Vallejo White Sulphur Springs

Solano County, California · Near Vallejo
38.1250°N, 122.1880°W · 375 ft
68°F 58°F air · Good soaking weather 375 ft Roadside
Aerial view of the ground around Vallejo White Sulphur Springs LiDAR bare-earth view of the same ground around Vallejo White Sulphur Springs
Aerial LiDAR bare earth

Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.

Vallejo White Sulphur Springs is a named spring on the edge of Vallejo in Solano County, less than three miles from town. The water on file is 68 degrees, which is cool tap water, so the sulphur in the name is the point here. Any bathing history is not on record. Who owns the ground is unrecorded.

Location

It is a roadside spring, about a hundred feet off an unnamed road, at low elevation. The climate is mild bay weather, twenty inches of rain in winter and none of it falling as snow. No land unit or manager is listed, and the record does not describe what stands around the outlet.

Winter months are what the record lists as best, which for a spring this cool means the contrast with cold air. No campground is on file within reach. No fee is recorded, and access is blank too, so take a look from the road and ask before walking onto anything that looks private. The temperature is a single reading with no sample date attached.

Terrain

Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Vallejo White Sulphur Springs.

Setting
Hillside
The spring sits on a steep slope that climbs to the northeast.
Highest ground nearby
273 ft above the spring
Within a quarter mile, to the northeast
Cross-section through the spring

A slice through the ground from southwest to northeast, about 0.6 miles end to end.

Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.

Heat Below
136 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 86% of the springs on this site.

Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.

Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.

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
58°F
Clear SW 49.9 mph 85% Good soaking weather
Tuesday 75° Low 55° Sunny
Wednesday 70° Low 55° Mostly Sunny 2% precip
Thursday 74° Low 55° Mostly Sunny
Friday 78° Low 55° Mostly Sunny
Saturday 75° Low 55° Mostly Sunny
Temperature
68°F
Warm Hot Boiling
Water Temp 68°F (20°C)
Avg Air Temp 59°F
Above Ambient +9°F
Mild soaking conditions September
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).