Swamp Lake Deep Water Temperature
Swamp Lake Deep in Cook County, Minnesota typically sits around 61°F at the surface in September — warmest in Aug (~70°F) and coldest in Oct (~49°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 167 field readings (2010–2024) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Swamp Lake Deep warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Swamp Lake Deep 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
Summer average ~69°F
Summer average ~67°F
Summer average ~70°F
Summer average ~73°F
Summer average ~72°F
Summer average ~67°F
Explore water temperatures
Where to stay near Swamp Lake Deep
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Swamp Lake Deep — 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 Swamp Lake Deep
Prices for Sep 4–6, 4 adults. Change dates on the map below.
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 Swamp Lake Deep?
Get lake water-quality report cards plus the best cabin & lodging deals near Swamp Lake Deep — straight to your inbox. No spam, unsubscribe anytime.
Frequently asked questions
What is the water temperature of Swamp Lake Deep?
Swamp Lake Deep typically sits around 61°F at the surface in September, from 167 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
When is Swamp Lake Deep warmest?
Surface water at Swamp Lake Deep is typically warmest in August, reaching about 70°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 Swamp Lake Deep warm enough to swim?
At its typical summer peak of about 67°F, Swamp Lake Deep rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Swamp Lake Deep 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 — 167 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.