Molhes de Mampituba Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s take a look at what’s coming up for Molhes de Mampituba. This river/jetty spot is our main focus for the next 16 days. It’s gonna be a real mixed bag, so don’t expect a consistent run of perfection. We’ve got a few windows that look promising, but plenty of time to kick back and watch the clouds roll in too.

The water is sitting at 63°, which is only 0.7° cooler than normal for this time of year, so pretty average—nothing to write home about on the temperature front.

The first real standout is going to be Wednesday morning, the 9th of September. It’s not the biggest swell we’ll see, with waves around 3 ft from the SSE, but the wind is dead glassy. That’s a major positive. The swell period is a nice long 12 seconds, giving it some real push and shape, and the combined energy is a solid 318 (moderate). That’s a session where the lineup will feel clean and the waves will have some fun form.

Thursday the 10th offers another good option for the morning. We’re looking at 3 ft from the SSE, but with a 15-second period—that’s proper groundswell, folks. The energy is up to 412 (moderate), and with a light cross-off breeze from the NNE, it’ll be clean. This long period will be better for the jetty structure, giving long, lined-up waves, though it might break a bit too straight if you’re out on the beach. Keep an eye on the banks.

If you’re chasing a bit more size, Saturday the 12th is a big one, but it’s a warning as much as a highlight. We’re talking 10 ft from the S, with a combined energy of 3034—that’s strong. But the wind is a howling 16 mph cross-shore, and at this size, this spot is really only for the experts. It’s going to be a raw, heavy, washing machine. The morning has the best window, but it’s a serious step up in difficulty.

The best overall bet? I’d put my money on Thursday morning the 17th of September. That’s a week and a half away, so call it a promising long-range call. We’ll have 4 ft from the S, with an 11-second period. The combined energy is 574 (moderate), and the wind is a clean cross-off from the NNE. The forecast says “expect very good surf conditions,” and that’s the kind of report that gets me out of bed. It likely won’t be too crowded, but this spot can get busy, so expect some company.

There’s also a decent-looking run of mornings from the 20th through the 23rd of September. The 20th morning has 4 ft from the E, clean with a cross-off breeze. The 21st morning is similar with 4 ft, and the 22nd morning has 3 ft, all clean. The 23rd morning is worth a mention too, with 4 ft from the ENE, but a short 6-second period, so it’ll be a bit lumpy and weak. Still, a clean wave is a clean wave.

Outside of these windows, expect a lot of cross-on wind, short periods, and messy conditions. There are several days in a row at the end of the first week and into the second where the surf is either poor or marginal. It’s a typical pattern for this area—when it’s off, it’s off, but when it lines up, it’s gold.

Stay patient, pick your windows, and I’ll see you out there.

Rusty

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