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

Nearby towns & communities

Arroyo Grande Atascadero Avila Beach Blacklake California Polytechnic State University Callender Cambria Cayucos Creston Edna El Paso de Robles (Paso Robles) Garden Farms Grover Beach Los Berros Los Osos Los Ranchos Morro Bay Nipomo Oceano Pismo Beach San Luis Obispo San Miguel Santa Margarita Shandon Templeton Whitley Gardens Woodlands

All California locations ›

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.