Surf Forecasts:
The groyne surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 10AM (local time) - 4ft (1.2m), 7s period, E swell with glassy winds.
- Most powerful swell: Tuesday 25 Aug, 7PM (local time) - 4ft (1.2m), 8s period, E swell with 187 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 0.4m and 9s. 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 1.2m 8s and forecast to arrive on Tuesday (Aug 25) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives.
| 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 | 7PM (Tue 25th Aug) | 4ft (1.2m) 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 cooking.
To be straight with you, this stretch is mostly a slow one for The Groyne. We’re looking at about 10 days where you’re better off waxing a different board or fixing a fin. The first real glimmer of something decent doesn’t pop up until the tail end of August.
Right now, from Friday the 21st of August through Sunday the 30th, the surf is small and junky. Wave heights are mostly 2 to 4 feet out of the east, with short 7 to 9-second intervals. That’s weak, crumbly energy. The wind is onshore or cross-onshore for most of it, chopping up the surface. We get a few glassy mornings—like Friday the 21st and Wednesday the 26th—but the swell is just too small and weak to get your heart pumping. The combined energy is mostly between 90 and 192 (weak to moderate), so not much push.
The one clear standout in the whole 16-day forecast is Monday, the 31st of August. The morning session at The Groyne (reef) is the only time things line up. The swell jumps to a clean 6 feet from the east, still with a short 7-second period. The combined energy hits 265 (moderate), so there’s some weight behind it. The real winner is the wind: a light southwesterly breeze making it cross-offshore and clean. That’ll groom the waves nicely. Water temp is around 68°, which is about two degrees colder than usual for this time of year—a bit chilly, but manageable with a good wetsuit.
After that Monday morning window, the wind gets messy again in the afternoon, and by Tuesday the 1st of September it’s blowing hard from the southwest at 15 mph. Swell holds around 6 feet, but it’s chopped up. That Monday morning is your best bet.
There’s a quick look-in on Friday the 4th of September morning: glassy again with clean conditions, but the swell drops back to 4 feet from the east-northeast. It’s rideable, but nothing special.
So, to sum it up: the next few weeks are mostly about waiting. The one true highlight is that Monday the 31st of August morning session. It’s the only time we get decent swell with clean, glassy conditions. Don’t miss it.
- Rusty
Short Range ForecastMostly dry. Very mild (max 19°C on Fri morning, min 15°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Wed morning, min 16°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 7 | E 7 | E 7 | E 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | ENE 9 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | NE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 155 | 104 | 100 | 103 | 109 | 111 | 135 | 99 | 76 | 58 | 82 | 112 | 123 | 161 | 153 | 121 | 127 | 100 | 181 | 172 | 91 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-off | glassy | on | glassy | cross-on | on | cross-on | cross-on | cross-on | cross-off | cross | cross-on | off | glassy | cross-on | cross-off | cross | cross-on | cross-on |
High Tide | 3:34PM1.38m | 3:10AM0.84m | 4:35PM1.45m | 4:37AM0.87m | 5:22PM1.53m | 5:34AM0.95m | 6:00PM1.62m | 6:17AM1.05m | 6:35PM1.71m | 6:54AM1.17m | 7:08PM1.78m | 7:28AM1.28m | 7:39PM1.82m | ||||||||
Low Tide | 10:44PM0.69m | 9:00AM0.46m | 11:42PM0.60m | 10:06AM0.44m | 00:18AM0.50m | 11:01AM0.40m | 00:48AM0.40m | 11:48AM0.35m | 1:15AM0.32m | 12:30PM0.30m | 1:42AM0.25m | 1:09PM0.26m | 2:09AM0.20m | ||||||||
 | |  |  | | | | |  | | | | | | |  | | | | |  | |
 | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — |
 | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 19 | 18 | 17 | 19 | 18 | 18 | 19 | 19 | 18 | 20 | 19 | 18 | 20 | 20 | 18 | 23 | 22 | 21 | 20 | 20 | 19 |
Feels °C | 17 | 17 | 17 | 18 | 18 | 19 | 18 | 19 | 18 | 19 | 18 | 19 | 20 | 19 | 17 | 22 | 22 | 19 | 18 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 7 | E 8 | E 8 | ENE 8 | ENE 9 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | NE 9 | E 8 |
| kJ | 155 | 104 | 100 | 103 | 109 | 111 | 135 | 99 | 76 | 58 | 82 | 112 | 123 | 161 | 153 | 121 | 127 | 100 | 181 | 23 | 78 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SSE 8 | E 14 | SE 8 | SE 7 | SE 7 | SE 7 | NE 10 | ENE 9 | NE 7 | NE 6 | S 10 | S 6 | S 10 | E 16 | E 15 | E 14 | NE 7 | — | NE 9 | NE 9 |
| kJ | 20 | 24 | 4 | 2 | 2 | 2 | 2 | 4 | 9 | 29 | 14 | 8 | 1 | 8 | 5 | 4 | 4 | 32 | — | 112 | 91 |
Swell 3 Height (m) Direction Period (s) | SSE 9 | — | NE 10 | E 12 | E 11 | SE 10 | E 8 | S 6 | — | E 11 | S 10 | SE 9 | S 10 | — | — | NE 15 | S 9 | E 13 | — | S 8 | — |
| kJ | 7 | — | 4 | 3 | 2 | 4 | 1 | 1 | — | 3 | 2 | 3 | 2 | — | — | 8 | 2 | 4 | — | 1 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 4 | E 8 | SSE 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 172 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 47 | 0 | 13 | 13 | 13 | 1 | 13 | 0 | 1 | 19 | 0 | 0 | 15 | 1 | 1 | 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.
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