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Castaic Lake, CA Weather Forecast
Castaic Lake, CA Weather Forecast Date: 202 PM PDT Mon Aug 10 2026
The area/counties/county of: Santa Clarita Valley, including: Lake Castaic, Newhall, Santa Clarita, and Valencia.or toggle through each period.
Tonight... Mostly cloudy in the evening then partly cloudy. Lows in the lower to mid 60s. South winds 10 to 20 mph in the evening.
Tuesday... Partly cloudy. Highs in the upper 80s to mid 90s. Southwest winds 10 to 20 mph in the afternoon.
Tuesday Night... Mostly clear in the evening then partly cloudy. Lows in the lower 60s. Southwest winds 10 to 20 mph in the evening.
Wednesday... Partly cloudy. Highs in the mid 80s. Southwest winds 15 to 25 mph in the afternoon.
Wednesday Night... Partly cloudy. Lows in the mid 50s to around 60. Southwest winds 10 to 20 mph in the evening.
Thursday... Areas of low clouds and fog in the morning then partly cloudy. Highs in the upper 70s to mid 80s.
Thursday Night... Mostly clear in the evening then partly cloudy. Lows in the mid 50s.
Friday... Partly cloudy. Highs in the upper 70s to mid 80s.
Friday Night... Mostly clear. Lows in the mid 50s.
Saturday... Sunny. Highs in the mid 80s.
Saturday Night... Mostly clear. Lows around 60.
Sunday... Partly cloudy. Highs in the mid to upper 80s.
Sunday Night... Mostly clear. Lows around 60.
POP = Probability of Precipitation
Castaic Lake Radar Loop
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