San Simeon, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Simeon, a community in San Luis Obispo County, California.
Tonight
53°F
Patchy Fog
Patchy fog after 11pm. Mostly cloudy, with a low around 53. Northwest wind 5 to 10 mph.
7-day forecast for San Simeon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Patchy Fog | 5 to 10 mph NW | 0% |
| Saturday | 80°F | Patchy Fog | 5 to 15 mph WNW | 1% |
| Saturday Night | 54°F | Patchy Fog | 5 to 10 mph NW | 0% |
| Sunday | 76°F | Patchy Fog then Partly Sunny | 5 to 10 mph NW | 2% |
| Sunday Night | 53°F | Patchy Fog | 5 to 10 mph NW | 3% |
| Monday | 72°F | Patchy Fog then Mostly Sunny | 5 to 10 mph WNW | 0% |
| Monday Night | 54°F | Partly Cloudy | 0 to 10 mph NW | 0% |
| Tuesday | 71°F | Sunny | 0 to 10 mph NW | 0% |
| Tuesday Night | 58°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Wednesday | 81°F | Sunny | 0 to 5 mph NNW | 0% |
| Wednesday Night | 62°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Thursday | 79°F | Mostly Sunny | 0 to 5 mph WSW | 0% |
| Thursday Night | 61°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Friday | 76°F | Mostly Sunny | 0 to 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Simeon (35.618, -121.137). Updated through the day.
Growing snapshot for San Simeon
Last spring frost
Feb 13
First fall frost
Feb 1
Growing season
365 days
Hardiness zone
10a
More local growing data for San Simeon: nearby ZIP 93428 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Hearst Castle, Ca (9.9 mi from San Simeon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.