Rivermouth_Wailuku Surf Forecast and Surf Report

Alright, this is Rusty. Let's have a look at the Rivermouth_Wailuku forecast.

To be straight up with you, the next week or so looks pretty average. The wind is locked in from the east, blowing cross-onshore almost every single day. That’s going to keep the surface choppy and messy. We’ve got a consistent run of small to moderate swell, around 4 to 6ft, mostly from the ENE, but that onshore breeze kills it. The water temp is sitting at about 79°, which is pretty much bang on normal for this time of year, so no surprises there.

For the first few days, from Saturday the 18th through to Friday the 24th of July, it’s just a grind of poor surf. The combined swell energy bounces around between 177 and 625 (moderate), but it doesn't matter because the wind is ruining it. Don’t bother paddling out expecting anything clean.

Then we get a bit of a shift heading into the weekend of the 26th of July. The swell picks up, and more importantly, the period jumps to 16 seconds. That’s a long-period groundswell, and it brings some real energy with it – we’re talking 1130 to 1343 (strong to very strong). The swell height sits around 4 to 5ft. Now, the caveat here is that with that long 16-second period, it might break a bit too straight at a beach setup, but Rivermouth_Wailuku is a reef break. That is what you want. It should produce better shaped, more powerful waves.

The downside? The wind is still cross-onshore, so it’s never going to be glassy. The forecasts call it "marginal" or a 1 or 2 out of 10, which is the best we get here. The swell direction is from the East, which isn't the ideal NNE direction, but with that much energy, it’ll still be the best on offer. For a standout, I’d aim for the 27th of July, Monday morning and afternoon. The swell is 5ft, period 14 seconds, and the wind drops to a gentle breeze (9 mph). It’s still cross-onshore, but lighter wind means less chop. The combined energy is 1177 and 1123 (strong). This is about as good as it gets in this window.

After that, it fades again. By the 29th of July, the period drops back to 11-12 seconds, and the swell drops under 4ft. The wind stays cross-onshore. It’s back to the poor conditions we started with. That run of poor surf looks like it will stretch all the way to the end of the forecast on the 2nd of August.

So, here’s the call: the window from Saturday the 26th to Monday the 28th of July is the only one that really has any juice. It won't be perfect, but for a reef break seeing that kind of long-period energy, it's your best bet if you can handle a bit of chop. Keep in mind that it's often crowded here, so expect company.

Rusty.

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