Flynn Lake
Bayfield County, Wisconsin · WBIC 2902800
The DNR lists this lake's watershed (White River) 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
29 acres
Max depth
9 ft
DNR lake type
Complex, Riverine
Water clarity
9 ft
Moderate, measured Jun 2023
A river-like water type, with flow instead of a still basin. 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
9 ft Secchi depthModerate
Last measured Jun 1, 2023. 73 readings on record, 2003 to 2023.
Typical summer clarity (June to September): 9 ft, moderate, from 33 readings (2012 to 2023).
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 Flynn Lake (T46nr08ws03) - Deep Hole. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 20 (Apr 14 to Apr 25)
- Surface reaches 48°Fabout Apr 28 (Apr 18 to May 2)
- Surface reaches 64°Fabout May 10 (May 5 to May 14)
- June surface74°F, usually 71 to 76°F
- July surface80°F, usually 78 to 80°F
- August surface74°F, usually 73 to 76°F
Forms a warm top layer around Jun 27, lasting about 41 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
- Inch Lake0.5 miles away
- Hildur Lake0.6 miles away
- Eagle Lake0.6 miles away
- Bog Lake1.1 miles away
- Trout Lake1.2 miles away
- Twin Bear Lake1.2 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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