Myrtle Lake Water Temperature
Myrtle Lake in Seminole County, Florida typically sits around 87°F at the surface in August — warmest in Jul (~87°F) and coldest in Jan (~63°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 84 field readings (2010–2025) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Myrtle Lake warm enough to swim?
Very comfortable for swimming. Warm surface water can also favor blue-green algae in nutrient-rich lakes, so check for advisories before you go in.
Want more than temperature? Myrtle Lake water quality: clarity, algae, phosphorus, depth, fish species, and current advisories, all on one page.
Water temperatures at nearby Florida lakes
Summer average ~87°F
Summer average ~84°F
Typical monthly temps
Summer average ~86°F
Summer average ~89°F
Summer average ~88°F
Explore water temperatures
Where to stay near Myrtle Lake
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Frequently asked questions
What is the water temperature of Myrtle Lake?
Myrtle Lake typically sits around 87°F at the surface in August, from 84 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
When is Myrtle Lake warmest?
Surface water at Myrtle Lake is typically warmest in July, reaching about 87°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 Myrtle Lake warm enough to swim?
At its typical summer peak of about 87°F, Myrtle Lake rates as "warm" for swimming. Very comfortable for swimming. Warm surface water can also favor blue-green algae in nutrient-rich lakes, so check for advisories before you go in.
Where does this Myrtle 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 — 84 readings from 5 monitoring stations between 2010 and 2025. 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.