Rio Del Mar Beach, Ocean beach in Santa Cruz County, US.

Rio Del Mar Beach is a beach in Santa Cruz County, California, on the Pacific coast about 3,900 km west of Washington, D.C. The area has a Mediterranean climate with an average temperature of 16 °C, ranging from about 8 °C in December to about 22 °C in September, and receives roughly 506 mm of rain per year.

The beach lies in Santa Cruz County, about 3,900 km west of Washington, D.C., on California's southwestern coast. Its Mediterranean climate averages 16 °C, with September highs near 22 °C and December lows around 8 °C, and roughly 506 mm of rain a year, heaviest in December.

Rio Del Mar Beach sits in a Mediterranean climate, with an average temperature of about 16 °C and September the warmest month at roughly 22 °C. December is the coolest, averaging 8 °C, and the area receives about 506 mm of rain a year, with December the wettest month.

Rio Del Mar Beach lies about 3,900 km west of Washington, D.C., in Santa Cruz County, California, on the Pacific coast. The climate is Mediterranean, with an average temperature of 16 °C, September the warmest month at 22 °C and December the coolest at 8 °C. Annual rainfall averages 506 mm, heaviest in December at 135 mm, and May is the driest month with 1 mm.

Aptos Creek forms a natural lagoon where it meets the Pacific Ocean during summer months, creating separate swimming zones. This seasonal feature changes the beach experience depending on when you visit.