Grenquist Lake

Polk County, Wisconsin · WBIC 2669300

Size

58 acres

Max depth

30 ft

DNR lake type

Simple, Cool, dark water color

Water clarity

2.5 ft

Low, measured Jul 2016

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 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.

Water clarity

2.5 ft Secchi depthLowOlder reading

Last measured Jul 26, 2016. 49 readings on record, 1990 to 2016.

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 GRENQUIST LAKE - DEEP HOLE. Checked Oct 23, 2026.

Water temperature

A typical year Modeled estimate

  • Ice goes outabout Apr 17 (Apr 8 to Apr 24)
  • Surface reaches 48°Fabout Apr 21 (Apr 18 to May 3)
  • Surface reaches 64°Fabout May 11 (May 5 to May 16)
  • June surface73°F, usually 72 to 74°F
  • July surface79°F, usually 78 to 81°F
  • August surface74°F, usually 73 to 76°F

Forms a warm top layer around Apr 27, lasting about 164 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

Loading today's forecast…

Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.

Boat landings

Wisconsin DNR public boat access sites. Checked Oct 23, 2026.

More lakes in Polk County

All Polk County lakes

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.

Something wrong on this page? Report a problem.