Coldwater Lake Water Temperature
Coldwater Lake in Isabella County, Michigan typically sits around 56°F at the surface in September — warmest in Aug (~56°F) and coldest in May (~51°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 479 field readings (2021–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Coldwater Lake warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Coldwater Lake scored A on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Michigan lakes
Summer average ~79°F
Summer average ~60°F
Summer average ~55°F
Summer average ~73°F
Summer average ~60°F
Summer average ~71°F
Explore water temperatures
Where to stay near Coldwater Lake
Planning a swim or lake trip? Compare cabins, lodges, and vacation rentals near Coldwater 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 Coldwater Lake
Prices for Sep 4–6, 4 adults. Change dates on the map below.
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Frequently asked questions
What is the water temperature of Coldwater Lake?
Coldwater Lake typically sits around 56°F at the surface in September, from 479 EPA Water Quality Portal field readings (2021–2023). That is a typical value for the month, not a live reading.
When is Coldwater Lake warmest?
Surface water at Coldwater Lake is typically warmest in August, reaching about 56°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 Coldwater Lake warm enough to swim?
At its typical summer peak of about 54°F, Coldwater Lake rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Coldwater 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 — 479 readings from 1 monitoring station 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.