Lake Country /  The Lakes  /  Okauchee

Okauchee Lake

One of Lake Country's largest and liveliest waters: Okauchee is big, social, and built for a full day on the lake.

1,210 ac
Surface acres
90 ft
Max depth
Drainage lake
Lake type
Fed by the Oconomowoc River
Source: WI DNR · WBIC 850300
Public boat access

The lake, mapped

The real Okauchee shoreline with every public boat launch - where you get on and off the water. Sourced from the Wisconsin DNR public boat-access data and local knowledge.

Real Okauchee shoreline with public boat launches - click a pin for details. Ramp
Boat launches & landings
Okauchee Lake Boat LaunchRampPublic landing
Public DNR & municipal boat launches. Private residential launches are intentionally excluded.
Built from public DNR data

The Okauchee Water Record

Clarity, trophic state, and nutrients - pulled from Wisconsin DNR lake monitoring and refreshed each open-water monitoring season (roughly May-October; quiet over winter).

Lake health grade · derived from DNR trophic-state data
B+
Good & stable
5-yr avg TSI 45 · mesotrophic
Water clarity (Secchi)
13 ft
Deep-hole reading · very clear water
Jun 2026
Chlorophyll-a
0.52 µg/L
Low late-summer · clear-water range
Jun 2026
Phosphorus
20.9 µg/L
Mesotrophic · low bloom-risk range
latest available · Jun 2026
Blue-green algae

Wisconsin doesn’t routinely monitor inland lakes for blue-green algae - the state tracks blooms by report, not on a schedule, so no lake carries an official season-by-season advisory record. See a bloom? Avoid contact until it clears and report it to the DNR →

Game fish · DNR-confirmed
MuskyWalleyeNorthern PikeLargemouth BassSmallmouth BassPanfish
Invasive species present
Eurasian (& Hybrid) Water-MilfoilZebra MusselStarry StonewortCurly-Leaf PondweedBanded & Chinese Mystery SnailPurple Loosestrife
Source: WI DNR SWIMS / Citizen Lake Monitoring Network, via the federal Water Quality Portal · refreshed through the DNR monitoring season (≈ May-Oct), not real-timeGet free water-quality alerts →
The character of the water

What it's actually like to own here

The nuance with the lake - what the bottom is like underfoot and how the weekend actually feels.

Bottom
Sand & muck
DNR: 35% sand, 35% muck, 25% gravel, 5% rock.
Weekend traffic
High
On-water activity on a typical summer weekend.
Communities
Municipalities
  • Town of Merton
  • Village of Lac La Belle
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