A long-period S/SSW groundswell (Hurricane Genevieve, per Wavecast) is holding at 12.5–15.4s @ 188–199° — square in Tippers' prime window, where long period lines the reef into long rights instead of closing out like Ponto's straight bars can. Dawn is dead calm through 9am, sea breeze doesn't fill until ~10am. Tide sits at a −0.26ft low at 5:09am, incoming through the session. Chris is off tomorrow — full dawn window is open, no shift compromise needed.
Data from evening-surf-call run, pulled Thu Jul 30 ~7:10pm PT · buoys + NOAA tides + NWS + Open-Meteo + Wavecast (Thu 7/30 6:00am post). Surfline not checked (no browser access in automated runs).
Tippers and Blacks both clear all four factors this swell — optimal S angle, 12.5–15.4s period, calm dawn wind, low-to-mid incoming tide — but the tiebreaker (reef over beach break) plus Blacks' face estimate sitting right at the ~6ft skill cap sends the call to Tippers. Ponto is capped at ON despite a high point total: the same long period that lines up the reef risks a closeout on its straight bars. Windansea is capped at ON on tide alone — dawn is too low for its mid-tide (2–4ft) window. Sunset Cliffs is capped at MEH: S is only a marginal angle there, and the low tide exposes the ledges. Oceanside Harbor sits out — this S swell mostly passes the NW-facing jetty by.
Days to Watch
Fri Jul 31–Sat Aug 1 — Wavecast: Genevieve swell fading from "1-2ft overhead" Friday to head-high Saturday, then chest-high Sunday and small/waist-high Mon–Fri (8/3–8/7). Tomorrow is the better of the two big days left before it drops off — a moderate SW groundswell isn't expected again until ~Aug 8.