Emerald Lake
Waushara County, Wisconsin · WBIC 246700
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
Size
11 acres
Max depth
14 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
11.2 ft
Clear, measured Sep 2001
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
11.2 ft Secchi depthClearOlder reading
Last measured Sep 2, 2001. 2 readings on record, 1999 to 2001.
Only a few readings are on record.
Nothing has been measured in the last 5 years, so this may not match the lake today.
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 EMERALD LAKE - EMERALD LAKE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 6 (Apr 1 to Apr 14)
- Surface reaches 48°Fabout Apr 18 (Apr 10 to Apr 24)
- Surface reaches 64°Fabout May 3 (Apr 20 to May 9)
- June surface74°F, usually 73 to 76°F
- July surface81°F, usually 78 to 81°F
- August surface76°F, usually 73 to 77°F
Forms a warm top layer around May 15, lasting about 72 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.
Boat landings
- 1Lake Morris Park Boat RampBoat ramp · Concrete surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Waushara County
- Little Lake0.5 miles away
- Lake Morris0.6 miles away
- Porters Lake1.7 miles away
- Norwegian Lake2.3 miles away
- Cooks Lake2.3 miles away
- Johns 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
- 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
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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