National Weather Service Forecast for: San Martin CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 pm PDT Jun 29, 2026
 
Tonight

Tonight: Increasing clouds, with a low around 54. South wind around 5 mph becoming calm after midnight.
Increasing
Clouds
 Tuesday

Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 80. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Becoming
Sunny
 Tuesday
Night
Tuesday Night: Increasing clouds, with a low around 52. South wind 5 to 10 mph, with gusts as high as 18 mph.
Increasing
Clouds
 Wednesday

Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 74. Southwest wind 5 to 9 mph, with gusts as high as 18 mph.
Gradual
Clearing
 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 51. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 74.
Mostly Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 82.
Mostly Sunny

 Friday
Night
Friday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 53.
Mostly Clear
then Patchy
Fog
Lo 54 °F Hi 80 °F Lo 52 °F Hi 74 °F Lo 51 °F Hi 74 °F Lo 52 °F Hi 82 °F Lo 53 °F

 

Tonight
 
 Increasing clouds, with a low around 54. South wind around 5 mph becoming calm after midnight.
Tuesday
 
 Mostly cloudy through mid morning, then gradual clearing, with a high near 80. Light and variable wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
 
 Increasing clouds, with a low around 52. South wind 5 to 10 mph, with gusts as high as 18 mph.
Wednesday
 
 Cloudy through mid morning, then gradual clearing, with a high near 74. Southwest wind 5 to 9 mph, with gusts as high as 18 mph.
Wednesday Night
 
 Mostly cloudy, with a low around 51. Southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Thursday
 
 Mostly sunny, with a high near 74.
Thursday Night
 
 Partly cloudy, with a low around 52.
Friday
 
 Mostly sunny, with a high near 82.
Friday Night
 
 Patchy fog after 2am. Otherwise, mostly clear, with a low around 53.
Independence Day
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85.
Saturday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 54.
Sunday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 84.
Sunday Night
 
 Patchy fog. Otherwise, partly cloudy, with a low around 54.
Monday
 
 Mostly sunny, with a high near 83.

 

Forecast from NOAA-NWS for San Martin CA.