Surf Forecasts:
Trespassers surf forecast from 23 Aug 2026:
- Best quality surf: Monday 31 Aug, 12AM (local time) - 5ft (1.6m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 9PM (local time) - 6ft (1.8m), 18s period, SW swell with 2,014 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 6PM (local time) - 2.5ft (0.7m), 13s 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 Monday (Aug 24) at 6PM. The primary swell is predicted to be 0.7m and 13s 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 1.8m 18s and forecast to arrive on Thursday (Aug 27) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Monday (Aug 24) at 3PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 24th Aug) | 2.5ft (0.7m) 13s |
| Best Surf | 12AM (Mon 31st Aug) | 5ft (1.6m) 18s |
| Most Powerful | 9PM (Thu 27th Aug) | 6ft (1.8m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, Rusty here, giving you the lowdown. We’re looking at Trespassers, a reef break for the advanced crew, fairly consistent, and it loves a good SSW swell.
The first few days are a bit of a dud. Monday the 24th has some small swell, 2 to 3 feet from the SW, but the wind is cross-off and the energy is weak (312). Not much to write home about.
Things get a bit more interesting on Tuesday the 25th, but the wind is a strong cross-shore, making it lumpy. The swell bumps up to 6 feet from the SSW with a long 16-second period, and the energy is a solid 2253, but the wind is just messy. It’s not going to be a fun session.
The standout, the real gem, is Monday the 31st of August. We’ve got a clean 5 feet of SSW swell with a 16-second period, packing a punch (energy at 1371). The wind is a light offshore from the ESE, keeping it glassy. This is the best of the lot. The long period groundswell might make it a bit fast, but for a reef break, it’ll be a proper wave. Crowds are listed as “sometimes,” so you might see a few others, but it’s worth it.
After that, Tuesday the 1st of September keeps it clean with a light offshore, and the swell holds at a fun 4 feet from the SW. By the afternoon, the wind goes glassy, which is a rare treat. The energy is a bit lower (584), but the shape should be good.
Then we hit a dry spell. From the 2nd of September through to the 6th, the wind is all over the place, mostly onshore or cross-onshore, and the swell is either too small or blown out. There’s a pulse on the 5th of September, with a 6 feet SW swell, but the wind is light cross-onshore, so it’s going to be bumpy.
The very end of the run, around the 8th of September, shows a big 8 feet SW swell, but with a strong cross-onshore wind, it’s going to be a mess. Only for the die-hards.
So, to sum it up: the best window is Monday the 31st of August and Tuesday the 1st of September. The 31st is the clear winner. Everything else is a bit of a gamble with the wind. Stay tuned, but that’s the story.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Mon morning. Very mild (max 16°C on Sun night, min 11°C on Mon morning). Winds decreasing (fresh winds from the ENE on Mon morning, calm by Tue night). | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Fri morning. Very mild (max 18°C on Thu night, min 12°C on Fri morning). Winds decreasing (fresh winds from the N on Thu morning, calm by Fri night). | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 15 | SW 14 | SW 14 | SSW 13 | SSW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 14 | SW 20 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 496 | 297 | 194 | 219 | 1356 | 1031 | 648 | 444 | 326 | 114 | 272 | 552 | 1925 | 1453 | 1420 | 1179 | 791 | 253 | 277 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | on | on | cross-off | cross-off | cross-off |
High Tide | 2:29PM0.02m | 2:56AM0.01m | 2:43PM0.02m | 3:00AM0.01m | 3:00PM0.02m | 3:20AM0.01m | 3:14PM0.02m | 3:45AM0.01m | 3:26PM0.02m | 4:13AM0.01m | 3:34PM0.02m | ||||||||
Low Tide | 11:45PM0.00m | 11:01PM0.00m | 6:33AM0.00m | 10:36PM0.00m | 7:22AM0.00m | 10:26PM0.00m | 8:00AM0.00m | 10:24PM0.00m | 8:29AM0.00m | 10:29PM0.00m | 9:06AM0.01m | 10:35PM0.00m | |||||||
 |  | | |  |  |  | | | | | |  |  |  | |  | | | |
 | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — |
 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — |
mm | 1 | 8 | 9 | 5 | — | — | — | — | — | — | — | — | — | 11 | 3 | — | 1 | 1 | — |
Temp °C | 16 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 15 | 17 | 18 | 13 | 13 | 14 | 14 | 15 | 14 |
Feels °C | 13 | 7 | 8 | 9 | 7 | 7 | 10 | 10 | 11 | 10 | 9 | 12 | 13 | 9 | 11 | 13 | 10 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | SSW 13 | SW 16 | SSW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 14 | SW 14 | SW 18 | SW 17 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 |
| kJ | 496 | 297 | 194 | 219 | 897 | 334 | 648 | 444 | 326 | 114 | 272 | 390 | 1925 | 1453 | 1420 | 1179 | 791 | 253 | 277 |
Swell 2 Height (m) Direction Period (s) | — | SW 20 | SW 19 | SW 18 | — | — | — | SSW 18 | SW 16 | SSW 15 | SW 21 | SW 20 | — | ENE 4 | W 5 | — | SW 14 | SW 10 | SSW 21 |
| kJ | — | 15 | 57 | 152 | — | — | — | 31 | 67 | 86 | 117 | 552 | — | 2 | 12 | — | 125 | 130 | 44 |
Swell 3 Height (m) Direction Period (s) | — | — | — | ESE 4 | — | — | — | — | — | SW 24 | — | — | — | — | — | — | — | S 20 | SW 21 |
| kJ | — | — | — | 3 | — | — | — | — | — | 22 | — | — | — | — | — | — | — | 8 | 18 |
Wind waves Height (m) Direction Period (s) | — | NNE 3 | ENE 4 | — | SSW 16 | SW 14 | SSE 4 | — | — | — | N 3 | N 4 | NNE 4 | NW 4 | W 5 | — | NE 4 | — | SE 3 |
| kJ | — | 2 | 11 | — | 1356 | 1031 | 2 | — | — | — | 7 | 10 | 10 | 6 | 19 | — | 4 | — | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 18 | 18 | 18 | 13 | 553 | 59 | 11 | 14 | 14 | 14 | 100 | 79 | 100 | 100 | 13 | 14 | 11 | 11 | 339 |
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.
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