A local trick
SoCal's microclimates are your friend on a hot day: the coast and the mountains can run 20–30°F coolerthan the inland valleys at the same moment. When it's 100°F in the Inland Empire, it might be 75°F at the beach — so sometimes the best move is just to drive toward the water.
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Frequently asked questions
What can we do in SoCal when it's too hot outside?
Cool off at a splash pad or public pool, head to a breezy beach, or step into an air-conditioned museum or indoor playground. In a heat wave, the coast and the mountains both run far cooler than the inland valleys — sometimes 20–30°F cooler — so a short drive can change your whole day.
Where is it coolest in Southern California on a hot day?
The coast (beaches from Santa Monica to San Diego) is reliably cooler thanks to the ocean breeze, and the mountains (Big Bear, Idyllwild) are cooler still. Inland valleys and the desert are the hottest, so plan water or air-conditioned activities there.
Are splash pads free?
Most city splash pads are free, which makes them a perfect hot-day default. See our splash pads guide for the ones nearest you.