George Lake Water Temperature
George Lake in Oneida County, Wisconsin averages about 75°F at the surface in summer — warmest in Jul (~77°F) and coldest in May (~52°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 12 field readings (2024–2026) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is George Lake warm enough to swim?
Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Want more than temperature? George Lake scored C on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Wisconsin lakes
Summer average ~72°F
Summer average ~72°F
Summer average ~77°F
Summer average ~73°F
Summer average ~71°F
Summer average ~71°F
Explore water temperatures
Where to stay near George Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near George Lake — live availability and prices.
Top-rated places to stay near George Lake
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 George Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near George Lake — straight to your inbox. No spam, unsubscribe anytime.
Frequently asked questions
What is the water temperature of George Lake?
George Lake has a typical summer surface temperature of about 75°F. It is usually warmest in July (around 77°F) and coldest in May (around 52°F). These are typical values by month from 12 EPA Water Quality Portal field readings (2024–2026), not a live reading.
When is George Lake warmest?
Surface water at George Lake is typically warmest in July, reaching about 77°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 George Lake warm enough to swim?
At its typical summer peak of about 75°F, George Lake rates as "comfortable" for swimming. Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Where does this George 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 — 12 readings from 2 monitoring stations 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.