Tainohama Surf Forecast and Surf Report

Alright, Rusty here, let's get into it. For the next 16 days at Tainohama, it’s a real mixed bag with a lot of onshore junk to sit through. The water is sitting at a warm 84.2°F with the anomaly 2.5°F above normal, so it’s a touch warmer than usual for this time of year down at this reef break.

We kick off with Friday the 28th. Morning has some clouds with a light cross-onshore breeze from the SSW at 6 mph pushing into a weak 3-foot SSW swell, period only 8 seconds. Combined wave energy is 221 – moderate but barely there. The afternoon turns risk of thunderstorms with the same wind, and the surf is a no-go. Not worth paddling out.

Saturday morning the 29th clears up, wind goes glassy, and we get a 3.3-foot SSW swell, still short period at 8 seconds, energy down to 184. It’s clean, but the waves are ordinary. Saturday afternoon sees the southerly pick up to 9 mph cross-onshore, and it gets choppy. Sunday the 30th starts glassy again with a light easterly, but the swell drops to 2.3 feet from the south at 7 seconds, energy only 97 – weak. By afternoon it’s back to poor surf. Monday the 31st has a clean 3-foot southerly swell but period bumps up to 11 seconds, with light southerly onshore wind, energy 215. Still only marginal. Monday afternoon gets a moderate breeze from the SSE, choppy, and the quality tanks.

Tuesday the 1st of September brings a risk of thunderstorms and a jump in swell to 6.2 feet from the SSE, period 9 seconds, but the cross-onshore wind is a moderate 16 mph, energy up to 644. It’s poor for surf. The swell keeps building through Wednesday the 2nd, hitting 8.2 feet in the morning and 9.8 feet in the afternoon from the SSE, with onshores running 19-22 mph. Energy goes over 1000 – strong wave energy – but the wind is ruining it. This is big stuff (over 8.2 feet) so only for experts, and with the wind and it being a reef break, the setup looks more interesting for kite surfing than paddle surfing. Thursday the 3rd keeps the big swell (8.2 feet) but also a strong breeze at 25 mph from the SE, energy a massive 2483. Onshore all the way. Not surfable.

Friday the 4th and Saturday the 5th show the swell dropping back to 3.9-4.9 feet from the south, but winds stay cross-onshore and choppy. Patience needed.

Now, here’s where it gets interesting. Sunday the 6th of September morning – a real standout. Wind swings to a light northerly cross-offshore at 9 mph, the swell drops to 3.3 feet but the period jumps to 14 seconds. That’s a proper groundswell, long period, and the energy is 1037 – strong. The waves will have shape and power, but that long period means at a reef break like Tainohama, it should line up nicely. The conditions are clean. This is the best on offer in the whole outlook. By afternoon the swell builds to 7.9 feet from the SSE with period 13 seconds, energy 2975, still with that cross-offshore wind. This is excellent for experienced surfers, but the size (over 8.2 feet?) just a shade under, but still big. Monday the 7th morning keeps clean with a cross-offshore from the NNE at 6 mph, 6.9 feet SSE swell, period 10 seconds, energy 862. Very good surf. The afternoon goes messy again.

Tuesday the 8th of September has glassy conditions, light NNE wind in the morning and calm winds in the afternoon, with a consistent 4.6-foot SSE swell at 10-9 seconds, energy around 370-400. Clean, surfable waves. Wednesday the 9th morning goes offshore from the NW at 9 mph, 3.3-foot SSW swell, period 9 seconds, energy 254 – good for a fun session.

The second week brings more size but the winds stay onshore or cross-onshore for the most part. Thursday the 10th has a 7.5-foot SE swell with period 14 seconds, energy over 2000, but only a light cross-onshore – still marginal. Friday the 11th sees the swell pump to 9.8 feet in the morning and 13.1 feet in the afternoon from the SE, periods 14 and 12 seconds, energy soaring to over 7500. This is huge (well over 8.2 feet), expert-only territory, and the wind is cross-onshore. The conditions are marginal for surfing, but the power is undeniable. Saturday the 12th peaks with a 13.1-foot swell from the SE, period 14 seconds, energy 8089. That is massive wave energy, but with a southerly onshore wind at 3 mph it might be glassy enough for the brave. Still, this is a serious slab of ocean.

Overall, the standout is Sunday the 6th into Monday the 7th – clean conditions and a solid long-period groundswell. The later part of the outlook in the

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