Mangamaunu Surf Forecast and Surf Report

Alright, folks, Rusty here. Let’s break down the next couple of weeks for this spot. We’ve got a classic tale of patience in the first week, followed by some serious firepower in the second. Don’t jump in too early.

We start on Friday the 4th of September at Mangamaunu. It’s tiny, with a 2ft S swell pushing in at 9 seconds, and the energy is weak (118). The water temperature is about average for this time of year. The wind is a light cross-offshore from the NW, so it’s clean, but the waves are just too small to get excited about. That sets the tone for the next few days. Saturday and Sunday stay small, around 2ft to 2ft, with some glassy moments on Saturday morning that’ll look pretty, but there’s just no power behind them. The combined energy stays under 200 most of this time. Monday and Tuesday get a little bump in swell height, up to 4ft, but the period drops to 6 seconds and the wind shifts onshore or cross-shore, making it choppy and messy. Not worth paddling out for.

Wednesday the 9th and Thursday the 10th are more of the same—small, crumbly, cross-onshore wind. The 10th morning goes glassy again with a 2ft, 13-second S swell, but the energy is still low (134). It’s a tease. Basically, we’ve got a quiet stretch from the 4th through the 10th with no real standout surf. Just small, weak waves and mostly average conditions.

Then, things change. Friday the 11th of September is when the ocean wakes up. We start to see a proper groundswell from the SSW, 3ft but with a very long period of 19 seconds. The energy jumps to 947 (moderate to strong). The wind is a clean cross-offshore from the SW. This is legit. The swell is still building, but the quality is there for the advanced crew. By Saturday the 12th morning, it’s on. A 8ft S swell at 12 seconds, with a massive 1450 energy reading. The wind is light offshore from the WSW, almost glassy. This is the standout of the entire forecast. The waves will be powerful, lined up, and clean. That’s a lot of water moving, so this is strictly for experienced surfers. Sunday the 13th morning is right there with it too—8ft S swell, 12 seconds, offshores from the W, energy 1723. That’s the biggest swell of the run. Both Saturday and Sunday mornings are the absolute pick of the fortnight.

The energy drops a bit Monday the 14th, but it’s still a solid 5ft, though the wind picks up to 30 km/h from the WSW, making it a bit of a battle. Tuesday the 15th morning is a sneaky good one: glassy calm, 4ft S swell at 10 seconds, energy 312. It’s clean and smooth. Wednesday the 16th keeps the clean theme going with a 5ft SSW swell from the WNW offshores. Thursday the 17th looks like another beauty: 6ft S swell, 15 seconds, energy 1330, and light offshore winds. That’s serious groundswell again, perfect for a point break like this.

The last few days of the 18th and 19th fade back to small, glassy conditions, around 2ft to 2ft, with a long period 19-second swell on the 19th morning giving it a bit of class, but it’s more of a clean-up session.

If you want the best waves, you’re looking at Saturday the 12th and Sunday the 13th. That’s the real deal. For a clean, glassy option with less crowd pressure, Tuesday the 15th morning is a solid fallback.

Rusty.

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