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
76°F
Sunny
Sunny, with a high near 76. West wind around 10 mph.
7-day forecast for Topanga
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Sunny | 10 mph W | 0% |
| Tonight | 52°F | Mostly Clear | 5 to 10 mph N | 0% |
| Saturday | 80°F | Sunny | 0 to 10 mph S | 0% |
| Saturday Night | 52°F | Mostly Cloudy then Patchy Fog | 5 mph SSE | 2% |
| Sunday | 77°F | Patchy Fog then Partly Sunny | 5 to 10 mph SSE | 0% |
| Sunday Night | 50°F | Mostly Cloudy | 0 to 5 mph SE | 1% |
| Monday | 74°F | Mostly Sunny | 5 to 10 mph SSE | 0% |
| Monday Night | 59°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 75°F | Sunny | 0 to 5 mph S | 0% |
| Tuesday Night | 61°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Wednesday | 84°F | Sunny | 0 to 5 mph SW | 1% |
| Wednesday Night | 64°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Thursday | 85°F | Sunny | 0 to 5 mph S | 1% |
| Thursday Night | 65°F | Mostly Clear | 0 to 5 mph S | 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 Sep 19, 2026.