King Lake Water Temperature
King Lake in Marinette County, Wisconsin typically sits around 50°F at the surface in October — warmest in Sep (~55°F) and coldest in Apr (~42°F). That is a typical value for the month, not a live reading.
Typical water temperature by month
Column height runs from this lake’s coldest month (42°F) to its warmest (55°F).
Typical surface water temperature by month, from 287 field readings (2024–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is King Lake warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? King Lake water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.
Water temperatures at nearby Wisconsin lakes
Explore water temperatures
Where to stay near King Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near King Lake — live availability and prices. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near King Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to King Lake?
Get lake water-quality updates plus the best cabin & lodging deals near King Lake — straight to your inbox. No spam, unsubscribe anytime.
Frequently asked questions
What is the water temperature of King Lake?
King Lake typically sits around 50°F at the surface in October, from 287 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
When is King Lake warmest?
Surface water at King Lake is typically warmest in September, reaching about 55°F. Lake surface temperature lags air temperature by several weeks, so the warmest water usually arrives in mid-to-late summer even though the hottest air can come earlier.
Is King Lake warm enough to swim?
At its typical summer peak of about 51°F, King Lake rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this King Lake water temperature data come from?
Every temperature on this page is a typical (climatological) value computed from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal — 287 readings from 1 monitoring station between 2024 and 2025. They describe what is typical for each month, not the temperature right now.
About this data
Water temperatures are a climatology — the typical value for each month, averaged from real surface-water field readings collected by state and federal agencies and published through the EPA Water Quality Portal. They tell you what to expect, not the temperature at this moment. Actual conditions vary with recent weather, depth, and time of day.