Black Rocks Jetty Surf Forecast and Surf Report

Alright folks, Rusty here. Let’s have a proper look at what’s heading our way.

The opening salvos are a bit of a mixed bag. We kick off on Saturday afternoon (August 29) with a solid pulse of groundswell rolling in. The ocean is pumping with a massive 3932 combined swell energy. We’re looking at 10ft of SSW swell with a very long 15 second period. The water is sitting at 77°, which is 4° warmer than normal for this time of year – that’s notably warm. The wind is dead calm and the surface is glassy. This is absolutely serious; it’s a powerful, long-period groundswell and this break needs a south-westerly direction, which this swell nails. At 10ft, this is strictly for the experienced crew. The crowd factor here is listed as "sometimes", so you might get a bit of company, but with waves like these, it’s a price worth paying. This is a standout.

The swell does start winding down. Sunday morning has 8ft SSW with a 14 second period blowing 6 mph onshore from the SSW, making things a bit hairy. The afternoon cleans up with a light cross-shore breeze. By Monday, the swell drops to 4ft and 4ft with some glassy windows, but the energy is fading.

Tuesday September 1 and Wednesday are poor. Swell bottoms out to 1ft and 2ft with very weak combined energy in the 100s. There’s a gap of a few days with no genuine surfing here. We are looking at a three-day lull from Tuesday September 1 right through to Thursday September 3 where the waves are barely worth a paddle. You’d be better off doing a gear check.

Things start to get interesting again come Friday afternoon (September 4). The swell lifts a touch to 2ft with a 14 second period and clean cross-offshore winds from the NNW. The energy is still modest at 230, but it’s a step in the right direction.

The real second pulse arrives on Saturday September 5 through Sunday September 6. Saturday morning has 5ft of SW swell with a 14 second period, but with a light cross-onshore wind, it’s a bit ordinary. The real standout of this stretch hits Sunday afternoon (September 6). Dead calm, glassy conditions, and 5ft of SW swell with a 15 second period. The combined energy is a strong 1248. It’s big enough to be fun, and the wind is perfect. This is a beauty.

Then we get the big one for the experts. Monday morning September 7 is pumping: 7ft of SSW swell with a very long 16 second period and glassy winds. The energy is 1880. This is primo for the experienced surfer. Tuesday September 8 morning is similar: 8ft, glassy, and a 13 second period with 2587 energy. That’s big. The afternoon gets a little messy with a cross-onshore breeze.

Further out, the swell tries to stay alive. Thursday September 10 afternoon sees a lovely glassy window with 8ft of S swell (16 second period) and a massive 4273 combined energy. That’s another serious pulse for the experienced surfer.

By Friday September 11 morning, it’s at its peak again: 10ft SSW swell, 16 seconds, glassy, energy of 4430. That is the biggest and best of the lot for the second week. You’ll want your biggest board and your best wetsuit for this one. The crowd situation is "sometimes," but on a Friday morning, you might have a chance.

The weekend of September 12 and 13 settles down into clean but smaller waves, with 4ft to 3ft of S swell and glassy conditions. Good for a longboard, but nothing special compared to the week prior.

Overall, there are two true standouts here. The first is Saturday afternoon (August 29) – big, clean, powerful. The second is Friday morning (September 11) – even bigger, clean, and with the kind of energy that makes your heart race. Both are for experienced surfers only. Beginners should stay well clear of the 10ft days.

Rusty.

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