Topanga, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topanga, a community in Los Angeles County, California.
Overnight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. Southeast wind around 0 mph.
7-day forecast for Topanga
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Partly Cloudy | 0 mph | 0% |
| Tuesday | 80°F | Sunny | 0 to 10 mph S | 0% |
| Tuesday Night | 53°F | Mostly Clear | 0 to 5 mph SSE | 0% |
| Wednesday | 81°F | Sunny | 0 to 10 mph SSW | 0% |
| Wednesday Night | 55°F | Mostly Clear | 0 to 10 mph S | 0% |
| Thursday | 81°F | Sunny | 0 to 5 mph S | 0% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph SSE | 0% |
| Friday | 89°F | Sunny | 0 to 5 mph SSE | 0% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 0% |
| Saturday | 89°F | Sunny | 0 to 5 mph SSE | 0% |
| Saturday Night | 65°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Sunday | 88°F | Sunny | 0 to 5 mph SSE | 0% |
| Sunday Night | 64°F | Mostly Clear | 0 to 5 mph SSE | 0% |
| Monday | 86°F | Sunny | 0 to 5 mph SSE | 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 Aug 4, 2026.