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.

This Afternoon

80°F

Mostly Sunny

Mostly sunny, with a high near 80. West northwest wind 10 to 15 mph.

7-day forecast for San Simeon

When	Temp	Forecast	Wind	Precip
This Afternoon	80°F	Mostly Sunny	10 to 15 mph WNW	1%
Tonight	54°F	Mostly Cloudy	5 to 10 mph NW	0%
Sunday	78°F	Mostly Cloudy	5 to 10 mph WNW	1%
Sunday Night	53°F	Patchy Fog	5 to 10 mph NW	2%
Monday	73°F	Patchy Fog then Partly Sunny	5 to 10 mph WNW	1%
Monday Night	52°F	Patchy Fog	5 to 10 mph NW	0%
Tuesday	73°F	Patchy Fog then Mostly Sunny	5 to 10 mph WNW	0%
Tuesday Night	57°F	Partly Cloudy	0 to 10 mph NW	0%
Wednesday	80°F	Sunny	0 to 10 mph NW	0%
Wednesday Night	62°F	Partly Cloudy	0 to 5 mph NNW	0%
Thursday	80°F	Mostly Sunny	0 to 5 mph SW	0%
Thursday Night	61°F	Partly Cloudy	0 to 5 mph NW	1%
Friday	75°F	Mostly Sunny	0 to 5 mph WSW	1%
Friday Night	58°F	Partly Cloudy	0 to 5 mph NW	1%

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

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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 20, 2026.