Agua Caliente Look only

Agua Caliente reads 86°F at the source (NCEI, historical reading). Managed by the Pima County Natural Resources, Parks and Recreation (checked 2026-08-19).

Cool Warm Hot Boiling-class 86°F

86°F / 30°C

Warm range at the source — bath-warm

Reading from the NCEI Thermal Springs List (historical reading, 1981 compilation). Source temperature — lower pools usually run cooler.

Water temperatures change with flow and season — test before entering, and never submerge your head in warm natural water. CDC guidance on Naegleria fowleri.

The rule here

This is a thermal feature to see, not a place to get in the water. The Pima County Natural Resources, Parks and Recreation puts it this way:

“No fishing, no wading or swimming, do not climb trees”

— Pima County Natural Resources, Parks and Recreation, checked 2026-08-19

Worth knowing: Roy P. Drachman Agua Caliente Regional Park, open sunrise to sunset. The County describes the site as “a unique 101-acre park that features a perennial warm spring and pond that is home to an exceptionally rich mix of plants and animals,” and notes the pond has in recent years been maintained with water pumped from a well on the property.

Nearby springs

Identity, coordinates, and temperature quoted from the NCEI Thermal Springs List (historical reading, 1981 compilation).