Rivermouth_Wailuku Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Rivermouth Wailuku over the next couple of weeks.

Straight up, I gotta be honest with ya – the first ten days or so look like a write-off. We’re looking at a real dry spell from Friday the 17th of July right through to Saturday the 26th of July. The wind is stubbornly stuck in the east-northeast, blowing cross-onshore, and the surf is just messy. That combined wave energy is in the low to moderate range (230 to 496), and the swell is short-period junk, mostly 6 to 8 seconds. That’s not giving us any shape. The water temp is sitting at a balmy 79°, which is just about average for this time of year, no big surprises there. But honestly, it’s all poor surf conditions – not worth paddling out for.

Now, after that long gap, things start to get interesting around the 27th of July. The swell finally shows up. We’ve got a proper groundswell rolling in from the east with a very long period of 16 seconds. The combined energy jumps to 2021 (strong) on Monday morning, and even bigger by Monday afternoon at 2456 (strong). The swell size is pushing 6 ft to 7 ft, which is a solid step up. The wind is still a light cross-onshore from the ENE on the morning, but Monday afternoon looks cleaner with a NE wind going straight onshore. It’s not perfect, but it’s the best we’ve got.

The real highlight, though, is Tuesday the 28th of July. That morning, we’re looking at 8 ft of swell from the east-northeast with a long period of 14 seconds and a combined energy of 2702 (very strong). That’s a serious push of water. The wind is a gentle cross-onshore from the ENE, keeping things manageable. Now, 8 ft is big – that’s expert territory. It’s not for the faint of heart, and with that long period, it’s going to be a bit walled-up at the beach. But Rivermouth Wailuku is a reef setup, so that long-period groundswell should wrap in nicely. The crowds can be an issue here – they often are – so get in early.

Wednesday the 29th of July is still a decent option with 7 ft from the ENE, period 12 seconds, and energy at 1294. The wind is light cross-onshore again. It’s a step down in power, but still a solid day.

So, to sum it up: the first week and a half is a total bust. Don’t even bother. Wait for that big pulse around the 27th and 28th of July. Tuesday the 28th is the standout – biggest swell, good consistency, and a reef break that can handle the long period. Just be aware it’s a big one for experienced surfers only. Crowds are likely. If you’re a beginner, wait for a smaller day later in the week.

Rusty.

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