Sag Quarry East Lake Water Temperature
Sag Quarry East Lake in Cook County, Illinois typically sits around 53°F at the surface in October — warmest in Jun (~71°F) and coldest in Oct (~53°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 35 field readings (2021–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Sag Quarry East Lake warm enough to swim?
Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Want more than temperature? Sag Quarry East Lake scored F on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Illinois lakes
Summer average ~77°F
Summer average ~78°F
Summer average ~76°F
Summer average ~80°F
Summer average ~72°F
Summer average ~79°F
Explore water temperatures
Where to stay near Sag Quarry East Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Sag Quarry East 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 Sag Quarry East Lake
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Frequently asked questions
What is the water temperature of Sag Quarry East Lake?
Sag Quarry East Lake typically sits around 53°F at the surface in October, from 35 EPA Water Quality Portal field readings (2021–2023). That is a typical value for the month, not a live reading.
When is Sag Quarry East Lake warmest?
Surface water at Sag Quarry East Lake is typically warmest in June, reaching about 71°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 Sag Quarry East Lake warm enough to swim?
At its typical summer peak of about 69°F, Sag Quarry East Lake rates as "cool" for swimming. Brisk but swimmable for short dips — most people acclimate after the first few minutes.
Where does this Sag Quarry East 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 — 35 readings from 2 monitoring stations between 2021 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.