Bone Lake Water Temperature
Bone Lake in Washington County, Minnesota typically sits around 57°F at the surface in October — warmest in Jul (~69°F) and coldest in Apr (~52°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 (52°F) to its warmest (69°F).
Typical surface water temperature by month, from 185 field readings (2010–2024) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Bone Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Bone Lake water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.
Water temperatures at nearby Minnesota lakes
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Where to stay near Bone Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Bone 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 Bone Lake
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Frequently asked questions
What is the water temperature of Bone Lake?
Bone Lake typically sits around 57°F at the surface in October, from 185 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
When is Bone Lake warmest?
Surface water at Bone Lake is typically warmest in July, reaching about 69°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 Bone Lake warm enough to swim?
At its typical summer peak of about 68°F, Bone Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Bone 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 — 185 readings from 2 monitoring stations between 2010 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.