Rivermouth_Wailuku Surf Forecast and Surf Report

Alright, Rusty here. Let's have a look at what we've got coming up.

Right off the bat, I gotta be straight with ya—this ain't looking good for a paddle. For the entire 16-day run, it's pretty much the same story, and it’s not a happy one for surfers. We've got a constant cross-onshore wind from the ENE, mostly 6 to 18 mph. That’s going to keep things choppy, bumpy, and flat-out messy.

The only break in the mix is Rivermouth Wailuku, a reef setup. The water temp is sitting at about 80°, which is about average for this time of year, with a tiny anomaly of 0.5°. So, nothing weird going on there.

Kicking off Monday, August 3rd, we've got some swell around 4 ft to 5 ft from the ENE, but with that cross-on breeze, the wave comment calls it "poor surf conditions." There's some moderate wave energy behind it (381), but it doesn't matter when the wind's trashing it.

Tuesday the 4th sees the swell stick around 5 ft to 5 ft, still from the ENE. The period bumps up to 11 seconds on Tuesday morning, which would normally be a good sign of a groundswell, but with the wind still cross-onshore, it’s just a "marginal" call. Combined energy climbs to 523 on Tuesday afternoon, but again, the wind is the enemy here.

Wednesday the 5th drops off a bit to 4 ft to 4 ft, and the energy falls to 215. Still that same cross-on muck. From Thursday the 6th onward, it's a real grind. Swell heights bounce around between 2 ft and 7 ft, but every single entry is flagged as "poor surf conditions." The period is short, mostly 6 to 9 seconds, which is weak, wind-swell stuff.

By the second week, into mid-August, things actually get a bit bigger. On the 15th and 16th, we see swell around 5 ft to 6 ft, and the combined energy spikes over 600 on the 15th morning. Then on the 17th, we hit 7 ft with energy over 500. But it’s still all cross-onshore, with winds up to 18 mph making it lumpy. That size with that wind? That’s more a kite-surfing setup than a clean wave for the rest of us.

Honestly, there’s not one standout day in this whole stretch. The wind never lets up. If you’re desperate, maybe the Tuesday the 4th morning had the most potential with that longer 11-second period, but the conditions are still poor.

So, what’s the call? For the next two weeks, I’d save the energy and give the board a rest. The surf just isn't on.

Rusty.

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