Vallejo White Sulphur Springs

Solano County, California · Near Vallejo
38.1250°N, 122.1880°W · 375 ft
68°F 375 ft Roadside

Vallejo White Sulphur Springs flows at 68 degrees just 104 feet from the nearest road in the San Francisco Bay Area, making it one of California's most accessible thermal features despite its low mineral content and subtle warmth.

Location

The spring emerges at only 375 feet elevation near Vallejo where coastal fog influences the climate. A roadside setting means easy access but limited solitude, with the thermal feature emerging in an area where urban development meets the bay's influence.

Located immediately adjacent to a road, this spring offers maximum accessibility for those with limited mobility or time. The 68-degree water is warm but not hot, making it more comfortable for prolonged immersion. The mild Bay Area climate allows year-round visits.

History of Vallejo White Sulphur Springs

The spring belongs to a network of mineral springs scattered throughout the Bay Area, products of the region's complex geology and proximity to major fault systems. Historical use by indigenous peoples and later visitors established its modest reputation among regional thermal features.

Monthly Climate
48°
Jan
51°
Feb
53°
Mar
58°
Apr
61°
May
66°
Jun
67°
Jul
67°
Aug
67°
Sep
64°
Oct
54°
Nov
48°
Dec
Annual Precip: 19.6 in Annual Snow: 0.0 in
Best Time to Visit
January Air 48°F · Water 68°F · +20° contrast
December Air 48°F · Water 68°F · +20° contrast
February Air 51°F · Water 68°F · +17° contrast
January offers 19°F more contrast than September
Current Conditions
54°F
Clear SW 58.0 mph 90% Good soaking weather
Thursday 71° Low 51° Mostly Sunny
Friday 73° Low 50° Mostly Sunny
Saturday 78° Low 51° Sunny
Sunday 78° Low 52° Mostly Sunny
Monday 88° Low 53° Mostly Sunny
Where to Stay

Some links are affiliate links. We may earn a commission at no extra cost to you.

Temperature
68°F
Warm Hot Boiling
Water Temp 68°F (20°C)
Avg Air Temp 59°F
Above Ambient +9°F
Mild soaking conditions May
Access
Road Access Roadside
Distance to Road 104 ft
Frequently Asked Questions
What is the water temperature at Vallejo White Sulphur Springs?
Vallejo White Sulphur Springs has a water temperature of 68°F (20°C). This is a warm thermal spring.
Where is Vallejo White Sulphur Springs located?
Vallejo White Sulphur Springs is located in Solano County, California at 375 feet elevation, near Vallejo. Coordinates: 38.1250°N, 122.1880°W.
How do I get to Vallejo White Sulphur Springs?
Vallejo White Sulphur Springs has Roadside road access (104 ft from the road).
Is it safe to soak at Vallejo White Sulphur Springs?
Vallejo White Sulphur Springs is generally safe for soaking at its recorded temperature. Access may be on private land or unconfirmed — verify current conditions before visiting. Always tell someone your plans before visiting remote hot springs.
Is Vallejo White Sulphur Springs crowded?
Vallejo White Sulphur Springs is accessible from a paved road, making it easy to reach. Weekends and holidays may be busier — consider visiting on a weekday for a quieter experience.
What should I bring to Vallejo White Sulphur Springs?
Essentials for Vallejo White Sulphur Springs: swimsuit, towel, water bottle, a trash bag to pack out what you pack in.