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 19, 2026
 
Tonight

Tonight: Patchy fog after 5am. Otherwise, increasing clouds, with a low around 54. Southwest wind 5 to 9 mph becoming calm in the evening.
Partly Cloudy
then Patchy
Fog
 Saturday

Saturday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Patchy Fog
then Sunny
 Saturday
Night
Saturday Night: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 52. Southwest wind 5 to 9 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Sunday

Sunday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Patchy Fog
then Sunny
 Sunday
Night
Sunday Night: Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 52. West southwest wind 5 to 9 mph becoming calm in the evening.
Mostly Clear
then Patchy
Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 54.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny, with a high near 88.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 55.
Mostly Clear
Lo 54 °F Hi 78 °F Lo 52 °F Hi 83 °F Lo 52 °F Hi 85 °F Lo 54 °F Hi 88 °F Lo 55 °F

 

Tonight
 
 Patchy fog after 5am. Otherwise, increasing clouds, with a low around 54. Southwest wind 5 to 9 mph becoming calm in the evening.
Saturday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 78. Calm wind becoming southwest 5 to 9 mph in the afternoon.
Saturday Night
 
 Patchy fog after 4am. Otherwise, increasing clouds, with a low around 52. Southwest wind 5 to 9 mph becoming calm in the evening.
Sunday
 
 Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 83. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Sunday Night
 
 Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 52. West southwest wind 5 to 9 mph becoming calm in the evening.
Monday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85.
Monday Night
 
 Mostly clear, with a low around 54.
Tuesday
 
 Mostly sunny, with a high near 88.
Tuesday Night
 
 Mostly clear, with a low around 55.
Wednesday
 
 Sunny, with a high near 90.
Wednesday Night
 
 Mostly clear, with a low around 55.
Thursday
 
 Sunny, with a high near 88.
Thursday Night
 
 Patchy fog. Otherwise, mostly clear, with a low around 54.
Friday
 
 Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for San Martin CA.