Los Osos, CA Weather & Growing Conditions
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. Northwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 15 mph NW | 1% |
| Tonight | 55°F | Partly Cloudy | 5 to 15 mph NW | 1% |
| Saturday | 75°F | Mostly Sunny then Patchy Fog | 10 to 15 mph NW | 1% |
| Saturday Night | 56°F | Patchy Fog | 5 to 10 mph NNW | 0% |
| Sunday | 72°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NW | 2% |
| Sunday Night | 56°F | Patchy Fog | 5 to 10 mph NW | 3% |
| Monday | 69°F | Patchy Fog then Mostly Sunny | 5 to 15 mph NW | 1% |
| Monday Night | 56°F | Mostly Cloudy | 5 to 10 mph NW | 1% |
| Tuesday | 70°F | Mostly Sunny | 5 to 10 mph NW | 0% |
| Tuesday Night | 58°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Wednesday | 79°F | Sunny | 5 to 10 mph WNW | 0% |
| Wednesday Night | 62°F | Partly Cloudy | 5 mph NNW | 0% |
| Thursday | 79°F | Mostly Sunny | 0 to 5 mph WSW | 0% |
| Thursday Night | 62°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Los Osos, CA
Last spring frost
Jan 19
First fall frost
Jan 14
Growing season
365 days
Hardiness zone
10a
Explore more for Los Osos, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Morro Bay Fire Dept, Ca (5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.