Castaic, CA Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Castaic, CA in one place.
Mostly cloudy, with a low around 50. Southwest wind around 5 mph.
Local Weather Overview
This forecast page for Castaic, CA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 11, 2026 3:36 AM PDT.
The active forecast window currently covers Apr 11 to Apr 17, 2026 for Castaic, CA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 11 to Apr 17, 2026
- Latest sync
- Apr 11, 2026 3:36 AM PDT
- Forecast office
- LOX
- Source
- NOAA / NWS
Daily Outlook
This Week in Castaic
Friday looks like the warmest upcoming period in Castaic at 78 degrees F.
Monday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Sunday at about 10 to 20 mph SW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 11, 2026 3:36 AM PDT
- Coverage
- 7 days
- Time zone
- America/Los_Angeles
- Forecast office
- LOX
- Radar station
- KVTX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly sunny, with a high near 66. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Rain after 11pm. Mostly cloudy, with a low around 49. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Rain before 8am, then rain and a slight chance of thunderstorms between 8am and 5pm. Partly sunny, with a high near 63. Southwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Partly cloudy, with a low around 44. West southwest wind 0 to 10 mph, with gusts as high as 20 mph.
Sunny, with a high near 64.
Mostly clear, with a low around 42.
Sunny, with a high near 71.
Clear, with a low around 45.
Sunny, with a high near 73.
Partly cloudy, with a low around 49.
Mostly sunny, with a high near 73.
Mostly clear, with a low around 47.
Sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 11
|
Mostly Cloudy
|
50°F |
5 mph
SW
|
|
Saturday
Apr 11
|
Partly Sunny
|
66°F |
5 to 15 mph
SW
|
|
Saturday Night
Apr 11
|
Light Rain
|
49°F |
10 to 15 mph
SSW
|
|
Sunday
Apr 12
|
Light Rain
|
63°F |
10 to 20 mph
SW
|
|
Sunday Night
Apr 12
|
Partly Cloudy
|
44°F |
0 to 10 mph
WSW
|
|
Monday
Apr 13
|
Sunny
|
64°F |
0 to 10 mph
WNW
|
|
Monday Night
Apr 13
|
Mostly Clear
|
42°F |
0 to 10 mph
NNW
|
|
Tuesday
Apr 14
|
Sunny
|
71°F |
0 to 10 mph
WNW
|
|
Tuesday Night
Apr 14
|
Clear
|
45°F |
0 to 10 mph
NW
|
|
Wednesday
Apr 15
|
Sunny
|
73°F |
0 to 10 mph
WSW
|
|
Wednesday Night
Apr 15
|
Partly Cloudy
|
49°F |
0 to 10 mph
WNW
|
|
Thursday
Apr 16
|
Mostly Sunny
|
73°F |
0 to 10 mph
W
|
|
Thursday Night
Apr 16
|
Mostly Clear
|
47°F |
5 to 10 mph
NW
|
|
Friday
Apr 17
|
Sunny
|
78°F |
5 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Castaic.