Black Rocks Jetty Surf Forecast and Surf Report

G’day, it’s Rusty. We’ve got a cracking run of swell ahead at Black Rocks Jetty on the SW-facing coast, so let’s get into it.

The water’s sitting at 77°, which is a touch warmer than usual for this time of year – nice for a late August session.

We kick off Friday morning (21st August) with a clean 4ft SW swell, a 14-second period, and glassy conditions from a light WNW breeze. The combined wave energy is solid at 611 (moderate), and the surf is looking very good – a perfect start.

That swell builds through Saturday (22nd), with 5ft SW groundswell and the same long period. Morning’s dead calm with glassy conditions, and the energy jumps to 901. By Saturday afternoon, the energy hits 1055 (moderate-strong) and the description says excellent for experienced surfers. This is the first standout – clean, punchy, and rippable.

Sunday (23rd) sees the swell push up to 8ft SW with a 14-second period and glassy conditions all day. The morning energy is 2155 (strong), and afternoon sits at 1895. This is excellent, powerful surf, but at this size it’s for experienced crew only – beginners should sit this one out.

Monday (24th) is the pick of the early run. We’ve got 7–8ft SSW groundswell, a 15-second period (very long), and glassy conditions with zero wind in the morning. Combined energy peaks at 2320 (strong). That kind of period and direction is perfect for this reef break – long, walling waves with plenty of power. Best of the first week, no doubt.

The swell eases into Tuesday (25th) with 5ft SSW, but the morning is still glassy and clean. Energy drops to 874 (moderate). Tuesday afternoon gets a cross-on S breeze at 6 mph, so it’s less appealing.

Wednesday (26th) morning is a bit scrappy with a cross-on wind, but the afternoon brings a surprise: 4ft SW swell with a huge 17-second period and glassy conditions. Energy is 1214 (strong). That’s a very long-period groundswell – it’ll push through nicely at the reef, with clean faces and long waits between sets.

Thursday (27th) gets big and tricky. Morning shows 8ft SSW with a 16-second period, but the wind is onshore from the SSW at 6 mph – energy is a massive 2981, but the wind kills the quality. Afternoon gets a 12 mph cross-onshore from the south, making it choppy. This is more kite-surfing territory than paddle.

Friday (28th) is massive: 13–15ft SSW groundswell, 16-second period. Morning energy is 9288, afternoon 9925 (very strong). But the wind is cross-shore from the SSE at 9–12 mph, putting a cross-chop on the face. It’s a big, raw ocean – again, kite surfers will love it, but paddle surfing is for experts only, and it won’t be pretty.

Saturday (29th) is the absolute standout of the whole outlook. 13ft SSW groundswell, 16-second period, and glassy conditions with light SW wind in the morning and light N wind in the afternoon. Energy is 7635 in the morning and 6080 in the afternoon (both very strong). This is exceptional, heavy, clean surf – for experts only. If you’ve got the skills, this is the day to clear your calendar.

Sunday (30th) drops down to 8ft SSW in the morning with an onshore breeze, but the afternoon cleans up with glassy conditions and 7ft SSW – solid, clean, and good for experienced surfers.

The swell fades through the start of September. Monday 31st August has 3–4ft SSW, glassy, but low energy (327–453). Tuesday 1st September drops to tiny 1ft – not worth paddling out. There’s a gap of a few days with nothing worthwhile.

Wednesday 2nd September picks up again with 3–4ft SW, clean and glassy – good for a longboard or funboard. Thursday 3rd sees 4ft SSW with a 12-second period, moderate energy around 439–527, and clean morning conditions. Friday 4th is messy with cross-onshore wind and small swell.

The run finishes on Saturday 5th September with a 4–5ft SW groundswell, 16-second period, and glassy afternoon conditions. Energy is 1084–1233 (moderate-strong). It’s a quality end to the outlook for experienced surfers.

The best on offer: Monday 24th August and Saturday 29th August – both have powerful, glassy groundswell at Black Rocks Jetty. Saturday 29th is the big one, but it’s serious size.

Rusty.

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