Surf Forecasts:
The groyne surf forecast from 17 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 4.5ft (1.4m), 8s period, E swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 7PM (local time) - 7ft (2.1m), 8s period, ESE swell with 509 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 1AM (local time) - 4.5ft (1.4m), 8s 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 Friday (Aug 21) at 1AM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 0.1m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The groyne in the next 16 days are 2.1m 8s and forecast to arrive on Tuesday (Aug 18) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 7s period and expected on Tuesday (Aug 25) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 21st Aug) | 4.5ft (1.4m) 8s |
| Best Surf | 1AM (Fri 21st Aug) | 4.5ft (1.4m) 8s |
| Most Powerful | 7PM (Tue 18th Aug) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for The groyne over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's cut to the chase. The next couple of weeks are looking pretty flat and messy. We've got a lot of small, weak, and onshore slop on the cards, with only a couple of brief windows where it might be worth suiting up. The swell energy is mostly weak to moderate, and the wind is going to be the main issue for most of the forecast. Don't get too hyped about the long-range stuff either; it's a long way out and looking just as average.
We start things off with a bit of a dud. Tuesday the 18th is a total write-off with onshore winds and lumpy, poor conditions. The swell is around 6ft to 7ft, but it's short-period and choppy, so it's not doing anyone any favors. The energy is moderate, but it's messy and not worth your time. Wednesday the 19th has a touch more size early, around 5ft, with a bit more energy, but the wind is still cross and it's looking marginal at best. The water is a bit colder than normal for this time of year, so a hood might be a good call.
Thursday the 20th is more of the same: small, cross-onshore, and just plain average. Friday the 21st has a small window with light cross-shore winds, but the swell is dropping and weak. The first real highlight comes on Saturday the 22nd morning. The wind goes glassy, and while the swell is only 3ft, it's clean. Energy is low, but it's surfable. This is about as good as it gets in this first stretch.
Sunday the 23rd morning starts out glassy again with a bit of clean 3ft surf, but it's pretty weak. After that, the bottom drops out. There's a big gap from Monday the 24th all the way through the start of the second week where the swell just dies and it's tiny, mostly under 3ft, with onshore winds. That's a long stretch of nothing, so don't bother. There might be a tiny bump around the 30th or 31st, but it's small and weak, not worth planning for.
Honestly, the standout is that Saturday morning session. The groyne is a reef break, and it's fairly consistent, but it's not often you get it with glassy conditions. The swell is only 3ft from the east, but the cleanliness is the selling point. The crowds are possible, so you might have a few mates out. It's the only real opportunity for a decent wave in this whole run. Keep an eye on that, but don't hold your breath for anything else. The rest is a write-off.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Tue morning. Very mild (max 19°C on Wed morning, min 15°C on Wed night). Winds decreasing (fresh winds from the SE on Tue afternoon, calm by Thu night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat night. Warm (max 21°C on Sun morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | ESE 8 | ESE 7 | ESE 8 | SE 8 | SE 8 | SE 10 | SE 9 | ESE 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 375 | 468 | 356 | 270 | 138 | 192 | 249 | 165 | 223 | 155 | 131 | 127 | 112 | 149 | 140 | 101 | 96 | 81 | 61 | 63 | 66 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-on | cross-on | glassy | cross | on | cross | glassy | cross-on | cross-off | glassy | on | cross | cross | cross-on | cross-off |
High Tide | 12:08PM1.43m | 11:44PM1.17m | 1:08PM1.38m | 00:23AM1.02m | 2:20PM1.36m | 1:27AM0.90m | 3:34PM1.38m | 3:10AM0.84m | 4:35PM1.45m | 4:37AM0.87m | 5:22PM1.53m | 5:34AM0.95m | 6:00PM1.62m | ||||||||
Low Tide | 6:19PM0.63m | 6:10AM0.36m | 7:32PM0.72m | 6:55AM0.41m | 9:08PM0.75m | 7:52AM0.45m | 10:44PM0.69m | 9:00AM0.46m | 11:42PM0.60m | 10:06AM0.44m | 00:18AM0.50m | 11:01AM0.40m | 00:48AM0.40m | ||||||||
 | |  | |  | | | |  | | |  |  | | | | | | | | | |
 | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — |
mm | 6 | 2 | 10 | 1 | — | 2 | 3 | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — |
Temp °C | 18 | 18 | 17 | 19 | 18 | 17 | 19 | 19 | 18 | 19 | 19 | 17 | 20 | 19 | 18 | 21 | 19 | 19 | 21 | 20 | 18 |
Feels °C | 14 | 13 | 13 | 15 | 15 | 15 | 16 | 16 | 18 | 19 | 18 | 16 | 19 | 17 | 17 | 20 | 19 | 20 | 20 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | — | — | ESE 13 | ENE 7 | ENE 7 | ENE 7 | SE 9 | ESE 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 |
| kJ | — | — | 35 | 166 | 132 | 102 | 152 | 165 | 223 | 155 | 131 | 127 | 112 | 149 | 140 | 101 | 96 | 81 | 61 | 63 | 66 |
Swell 2 Height (m) Direction Period (s) | — | — | ESE 13 | SE 8 | ESE 11 | E 13 | ENE 7 | ENE 7 | SE 10 | ENE 7 | SSE 8 | E 14 | SE 7 | E 10 | SE 7 | SE 7 | SE 8 | NE 9 | NE 7 | NE 7 | NE 6 |
| kJ | — | — | 67 | 142 | 78 | 4 | 94 | 79 | 4 | 81 | 24 | 4 | 2 | 8 | 2 | 2 | 9 | 3 | 29 | 28 | 19 |
Swell 3 Height (m) Direction Period (s) | — | — | — | ESE 11 | — | E 14 | ENE 9 | — | — | SE 9 | — | E 14 | E 12 | SE 7 | ESE 10 | SSE 7 | — | SE 9 | SE 9 | S 10 | — |
| kJ | — | — | — | 74 | — | 4 | 8 | — | — | 20 | — | 4 | 3 | 2 | 9 | 5 | — | 3 | 3 | 2 | — |
Wind waves Height (m) Direction Period (s) | ESE 8 | ESE 7 | ESE 8 | SE 8 | SE 8 | SE 10 | SE 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 3 |
| kJ | 375 | 468 | 356 | 270 | 138 | 192 | 249 | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 47 | 157 | 47 | 1 | 47 | 1 | 13 | 13 | 0 | 1 | 19 | 0 | 0 | 235 | 0 | 0 | 47 | 0 | 0 | 637 | 0 |
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.
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