Nai Harn Beach Surf Forecast and Surf Report

Alright, grab a seat and listen up. Rusty here, and I've gotta be straight with you – the next couple of weeks at Nai Harn Beach look pretty grim if you're looking to paddle out. We're staring down the barrel of a long, frustrating stretch of poor conditions, and honestly, there's nothing here that I'd call a proper standout for a surf. It's a beach and reef setup, and the best thing I can say is that it tends not to stay this bad forever, so keep an eye on it.

Right now, through the 8th and 9th of September, we've got tiny little windswell with periods around 5 to 6 seconds. The winds are cross-onshore and choppy, making a mess of what little energy there is. The combined swell energy is weak, sitting between 48 and 73. Not worth getting wet for.

We move into the 10th and 11th, and it's more of the same – tiny waves with a bit more wind, and the energy is still weak, ranging from 9 to 35. On the 11th afternoon, the swell height bumps up to 5ft, and the combined energy finally hits a moderate 221, but the period is a short 6 seconds, and it's still cross-onshore and choppy. It's messy.

The 12th and 13th of September see the swell drop right back down, with a few small pulses of long-period groundswell (periods of 19 to 22 seconds). The energy gets up to a moderate 144 on the 13th afternoon, but with such long periods and tiny 1ft waves, there's just no power. It'll be breaking straight and frustrating.

The 14th of September morning looks a bit calmer with a light breeze, but the swell is still only 1ft with a 17-second period. The energy is moderate at 176, but again, no real push to it. The afternoon gets messy again with a fresh cross-onshore wind.

From the 15th, we start seeing some bigger swell filling in. By the morning of the 16th, we're looking at 8ft swell from the west with an 8-second period. That's a lot of short-period windswell, and the combined energy jumps to a very strong 1014. The winds are onshore, though, making for poor surf conditions. The afternoon gets even bigger, hitting 10ft with energy at 1392, but the rating is still terrible. This is big, raw, and blown out – only for the experts, and even then, it's not pretty.

The 17th of September is the peak of this pulse. We're seeing 12ft swell in the morning with energy at 1610 and howling onshore winds at 25 mph. That's a full-on stormy mess, more interesting for kite surfing than paddle surfing, if I'm honest. It's dangerous and ugly.

After that, it slowly fades. The 18th still has 8ft to 7ft swell, but the winds start to ease, and by the 19th we're back to flat, tiny 0.3ft waves with virtually no energy. The 20th and 21st are more of the same – small, weak, and mostly cross-shore winds. The 22nd and 23rd see a little bump in period but the height stays below 1ft, with energy remaining weak.

So, the long and short of it is: there's no good surf in this 16-day window. The swell either isn't there, or when it is, the wind ruins it. We've got a blank run from now through to the 23rd of September, so maybe go check the forecasts again in a week or two. Things can change.

Rusty.

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