National Weather Service Forecast for: San Martin CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 11:26 am PDT May 4, 2026
 
Today

Today: Mostly sunny, with a high near 67. West southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Mostly Sunny

Tonight

Tonight: A 30 percent chance of rain, mainly after 2am.  Patchy fog after 4am.  Otherwise, mostly cloudy, with a low around 48. West wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 18 mph.
Mostly Cloudy
then Chance
Rain and
Patchy Fog
Tuesday

Tuesday: Areas of fog before 10am.  Otherwise, mostly cloudy, with a high near 67. Calm wind becoming west 5 to 9 mph in the afternoon.
Areas Fog
then Partly
Sunny
Tuesday
Night
Tuesday Night: Patchy fog after 2am.  Otherwise, mostly cloudy, with a low around 50. West southwest wind 5 to 9 mph becoming calm  in the evening. Winds could gust as high as 18 mph.
Mostly Cloudy
then Patchy
Fog
Wednesday

Wednesday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 77. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Areas Fog
then Sunny

Wednesday
Night
Wednesday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 50.
Mostly Clear
then Patchy
Fog
Thursday

Thursday: Areas of fog before 9am.  Otherwise, sunny, with a high near 81.
Areas Fog
then Sunny

Thursday
Night
Thursday Night: Patchy fog after 5am.  Otherwise, mostly clear, with a low around 48.
Clear then
Patchy Fog

Friday

Friday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 80.
Patchy Fog
then Sunny

Hi 67 °F Lo 48 °F Hi 67 °F Lo 50 °F Hi 77 °F Lo 50 °F Hi 81 °F Lo 48 °F Hi 80 °F

 

Today
 
Mostly sunny, with a high near 67. West southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Tonight
 
A 30 percent chance of rain, mainly after 2am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 48. West wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Tuesday
 
Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 67. Calm wind becoming west 5 to 9 mph in the afternoon.
Tuesday Night
 
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 50. West southwest wind 5 to 9 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Wednesday
 
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 77. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
 
Patchy fog after 2am. Otherwise, mostly clear, with a low around 50.
Thursday
 
Areas of fog before 9am. Otherwise, sunny, with a high near 81.
Thursday Night
 
Patchy fog after 5am. Otherwise, mostly clear, with a low around 48.
Friday
 
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80.
Friday Night
 
Patchy fog after 4am. Otherwise, clear, with a low around 49.
Saturday
 
Sunny, with a high near 87.
Saturday Night
 
Clear, with a low around 54.
Sunday
 
Sunny, with a high near 92.

 

Forecast from NOAA-NWS for San Martin CA.