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LakeQuality
A wave breaking on the cobble beach of Lake Superior at Duluth, Minnesota, with a wooded headland beyond

Divide Lake Water Temperature

Divide Lake in Lake County, Minnesota typically sits around 51°F at the surface in October — warmest in Jul (~72°F) and coldest in Oct (~51°F). That is a typical value for the month, not a live reading.

Typical in October
51°F
Cold
Summer average
68°F
Warmest (Jul)
72°F
Coldest (Oct)
51°F

Typical water temperature by month

Jan
Feb
Mar
Apr
52°
May
62°
Jun
72°
Jul
69°
Aug
62°
Sep
51°
Oct
Nov
Dec

Column height runs from this lake’s coldest month (51°F) to its warmest (72°F).

Typical surface water temperature by month, from 67 field readings (2010–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.

Is Divide Lake warm enough to swim?

At its summer peak (~68°F): Cool

Brisk but swimmable for short dips — most people acclimate after the first few minutes.

Want more than temperature? Divide Lake water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.

Where to stay near Divide Lake

Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Divide 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 Divide Lake

Prices for Oct 23–25, 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.

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Frequently asked questions

What is the water temperature of Divide Lake?

Divide Lake typically sits around 51°F at the surface in October, from 67 EPA Water Quality Portal field readings (2010–2023). That is a typical value for the month, not a live reading.

When is Divide Lake warmest?

Surface water at Divide Lake is typically warmest in July, reaching about 72°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 Divide Lake warm enough to swim?

At its typical summer peak of about 68°F, Divide Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.

Where does this Divide 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 — 67 readings from 2 monitoring stations between 2010 and 2023. 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.