Flambeau Lake Deep Water Temperature
Flambeau Lake Deep in Vilas County, Wisconsin typically sits around 57°F at the surface in September — warmest in Jun (~58°F) and coldest in Sep (~57°F). That is a typical value for the month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 58 field readings (2024–2024) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Flambeau Lake Deep warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Flambeau Lake Deep scored NR 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 ~66°F
Summer average ~73°F
Summer average ~72°F
Summer average ~74°F
Summer average ~72°F
Summer average ~71°F
Explore water temperatures
Where to stay near Flambeau Lake Deep
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Flambeau Lake Deep — 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 Flambeau Lake Deep
Prices for Sep 4–6, 4 adults. Change dates on the map below.
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Frequently asked questions
What is the water temperature of Flambeau Lake Deep?
Flambeau Lake Deep typically sits around 57°F at the surface in September, from 58 EPA Water Quality Portal field readings (2024–2024). That is a typical value for the month, not a live reading.
When is Flambeau Lake Deep warmest?
Surface water at Flambeau Lake Deep is typically warmest in June, reaching about 58°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 Flambeau Lake Deep warm enough to swim?
At its typical summer peak of about 58°F, Flambeau Lake Deep rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Flambeau Lake Deep 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 — 58 readings from 1 monitoring station between 2024 and 2024. 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.