Surf Forecasts:
Trespassers surf forecast from 28 Aug 2026:
- Best quality surf: Monday 31 Aug, 12PM (local time) - 5ft (1.5m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 4 Sep, 3PM (local time) - 6ft (1.9m), 15s period, SW swell with 1,446 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 9PM (local time) - 4.5ft (1.4m), 16s period with SW swell.
Best Forecast Surf Conditions for Trespassers this week:
The surf forecast for Trespassers over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 28) at 9PM. The primary swell is predicted to be 1.4m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 1.9m 15s and forecast to arrive on Friday (Sep 04) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Aug 30) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 28th Aug) | 4.5ft (1.4m) 16s |
| Best Surf | 12PM (Mon 31st Aug) | 5ft (1.5m) 18s |
| Most Powerful | 3PM (Fri 4th Sep) | 6ft (1.9m) 15s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at what’s coming up at Trespassers. We’ve got a solid run of waves ahead, but the wind is going to be the real story. Let’s break it down.
We kick off Friday the 28th of August with a clean 5ft SW groundswell. The period is a long 16 seconds, so this is proper groundswell energy. The offshore east-northeast breeze is light at 6 mph, keeping things glassy. Combined energy is sitting at 1115, which is moderate but packing a punch. Water temp is 58°, pretty much average for this time of year. This is the best on offer for the whole outlook – clean, solid, and consistent.
Saturday the 29th is a great follow-up. The swell drops a touch to 4ft, but it’s still clean with 14-second period from the SW. The east-southeast offshore wind is gentle at 9 mph in the morning, and even lighter in the afternoon. Expect clean, fun waves through the weekend.
Sunday the 30th stays in the same groove. Swell drops a bit more to 3ft, but the period is still good. The offshore wind holds, so the surface will be smooth. A classic small-wave day.
Monday the 31st sees the swell pick back up to 4ft, and the period holds at 16 seconds. The wind shifts to a cross-offshore direction, which is still workable. By the afternoon, the wind goes cross-shore, but it’s light. The wave quality is a little more marginal due to the wind shift, but the energy jumps up to 1553, so there’s plenty of push.
Then we hit a rough patch. From Tuesday the 1st of September right through to the morning of Monday the 7th, the wind turns onshore, cross-onshore, or strong cross-shore. Swell sizes get up there – 8ft to 10ft at times – but with wind speeds of 19 to 31 mph, it’s going to be a washing machine. This stretch is really only for the hardcore, and honestly, the setup looks more interesting for kite surfing than paddle surfing.
We get a brief window of hope on Tuesday the 8th of September. The wind drops to a light cross-onshore, swell is 4ft with a 14-second period, and combined energy is 956. It’s marginal but rideable. That doesn’t last, though. From Wednesday the 9th through Thursday the 10th, the onshore winds return, making for poor, choppy conditions.
Now, looking further out, there’s a promising blip on Friday the 11th of September. Swell bumps up to 5ft with a very long 18-second period from the SSW, and the wind is a light cross-shore from the north at 6 mph. This is a long-range standout – it’s a solid groundswell with clean enough wind. The combined energy is a strong 1652, so expect some proper lines. This is one to keep an eye on, but it’s far out so don’t book the week off yet. Saturday the 12th drops back to 4ft with a cross-shore breeze, so that window closes fast.
So, if you want the best of it, be out there from Friday the 28th through Sunday the 30th. After that, it’s a waiting game for that Friday the 11th possibility.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Fri afternoon, min 12°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 18°C on Mon night, min 12°C on Wed morning). Winds increasing (light winds from the NE on Mon afternoon, fresh winds from the N by Tue morning). | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | SW 16 | SW 15 | SW 14 | SSW 13 | SW 13 | SSW 12 | SSW 19 | SSW 17 | SSW 16 | SSW 18 | SSW 16 | SSW 16 | SW 15 | SSW 15 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 14 | SW 14 |
Wave Graph | ||||||||||||||||||||
1115 | 623 | 469 | 309 | 199 | 190 | 312 | 911 | 740 | 1399 | 957 | 657 | 516 | 372 | 822 | 807 | 672 | 1094 | 877 | 961 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | off | off | off | cross-off | cross | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-on | on | on |
High Tide | 4:13AM0.01m | 3:34PM0.02m | 4:39AM0.01m | 3:48PM0.02m | 5:14AM0.01m | 3:54PM0.02m | 5:49AM0.02m | 3:49PM0.02m | 6:29AM0.02m | 3:39PM0.02m | 7:24AM0.02m | 2:55PM0.02m | ||||||||
Low Tide | 10:29PM0.00m | 9:06AM0.01m | 10:35PM0.00m | 9:35AM0.01m | 10:44PM0.00m | 10:11AM0.01m | 10:54PM-0.00m | 10:42AM0.01m | 11:05PM-0.00m | 11:10AM0.01m | 11:12PM-0.00m | 11:30AM0.01m | 11:26PM-0.00m | |||||||
— | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | |
5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 17 | 17 | 15 | 15 | 16 | 14 | 16 | 17 | 18 | 17 | 18 | 14 | 12 | 13 | 13 | 15 | 15 | 13 |
Feels °C | 16 | 15 | 15 | 14 | 12 | 12 | 13 | 10 | 13 | 14 | 14 | 11 | 14 | 10 | 8 | 8 | 6 | 10 | 9 | 6 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 14 | SSW 13 | SW 13 | SSW 12 | SSW 12 | SSW 17 | SSW 16 | SSW 18 | SSW 16 | SSW 16 | SW 15 | SSW 15 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 14 | SW 14 |
1115 | 623 | 469 | 309 | 199 | 190 | 199 | 911 | 740 | 1399 | 957 | 657 | 516 | 372 | 822 | 807 | 672 | 1094 | 877 | 961 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SW 23 | SW 21 | SSW 20 | SSW 19 | SW 21 | SSW 19 | SW 18 | — | — | NE 4 | SSW 18 | WNW 7 | — | WSW 6 | — | — | — |
— | — | — | 21 | 116 | 149 | 312 | 117 | 480 | 154 | — | — | 3 | 207 | 18 | — | 64 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 4 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | ESE 2 | SE 3 | ESE 3 | ESE 3 | SE 3 | ENE 2 | — | — | NW 4 | NW 4 | W 5 | WSW 5 | WSW 5 | WSW 6 | NNW 4 | — | W 5 |
— | — | — | 1 | 2 | 2 | 1 | 3 | 1 | — | — | 18 | 27 | 25 | 21 | 44 | 52 | 11 | — | 25 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 11 | 0 | 0 | 0 | 18 | 14 | 100 | 651 | 67 | 553 | 14 | 17 | 14 | 733 | 1186 | 1184 |
Best forecast wave conditions in Yorke Peninsula | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Trespassers Surf forecast
The above surf forecast table for Trespassers provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trespassers can be found by selecting the local surf guide option on the grey menu. Our Trespassers 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 (Trespassers) 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 Trespassers 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.
Are you planning a holiday in Yorke Peninsula? If you are looking for accommodation near Trespassers, camping, hotels and holiday cottages in Yorke Peninsula, consider staying in Kingscote which is 86 km (53 miles) away.











