Fourmile Lake
Oneida County, Wisconsin · WBIC 1610800
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
218 acres
Max depth
29 ft
DNR lake type
Complex, Two Story
Water clarity
3 ft
Low, measured Sep 2026
A deep lake type that can hold a cold layer below the warm surface in summer. This describes the lake type in general, not this lake in particular.
Outline
Drawn from the DNR's 24K hydrography (surveyed 1991), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
3 ft Secchi depthLow
Last measured Sep 24, 2026. 88 readings on record, 1993 to 2026.
Typical summer clarity (June to September): 3 ft, low, from 68 readings (2012 to 2026).
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 Fourmile Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
61.2°F surface, measured Sep 24, 2026
Measured near the surface (0.91 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 22 (Apr 15 to Apr 27)
- Surface reaches 48°Fabout May 1 (Apr 23 to May 8)
- Surface reaches 64°Fabout May 25 (May 18 to May 31)
- June surface70°F, usually 68 to 71°F
- July surface75°F, usually 74 to 76°F
- August surface72°F, usually 70 to 73°F
Forms a warm top layer around May 24, lasting about 107 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 Oneida County
- Lone Stone Lake1.3 miles away
- Big Fork Lake1.3 miles away
- Spring Lake1.9 miles away
- Little Fork Lake2.1 miles away
- Island Lake2.8 miles away
- Round Lake2.9 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
- 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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