Marengo Surf Forecast and Surf Report

Alright folks, Rusty here. Let's get straight into it for Marengo because this forecast is a proper story of two halves – a wild, hold-onto-your-board start, then a quiet spell, before a big, buzzy return at the end.

We kick off this Wednesday morning, the 12th of August, with a serious pulse of energy. The ocean is absolutely hammering the reef and point setup with a massive 15ft swell from the WSW. This is proper, deep-water groundswell with a 16-second period, packing a combined energy of 11715, which is extreme. The water is sitting at 57°, which is pretty normal for this time of year, so no surprises there. The wind is a strong 19 mph offshore, keeping the faces clean, but make no mistake – this is not for the faint-hearted. With waves over 5ft, this is strictly for the experts. The afternoon stays big at 13ft and still clean.

Thursday the 13th is the absolute standout. The morning delivers a peak 16ft SW swell with a 16-second period. The combined energy is a staggering 15497. Don't even think about it if you're a beginner. The wind is 16 mph offshore, and the conditions are described as exceptional for expert surfers. This is the kind of day that will be talked about. The afternoon drops to a still hefty 10ft, much more manageable for experienced surfers, and the wind eases to 12 mph offshore.

Things settle down from Friday the 14th through the weekend. We’ve got 8ft to 7ft SW swells, still with decent 15-16 second periods, but the winds go cross-offshore. It’s cleaner surf, but the energy is dropping. The combined energy falls from 3102 on Friday morning down to 1720 by Saturday afternoon. It’s still good for experienced surfers, but not the top-tier quality of the previous days.

Sunday the 16th is a write-off. The swell drops to 5ft, but the wind switches to a light cross-onshore, making it messy. Expect small, wind-affected waves.

Then we hit a real quiet patch. From Monday the 17th right through to the 22nd of August, Marengo goes flat and poor. The swell drops below 4ft, and the wind is consistently onshore or cross-shore. We’re looking at a solid six-day gap where the surf is basically not worth paddling out for. The energy numbers are in the dumps, with plenty of zeros and ones in the score column.

The action starts to rumble again on the 23rd of August. The Sunday morning sees a 2ft SW groundswell with a super long 20-second period, paired with 16 mph offshore winds. It's small, but that long period means it will be clean and lined up. Energy is 685, which is still weak, but it signals a turn.

The real talk, the big return, is on Tuesday the 25th of August. That morning, a 6ft SW swell hits with a 16-second period, and the wind is howling 25 mph offshore. The energy jumps to 3214. But it's the afternoon that gets the heart racing. The wind ramps up to 28 mph offshore, and the swell jumps to 10ft from the WSW. The period drops to 10 seconds, which is short, but the pure power is back. The energy is 4039. The description says "strong offshore and clean but hard to paddle into," and that's the truth. For the experts, it's on.

Wednesday the 26th keeps the big stuff coming. A massive 15ft SW swell with a 14-second period hits in the morning, with 22 mph cross-offshore winds. The energy is 9542. It's huge, but the cross-off wind angle might make it a bit tricky. The afternoon drops to 12ft, still big.

Finally, Thursday the 27th of August winds it down with a beautiful finish. The morning has a 10ft SSW swell, 13-second period, with 9 mph cross-offshore winds. The energy is 3143. But the real gem is the afternoon: 8ft SSW swell, 13-second period, and the wind goes completely glassy – zero. That's a rare and perfect window for experienced surfers to get smooth, clean bombs.

Highlight: The absolute best on offer is Thursday the 13th of August, morning session. That 16ft SW swell with perfect offshore wind is a once-in-a-forecast event for experts. For the second week, the late window on Thursday the 27th of August afternoon, with 8ft SSW swell and glassy conditions, is the one to circle for a truly memorable session.

Rusty out.

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