Greenwood Lake Water Temperature
Greenwood Lake in Cook County, Minnesota typically sits around 52°F at the surface in September — warmest in Aug (~54°F) and coldest in May (~44°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 1,200 field readings (2018–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Greenwood Lake warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Greenwood 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
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Where to stay near Greenwood Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Greenwood 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 Greenwood Lake
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Frequently asked questions
What is the water temperature of Greenwood Lake?
Greenwood Lake typically sits around 52°F at the surface in September, from 1,200 EPA Water Quality Portal field readings (2018–2025). That is a typical value for the month, not a live reading.
When is Greenwood Lake warmest?
Surface water at Greenwood Lake is typically warmest in August, reaching about 54°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 Greenwood Lake warm enough to swim?
At its typical summer peak of about 52°F, Greenwood Lake rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Greenwood 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 — 1,200 readings from 1 monitoring station between 2018 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.