Potato Lake Water Temperature
Potato Lake in Hubbard County, Minnesota averages about 67°F at the surface in summer — warmest in Aug (~73°F) and coldest in May (~55°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 138 field readings (2011–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Potato Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Potato Lake scored A on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Minnesota lakes
Summer average ~67°F
Summer average ~72°F
Summer average ~72°F
Summer average ~72°F
Summer average ~63°F
Summer average ~61°F
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Frequently asked questions
What is the water temperature of Potato Lake?
Potato Lake has a typical summer surface temperature of about 67°F. It is usually warmest in August (around 73°F) and coldest in May (around 55°F). These are typical values by month from 138 EPA Water Quality Portal field readings (2011–2025), not a live reading.
When is Potato Lake warmest?
Surface water at Potato Lake is typically warmest in August, reaching about 73°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 Potato Lake warm enough to swim?
At its typical summer peak of about 67°F, Potato Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Potato 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 — 138 readings from 2 monitoring stations between 2011 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.