Swift Lake
Walworth County, Wisconsin · WBIC 741800
Size
19 acres
Max depth
8 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
10 ft
Clear, measured Aug 2011
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
Drawn from the DNR's 24K hydrography (surveyed 1987), 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 depthClearOlder reading
Last measured Aug 16, 2011. 16 readings on record, 2003 to 2011.
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 SWIFT LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
Last measured Sep 5, 2025, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Mar 30 (Mar 26 to Apr 10)
- Surface reaches 48°Fabout Apr 10 (Apr 1 to Apr 18)
- Surface reaches 64°Fabout May 1 (Apr 17 to May 9)
- June surface77°F, usually 76 to 78°F
- July surface83°F, usually 81 to 85°F
- August surface78°F, usually 75 to 81°F
Forms a warm top layer around Jun 10, lasting about 59 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.
More lakes in Walworth County
- Peters Lake0.4 miles away
- Pleasant Lake2.9 miles away
- Lulu Lake3.3 miles away
- Pickerel Lake3.8 miles away
- Green Lake4.0 miles away
- Booth Lake4.4 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
- 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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