Birch Lake Central Basin; Porter Township Water Temperature
Birch Lake Central Basin; Porter Township in Cass County, Michigan averages about 55°F at the surface in summer — warmest in Aug (~56°F) and coldest in May (~50°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 1,510 field readings (2010–2023) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Birch Lake Central Basin; Porter Township warm enough to swim?
Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Want more than temperature? Birch Lake Central Basin; Porter Township 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 ~60°F
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Summer average ~66°F
Summer average ~72°F
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Frequently asked questions
What is the water temperature of Birch Lake Central Basin; Porter Township?
Birch Lake Central Basin; Porter Township has a typical summer surface temperature of about 55°F. It is usually warmest in August (around 56°F) and coldest in May (around 50°F). These are typical values by month from 1,510 EPA Water Quality Portal field readings (2010–2023), not a live reading.
When is Birch Lake Central Basin; Porter Township warmest?
Surface water at Birch Lake Central Basin; Porter Township 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 Birch Lake Central Basin; Porter Township warm enough to swim?
At its typical summer peak of about 55°F, Birch Lake Central Basin; Porter Township rates as "cold" for swimming. Wetsuit territory. Brief exposure is tolerable but prolonged swimming without protection risks hypothermia.
Where does this Birch Lake Central Basin; Porter Township 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 — 1,510 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.