Black Rocks Jetty Surf Forecast and Surf Report

Alright, mates, Rusty here. Let’s get into it. The next couple of weeks have some serious potential, but it’s a bit of a slow burn at first. We’ve got a solid swell window coming up, so let’s break it down day by day.

The opening act kicks off on Friday afternoon, the 21st. It’s not huge, but it’s clean. We’re looking at head-high sets around 4ft from the SW with a 14-second period. The water’s a touch warmer than normal, almost 3°F warmer than the long-term average, so it’s a little treat. Winds are glassy, almost nothing. It’s a good sign of things to come.

Saturday the 22nd, the swell pushes up a notch to 5ft, and the wind stays glassy. Saturday arvo, the wind drops to nothing at all, totally calm and the waves are still pumping. It’s not the biggest, but the quality is there.

Then we hit the first real standout. Sunday the 23rd. The swell jumps to 8ft, still SW, with a 14-second period. The energy is building strong. Glassy conditions in the morning. This is where it starts getting serious. Monday the 24th is the pick of the first week. 8ft of clean SSW groundswell, period up to 15 seconds, and it’s pure glass all day. This is the kind of day you call in sick for. It’s proper, powerful, and clean.

Tuesday the 25th settles a bit, but 6ft of SSW with clean winds is still a great day. We’ve got a little run of good surf through Wednesday the 26th, though it drops to around 4ft. But look at that Wednesday afternoon – a 17-second period is a real long-period groundswell. That’s a sign of something bigger on the horizon, even if the size is small.

Now, hold on to your board shorts, because Thursday the 27th is where things get raw. The swell jumps back up hard, 8ft in the morning, but the wind swings onshore. By the afternoon, it’s 10ft and getting chopped up. It’s big, but it’s messy.

That sets the stage for the biggest days of the entire forecast. Friday the 28th. This is the one to circle. The swell explodes to 13ft and then almost 15ft on Friday arvo, with a brutal 17-second period. The energy readings are off the charts. That’s serious, very strong energy. The wind is cross-shore, which is not ideal, but with that much power, if you’re an expert, this is the session. It’s big, it’s mean, and it’s powerful.

Saturday the 29th, the swell is still massive, 13ft in the morning, but the wind comes right around to the WNW and goes glassy. This is the second standout. Clean, massive, and all for the experts. This is as good as it gets.

After that, the swell backs off through the 30th and 31st, back to the 8ft range and then down to 4ft. Clean, fun, but a step down from the monster days.

Then we hit a bit of a flat patch. From the 1st to the 3rd of September, it’s small. We’re looking at 3ft down to 2ft, weak energy. It’s surfable for a longboard on the right tide, but honestly, it’s pretty ordinary. This is the lull.

The last chance for a pulse comes on September the 4th. The swell jumps back up to 7ft, but the wind is all over the place, cross-shore, and then cross-on shore. It’s a bit of a mess. Then by the 5th, it drops off again to a clean 5ft, but the vibe is winding down.

So, there you have it. The standout days are clearly Friday the 28th and Saturday the 29th. That’s when the big, long-period groundswell hits with real power. Bring your big board and your nerve. The rest is a story of a slow build, a big peak, and then a fade into the ordinary.

Signing off from the beach,
Rusty.

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