If you planning to travel to Castaic Lake, Castaic, California, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 2:32 PM. The temperature feels like 53.5 with a humidity level of 27 so dress accordingly. Cloud coverage is 9 percent with visibility at 14.9 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling east at a speed of 4 MPH. At the end of the day don’t miss the sunset at 12:46 AM.