Moccasin Lake Water Temperature
Moccasin Lake in Vilas County, Wisconsin typically sits around 66°F at the surface in September — warmest in Aug (~76°F) and coldest in Oct (~59°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 18 field readings (2024–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Moccasin Lake warm enough to swim?
Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Want more than temperature? Moccasin Lake 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
Summer average ~72°F
Summer average ~71°F
Summer average ~71°F
Summer average ~72°F
Summer average ~74°F
Summer average ~71°F
Explore water temperatures
Where to stay near Moccasin Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Moccasin 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 Moccasin Lake
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 Moccasin Lake?
Moccasin Lake typically sits around 66°F at the surface in September, from 18 EPA Water Quality Portal field readings (2024–2025). That is a typical value for the month, not a live reading.
When is Moccasin Lake warmest?
Surface water at Moccasin Lake is typically warmest in August, reaching about 76°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 Moccasin Lake warm enough to swim?
At its typical summer peak of about 76°F, Moccasin Lake rates as "comfortable" for swimming. Pleasant for swimming — the range most people find enjoyable without a wetsuit.
Where does this Moccasin 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 — 18 readings from 2 monitoring stations 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.