Alameda Warm Springs

Santa Clara County, California · Near Milpitas
37.5030°N, 121.9040°W · 465 ft
80°F 57°F air · Good soaking weather 465 ft Open Short Walk CITY

Alameda Warm Springs lies inside Mission Peak Regional Preserve, about five miles from Milpitas in Santa Clara County. A warm spring on park land close to a city. The water is around eighty degrees, warm on the skin and not a soak in any hot-spring sense. Access is listed as open and the land is city-owned preserve, which leaves nothing between you and it except a few hundred feet of walking.

Location

Under five hundred feet of elevation, a few hundred feet of walking from the nearest road, on preserve land owned by a city. Snow does not fall here. Rain is about twenty inches a year. Mission Peak Regional Preserve is the land unit; fee and campground are both blank. Open access on managed park land is the main thing the record establishes.

Winter scores highest on the climate numbers, though with no snow and a mild year the spring is reachable in any season. Camping is not part of the picture; this is a day visit from the city. Nothing is charged, as far as the record shows. The water is warm, no more than that.

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 Alameda Warm Springs.

Aerial view of the ground around Alameda Warm Springs LiDAR bare-earth view of the same ground around Alameda Warm 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.

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

A slice through the ground from west to east, about 0.6 miles end to end.

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

Heat Below
109 milliwatts per square meter of heat flow

That's about 1½ times the US average of 65. It's higher than at 59% 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
50°
Jan
52°
Feb
54°
Mar
57°
Apr
60°
May
67°
Jun
70°
Jul
70°
Aug
69°
Sep
65°
Oct
56°
Nov
50°
Dec
Annual Precip: 19.8 in Annual Snow: 0.1 in
Best Time to Visit
January Air 50°F · Water 80°F · +30° contrast
December Air 50°F · Water 80°F · +30° contrast
February Air 52°F · Water 80°F · +28° contrast
January offers 20°F more contrast than August
Current Conditions
57°F
Clear N 0.0 mph 88% Good soaking weather
Tuesday 77° Low 53° Sunny
Spring is +3° warmer
Wednesday 72° Low 53° Sunny
Spring is +8° warmer
Thursday 75° Low 53° Mostly Sunny
Spring is +5° warmer
Friday 78° Low 55° Areas Of Fog then Sunny
Spring is +2° warmer
Saturday 76° Low 55° Patchy Fog then Mostly Sunny 1% precip
Spring is +4° warmer
Where to Stay

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Temperature
80°F
Warm Hot Boiling
Water Temp 80°F (27°C)
Avg Air Temp 60°F
Above Ambient +20°F
Mild soaking conditions September
Access
Open
Road Access Short Walk
Distance to Road 439 ft
Land
Ownership Local
Agency CITY
Designation LCA
Unit Mission Peak Regional Preserve
Manager REG
Protection 2 - Permanent protection, some use allowed
Frequently Asked Questions
What is the water temperature at Alameda Warm Springs?
Alameda Warm Springs has a water temperature of 80°F (27°C). This is a warm thermal spring.
Where is Alameda Warm Springs located?
Alameda Warm Springs is located in Santa Clara County, California at 465 feet elevation, near Milpitas. Coordinates: 37.5030°N, 121.9040°W.
How do I get to Alameda Warm Springs?
Alameda Warm Springs has Short Walk road access (439 ft from the road).
Is Alameda Warm Springs free to visit?
Alameda Warm Springs has Open access. It is managed by CITY.