Diamond Lake
Vilas County, Wisconsin · WBIC 1844700
Size
122 acres
Max depth
40 ft
DNR lake type
Complex, Cool, clear water color
Water clarity
18 ft
Clear, measured Aug 2012
A cool-water lake type: the DNR groups it with lakes that stay cooler 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 1981), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
18 ft Secchi depthClearOlder reading
Last measured Aug 14, 2012. 88 readings on record, 1988 to 2012.
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 DIAMOND LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 25 (Apr 16 to Apr 30)
- Surface reaches 48°Fabout May 5 (Apr 27 to May 10)
- Surface reaches 64°Fabout May 27 (May 22 to Jun 1)
- June surface68°F, usually 67 to 69°F
- July surface74°F, usually 73 to 75°F
- August surface71°F, usually 69 to 73°F
Forms a warm top layer around May 8, lasting about 147 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
- 1Diamond Lake Boat RampBoat ramp · Concrete Plank surface · State(dot)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Vilas County
- Day Lake1.4 miles away
- Lower Gresham Lake1.7 miles away
- Middle Gresham Lake1.8 miles away
- Trout Lake1.9 miles away
- Upper Gresham Lake2.0 miles away
- Sparkling Lake2.6 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
- 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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