Weather forecast for: San Marcos CA
Last Update: 11:57 pm PDT Aug 7, 2026
Today: Patchy dense fog before 8am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 86. Light northwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tonight: Patchy dense fog after 2am. Otherwise, increasing clouds, with a low around 67. West wind around 5 mph becoming calm in the evening.
Sunday: Patchy dense fog before 11am. Otherwise, mostly sunny, with a high near 86. Light northwest wind becoming west 5 to 10 mph in the morning.
Sunday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.
Monday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 84. Light west wind increasing to 5 to 10 mph in the morning.
Monday Night: Increasing clouds, with a low around 66.
Tuesday: Partly sunny, with a high near 83.
Tuesday Night: Partly cloudy, with a low around 66.
Wednesday: Mostly sunny, with a high near 82.
Wednesday Night: Mostly clear, with a low around 65.
Thursday: Mostly sunny, with a high near 79.
Thursday Night: Increasing clouds, with a low around 64.
Friday: Mostly cloudy, then gradually becoming sunny, with a high near 80.
WeatherWorld.com
City of San Marcos, CA
