Johns Lake
Waushara County, Wisconsin · WBIC 245800
The DNR lists this lake's watershed (Willow Creek-Frontal Lake Poygan) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
73 acres
Max depth
41 ft
DNR lake type
Simple, Warm, clear water color
Water clarity
28 ft
Clear, measured May 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 1961), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
28 ft Secchi depthClear
Last measured May 10, 2026. 136 readings on record, 1986 to 2026.
Typical summer clarity (June to September): 13 ft, clear, from 17 readings (2018 to 2025).
Measured at the monitoring station named “John's 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 John's Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 6 (Apr 3 to Apr 15)
- Surface reaches 48°Fabout Apr 20 (Apr 14 to Apr 29)
- Surface reaches 64°Fabout May 13 (May 9 to May 24)
- June surface72°F, usually 72 to 74°F
- July surface79°F, usually 77 to 80°F
- August surface75°F, usually 73 to 77°F
Forms a warm top layer around Apr 21, lasting about 175 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.
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
- Brown Troutlast stocked 2025 (adult (broodstock), large fingerling and yearling); stocked in 16 years since 2010
- Rainbow Troutlast stocked 2025 (large fingerling and yearling); stocked in 11 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
- 1Johns Lake Boat RampBoat ramp · Gravel surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Waushara County
- Tippetts Lake0.5 miles away
- Porters Lake1.2 miles away
- Irogami Lake1.5 miles away
- Alpine Lake1.6 miles away
- Silver Lake2.1 miles away
- Emerald Lake2.4 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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