Yonabaru Surf Forecast and Surf Report

Alright, Rusty here, checking in on the local scene for Yonabaru.

It’s a tough stretch, I won’t sugarcoat it. The first week and a half is a write-off. From Tuesday morning, September 8th through most of the second week, there’s nothing worth paddling out for. The wind is either gusty cross-shore or smashing straight onshore, and the swell is small, weak, and messy. We’re looking at a solid 9-day lull with no surf on offer until the following Monday at the earliest — the waves are just not doing anything for us.

The real interest, and the only genuine standout of this entire outlook, arrives much later. On Monday, September 21st, things finally wake up. We’ve got a clean cross-off wind from the NNW blowing 12-16 mph and a substantial groundswell filling in. The morning sees a 8ft swell from the ESE with a very long 18-second period. That’s a deep ocean pulse — the combined swell energy is massive (3537), so you’ll really feel the power. By the afternoon it nudges up to 8ft with the same long period and energy hitting just under 4000. This is proper, powerful swell, and with that cross-off breeze, it’ll be clean and well-shaped for those surfacing at Yonabaru. But don't be fooled, at over 8ft that’s expert territory — leave the beginners and longboarders on the beach. Still, for the experienced crew, this is the best call of the whole 16 days.

Before that, on Sunday, September 20th, there’s a very late afternoon possibility: a long period ESE groundswell of 3ft at 19 seconds with a cross-off wind. Clean, yes, and the energy dropdown is big (797), but it’s a marginal call and the size is small — one for the longboarders if you’re keen on a late glassy session.

The wave window closes again after that, with diminishing swell but still some potential. Wednesday morning, September 23rd, could be pleasant if you’re chasing small clean waves. The swell drops to 4ft from the E at a 13-second period, and the wind is dead calm — glassy conditions. The water temp is 84°, which is about average for this time of year so the water is nice and warm, no surprises.

But overall, this forecast is a waiting game. The middle is dead, then the last Monday and Tuesday bring the goods, but they are a long way off. Lock in September 21st in your calendar — that’s your best shot for a proper session.

Stay patient and paddled out.

Rusty

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