Half Moon Lake
Bayfield County, Wisconsin · WBIC 2762700
The DNR lists this lake's watershed (Iron River-Frontal Lake Superior) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
Size
106 acres
Max depth
10 ft
DNR lake type
Simple, Riverine
Water clarity
9 ft
Moderate, measured Aug 2024
A river-like water type, with flow instead of a still basin. 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 1990), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
9 ft Secchi depthModerate
Last measured Aug 26, 2024. 31 readings on record, 2007 to 2024.
Typical summer clarity (June to September): 7.5 ft, moderate, from 23 readings (2012 to 2024).
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 Half Moon Lake (T47 R08w S17) - Deep Hole. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 21 (Apr 17 to Apr 27)
- Surface reaches 48°Fabout Apr 29 (Apr 19 to May 5)
- Surface reaches 64°Fabout May 13 (May 7 to May 24)
- June surface72°F, usually 70 to 74°F
- July surface78°F, usually 77 to 79°F
- August surface74°F, usually 72 to 75°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.
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
- 1Moon Lake AccessBoat ramp · Gravel surface · Township
Directions - 2Half Moon Lake AccessBoat ramp · Gravel surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Bayfield County
- Moon Lake0.6 miles away
- Peterson Lake1.0 miles away
- Spider Lake1.2 miles away
- Fire Lake1.3 miles away
- Lost Lake1.9 miles away
- Bismarck Lake1.9 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
- 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.
Something wrong on this page? Report a problem.