Moon Lake
Marquette County, Wisconsin · WBIC 101700
Size
73 acres
Max depth
12 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
10 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 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 Sep 14, 2026. 4 readings on record, 2026.
Only a few readings are on record.
Measured at the monitoring station named “Moon (Birch) Lake - Deep Hole”.
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 Moon (Birch) Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
71.2°F surface, measured Sep 14, 2026
Measured near the surface (1 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 7 (Apr 1 to Apr 15)
- Surface reaches 48°Fabout Apr 20 (Apr 13 to Apr 26)
- Surface reaches 64°Fabout May 10 (May 4 to May 13)
- June surface74°F, usually 74 to 76°F
- July surface81°F, usually 79 to 81°F
- August surface76°F, usually 73 to 77°F
Forms a warm top layer around Jun 15, lasting about 32 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
- 1Moon Lake Boat RampBoat ramp · Gravel surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Marquette County
- Kilby Lake0.6 miles away
- Clearwater Lake0.8 miles away
- Lake Montello1.4 miles away
- Williams Lake3.1 miles away
- Metcalf Lake3.2 miles away
- Spring Lake3.2 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
- 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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