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Every Hot Spring

Los Guilicos Warm Springs

Los Guilicos Warm Springs is a geothermal spring in Sonoma County, California. Water at the source is recorded at 88°F (31°C).

88°F31°C recorded at the source
Warm: pleasant on a hot day, cool in winter.

Facts

Coordinates
38.3947, -122.5511 (Google Maps, OSM)
Source temperature
88°F (31°C)
Access
Unknown
Type
Unknown
Fee
Not recorded
Clothing optional
Not recorded
Nearest town
Not recorded
Data sources
NOAA NCEI, Wikidata. See sources

Map

Larger marker is Los Guilicos Warm Springs; smaller markers are other springs within 50 miles.

Quick answers

How hot is Los Guilicos Warm Springs?
The hottest recorded reading at the source is 88°F (31°C). That is the outlet temperature, not a pool temperature; water cools as it flows away from the source.
Where is Los Guilicos Warm Springs?
Los Guilicos Warm Springs is in Sonoma County, California, at coordinates 38.3947, -122.5511.
What other hot springs are near Los Guilicos Warm Springs?
The closest listed springs, in straight-line distance, are White Sulphur Springs, 7 mi; St Helena White Sulphur Spring, 7 mi; and Calistoga Spa Hot Springs, 13 mi.

Before you go

  • Temperatures are measured at the source and can be far hotter than any soaking pool. Test with a hand before stepping in.
  • Access, fees, and road conditions change. Verify with the land manager or owner; "public" here reflects survey records, not a current right of entry.
  • Water in natural springs is untreated. Keep your head above water and avoid soaking with open wounds. Some springs carry Naegleria fowleri risk.
  • Pack out everything, including soap residue. Many springs have been closed because of trash and overcrowding.

Sources

Dataset last rebuilt October 11, 2026. Not yet checked on site by a person. Access, fee, clothing and closure details appear only when a source below states them. How this data is built.

Merged from

  1. NOAA NCEI Thermal Springs List (archived 2025): survey location and source temperature, public domain
  2. Wikidata: name, county and website, CC0