Putnam-Fanny Lake Water Temperature
Putnam-Fanny Lake in Putnam County, Florida averages about 82°F at the surface in summer — warmest in Oct (~83°F) and coldest in Jan (~55°F). These are typical values by month, not a live reading.
Typical water temperature by month
Typical surface water temperature by month, from 12 field readings (2018–2019) via the EPA Water Quality Portal. Months with too few readings are left blank.
Is Putnam-Fanny 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? Putnam-Fanny Lake scored A on water quality — clarity, algae, phosphorus, depth, fish species, and swimming safety, all on one report card.
Water temperatures at nearby Florida lakes
Summer average ~79°F
Summer average ~88°F
Typical monthly temps
Summer average ~88°F
Summer average ~86°F
Summer average ~84°F
Explore water temperatures
Where to stay near Putnam-Fanny Lake
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Frequently asked questions
What is the water temperature of Putnam-Fanny Lake?
Putnam-Fanny Lake has a typical summer surface temperature of about 82°F. It is usually warmest in October (around 83°F) and coldest in January (around 55°F). These are typical values by month from 12 EPA Water Quality Portal field readings (2018–2019), not a live reading.
When is Putnam-Fanny Lake warmest?
Surface water at Putnam-Fanny Lake is typically warmest in October, reaching about 83°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 Putnam-Fanny Lake warm enough to swim?
At its typical summer peak of about 82°F, Putnam-Fanny 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 Putnam-Fanny 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 — 12 readings from 1 monitoring station between 2018 and 2019. 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.