Halfmoon Lake
Lincoln County, Wisconsin · WBIC 988000
Size
106 acres
Max depth
14 ft
DNR lake type
Simple, Harsh
Water clarity
7 ft
Moderate, measured Aug 2025
A lake type the DNR marks as having harsh conditions for fish. 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 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
7 ft Secchi depthModerate
Last measured Aug 27, 2025. 79 readings on record, 1999 to 2025.
Typical summer clarity (June to September): 7.7 ft, moderate, from 46 readings (2013 to 2025).
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 Halfmoon Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
Last measured Jul 7, 2025, 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 Apr 30 (Apr 18 to May 7)
- Surface reaches 64°Fabout May 24 (May 13 to May 28)
- June surface70°F, usually 69 to 71°F
- July surface75°F, usually 74 to 76°F
- August surface72°F, usually 70 to 74°F
Mixes regularly through the summer instead of forming a warm top layer.
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
- Largemouth Basslast stocked 2024 (large fingerling); stocked in 1 year 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
- 1Halfmoon Lake RampBoat ramp · Concrete Plank surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Lincoln County
- Clear Lake0.7 miles away
- Jersey City Flowage0.7 miles away
- Slater Lake1.2 miles away
- Crystal Lake1.7 miles away
- Muskellunge Lake2.1 miles away
- Deer Lake2.3 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
- 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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