Black Rocks Jetty Surf Forecast and Surf Report

G’day, I’m Rusty, and here’s how it’s shaping up for Black Rocks Jetty over the next couple of weeks.

We’ve got a bit of a slow start, but the good stuff builds through the weekend and into next week. This is a reef break, and it’s very consistent, so it doesn’t take much to get it going. The water is sitting at 76° – a touch warmer than normal for this time of year, with a 2° anomaly. Pretty nice.

First real call is Friday afternoon, September 4th. We’re looking at a 5ft SW swell with a very long period of 17 seconds – proper groundswell. Combined swell energy is strong at 1221. The wind’s light cross from the WNW at 3 mph, so conditions are clean, but the wave comment says it’s a bit marginal, likely due to tide. Worth a look if you know the reef.

Saturday morning, September 5th, kicks things up a notch. Swell bumps to 5ft from the SW, period dropping to 14 seconds, but the energy is still strong at 1094. Winds are light cross-off from the NNW at 3 mph – clean as a whistle. This is excellent for experienced surfers. Then Saturday afternoon goes glassy – dead calm, no wind, 5ft SW swell, energy at 733. Really clean, small but fun.

Sunday September 6th keeps that glassy vibe going all day with NW winds at 3 mph, 4ft SW swell, and energy around 659–809. Super clean, small waves – good for a longboard or a finless grovel.

Monday September 7th gets bigger, but the wind turns average. Morning has 7ft SSW swell with 9 mph S cross-on wind, energy at 1715 – that’s moderate energy, but the chop is messy. Afternoon gets worse with 16 mph cross-on – total write-off.

Now, here’s the standout: Tuesday afternoon, September 8th. This is the best on offer. We’ve got a 10ft SSW swell, 15-second period, and combined energy at 7486 – that’s very strong. Winds are light cross-off from the SE at 6 mph, so it’s clean. This is exceptional surf, but it’s for expert surfers only – 10ft on a reef is serious. If you’re not solid, stay on the beach.

Wednesday September 9th keeps the size going. Morning has 13ft SSW swell, 17-second period, and massive energy at 8480 – that’s very strong. Winds are onshore from the SSW at 3 mph, so it’s mixed. Afternoon goes glassy with 12ft SSW swell and energy at 6331 – still huge, but glassy. Again, experts only.

Thursday September 10th drops to a more manageable 6ft SW swell in the morning, glassy with light S wind, energy at 2442 – excellent for experienced surfers. Afternoon goes 6ft from the S, dead calm, glassy – really clean.

From Friday September 11th through to Saturday September 19th, the swell settles into a nice run of 4ft to 7ft SSW swells, mostly glassy or clean winds. There’s a notable session on Sunday morning September 13th – 4ft SW swell with a 19-second period, glassy, energy at 1251 – that’s a long-period groundswell, perfect for this reef. And again on Saturday September 19th morning – 4ft SW swell, 19-second period, glassy, energy at 1187. Those long-period swells will wrap in beautifully here.

Crowds are listed as “sometimes” – at a spot this consistent and with this quality, you can expect company on the best days, especially the standout Tuesday 8th and Wednesday 9th.

So, to sum it up: the best is Tuesday September 8th afternoon (10ft SSW, clean, huge energy) and Wednesday September 9th afternoon (12ft SSW, glassy). Both are for experts only. For the rest of us, the glassy mornings from Saturday 5th through Sunday 6th are sweet, and the long-period sessions around the 13th and 19th are worth circling on the calendar – but those are a week or more out, so keep an eye on the forecasts.

Rusty.

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