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Stormsurf Mobile App Create Your Own Surf Forecast Swell Calculator Swell Decay Tables Sea Height Tables Swell Category Table Convert from GMT:   0Z 1Z 2Z 3Z 4Z 5Z 6Z 7Z 8Z 9Z 10Z 11Z 12Z 13Z 14Z 15Z 16Z 17Z 18Z 19Z 20Z 21Z 22Z 23Z  to timezone: IDLE/NZST AEDT GST/AEST --> JST/AWDT CCT/AWST WAST/CXT --> MSD BT/MSK EET/CEST CET/SWT GMT/UTC WAT AT ADT AST/EDT EST/CDT CST/MDT MST/PDT PST/YDT YST/HADT AHST/HAST NT IDLW 7:00 ---

QuikCAST Surf Forecast - North California 5 Day Surf Forecast Forecast Updated:   Friday, August 15, 2025 1:39 PM Surf Scale: 3 ft = waist high, 4 ft = chest high, 5 ft = head high, 10 ft =double overhead Swell Direction is direction swell is coming from. 90°=East, 180°=South, 270°=West, 360-0 = North North California Surf Forecast (Centered on San Francisco) Day Trend Wind (kts) Details (Swell Number, Swell Size & Period, Arrival Time and Profile) Waves (Set wave max face height) Swell Direction Saturday 8/16 Down some NW 5 early Local northwest windswell 3.8 ft @ 6-7 secs early Background Complex Gale swell fading from 1.6 ft @ 13-14 secs 2.0 ft 2.0 ft 310 degrees 200 degrees Sunday 8/17 Down some NW 5 early Local northwest windswell 3.5 ft @ 9-10 secs early Background southwest swell 1.5 ft @ 14 secs 3.0 ft 2.0 ft 310 degrees 200 degrees Monday 8/18 Up barely NW 5+ early Local northwest windswell 2.7 ft @ 9-10 secs Small New Zealand background swell building to 1.2 ft @ 17 secs later 2.5 ft 2.0 ft 310 degrees 216 degrees Tuesday 8/19 Up slightly NW 5+ early Small New Zealand background swell building to 1.5 ft @ 15-16 secs later 2.0-2.5 ft 216 degrees Wednesday 8/20 Up slightly NW 5+ early Local northwest windswell 4.0 ft @ 6-7 secs later Small New Zealand Swell 1.8 ft @ 14-15 secs 2.0-2.5 ft 2.5 ft 310 degrees 212 degrees Extended Outlook Up some maybe --- Swell is fading originating from a complex gale that developed under New Zealand and over the upper reaches of the Central South Pacific Thurs-Tues (8/5). A weak gale developed under New Zealand Fri (8/8) with seas to 26 ft aimed northeast. Swell arrival on Mon (8/18). A stronger gale is developing south of the Tasman Sea Thurs-Fri (8/15) with up to 45 ft seas aimed east-southeast then tracking east into Sun (8/17) with seas fading from 33 ft. Weak energy is developing over the upper reaches of the Central South Pacific on Fri (8/15) with 31 ft seas aimed east. Possibly another gale is to develop in the far Southeast Pacific on Tues (8/19) with 35 ft seas aimed northeast. --- --- Surf Height Animation: Northeast Pacific - North CA - Central CA Wind Animations: US West Coast - North CA - Central CA Local Model: Surf - Wind 527886

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