Updated July 2026
Agua Caliente Spring
What this number is, and is not
90°F is the maximum surface temperature measured at the vent during the USGS/NOAA thermal springs survey (1965–1980). It is not a current reading, and the temperature of any pool downstream of a vent is almost always lower.
This page also records nothing about access. Land ownership, legal entry, trail conditions, and whether a usable pool exists are all outside this dataset. Confirm with the managing agency before setting out.
Graded lakes within 25 miles
- CPatagonia Lake · Santa Cruz County · 15.2 mi
- FPena Blanca Lake · Santa Cruz County · 21.3 mi
Nearby hot springs
- CoolMonkey Spring15.8 mi · 82°F
- WarmAgua Caliente42.7 mi · 86°F
- CoolMercer Spring46.8 mi · 77°F
- CoolN-O Spring61.3 mi · 73°F
- ScaldingHookers Hot Springs61.3 mi · 127°F
Where to stay near Agua Caliente Spring, Arizona
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Frequently Asked Questions
Agua Caliente Spring was recorded at 90°F (32°C), which classifies as Warm (86–99°F (30–37°C)). Pleasantly warm and below typical hot-tub heat. That figure is the maximum surface temperature measured at the vent during the USGS/NOAA survey between 1965–1980 — not a current reading, and not the temperature of any pool downstream of the vent.
This page classifies a temperature; it does not tell you whether a spring can be legally or safely reached. The inventory carries no information about land ownership, access, trail conditions, or whether a usable pool exists at all — many listed springs sit on private land or inside protected thermal areas where entry is prohibited. Confirm with the managing agency before setting out.
Agua Caliente Spring is in Arizona at approximately 31.6950, -110.9630. The nearest graded lake is Patagonia Lake, about 15.2 miles away. Coordinates come from the USGS/NOAA inventory and locate the vent, not a trailhead or parking area.
Source: USGS/NOAA Thermal Springs List for the United States, via PANGAEA (CC-BY-4.0). Compilation: USGS Waring 1965 / Muffler 1979 + NOAA NGDC KGRD-12 (1980).
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