
Surf Forecasts:
The groyne surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 7PM (local time) - 2ft (0.6m), 9s period, E swell with offshore winds.
- Most powerful swell: Tuesday 18 Aug, 1PM (local time) - 7ft (2.2m), 8s period, ESE swell with 542 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 7PM (local time) - 2ft (0.6m), 9s period with E swell.
Best Forecast Surf Conditions for The groyne this week:
The surf forecast for The groyne over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 12) at 7PM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.3m and 2s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at The groyne in the next 16 days are 2.2m 8s and forecast to arrive on Tuesday (Aug 18) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 3s period and expected on Wednesday (Aug 12) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Wed 12th Aug) | 2ft (0.6m) 9s |
| Best Surf | 7PM (Wed 12th Aug) | 2ft (0.6m) 9s |
| Most Powerful | 1PM (Tue 18th Aug) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for The groyne over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s shapin’ up for The Groyne in the next 16 days.
The pattern is a long, flat spell with one real gem hidden in there. The water temp is about 69°F, which is a touch below normal for this time—about 1°F cooler than average, so nothin’ dramatic, but it’s a bit on the brisk side.
We start Wednesday, 12th August, with a piddly 2ft easterly swell at 9 seconds. The early morning is glassy—clear sky and a light WNW breeze at 3 mph, so it’s clean but tiny. The energy is weak (77). By afternoon, the wind turns cross-onshore from the NNE at 12 mph, and it gets choppy and messy. Not worth the effort. Thursday through Sunday the 16th is a total dud. Swell stays under 3ft, with short-period junk and onshore winds killin’ any chance of shape. The energy is low, mostly under 100. Saturday the 15th bumps up to 4ft, but it’s accompanied by rain showers and a lumpy, cross-onshore mess. No thanks.
Monday the 17th and Tuesday the 18th get bigger—up to 7ft on Tuesday—but the wind is still cross-onshore, choppy, and the energy jumps to 510. That’s got some grunt, but with the wind, it’s more of a kite-surfing show than a clean paddle session.
Here’s the moment you’ve been waitin’ for. The morning of Friday, 21st August. Dead calm—NNE wind at 0 mph, glassy as a mirror. A 5ft easterly swell at 9 seconds, with energy at 330. The swell direction is east, which is close to the optimum southeast for this reef. The Groyne is a fairly consistent reef break, good for intermediates. With that glassy surface, the waves will be clean and fun. Crowds can be a factor sometimes, so get there early. This is the best shot you’ve got—clean, solid, and no wind.
After that, Saturday the 22nd through Wednesday the 27th fades back into smaller, wind-affected slop. The 22nd and 23rd have 4ft to 4ft easterly swell at 10 seconds, but the wind is onshore or cross and choppy. Monday the 24th has a brief offshore from the west at 9 mph with 3ft swell, but it’s weak. The 26th afternoon shows a clean offshore from the WSW with a 4ft NNE swell, but it’s only 5 seconds—short and weak. Not a gem.
So, plain and simple: the first week is a bust, with a long gap of nothing good until that Friday the 21st morning. That’s your one true standout. After that, it’s back to small and ordinary. Keep your fingers crossed for the long-range, but right now, that Friday is the day.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 21°C on Wed morning, min 12°C on Wed night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Mon night. Very mild (max 18°C on Sat morning, min 15°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SSE 5 | SE 6 | SE 6 | SSE 5 | SE 5 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | ESE 6 | ESE 7 | ESE 8 | ESE 8 | ESE 8 |
Wave Graph | |||||||||||||||||||||
60 | 61 | 60 | 41 | 41 | 41 | 36 | 58 | 86 | 33 | 96 | 172 | 108 | 132 | 131 | 131 | 128 | 335 | 507 | 494 | 419 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:03PM2.00m | 8:21AM1.42m | 8:45PM1.95m | 9:05AM1.49m | 9:24PM1.85m | 9:48AM1.52m | 10:01PM1.70m | 10:32AM1.51m | 10:36PM1.53m | 11:17AM1.48m | 11:10PM1.35m | 12:08PM1.43m | 11:44PM1.17m | ||||||||
Low Tide | 1:25PM0.09m | 2:36AM0.15m | 2:14PM0.09m | 3:13AM0.14m | 3:01PM0.14m | 3:49AM0.16m | 3:47PM0.24m | 4:24AM0.20m | 4:33PM0.36m | 4:58AM0.25m | 5:22PM0.50m | 5:33AM0.30m | 6:19PM0.63m | ||||||||
6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | |
— | 5:24 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:27 | — | — | 5:27 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | 1 | 7 | 2 | 2 | 5 | 2 | 2 | 9 | — | 2 | 2 |
Temp °C | 21 | 19 | 14 | 20 | 19 | 16 | 18 | 18 | 17 | 18 | 18 | 17 | 17 | 18 | 16 | 17 | 18 | 18 | 19 | 18 | 17 |
Feels °C | 19 | 15 | 8 | 16 | 15 | 14 | 14 | 15 | 14 | 14 | 13 | 12 | 13 | 14 | 13 | 13 | 15 | 14 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 5 | E 9 | E 9 | E 10 | E 10 | E 8 | E 10 | ENE 9 | E 13 | E 13 | — | — |
60 | 61 | 60 | 41 | 41 | 41 | 26 | 26 | 25 | 12 | 27 | 27 | 17 | 17 | 23 | 16 | 28 | 3 | 3 | — | — | |
Swell 2 Height (m) Direction Period (s) | NE 7 | NE 6 | NE 6 | NE 7 | NE 7 | SSE 8 | NE 7 | NE 9 | NE 9 | E 9 | — | — | ENE 8 | ENE 7 | E 15 | E 8 | NE 8 | — | — | — | — |
15 | 15 | 9 | 8 | 2 | 6 | 2 | 3 | 3 | 26 | — | — | 11 | 11 | 4 | 11 | 2 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | E 11 | S 10 | E 11 | NE 10 | SSE 7 | NE 7 | E 9 | NE 9 | — | NE 8 | — | — | E 16 | E 15 | — | SE 8 | E 13 | — | — | — | — |
2 | 8 | 2 | 4 | 5 | 2 | 2 | 3 | — | 3 | — | — | 5 | 4 | — | 3 | 4 | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 3 | — | SSW 4 | SW 3 | SSE 3 | SE 4 | SSE 5 | SE 6 | SE 6 | SSE 5 | SE 5 | SE 6 | SE 6 | SE 6 | SE 6 | SE 6 | ESE 6 | ESE 7 | ESE 8 | ESE 8 | ESE 8 |
2 | — | 11 | 6 | 1 | 9 | 36 | 58 | 86 | 33 | 96 | 172 | 108 | 132 | 131 | 131 | 128 | 335 | 507 | 494 | 419 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 157 | 1 | 15 | 47 | 3 | 157 | 157 | 136 | 157 | 293 | 47 | 157 | 47 | 15 | 47 | 47 | 47 | 47 | 47 | 13 |
Best forecast wave conditions in Sunshine Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the The groyne Surf forecast
The above surf forecast table for The groyne provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The groyne can be found by selecting the local surf guide option on the grey menu. Our The groyne surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (The groyne) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for The groyne may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.











