0 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 11 (Apr 3 to Apr 21)
- Surface reaches 48°Fabout May 5 (Apr 24 to May 9)
- Surface reaches 64°Fabout May 20 (May 10 to May 25)
- June surface74°F, usually 73 to 76°F
- July surface80°F, usually 79 to 81°F
- August surface76°F, usually 74 to 78°F
Forms a warm top layer around Apr 29, lasting about 193 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.
Stocking history
- Muskellungelast stocked 2024 (fall yearling, large fingerling and yearling); stocked in 8 years since 2010
- Walleyelast stocked 2022 (large fingerling and small fingerling); stocked in 7 years since 2010
- Northern Pikelast stocked 2016 (large fingerling); stocked in 3 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
Boat landings
- 1Nepco Lake County Park Boat RampBoat ramp · Concrete Panels surface · Accessible features · County
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Wood County
- Nekoosa Flowage2.5 miles away
- Ross Lake5.6 miles away
- Petenwell Lake14 miles away
- Dexter Lake15 miles away
- South Gallagher Flowage17 miles away
- Lake Kaunewinne20 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
- Stocking historyWisconsin DNR annual fish stocking summary, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), 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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