Blue Spring temperature
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USGS 02235500
Why the temperature difference matters
Blue Spring is a warm-water refuge. The useful winter signal is not simply the spring temperature by itself, but how it compares with the colder St. Johns River. When the river cools and the spring remains stable, the refuge advantage grows.
Source boundary: Blue Spring temperature comes from USGS station 02235500. River temperature comes from the USGS St. Johns River near DeLand station 02236000, used transparently as the operational river proxy.
The full Blue Spring tool combines this water signal with NWS weather, the latest published manatee information, multi-day outlook and park planning.