Rivermouth_Wailuku Surf Forecast and Surf Report

Alright folks, it’s Rusty here. Let’s talk about Rivermouth_Wailuku. This is a reef setup and it’s fairly consistent, but honestly, this 16-day window is a tough one for clean surf. The ocean is pumping a lot of energy at us, but the wind is just not playing ball most of the time.

We’ve got a big pulse of swell starting on Monday the 27th of July, with 6ft of east swell and a very long period of 14 seconds. The combined energy is strong at 1306. That’s proper groundswell, but the wind is an onshore 12 mph from the NE. That’s going to make it messy. The water temp is 80°, which is about average for the time of year, so no wetsuit worries there.

The real standout, the only window we should be getting excited about, is Wednesday morning, the 29th of July. The wind drops right out, turning glassy from the ESE at just 3 mph. The swell drops a touch to 6ft from the ENE, with a period of 9 seconds. The combined energy is moderate at 430, but with that glassy surface, the waves will be clean and well-shaped for a reef. That’s your best bet. The afternoon on the 29th gets a bit of a cross-shore breeze, so the quality drops.

After that, from Thursday the 30th of July all the way through to Tuesday the 11th of August, it’s a long, frustrating run of poor conditions. The swell sticks around, often between 5ft and 7ft, and the combined energy stays moderate to strong (hitting over 800 on some days), but it’s all coming with a cross-onshore breeze from the ENE or E. That’s going to leave it choppy and bumpy. It’s not fun paddle surfing, though if you’re into kiting, the setup might be worth a look.

The swell is mostly short period (8 seconds) for much of that stretch, which means less power and lumpier waves. For a few days around the 4th and 5th of August, the period stretches to 11 seconds, which is better for shape, but the onshore wind still ruins the surface. By the 6th and 7th of August, the period drops back to 7-8 seconds and the swell pushes 7ft, which is getting big for beginners and is messy for everyone.

The crowds are often there at Rivermouth_Wailuku, so take that into account. This is a spot that can handle a good swell, but not when it’s windy.

So, to sum it up: Wednesday morning, 29th of July, is your standout. Get out there early for the glass. After that, keep your board in the car for a couple of weeks, because the forecast is a long, choppy slog.

Rusty.

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