Molhes de Mampituba Surf Forecast and Surf Report

Alright, let’s talk about Molhes de Mampituba. This river/jetty spot is exposed to the swell, and it’s in for a bit of a mixed bag over the next 16 days. The water is sitting at 64°, which is pretty normal for the time of year, so no worries there.

The first few days are a bit of a write-off. Thursday the 20th starts cloudy with a 3ft ENE swell and a short, weak 5-second period. The combined energy is only 107, so it’s very weak. Not worth paddling out for. Friday the 21st gets a bit more size, but it’s messy with a 22 mph cross-swell on Friday afternoon. That’s poor.

Saturday the 22nd sees the swell pushing up to 7ft from the S with a 9-second period, but the cross-shore wind is 12 mph, and the combined energy jumps to 1094, so there’s moderate energy in the water. The surf is marginal, and the conditions are choppy. It’s not great for a paddle.

Now, Sunday the 23rd morning is where it starts to get interesting. The swell is 5ft from the SSE, but the period is a solid 13 seconds – that’s a proper groundswell. The wind is glassy, just 3 mph from the WSW, and the combined energy is 867. The surf is clean and the wave comment says "expect very good surf conditions." This is a standout window. The swell direction (SSE) is a bit off the optimum SE, but the glassy conditions make up for it. However, this is a long period swell at 13 seconds, so at a river/jetty break, it might get a bit straight and walled up. Still, worth a look.

Monday the 24th morning is the best on offer. The swell is 8ft from the SSE with a very long 15-second period. That’s serious groundswell energy, with a combined energy of 2479 – strong. The wind is glassy again from the W at 3 mph. The wave comment says "excellent surf conditions for experienced surfers." This is big, powerful, and clean. But at 8ft, it’s getting into the "too big for beginners" territory, and with that long period, the jetty might be the only place it holds shape. This is a true standout for experienced surfers.

Tuesday the 25th morning still has a good 6ft SSE swell at 13 seconds, with a light cross-off breeze from the NNE. Combined energy is 903, and the surf is clean. Good option if you missed Monday. Wednesday the 26th and Thursday the 27th mornings also have clean, cross-off conditions with 4ft SSE swell at 12-13 seconds, but the energy is weaker. Worth a paddle if you want a quieter session.

After that, the surf drops off. Friday the 28th has a 8ft ENE swell, but with a cross-shore wind and a 9-second period, the combined energy is 1318 but the conditions are marginal. The weekend of the 29th and 30th is small and messy, with 3ft to 4ft swells and poor conditions. The start of September sees a run of poor surf with small, weak swells. There’s a gap of several days with no real recommendations.

Then, on Friday the 4th of September morning, the surf picks up again with a 6ft SSE swell at 9 seconds, but it’s cross-shore. The afternoon of the 4th looks better: 4ft SE swell at 10 seconds with a light cross-off wind from the NNE, and the combined energy is 554. The wave comment says "expect very good surf conditions." That’s a promising, if distant, option.

So, the standout is Monday the 24th morning for the experienced crew, with that big, clean groundswell. Sunday the 23rd morning is also a solid pick. The rest of the window is patchy, but there are a few clean mornings to scratch around.

Rusty.

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