Granite Lake Water Temperature
Granite Lake in Wright County, Minnesota averages about 68°F at the surface in summer — warmest in Jul (~69°F) and coldest in May (~58°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 205 field readings (2010–2024) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Granite Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Granite Lake scored C on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Minnesota lakes
Explore water temperatures
Where to stay near Granite Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Granite Lake — live availability and prices.
Top-rated places to stay near Granite 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 Granite Lake?
Get lake water-quality report cards plus the best cabin & lodging deals near Granite Lake — straight to your inbox. No spam, unsubscribe anytime.
Frequently asked questions
What is the water temperature of Granite Lake?
Granite Lake has a typical summer surface temperature of about 68°F. It is usually warmest in July (around 69°F) and coldest in May (around 58°F). These are typical values by month from 205 EPA Water Quality Portal field readings (2010–2024), not a live reading.
When is Granite Lake warmest?
Surface water at Granite 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 Granite Lake warm enough to swim?
At its typical summer peak of about 68°F, Granite Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Granite 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 — 205 readings from 1 monitoring station 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.