San Carlos, CA Weather & Growing Conditions
This Afternoon
79°F
Sunny
Sunny. High near 79, with temperatures falling to around 74 in the afternoon. West wind around 13 mph, with gusts as high as 18 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 13 mph W | 0% |
| Tonight | 56°F | Partly Cloudy | 3 to 12 mph WSW | 1% |
| Sunday | 71°F | Mostly Cloudy | 3 to 9 mph WSW | 1% |
| Sunday Night | 57°F | Mostly Cloudy | 2 to 9 mph WSW | 3% |
| Monday | 73°F | Mostly Sunny | 2 to 9 mph WSW | 2% |
| Monday Night | 56°F | Partly Cloudy | 2 to 9 mph WSW | 2% |
| Tuesday | 75°F | Mostly Sunny | 2 to 9 mph WSW | 1% |
| Tuesday Night | 56°F | Mostly Clear | 1 to 9 mph WSW | 0% |
| Wednesday | 84°F | Sunny | 1 to 9 mph W | 0% |
| Wednesday Night | 60°F | Mostly Clear | 0 to 9 mph W | 0% |
| Thursday | 87°F | Sunny | 0 to 10 mph WNW | 0% |
| Thursday Night | 60°F | Mostly Clear | 2 to 10 mph W | 0% |
| Friday | 81°F | Sunny | 2 to 12 mph W | 0% |
| Friday Night | 57°F | Mostly Clear | 2 to 12 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Carlos, CA
Last spring frost
Jan 17
First fall frost
Dec 12
Growing season
333 days
Hardiness zone
10a
Explore more for San Carlos, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Redwood City, Ca (2.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.