Surf Forecasts:
Trespassers surf forecast from 27 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 0.3m 2s 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
G’day, Rusty here. Let’s talk about Trespassers – this reef setup is going to see a bit of a mixed bag over the next couple of weeks. The water temp is sitting at 59°F, which is about average for this time of year, so nothing unusual there.
The week starts off pretty quiet. Thursday the 27th is a write-off – poor surf conditions with a tiny 3ft SW swell and a cross-shore wind that’s just messy. Not worth paddling out. Friday the 28th is where things start to look up. The morning brings a solid 6ft SW swell with a long 16-second period, and a light cross-off breeze from the ENE keeps it clean. The combined energy is strong (1580), and the faces will have some real push. This is the standout session for the week – excellent for experienced surfers. The afternoon holds up too, with 5ft SW swell going glassy offshore from the east, energy still strong (1115). Saturday the 29th is smaller but still fun: 4ft in the morning with offshore east wind, clean, and a moderate energy of 469. The afternoon goes glassy with a 3ft SSW swell – perfect for a lazy session. Sunday the 30th is tiny but clean, with 2ft to 2ft SSW swell and glassy conditions – light on the energy (443–511) but still a nice paddle.
Monday the 31st brings a solid pulse: 4ft SSW swell in the morning, 15-second period, and a cross-off breeze keeping it clean. Energy jumps to 1223. The afternoon sees 5ft SSW swell with a very long 18-second period (energy 1551), though the wind goes cross-shore, so there’s a bit of texture. Still worth a look.
Then we hit a rough patch. From Tuesday the 1st of September through to Saturday the 5th, conditions turn poor. Winds are strong onshore or cross-shore, and the swell is messy. The 3rd of September sees a big 6–6ft SW swell, but it’s pinned by onshore wind – total washout. Sunday the 6th delivers a huge 10ft SW swell with a long 14–16 second period, and the morning is clean with a light cross-off breeze. That’s huge energy (3232–4218) – easily the biggest swell of the outlook. But at 10ft, this is only for experts. The afternoon gets some rain and a moderate cross-off, making it a bit more marginal. This is the standout for the second week, but it’s a heavy, powerful swell – not for the faint-hearted.
After that, the wind turns bad again. Monday the 7th through to Wednesday the 9th is all cross-onshore or onshore, with swell holding around 7–10ft and energy through the roof (2000–3558), but the onshore wind makes it choppy and messy. Thursday the 10th and Friday the 11th finally see a return to cross-shore winds, with 6–7ft SW swell and decent energy (1636–2157), but it’s still pretty bumpy.
So, the pick of the whole window is Friday the 28th morning – that 6ft SW groundswell with clean offshore winds is the best you’ll get. Second best is Sunday the 6th morning for the big-swell hunters, but only if you’re experienced. For the rest, pick your windows carefully.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Fri morning, min 13°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 12°C on Tue night). Winds increasing (calm on Sun afternoon, fresh winds from the NNW by Tue morning). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | SW 14 | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 20 | SSW 19 | SSW 17 | SSW 15 | SSW 18 | SSW 16 | SSW 16 | SSW 14 | SW 15 | SSW 15 | SSW 14 | SW 14 |
Wave Graph | |||||||||||||||||||||
308 | 546 | 1761 | 1580 | 1115 | 623 | 469 | 257 | 241 | 253 | 315 | 911 | 791 | 1399 | 969 | 657 | 330 | 666 | 840 | 626 | 904 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-off | off | off | off | glassy | off | off | glassy | off | cross-off | cross | cross | cross | on | cross-on | on | on | on |
High Tide | 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 | 6:29AM0.02m | 3:39PM0.02m | ||||||||
Low Tide | 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 | 11:10AM0.01m | 11:12PM-0.00m | ||||||||
6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | |
— | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 17 | 17 | 18 | 18 | 17 | 17 | 17 | 17 | 16 | 17 | 16 | 16 | 17 | 18 | 17 | 19 | 14 | 13 | 12 | 13 |
Feels °C | 10 | 15 | 15 | 16 | 16 | 13 | 15 | 16 | 14 | 14 | 16 | 14 | 14 | 14 | 13 | 11 | 13 | 11 | 8 | 6 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 12 | SSW 12 | SSW 17 | SSW 15 | SSW 18 | SSW 16 | SSW 16 | SSW 14 | SW 15 | SSW 15 | SSW 14 | SW 14 |
308 | 528 | 1761 | 1580 | 1115 | 623 | 469 | 257 | 241 | 190 | 196 | 911 | 791 | 1399 | 969 | 657 | 330 | 666 | 840 | 626 | 904 | |
Swell 2 Height (m) Direction Period (s) | SW 21 | SW 19 | WSW 6 | — | — | — | — | SW 23 | SW 21 | SSW 20 | SSW 19 | SW 21 | SSW 20 | SW 18 | — | ENE 4 | SW 18 | SW 15 | — | — | — |
116 | 546 | 4 | — | — | — | — | 21 | 116 | 253 | 315 | 117 | 432 | 152 | — | 2 | 252 | 176 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | NE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | NNW 4 | — | — | — | — | — | — | — | — | — | — | — | — | N 2 | NNW 4 | WNW 5 | WSW 5 | WSW 5 | WSW 5 | WSW 5 |
3 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 42 | 49 | 27 | 39 | 66 | 50 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 100 | 1186 | 1095 | 59 | 595 | 595 | 14 |
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.











