Onjuku Surf Forecast and Surf Report

Alright folks, Rusty here. Gonna break down the next 16 days for us at Onjuku.

First up, the water temp is about average for this time of year, nothing unusual there. The opening stretch is a bit of a slow grind. We've got small, weak waves from the 11th through the 17th, with most of it being pretty ordinary. The combined energy is low, sitting between 164 and 286 (moderate energy) for the cleanest bits, but the swell is tiny and inconsistent.

The standout window is the morning of the 18th of September. We’re looking at a solid 6ft SSE groundswell, with a long 16-second period, and the wind is offshore from the NNE at 15 mph. The combined energy jumps to 1792 (strong energy), which is a real jump. This is clean, powerful, and will have some proper shape. That afternoon, it even bumps up to 8ft, but the wind gets stronger, making it a bit more of a handful. Still, the morning session is the one to circle.

The 19th of September sees a monster 12ft swell, but it’s too big for this spot. The wind is still good, but the size makes it a no-go for most. That trend continues right through the 22nd, with huge, dangerous surf. The 22nd morning has a 20ft swell with 11098 total energy (very strong energy) – that's for experts only, and even then, conditions are grim.

After that, the energy drops off a cliff. From the 23rd onward, we’re back to messy, short-period windswell or tiny leftovers, with strong onshore winds. The 24th afternoon has a rare glassy moment, but the swell is a pathetic 2ft. The 26th is basically a washout with 3ft of junk.

So, the only real highlight is the morning of the 18th. It’s a clean, powerful groundswell that will offer some proper waves. The rest of the run is either too small, too big, or too windy. A few days of potential in the middle, but the rest is a write-off.

Rusty.

Read more