Deep Lake
Bayfield County, Wisconsin · WBIC 2760100
The DNR lists this lake's watershed (Iron River-Frontal Lake Superior) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
Size
103 acres
Max depth
28 ft
DNR lake type
Complex, Warm, clear water color
Water clarity
13.5 ft
Clear, measured Oct 1986
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 1990), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
13.5 ft Secchi depthClearOlder reading
Last measured Oct 2, 1986. 6 readings on record, 1986.
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 Deep Lake (T47nr09w14) - Deep Hole. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 21 (Apr 17 to Apr 27)
- Surface reaches 48°Fabout May 1 (Apr 19 to May 5)
- Surface reaches 64°Fabout May 23 (May 11 to May 30)
- June surface72°F, usually 71 to 74°F
- July surface78°F, usually 77 to 79°F
- August surface75°F, usually 73 to 76°F
Forms a warm top layer around May 4, lasting about 151 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.
More lakes in Bayfield County
- Hostrawser Lake0.6 miles away
- Simpson Lake0.7 miles away
- Crystal Lake0.8 miles away
- Jones Lake1.1 miles away
- Richardson Lake1.1 miles away
- Russell Lake1.5 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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