Lake of the Falls Water Temperature
Lake of the Falls in Iron County, Wisconsin averages about 72°F at the surface in summer — warmest in Jul (~74°F) and coldest in Oct (~55°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 32 field readings (2024–2026) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Lake of the Falls warm enough to swim?
Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Want more than temperature? Lake of the Falls scored B on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Wisconsin lakes
Explore water temperatures
Where to stay near Lake of the Falls
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Lake of the Falls — live availability and prices.
Top-rated places to stay near Lake of the Falls
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 Lake of the Falls?
Get lake water-quality report cards plus the best cabin & lodging deals near Lake of the Falls — straight to your inbox. No spam, unsubscribe anytime.
Frequently asked questions
What is the water temperature of Lake of the Falls?
Lake of the Falls has a typical summer surface temperature of about 72°F. It is usually warmest in July (around 74°F) and coldest in October (around 55°F). These are typical values by month from 32 EPA Water Quality Portal field readings (2024–2026), not a live reading.
When is Lake of the Falls warmest?
Surface water at Lake of the Falls is typically warmest in July, reaching about 74°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 Lake of the Falls warm enough to swim?
At its typical summer peak of about 72°F, Lake of the Falls rates as "comfortable" for swimming. Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Where does this Lake of the Falls 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 — 32 readings from 1 monitoring station between 2024 and 2026. 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.