* WHAT...South swell from 190 degrees with a period of 15 to 16 seconds will generate surf of 4 to 6 feet with sets up to 8 feet along south-facing beaches. High rip current risk. * WHERE...San Diego County Coastal Areas and Orange County Coastal Areas. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Hazardous swimming conditions with high rip current and longshore current risk. If you become caught in a rip current, yell for help. Remain calm and do not exhaust yourself and stay afloat while waiting for help. If you have to swim out of a rip current, SWIM PARALLEL TO SHORE and back toward the beach when possible. Do not attempt to swim directly against a rip current as you will tire quickly. * ADDITIONAL DETAILS...Swell and surf will gradually subside beginning Thursday with a shorter period, but will remain elevated into Friday.