Rivermouth_Wailuku Surf Forecast and Surf Report

Alright, surfers, Rusty here. Let’s talk about the next couple of weeks. It’s a bit of a strange one, so let’s break it down.

We’ve got a long stretch of messy, cross-onshore wind and weak, short-period swell that just won’t give us a clean wave for the first week or so. It’s not looking good for a paddle. The water temp is running about average for this time of year, so no surprises there, but you’ll be fighting a bumpy, choppy surface with the wind blowing sideways. It’s all a bit of a grind.

The first few days, from Tuesday the 11th through the weekend, are pretty much a write-off. The swell is small, around 4ft to 6ft, but it’s short-period stuff, coming in at 7-9 seconds, and the wind is constantly cross-onshore. This just makes for ugly, powerless little waves at Rivermouth_Wailuku (Hawaiian Islands). The energy is weak to moderate at best, with readings between 163 and 613. It’s not surfable, just choppy and frustrating.

We’ll see the swell build into Sunday the 16th, with the energy jumping up into the 1300s and the period stretching out to 11 seconds. But the wind switches to a strong onshore from the north, and we even have a risk of thunderstorms. The size is there, hitting 8ft to 8ft, but with that onshore wind, it’s just going to be a lumpy, blown-out mess. That’s not a window, that’s a storm.

Then, things change on Monday the 17th. This is the one day that stands out as the best on offer. The wind swings around to a light cross-offshore breeze from the southeast at 9 mph, and the conditions clean right up. The swell is still solid, around 8ft to 8ft, with a period of 10 seconds and strong energy in the 1157 to 1268 range. This is a proper reef-break swell, and for the experienced crew, it’s going to be firing. The direction is ENE to NE, which is right on the money for this spot. It’s an expert-only day, though—at this size on a reef, it’s too much for anyone not comfortable in proper waves. The crowd factor is real, too, as this spot can get busy, but for one day, it’s worth the fight. This is the standout: clean, powerful, and well-shaped. Get on it if you have the skills.

After that, we drop back into the doldrums. From Tuesday the 18th and for the rest of the forecast period, the swell backs down to a weak 3ft to 6ft, the period drops back to 7-8 seconds, and the energy weakens. The wind goes back to that dreaded cross-onshore, making everything a bumpy, choppy mess again. This flat spell looks set to last a long time, right through to Wednesday the 26th. It’s frustrating, real frustrating.

So, the long and short of it: there is one day, Monday the 17th, that is a true standout. For a week before and a week after, it’s mostly a blank run. That’s just how this spot goes sometimes. But when it fires, it’s worth the wait.

Keep your head up, check the buoys, and be ready for that Monday.

Rusty.

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