Marengo Surf Forecast and Surf Report

Alright, Rusty here. Let’s have a look at what’s on the table for the next couple of weeks.

Right off the bat, we’ve got a solid run of surf kicking off this Wednesday morning. The water is sitting at 57.7°F, which is a touch warmer than usual for this time of year—a nice little bonus if you’re not in a full wetsuit.

The main event is Marengo, a reef and point break that’s fairly exposed to the swell. It's a beginner-friendly spot, but don’t let that fool you; there’s some serious energy coming through. We start Wednesday morning with a 9.8ft SSW groundswell, with a very long period of 15 seconds. That’s a lot of water moving, with combined swell energy of 3804 – moderate to strong. The wind is a cross-off from the SSW at 12.4 mph, keeping things reasonably clean, but the size and power here mean it’s really only for the experienced crew. The wave comment flags questionable tide conditions, so keep your wits about you.

Thursday morning sees the swell drop a touch to 6.6ft from the SSW, period still a healthy 14 seconds. The energy drops to 1644 but it’s still solid. The real standout on Thursday is the afternoon: a 6.2ft SSW swell, period easing to 14 seconds, but the wind swings to a clean offshore from the WSW at 12.4 mph. That’s a sweet window – moderate offshore and clean – and the forecast expects very good surf conditions.

Friday afternoon is another highlight. We’ve got 6.6ft from the SW, 16-second period, and the wind is WNW at 12.4 mph – offshore and clean. The energy is 1962, and the report calls for excellent conditions for experienced surfers. This is shaping up as one of the better windows.

Saturday, 19th of September, is the big one. Morning brings a solid 11.5ft swell from the WSW, period of 13 seconds, with a clean offshore W wind at 15.5 mph. The combined energy is a whopping 5457 – strong stuff. This is expert territory, hands down. The afternoon is still pumping with 9.8ft and energy at 4050. If you’ve got the skills and the gear, this is the standout of the whole run.

Things settle down a bit on Sunday, with the swell backing off to 4.3ft. The wind gets fresh, 21.7 mph from the NNW in the morning and W in the afternoon. It’s clean enough but the energy is way down (around 676), so it’s more of a rest day.

Monday sees the swell bump back up to 6.2ft in the morning and 7.9ft in the afternoon, both from the SW with 14-16 second periods. The afternoon energy jumps to 4074. The wind is a cross-off from the SW at 12.4 mph. It’s all clean, but the wave comment still flags marginal conditions. Worth a look, but not the prime pick.

Tuesday, 22nd of September, is another standout. Morning has 9.8ft from the SSW, 16-second period, energy at 5109. The afternoon is even better: 9.8ft from the SW, 16 seconds, and a gentle cross-off breeze from SSW at 9.3 mph. The energy is 5441, and the forecast calls for excellent conditions for experienced surfers. This is a serious, powerful groundswell window.

From Wednesday the 23rd onward, things get unreliable. The wind turns onshore from the ENE, the size drops steadily, and the quality falls away. By Thursday and Friday the 24th and 25th, we’re down to 3.3ft or less, with onshore wind and low energy. There’s a brief, glassy moment on Friday morning (25th) with a tiny 2.3ft swell, but it’s barely worth paddling for.

The following week shows a little pulse of life around Saturday the 26th of September, with a 5.9ft swell from the SW carrying a very long 19-second period. The energy hits 2169, but the wind is cross-shore from the NNE, creating some chop. Not perfect, but interesting.

We get another clean shot on Sunday the 27th of September afternoon, with a 5.6ft SW swell, 16-second period, and fresh offshore wind from the WSW at 12.4 mph. The energy is moderate at 1464, and the report calls for excellent conditions for experienced surfers.

The last few days of the run into early October are all in the 3.3ft to 5.6ft range, with good offshore wind from the W/NW. The period stays long, around 15 to 16 seconds. Thursday the 1st of October afternoon looks the best of this tail-end stretch, with 5.6ft from the SW, 16-second period, moderate offshore wind at 15.5 mph, and excellent conditions for experienced surfers.

So, to wrap it up

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