National Weather Service Forecast for: San Martin CA
Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: 1:26 am PDT Jun 22, 2026
 
Overnight

Overnight: Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 53. Calm wind.
Patchy Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 85. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Increasing clouds, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening.
Increasing
Clouds
 Tuesday

Tuesday: Partly sunny, then gradually becoming sunny, with a high near 87. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Becoming
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening.
Mostly Clear
 Wednesday

Wednesday: Sunny, with a high near 88.
Sunny
 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 54.
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 85.
Sunny
 Thursday
Night
Thursday Night: Mostly clear, with a low around 53.
Mostly Clear
Lo 53 °F Hi 85 °F Lo 54 °F Hi 87 °F Lo 54 °F Hi 88 °F Lo 54 °F Hi 85 °F Lo 53 °F

 

Overnight
 
 Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 53. Calm wind.
Monday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 85. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Monday Night
 
 Increasing clouds, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
 
 Partly sunny, then gradually becoming sunny, with a high near 87. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Tuesday Night
 
 Mostly clear, with a low around 54. South southwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
 
 Sunny, with a high near 88.
Wednesday Night
 
 Mostly clear, with a low around 54.
Thursday
 
 Sunny, with a high near 85.
Thursday Night
 
 Mostly clear, with a low around 53.
Friday
 
 Patchy fog before 7am. Otherwise, mostly sunny, with a high near 81.
Friday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 55.
Saturday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 79.
Saturday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 52.
Sunday
 
 Patchy fog. Otherwise, mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for San Martin CA.