National Weather Service Forecast for: San Martin CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:27 am PDT Oct 6, 2026
 
This
Afternoon
This Afternoon: Sunny and hot, with a high near 101. Calm wind becoming northwest 5 to 7 mph.
Hot
 Tonight

Tonight: Clear, with a low around 63. Calm wind becoming northwest 5 to 7 mph in the evening.
Clear
 Wednesday

Wednesday: Sunny and hot, with a high near 102. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Hot
 Wednesday
Night
Wednesday Night: Clear, with a low around 61. North wind 3 to 7 mph.
Clear
 Thursday

Thursday: Sunny and hot, with a high near 98. Light and variable wind.
Hot
 Thursday
Night
Thursday Night: Mostly clear, with a low around 56.
Mostly Clear
 Friday

Friday: Sunny, with a high near 87.
Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 54.
Mostly Clear
 Saturday

Saturday: Mostly sunny, with a high near 76.
Mostly Sunny
Hi 101 °F Lo 63 °F Hi 102 °F Lo 61 °F Hi 98 °F Lo 56 °F Hi 87 °F Lo 54 °F Hi 76 °F

Heat Advisory
 

This Afternoon
 
 Sunny and hot, with a high near 101. Calm wind becoming northwest 5 to 7 mph.
Tonight
 
 Clear, with a low around 63. Calm wind becoming northwest 5 to 7 mph in the evening.
Wednesday
 
 Sunny and hot, with a high near 102. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 61. North wind 3 to 7 mph.
Thursday
 
 Sunny and hot, with a high near 98. Light and variable wind.
Thursday Night
 
 Mostly clear, with a low around 56.
Friday
 
 Sunny, with a high near 87.
Friday Night
 
 Mostly clear, with a low around 54.
Saturday
 
 Mostly sunny, with a high near 76.
Saturday Night
 
 Mostly clear, with a low around 47.
Sunday
 
 Mostly sunny, with a high near 74.
Sunday Night
 
 Mostly clear, with a low around 48.
Columbus Day
 
 Sunny, with a high near 75.

 

Forecast from NOAA-NWS for San Martin CA.