Little Long Lake Water Temperature
Little Long Lake in Hennepin County, Minnesota averages about 51°F at the surface in summer — warmest in Aug (~52°F) and coldest in Apr (~43°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 2,581 field readings (2010–2024) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Little Long Lake warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Little Long 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 ~70°F
Summer average ~67°F
Summer average ~61°F
Summer average ~72°F
Summer average ~54°F
Summer average ~62°F
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Frequently asked questions
What is the water temperature of Little Long Lake?
Little Long Lake has a typical summer surface temperature of about 51°F. It is usually warmest in August (around 52°F) and coldest in April (around 43°F). These are typical values by month from 2,581 EPA Water Quality Portal field readings (2010–2024), not a live reading.
When is Little Long Lake warmest?
Surface water at Little Long Lake is typically warmest in August, reaching about 52°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 Little Long Lake warm enough to swim?
At its typical summer peak of about 51°F, Little Long Lake rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Little Long 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 — 2,581 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.