Topanga, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topanga, a community in Los Angeles County, California.
This Afternoon
72°F
Mostly Sunny
Mostly sunny, with a high near 72. West southwest wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Topanga
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Sunny | 10 mph WSW | 0% |
| Tonight | 51°F | Clear | 5 to 10 mph NW | 0% |
| Wednesday | 73°F | Sunny | 5 to 10 mph NW | 0% |
| Wednesday Night | 54°F | Mostly Clear | 5 to 10 mph N | 0% |
| Thursday | 77°F | Sunny | 5 to 15 mph N | 0% |
| Thursday Night | 57°F | Mostly Clear | 5 to 15 mph NW | 0% |
| Friday | 82°F | Sunny | 5 to 15 mph N | 0% |
| Friday Night | 60°F | Clear | 5 to 15 mph N | 0% |
| Saturday | 82°F | Sunny | 5 to 15 mph N | 0% |
| Saturday Night | 60°F | Clear | 5 to 15 mph NNW | 0% |
| Sunday | 82°F | Sunny | 0 to 10 mph NNW | 0% |
| Sunday Night | 63°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Monday | 80°F | Mostly Sunny | 0 to 5 mph ENE | 0% |
| Monday Night | 62°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Topanga (34.097, -118.606). Updated through the day.
Growing snapshot for Topanga
Last spring frost
Jan 24
First fall frost
Dec 15
Growing season
329 days
Hardiness zone
10b
More local growing data for Topanga: nearby ZIP 90290 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Woodland Hills Pierce College, Ca (5.7 mi from Topanga). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.