Rivermouth_Wailuku Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s have a look at what’s on offer for the next couple of weeks at Rivermouth_Wailuku. I gotta be straight with you – this stretch is looking pretty bleak. The whole 16-day window is a tough one, and there’s not a single day I’d call a standout. The first real surf we see is from Saturday the 8th of August, but it’s not good news.

The pattern is stubbornly locked in. A persistent ENE swell is running, but the wind is a constant problem. From Saturday the 8th right through to the end of the forecast, we’re dealing with cross-onshore and onshore winds. This means the surface is going to be choppy and messy, not the clean lines we want. The water temp is sitting at 80°F, which is bang on average for this time of year.

Right from the start, Saturday the 8th brings a 5ft ENE swell with a short period of 7 seconds and combined energy of 189 – weak, wind-chop stuff. The wind is a 12 mph cross-on from the NE. It’s just poor. Sunday the 9th is a little bigger at 5ft to 5ft, but the wind picks up to 16 mph in the afternoon with rain showers, making it even worse. This same story just repeats: Monday the 10th, Tuesday the 11th, all the way through the week. Swell hangs around 4ft to 5ft, always ENE, always short period (6 to 8 seconds), and always cross-onshore winds. The combined energy stays in the low to mid 100s and 200s – weak.

Towards the end of the first week, things actually get a bit more size, but that makes it worse. Friday the 14th sees the swell bump up to 7ft in the morning and 8ft in the afternoon, with energy climbing to 595 (moderate). But the wind is a fresh 16 mph cross-on from the NE, and the period is still short at 7 seconds. It’s just a big, messy, onshore mess.

The second week kicks off with a pulse. Saturday the 15th of August has a 10ft swell from the ENE with a period of 8 to 9 seconds and combined energy hitting 1083 in the morning and 1298 in the afternoon – that’s strong wave energy. But the wind is howling at 22 to 25 mph from the NE, with a risk of thunderstorms. This is a dangerous setup, well over the 8ft mark, so experts only, and even then, with that wind it’s going to be a washing machine. Sunday the 16th is a slight shift: the wind swings to the S and SSE at 25 mph, becoming cross-offshore, cleaning it up a bit. The swell is still 10ft in the morning dropping to 8ft, and energy is 1162 and 819. The conditions are described as “clean” but the rating is still just a marginal 1/10. It’s the closest thing to a window, but with that wind strength, it’s more of a challenge than a pleasure.

From Monday the 17th onwards, we fade back down. Swell drops to 6ft and then 6ft, with energy dropping into the 300s and 400s. The wind stays cross-onshore from the ENE and NE, 6 to 12 mph. The rest of the week, from the 18th through to the 23rd of August, is all the same: swell between 4ft and 5ft, short period (6-8 seconds), weak energy (200-330), and constant cross-onshore or cross-shore wind. It’s all poor.

Honestly, there’s nothing here to get excited about. The winds are relentless, the swell is short-period and onshore, and the quality never shows up. With this persistent cross-onshore wind and a beach-and-reef setup, this looks more interesting for kite surfing than paddle surfing. We’ll have to wait for a change in the pattern. Keep an eye on it, but don’t hold your breath.

Rusty.

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