Surf Forecasts:
The groyne surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 10AM (local time) - 4ft (1.2m), 7s period, E swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 1PM (local time) - 6ft (1.9m), 8s period, ESE swell with 406 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 10AM (local time) - 4ft (1.2m), 7s 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 10AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.7m and 8s. 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 1.9m 8s and forecast to arrive on Thursday (Aug 20) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Tuesday (Aug 25) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Fri 21st Aug) | 4ft (1.2m) 7s |
| Best Surf | 10AM (Fri 21st Aug) | 4ft (1.2m) 7s |
| Most Powerful | 1PM (Thu 20th Aug) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for The groyne over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for The Groyne over the next couple of weeks.
It’s gonna be a bit of a flat spell to start with. For the first few days, the wind is all over the shop, mostly cross-onshore, and that swell is messy – you’re looking at poor conditions. The combined energy is moderate, but the wave quality is just not there. Wednesday the 19th and Thursday the 20th are write-offs; rain showers and some clouds with a moderate to gentle breeze making things choppy. Friday morning the 21st is where we finally get a little window. The wind goes glassy, and you’ve got a clean 4ft swell from the east. The energy is low-moderate (232), but that glassy surface is the main appeal. It’s a small, clean wave – not a blower, but probably the best you're gonna get for a quiet session. The water temp here is about average for this time of year, nothing weird.
Saturday the 22nd morning stays glassy with a smaller 3.5ft east swell, but the energy is dropping (139). It’s surfable, but very ordinary. After that, it’s basically a slow fade. Sunday through to the middle of the next week, we’ve got small waves, 1.5ft to 3ft, with light winds and occasional glassy conditions, but the energy is weak (down to 52 at one point). There’s a few clean moments on Tuesday the 25th and Wednesday the 26th mornings with a little cross-off, but the swell is tiny. It’s more of a longboard or funboard kind of window.
The last few days of August and into September see a pulse of bigger swell, but the wind gets nasty. Sunday the 30th afternoon sees a jump to 4.5ft from the southeast, but with a short 5-second period and onshore wind – that’s junk. Monday the 31st through Wednesday the 2nd of September has some moderate energy readings (up to 321), but it’s all cross or cross-onshore with fresh, lumpy winds. The waves will be a mess. 4.5ft to 5ft with a strong breeze is not the one for a clean session. This looks more like a set-up for kiting than a good paddle surf.
Honestly, the standout here is Friday morning the 21st of August – get out early for a glassy, small-wave cruise. Everything else in this 16-day window is either too small, too windy, or too messy to get excited about.
Short Range ForecastModerate rain (total 18mm), heaviest on Tue night. Very mild (max 19°C on Wed morning, min 15°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Sun morning, min 15°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 | E 7 | SE 11 | SE 10 | ESE 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 395 | 320 | 341 | 192 | 346 | 294 | 223 | 155 | 127 | 103 | 134 | 142 | 157 | 130 | 125 | 101 | 99 | 107 | 87 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross | cross-on | cross-on | on | glassy | on | cross-on | glassy | cross-on | glassy | cross | cross-on | cross-on | glassy | cross-on | cross-off |
High Tide | 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 | 6:10AM0.36m | 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 | |||||||
 |  | | |  |  |  | | | | | |  | | | | | | | |
 | — | 6:13 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — |
mm | 13 | 1 | 1 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 19 | 18 | 17 | 19 | 19 | 17 | 19 | 18 | 17 | 19 | 18 | 18 | 20 | 20 | 18 | 20 | 20 | 18 |
Feels °C | 14 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 17 | 18 | 17 | 19 | 20 | 20 | 19 | 20 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | ESE 13 | ESE 11 | ENE 7 | SE 10 | SE 8 | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | ENE 8 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 35 | 74 | 121 | 192 | 133 | 294 | 223 | 155 | 127 | 103 | 134 | 142 | 157 | 130 | 125 | 101 | 99 | 107 | 87 |
Swell 2 Height (m) Direction Period (s) | — | — | — | ENE 7 | ENE 7 | — | SE 10 | SE 8 | SE 8 | E 14 | SE 7 | SSE 8 | SE 7 | SE 7 | S 6 | ESE 9 | SE 9 | SE 10 | S 10 |
| kJ | — | — | — | 99 | 99 | — | 4 | 57 | 33 | 4 | 2 | 6 | 2 | 2 | 1 | 8 | 3 | 4 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 13 | — | — | — | SE 9 | SSE 8 | E 14 | E 12 | E 11 | ESE 10 | ESE 9 | SE 8 | SE 7 | E 11 | E 8 | — |
| kJ | — | — | — | 4 | — | — | — | 20 | 24 | 4 | 3 | 2 | 9 | 7 | 2 | 2 | 2 | 1 | — |
Wind waves Height (m) Direction Period (s) | ESE 8 | E 7 | SE 11 | — | ESE 8 | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 395 | 320 | 341 | — | 346 | 223 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 47 | 47 | 47 | 3 | 47 | 47 | 47 | 0 | 47 | 0 | 0 | 19 | 0 | 1 | 47 | 0 | 0 | 47 | 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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