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Castaic Lagoon, CA Weather Forecast
Castaic Lagoon, CA Weather Forecast Date: 1129 AM PDT Fri Sep 25 2026
The area/counties/county of: Santa Clarita Valley, including: Lake Castaic, Newhall, Santa Clarita, and Valencia.or toggle through each period.
Today... Sunny. Highs in the upper 80s to mid 90s. Southwest winds 10 to 20 mph in the afternoon.
Tonight... Mostly clear in the evening then partly cloudy. Lows in the mid 50s to mid 60s.
Saturday... Mostly cloudy. Highs in the upper 80s to mid 90s. Southwest winds 10 to 20 mph in the afternoon.
Saturday Night... Mostly cloudy. Lows in the mid 50s to lower 60s.
Sunday... Sunny. Highs in the lower to mid 80s. Southwest winds 10 to 20 mph in the afternoon.
Sunday Night... Mostly clear. Lows in the upper 40s to mid 50s.
Monday... Sunny. Highs in the upper 70s to mid 80s.
Monday Night... Clear. Lows in the mid 50s to around 60.
Tuesday... Sunny. Highs in the mid to upper 80s.
Tuesday Night... Clear. Lows around 60.
Wednesday... Sunny. Highs around 90.
Wednesday Night... Clear. Lows in the lower 60s.
POP = Probability of Precipitation
Castaic Lagoon Radar Loop
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