Foam

Go now while the light is clean and the period is long. The 15-second groundswell from the southwest wraps into the bay with real shape and drive, and the cross-shore easterly wind at this strength will hold the faces together through the morning. Chest to overhead, it looks like, with enough push in it that only confident, experienced surfers should paddle out today; the reef demands respect and the power is genuine beneath the mellow shape Gerupuk usually offers.

By mid-afternoon the wind swings southeast and fills to 22 kilometres per hour, turning the faces choppy and fat as it blows harder across the lineup. The swell window closes well before then.

Tomorrow the swell fills to shoulder to overhead, probably overhead in the bigger sets, and peaks a full star above today. The morning will be the call, before the day wind builds; the pattern repeats in essence, though with more consequence at this size, and confident, experienced surfers will find the better shape then. Forecasts can shift once the swell's on the horizon, but the read is solid enough to plan around.