Rivermouth_Wailuku Surf Forecast and Surf Report

G’day, Rusty here, looking at your local setup. Well, mate, I gotta be straight with you – we’ve got a bit of a flat spell ahead. The good news is that Rivermouth Wailuku has some waves on offer, but the timing and conditions are a real mixed bag.

The surf kicks off on Wednesday afternoon, July 29th, with a 5ft NE swell, but the period’s short at 8 seconds and it’s a cross-shore wind. It’s pretty weak, with combined energy sitting down at (279), so it’s marginal at best. Water temp’s sitting at 79°, which is pretty normal for this time of year, no drama there.

The bigger news is the swell that builds in from Thursday, July 30th, through the weekend. By the 31st and into August 1st, we’re seeing consistent 6ft to 7ft ENE swell. But here’s the kicker – the wind is a relentless moderate cross-onshore breeze, 12-16 mph, and it’s gonna chop things up something chronic. The combined energy hits (899) on Saturday afternoon, which is solid, but it’s gonna be messy. That’s more kite-surfing territory than paddle surfing, mate – the beach break is gonna be blown out.

There is a tiny glimmer on Tuesday, August 4th, when the period stretches to 11 seconds on the morning and 10 seconds in the afternoon, with a 5ft to 6ft ENE swell. Combined energy jumps to (1024) in the arvo, which is a decent amount of juice. But the wind is still light cross-onshore, which means it’s not quite glassy. It’s still marginal, but it’s the best-looking day in the first week.

The absolute standout? Honestly, there isn't a screaming one. If you’re desperate for a paddle, Tuesday afternoon, August 4th, is your best bet – that 6ft, 10-second ENE swell has some push, and the wind is light. The optimum swell direction for this reef break is NNE, and we’re getting ENE, so it’s a bit off the mark, but it’s the cleanest window we’ve got.

After that, the swell drops right off. From August 5th onward, we’re seeing small, weak swell – mostly 2ft to 5ft – and the period drops back to 6-7 seconds. Combined energy is barely scraping (100-267) for most of that. The wind stays cross-onshore, and it’s all labelled “poor surf conditions.” You’re looking at a gap from August 5th right through to August 13th where there’s just nothing worth paddling out for. That’s a solid 9-day dry spell.

A couple of things to keep in mind: Rivermouth Wailuku is a reef break that is fairly consistent, but it can get crowded (often), so don’t expect a quiet lineup. The long-period swell on the 4th (11 seconds) might make it a bit more lined up for the reef, but at a beach break it could be a bit straight. Still, for this 16-day window, it’s the only show in town.

Look, it’s a tough run. The forecasts can change, so don’t bin your wetsuit just yet, but for now, it’s a waiting game.

Rusty.

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