Marengo Surf Forecast and Surf Report

Alright, Rusty here. Let's get into it for Marengo.

We've got a solid run of surf coming up, starting Friday the 21st of August. It ain't a quiet start—it's a big, raw swell for the experienced crew. The water temp is sitting at 57°, which is pretty much bang on for this time of year, so no surprises there.

Friday morning kicks things off with some clouds overhead and a wicked 10ft swell from the WSW. The period is a very long 15 seconds—that's pure groundswell energy, and the combined energy reading is a strong 4366. This kind of deep-water pulse will wrap beautifully around the reef and point at Marengo. The wind is a moderate offshore breeze from the W at 12 mph, meaning clean, groomed faces. This is definitely one for the experienced folks; at 10ft it's too much for beginners. Friday afternoon holds similar size and power, just with a bit of rain moving through, but the WNW wind keeps it offshore and clean.

Now, Saturday the 22nd is the standout. The morning sees the swell pumping to a massive 16ft from the WSW, with a period of 14 seconds and a combined energy reading of 13476. This is a powerful, heavy wall of water—expert territory only. The wind is a moderate offshore from the WSW again. But the real magic is Saturday afternoon: a 15ft swell from the SW, period still 14 seconds, but with clear skies and clean offshore wind. This is the best of the best for the big wave chargers. This reef and point setup will handle it, but you need to know what you're doing.

Sunday the 23rd settles down a lot. The swell drops to around 6ft to 7ft from the SW, with a very long period of 16 seconds on the afternoon. The energy is much more manageable at around 1929. The wind goes light and cross-offshore, making for clean, if slightly softer, waves. This is a good session for a wider range of surfers.

Monday the 24th through Tuesday the 25th sees the swell drop further to 5ft, and the energy drops below 1000, making for weak, slow conditions. Winds are light and variable, sometimes cross-shore, so it's clean but a bit weak and junky. A paddling day more than anything.

Wednesday the 26th brings a pulse back up to 10ft from the WSW, with a combined energy of 4198. But the wind is a stronger cross-offshore from the WSW at 16 mph, which will blow out the top of the wave a bit. Still a powerful wave for the experienced, but not as clean as Friday or Saturday.

Thursday the 27th is tiny, with a 2ft swell. The afternoon turns glassy, with a very long period of 21 seconds, but there's just no push.

Moving into the end of August and the start of September, there's a consistent run of solid, clean surf. Friday the 28th has a 6ft SW groundswell with 17-second period and a fresh offshore wind. Saturday the 29th is a write-off with strong cross-offshore wind and a weak 4ft swell. Sunday the 30th has a 4ft SW swell with a moderate offshore wind, decent but small.

Then from Monday the 31st of August through Wednesday the 2nd of September, we get a beautiful window. Swell heights hold between 5ft and 7ft from the SW, with very long periods of 15 to 16 seconds and clean to offshore winds. This is excellent, consistent, and well-shaped for experienced surfers. The combined energy sits around 1500-1900, giving nice medium-strength waves. This is your pick for the early part of September if you want solid but not terrifying conditions.

Thursday the 3rd of September turns ugly with fresh breezes and a drop to under 3ft.

But then, Friday the 4th of September is the second true standout in this 16-day window. The morning hits with a 10ft SW groundswell, period of 16 seconds, and a combined energy of 7299. The wind is a gentle offshore from the WNW at 9 mph. This is exceptional, expert-level surf. The afternoon stays strong at 7ft with a very long 19-second period.

Saturday the 5th of September drops off a bit with a strong 22 mph cross-offshore wind making things choppy and messy, despite the 8ft swell.

So for the first week, the absolute best is Saturday the 22nd afternoon. For the second week, keep your eye on Friday the 4th of September morning. Both are big, powerful, and clean. Not for the faint of heart.

Rusty out.

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