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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

WhenTempForecastWindPrecip
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

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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.