Molhes de Mampituba Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s get stuck into what’s on the cards for our little stretch of coast. The next couple of weeks have some real highs and a few lows, but there are definitely windows to get a good one.

Overall Pattern
We’ve got a bit of a slow start, but by Sunday morning conditions start cleaning up nicely. The standout period looks to be from Monday the 24th right through Wednesday morning the 26th, with a proper groundswell rolling in and some glassy or offshore winds to keep things tidy. After that, we’re looking at a quieter spell from the 28th onward, with smaller energy and more cross-shore winds, though there are a couple of glassy moments to keep an eye on.

Forecast Details
Right now, the first surfable option is for Friday the 21st morning at Molhes de Mampituba (river/jetties). The swell is a small 3 feet from the SSW, only 7 seconds period. Water temp is sitting at 63°, which is bang on average for this time of year. The wind is a cross-offshore, so it’ll be clean, but the energy is weak (100) – it’s really just a paddle for a little wave.

Friday afternoon sees the swell bump up to 5 feet, but the wind swings cross and picks up to 30 km/h, making it messy. Not worth it.

Saturday the 22nd brings a jump in size – 7 feet from the S in the morning, period up to 9 seconds. The combined energy is strong (1383), but the wind is still cross-shore and choppy. Saturday afternoon is similar but with cross-onshore wind. It’s marginal.

The Standout Window Arrives
Sunday morning the 23rd is where it starts to get good. We’ve got a 6 feet S swell at 12 seconds, light cross-offshore breeze, and clean conditions. The energy is moderate (905), but the longer period means better shaped waves. It’s not huge, but it’ll be fun.

The Absolute Best – Monday 24th Morning
This is the one to aim for. Monday morning delivers a solid 8 feet SSE groundswell with a very long 15-second period. The wind is a light cross-offshore, and it’s beautifully clean. The combined energy is strong (2294). This is excellent surf for experienced surfers – the kind of session you’ll be talking about. The long period means it’ll stand up nicely on the river jetties, with long, powerful walls. Just be aware, with that much energy and size over 5 feet, it’s not for beginners. The set gaps will be longer, making paddling out easier, but the waves will have some push.

Tuesday morning the 25th is still very good – 5 feet SSE at 12 seconds, light cross-offshore breeze, clean. Energy is moderate (609). A great follow-up session.

Wednesday morning the 26th rounds out the run with 3 feet from the SSE at 14 seconds, clean with a cross-offshore breeze. Small but clean and long period (696). Good for a log.

The Second Week
From Friday the 28th onward, the swell drops back. Friday morning and afternoon both offer 4 feet from the E at 8 seconds, with light winds – the afternoon even goes glassy. The energy is weak (334 and 287). It’s small fun surf, not a standout.

Saturday the 29th and Sunday the 30th are a write-off with cross-onshore winds and messy conditions.

Monday the 31st morning sees a pulse of 7 feet ENE short-period swell (8 seconds) with cross-offshore wind, but it’s accompanied by light rain. Energy is moderate (903). Could be a bit of fun if you’re desperate, but it’s not as clean as the previous week.

After that, it’s mostly small and choppy until Wednesday morning the 2nd of September, when we get another glassy morning. 5 feet from the S at 7 seconds, clean with calm wind (323). Wednesday afternoon is also glassy with 6 feet S at 8 seconds (384). Nice little window, but small and short period.

The rest of the week into the 5th of September is mainly poor with onshore winds and rain. There’s no real standout in that last stretch.

Crowds at Molhes de Mampituba are likely, so get there early for the best windows.

So, for my money, set the alarm for Monday the 24th morning – that’s the pick of the bunch. Sunday the 23rd morning is also a beauty. The rest is either small fun or a bit of a battle.

Stay stoked,
Rusty

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