Surf Forecasts:
Trespassers surf forecast from 22 Aug 2026:
- Best quality surf: Sunday 23 Aug, 12AM (local time) - 5ft (1.6m), 15s period, SW swell with glassy winds.
- Most powerful swell: Thursday 27 Aug, 6PM (local time) - 6ft (1.9m), 19s period, SW swell with 2,639 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 12AM (local time) - 5ft (1.6m), 15s 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 Sunday (Aug 23) at 12AM. The primary swell is predicted to be 1.6m and 15s period with a secondary swell of 0.7m and 19s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 1.9m 19s and forecast to arrive on Thursday (Aug 27) at 6PM. 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 3s period and expected on Monday (Aug 24) at 3PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 23rd Aug) | 5ft (1.6m) 15s |
| Best Surf | 12AM (Sun 23rd Aug) | 5ft (1.6m) 15s |
| Most Powerful | 6PM (Thu 27th Aug) | 6ft (1.9m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about the waves on the way at Trespassers – the only show in town for this forecast period. This is an advanced reef break, so we’re not messing around with learner waves. The water temp is sitting about average for this time of year, so nothing wild there.
We’ve got a solid run of surf starting this Sunday the 23rd. The early call is for a clean 5 ft SW groundswell with a very long 17-second period. That’s proper groundswell energy, and the combined energy reading is strong at 1433. This kind of long-period swell can stand up and pitch nicely on a reef like Trespassers. With a light cross-offshore breeze, this is the standout session – excellent for experienced surfers. The afternoon drops a touch to 5 ft but stays clean.
Monday the 24th sees the swell ease back to 3 ft in the morning with moderate energy (312). The wind is cross-off, so it’s still clean but much smaller. By afternoon, the wind goes offshore but the swell is down to 2 ft – rideable but nothing to get excited about.
Tuesday the 25th is a write-off. The swell bumps up to 6 ft in the morning but the wind is howling from the SSW at 15 mph, making it a messy cross-shore chop. Afternoon gets worse with a cross-onshore wind and a 5 ft swell that’s just poor. Combined energy is high (2301 and 1384), but the quality is rubbish.
Wednesday the 26th is a nothing day – small 4 ft swell and light cross-onshore winds. Thursday the 27th gets interesting again though. The morning is small at 2 ft but with a very long 21-second period – that’s a tease, really. The afternoon pumps up to 5 ft with a 20-second period and a combined energy of 1813. The wind is light cross-shore, so it’s marginal but has serious potential if the sets line up.
Friday the 28th is another standout. Morning brings 6 ft SW groundswell at 17 seconds, combined energy at 1713, and a light cross-offshore breeze. Clean, powerful, and for the experienced crew only. Afternoon stays clean with 5 ft and offshore wind – very good surf.
Saturday the 29th is smaller again, 4 ft in the morning and clean, but nothing special. Sunday the 30th has a glassy afternoon session with 4 ft SSW swell and a 16-second period – the combined energy is 1152 and with glassy conditions, that’s a beautiful window if you’re after clean lines.
Monday the 31st has a 6 ft SSW swell in the morning but with cross-shore wind, it’s marginal. Afternoon is similar. From Tuesday the 1st of September onward, things turn ugly. Strong onshore winds and choppy conditions dominate right through to Monday the 7th. There’s a spike of 8 ft on the 7th but with a strong cross-onshore wind, it’s just a big mess – not worth it.
So the two real standouts are Sunday morning the 23rd with that long-period 5 ft SW groundswell and clean conditions, and Friday the 28th with 6 ft of clean, offshore groomed swell. Those are the sessions to circle on the calendar. The rest is either small, windy, or both. Trespassers is fairly consistent, so the gaps aren’t huge, but the second week looks bleak.
Stay on it,
Rusty
Short Range ForecastModerate rain (total 17mm), heaviest on Mon morning. Very mild (max 16°C on Sun night, min 12°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Thu afternoon, min 12°C on Wed afternoon). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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 17 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | SSW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 14 | SW 20 | SW 18 | SW 17 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||
1045 | 1433 | 1018 | 496 | 297 | 194 | 219 | 1498 | 1045 | 589 | 437 | 369 | 139 | 368 | 1379 | 2402 | 1713 | 1317 | 695 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | cross-off | cross-off | cross-off | off | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross | cross | cross-off | cross-off | off | off |
High Tide | 2:21PM0.02m | 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 | |||||||||
Low Tide | 00:18AM0.00m | 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 | ||||||||
— | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | |
— | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | |
mm | — | — | — | 2 | 11 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 14 | 15 | 16 | 12 | 12 | 13 | 14 | 13 | 13 | 13 | 12 | 13 | 15 | 17 | 17 | 17 | 17 | 17 |
Feels °C | 11 | 11 | 13 | 13 | 10 | 9 | 10 | 9 | 8 | 10 | 11 | 9 | 10 | 11 | 14 | 14 | 15 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | SW 16 | SSW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 14 | SW 20 | SW 18 | SW 17 | SW 16 | SW 15 |
1045 | 1433 | 1018 | 496 | 297 | 194 | 219 | 803 | 339 | 589 | 437 | 369 | 139 | 308 | 1379 | 2402 | 1713 | 1317 | 695 | |
Swell 2 Height (m) Direction Period (s) | SW 19 | — | NE 3 | — | SW 20 | SW 19 | SW 18 | — | — | SW 6 | SSW 18 | SW 16 | SSW 15 | SW 21 | SW 14 | — | — | — | — |
380 | — | 1 | — | 15 | 57 | 152 | — | — | 41 | 31 | 41 | 86 | 368 | 434 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | E 4 | — | — | — | — | — | SW 24 | — | — | — | — | — | — |
— | — | — | — | — | — | 3 | — | — | — | — | — | 22 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | NNE 2 | — | — | ENE 2 | ENE 3 | — | SSW 16 | SW 15 | SW 5 | — | — | — | NNW 4 | — | — | — | — | — |
— | 1 | — | — | 1 | 8 | — | 1498 | 1045 | 18 | — | — | — | 3 | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 18 | 0 | 0 | 159 | 13 | 733 | 13 | 14 | 14 | 0 | 17 | 14 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Yorke Peninsula | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











