Marengo Surf Forecast and Surf Report

G’day, Rusty here. We’ve got a solid run of surf ahead at Marengo, but only for the experienced crew – this is not a beginner’s window. The reef and point setup will be handling a powerful, long-period groundswell from the southwest, with the energy building into the moderate-to-strong range. The water temp sits at 57°F which is pretty average for this time of year, nothing unusual.

The action kicks off Friday morning, the 28th of August. The swell is already running at 1.6m from the SW with a long 18-second period, and combined energy is strong at 1536. The wind is light offshore from the west, keeping things clean. This is proper groundswell and it’s pumping, but at 1.6m with that period, the power is serious – this is for experienced surfers only. Friday afternoon stays decent with a cross-off breeze, but the tide window gets a bit questionable.

Saturday the 29th drops a touch to 1.3m, but still solid energy (736) and clean offshore winds in the morning. Great for stronger surfers who want a slightly less heavy session. Sunday the 30th sees the swell bump back up to 2-1.8m, energy climbing above 1000 again (1195-1281), and winds stay offshore. Consistent, clean, and powerful.

Now, the standout of the whole forecast – Monday the 31st of August. Morning has the swell at 1.8m with a 15-second period, combined energy at a meaty 1758, and the wind is light offshore. But the arvo? Glassy. Absolute glass. Wind switches to SSW at 5 km/h, dead calm, clean as a whistle. The swell holds at 1.8m, energy hits 1948. That is the session to clear your diary for. Perfect offshore and glassy conditions, powerful groundswell – a proper gem for those who can handle it.

Tuesday the 1st of September gets messy with strong NNW winds making things cross-off and rough, so quality drops. Wednesday the 2nd bounces back – offshore winds again, swell at 2-2.1m, energy up around 1471-1802. Another excellent window for experienced surfers. Thursday the 3rd stays punchy (2.1m, energy 1688-1618) but winds are cross-off, which takes the shine off a bit.

Friday the 4th of September is a monster – morning has 3.0m with 30 km/h offshore winds, but the afternoon blows out to 6.5m and 22219 energy. That’s way too big for this break, even for experts. Kite surfers might be eyeing it, but for paddle surfing, it’s a no-go.

The following week starts to ease. Saturday the 5th and Sunday the 6th have 2-2.4m and big energy (2175-2883), but winds are cross-off and messy. Monday the 7th of September is another potential standout – glassy offshore winds in the morning with 1.8m swell from the SSW, energy at 838. Clean and inviting, but the swell direction has shifted a bit.

After that, the window gets messy. Tuesday the 8th is onshore and wet – avoid. Wednesday the 9th has clean cross-off winds but the swell is dropping and quality is marginal. The run fades through Thursday the 10th with small 1.0-1.1m swell (543-583). Friday the 11th and Saturday the 12th of September bring new energy – Friday has 2-2.5m with big period (18 seconds) and energy climbing to 3747, but winds are cross-off again. Saturday the 12th is the real late-period highlight: morning offshore winds, 1.9m, 16-second period, energy 2583, and the arvo holds with 2.3m and 17-second period at 3087 – both sessions rated as excellent for experienced surfers. That’s worth waiting for.

Crowds are listed as “sometimes” at Marengo, so you might get a few out, but the power will keep the numbers down.

Keep an eye on Monday the 31st of August and Saturday the 12th of September – those are your best bets. The rest is either too big, too windy, or too small if you’re not in the experienced bracket.

Rusty.

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