Surf Forecasts:
Trespassers surf forecast from 26 Aug 2026:
- Best quality surf: Thursday 27 Aug, 9PM (local time) - 5ft (1.6m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 3AM (local time) - 6ft (1.8m), 17s period, SW swell with 1,882 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 6PM (local time) - 3.5ft (1.1m), 19s 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 Thursday (Aug 27) at 6PM. The primary swell is predicted to be 1.1m and 19s period with a secondary swell of 1.0m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 1.8m 17s and forecast to arrive on Friday (Aug 28) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Aug 31) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 27th Aug) | 3.5ft (1.1m) 19s |
| Best Surf | 9PM (Thu 27th Aug) | 5ft (1.6m) 18s |
| Most Powerful | 3AM (Fri 28th Aug) | 6ft (1.8m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s coming up for Trespassers. This is a serious reef break, advanced territory only, and we’ve got a solid 16-day window to look at.
Right now, the surf is a bit of a write-off. We’ve got some small, messy waves on Thursday the 27th with a moderate cross-shore wind, so don’t get your hopes up. The real action starts to build from Friday the 28th. That morning, we’re looking at a clean 6ft SSW swell with a 16-second period, light cross-offshore wind, and the combined energy is pumping at 1580 (moderate wave energy). It’s a good one for experienced surfers, but it’s not the standout.
The absolute pick of the window, the one you want to circle on your calendar, is Monday the 31st of August. The morning session is looking prime. We’ve got a solid 5ft SSW groundswell, a long 19-second period, and light cross-offshore wind keeping it clean. The combined energy is a strong 1773, and the description says “excellent surf conditions for experienced surfers.” The offshore wind is from the ESE, which works well for this spot’s optimum direction, and with the swell coming from the SSW, it’s going to wrap in nicely. The water temperature feels about average for this time of year, nothing unusual. Crowds are sometimes a thing here, so you might have a few others in the lineup, but it’ll be worth it.
Now, after that, we hit a rough patch. Tuesday the 1st of September blows up with a fresh cross-shore wind, and the quality drops right off. From Wednesday the 2nd through to the 6th of September, it’s a messy mix of onshore winds and building swell. Saturday the 5th has some light rain and a bumpy 6ft swell, but it’s not clean. Sunday the 6th is a write-off – huge 10ft SW swell, but with a fresh cross-onshore wind, it’s just a lumpy, choppy mess. That setup is more interesting for kite surfers than paddle surfers.
But hold on, because the second week has a couple of real gems. The first is Monday the 7th of September. During the morning, we’ll see a 8ft SW groundswell with a 16-second period, and the wind goes glassy – that’s zero wind. The combined energy is a massive 3103 (strong wave energy), and it’s clean. That’s expert territory, but for the right crew, it’s a dream.
The true standout, though, is Tuesday the 8th of September. This is the one. The morning offers an 12ft SW swell with a 16-second period, light cross-offshore wind, and a combined energy of 5418 (very strong wave energy). The afternoon is even better: glassy conditions, same 12ft, a 17-second period, and energy at 6035. Both sessions are rated as “excellent for experienced surfers.” This is big, powerful, clean groundswell. For a reef break like Trespassers, that’s as good as it gets. The direction is spot on.
After that, the wind picks up again on the 9th and 10th, but Thursday the 10th of September afternoon has a clean 6ft SW swell with a 15-second period, light offshore wind, and energy at 2164 – not a bad little session to end the run.
So, to sum it up: the first week’s best is Monday the 31st of August morning. The overall champion, the one you should plan for, is Tuesday the 8th of September. That’s a long-range call, so it’s a bit less certain, but if it holds, it’ll be special.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Fri morning, min 12°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Tue afternoon, min 13°C on Sat night). Winds increasing (light winds from the ESE on Sun afternoon, fresh winds from the N by Tue morning). | ||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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 12 | SW 14 | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 13 | SSW 20 | SSW 19 | SSW 17 | SSW 19 | SSW 18 | SW 16 | SSW 16 | SW 15 | SSW 15 |
Wave Graph | |||||||||||||||||||
114 | 268 | 546 | 1761 | 1580 | 1115 | 623 | 401 | 257 | 212 | 216 | 309 | 890 | 1559 | 1399 | 1031 | 657 | 319 | 632 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross-off | cross-off | off | off | glassy | cross-off | off | off | off | cross-off | cross | cross | cross | cross | on |
High Tide | 3:20AM0.01m | 3:14PM0.02m | 3:45AM0.01m | 3:26PM0.02m | 4:13AM0.01m | 3:34PM0.02m | 4:39AM0.01m | 3:48PM0.02m | 5:14AM0.01m | 3:54PM0.02m | 5:49AM0.02m | 3:49PM0.02m | |||||||
Low Tide | 10:26PM0.00m | 8:00AM0.00m | 10:24PM0.00m | 8:29AM0.00m | 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 | ||||||
— | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | |
— | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 15 | 17 | 17 | 18 | 18 | 18 | 17 | 18 | 16 | 16 | 17 | 14 | 15 | 18 | 19 | 18 | 21 | 20 |
Feels °C | 9 | 11 | 14 | 14 | 16 | 16 | 15 | 15 | 17 | 13 | 14 | 16 | 11 | 11 | 14 | 14 | 11 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 14 | SW 14 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SSW 13 | SW 12 | SSW 12 | SSW 17 | SSW 19 | SSW 18 | SW 16 | SSW 16 | SW 15 | SSW 15 |
114 | 268 | 528 | 1761 | 1580 | 1115 | 623 | 401 | 257 | 212 | 149 | 199 | 890 | 1559 | 1399 | 1031 | 657 | 309 | 632 | |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SW 21 | SW 19 | W 6 | — | — | — | — | SSW 23 | SW 21 | SSW 20 | SSW 19 | SW 21 | SSW 19 | SW 18 | — | NE 4 | SW 18 | W 5 |
86 | 116 | 546 | 3 | — | — | — | — | 52 | 116 | 216 | 309 | 117 | 214 | 154 | — | 1 | 319 | 18 | |
Swell 3 Height (m) Direction Period (s) | SW 24 | — | NE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 7 | WSW 7 |
22 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 25 | 10 | |
Wind waves Height (m) Direction Period (s) | — | NNW 4 | NNW 4 | — | — | — | — | — | — | ESE 2 | ESE 3 | ESE 3 | ESE 3 | NE 3 | NNE 3 | N 3 | NNW 4 | NNW 4 | — |
— | 6 | 10 | — | — | — | — | — | — | 1 | 2 | 1 | 1 | 1 | 2 | 2 | 34 | 16 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 17 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 17 | 17 | 1184 | 67 | 17 |
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.











