Rockpile Surf Forecast and Surf Report

G’day, Rusty here. Look, I’m not gonna sugarcoat it – the next 16 days at Rockpile are a tough watch. We’ve got consistent SW groundswell coming through, often with decent period, but the wind just won’t play ball. It’s a drawn‑out stretch of mainly onshore or cross‑onshore breezes, which means most sessions will be choppy and messy. The water’s sitting at 73°F, which is much warmer than usual for this time of year – that’s over 4°F above average, so you’ll be in boardshorts or a spring suit at most.

We kick off Friday 11 September afternoon with a clear sky but a 9 mph SSW cross‑on wind ruining things. Swell is 3 ft from the SW with a lovely 15‑second period – proper groundswell energy – but it’s blown out. The combined energy is moderate (419). No go.

Saturday 12 September is similar: 3 ft SW, 14‑second period in the morning, dropping to 2 ft in the afternoon. WSW wind at 6 mph keeps it cross‑onshore with small ripples. Poor.

Sunday 13 September: 2 ft SW, 13‑second period. Onshore wind in the morning, light cross‑onshore in the arvo. Still poor.

Monday 14 September sees a short‑period 4 ft W swell (only 8 seconds) on the morning – that’s weak, jumbled energy (410). Onshore wind. Afternoon drops to 2 ft with an 18‑second period, but same onshore breeze. No good.

Tuesday 15 September and Wednesday 16 September stay in the poor category. The only flicker of hope comes Thursday 17 September: cross‑shore winds finally show up (WNW, 9 mph), and the swell holds around 2–3 ft from the SW with 15‑second period. This is the first time we get a bit of shape instead of straight chop. Combined energy hits 355 (moderate). It’s still marginal – I’d give it a casual look, but don’t get excited.

Friday 18 September is the best of a mediocre bunch. Morning has 2 ft SW, 19‑second period – that’s a very long‑period groundswell (549 combined energy, strong). The wind is cross‑shore (WNW, 9 mph), so the reef at Rockpile should groom that energy into some proper, long‑lined walls. Because it’s a reef break, that long period won’t wash out the shape like it would at a beachie. Crowds are likely here, but with the lack of quality overall, it might be quieter than usual. Afternoon stays similar but a touch less energy (424). This is your standout window for the whole outlook – Friday 18 September morning.

Saturday 19 September keeps the SW swell at 3 ft, 18‑second period, but the wind swings back to cross‑onshore (WSW, 6 mph). Combined energy is strong (520), but the bumpy surface kills it. Marginal at best.

Sunday 20 September: onshore wind in the morning (SW, 6 mph) with 3 ft SW, 18‑second period. Afternoon goes cross‑onshore. Energy is solid (542–626), but the wind is the problem. Same story Monday 21 September – light onshore morning, then cross‑onshore afternoon. This is a long stretch of almost‑good that just won’t clean up.

From Tuesday 22 September onward, the swell drops back to 2–3 ft with periods between 12–16 seconds. Winds remain onshore or cross‑onshore. Combined energy fluctuates between moderate and strong, but every single session is scored as poor or marginal. Thursday 24 September afternoon has a faint marginal tick (on 3 ft, SW, 14 seconds), and Friday 26 September finally sees cross‑shore winds again (NW/WNW, 9 mph) but by then the swell is 2 ft with a short 12‑second period – not enough grunt.

The only proper standout across the whole 16 days: Friday 18 September morning. Reef works well with that long‑period SW groundswell, cross‑shore wind gives clean lines, and the energy is strong. It’s not epic, but it’s the best we’ve got. The rest of the run is either blown out or too small to bother.

Stay keen, check the wind obs, and don’t hold your breath.

Rusty

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