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) - 6.5ft (2.0m), 19s period, SW swell with 2,772 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 0.8m 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 2.0m 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 0.7m 4s period and expected on Monday (Aug 24) at 6PM.
| 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) | 6.5ft (2.0m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
G'day, Rusty here. Let's have a look at what Trespassers has got in store for us over the next couple of weeks.
The first window of decent surf doesn't really kick off until Sunday the 23rd. Before that, Saturday the 22nd is a write-off – cross-onshore wind and chop, not worth paddling out. So, we've got a bit of a wait.
Alright, Sunday morning the 23rd is where it starts to get interesting. There's a solid 6ft SW groundswell rolling in with a long period of 17 seconds, and the wind is a clean cross-off from the NNE. The wave energy is significant, clocking in at 1433, so there's plenty of push. This is the standout of the whole outlook for me. Trespassers is a reef break, so that long-period groundswell will hold up nicely. It's an advanced wave, so it's not for the faint-hearted, but for those with the skills, it's going to be on.
The clean conditions don't last long, though. Sunday afternoon and Monday see the wind turning and the swell dropping. Monday morning the 24th has a brief moment of glassy conditions with a smaller 3ft SW swell, but the energy is weak (327), so it's more of a longboard option.
After that, we get a messy run. Tuesday the 25th through to Friday the 28th is all strong cross-shore winds and lumpy conditions. The swell size pops up, particularly Thursday afternoon the 27th with a 7ft SW swell (2855 energy) and Friday the 28th with 6-7ft swells (3199 energy), but the wind is just too strong and onshore to make it anything but a battle. The surf quality is poor, and it's a beach and reef setup, so it's looking more like a kitesurfing zone than a paddle-surfing zone during that stretch.
We get a bit of a reprieve on Saturday the 29th morning with a clean cross-off wind and a 5ft SSW swell, but the energy is moderate (989). The real gem in the second week is Sunday afternoon the 30th of August. It's a long way out, so take it with a grain of salt, but the forecast shows a clean 6ft SSW groundswell with a very long 19-second period and a healthy energy of 2219. The wind is a gentle cross-off. That's a serious proposition for experienced surfers at this reef.
The run continues into Monday the 31st with a clean morning and a 5ft SSW swell, but the energy drops a bit to 1081. The water temperature is about average for this time of year, no big anomaly to report.
So, the standout is Sunday morning the 23rd. It's the best balance of size, power, and clean wind. The second-best bet is that promising Sunday afternoon on the 30th, but it's a long-range call. The rest of the week is a mix of marginal conditions, so pick your windows carefully.
Rusty.
Short Range ForecastHeavy rain (total 26mm), heaviest during Mon afternoon. Very mild (max 16°C on Sun night, min 12°C on Sat night). Winds increasing (calm on Sun night, fresh winds from the SSW by Mon night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Thu night, min 12°C on Tue night). Winds decreasing (fresh winds from the S on Tue morning, calm by Tue night). | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
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 15 | SW 15 | SW 15 | SW 17 | SW 16 | SW 15 | SW 14 | SW 14 | SSW 13 | SSW 16 | SSW 15 | SW 14 | SW 13 | SW 13 | SW 15 | SW 21 | SW 19 | SW 18 | SW 16 | SW 16 | SSW 14 |
Wave Graph | |||||||||||||||||||||
1306 | 1140 | 1045 | 1433 | 1018 | 496 | 297 | 191 | 222 | 1273 | 1158 | 731 | 394 | 277 | 114 | 467 | 2527 | 2600 | 1504 | 1224 | 701 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | off | off | cross | cross | cross-on | cross | glassy | cross-on | cross-off | cross | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 2:13PM0.02m | 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 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | |
— | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | |
mm | — | — | — | — | — | 1 | 7 | 11 | 7 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 13 | 14 | 15 | 16 | 12 | 12 | 13 | 14 | 15 | 13 | 13 | 13 | 12 | 15 | 16 | 17 | 17 | 18 | 16 |
Feels °C | 12 | 12 | 11 | 11 | 13 | 13 | 11 | 7 | 9 | 9 | 10 | 9 | 11 | 10 | 9 | 11 | 13 | 13 | 14 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | 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 13 | SW 19 | SW 18 | SW 16 | SW 16 | SSW 14 |
1306 | 1140 | 1045 | 1433 | 1018 | 496 | 297 | 191 | 222 | 886 | 334 | 731 | 394 | 277 | 114 | 295 | 2527 | 2600 | 1504 | 1224 | 701 | |
Swell 2 Height (m) Direction Period (s) | SSW 24 | SSW 21 | SSW 19 | — | — | — | SW 20 | SW 19 | SW 18 | — | WSW 7 | — | SSW 18 | SSW 16 | SW 15 | SW 21 | WSW 14 | — | — | — | — |
54 | 302 | 465 | — | — | — | 15 | 57 | 154 | — | 26 | — | 31 | 26 | 107 | 467 | 257 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SW 20 | — | ESE 4 | — | — | — | — | — | SW 24 | — | — | — | — | — | — |
— | — | — | — | — | — | 15 | — | 6 | — | — | — | — | — | 22 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | E 3 | E 4 | SSW 16 | SSW 15 | SSE 4 | — | — | — | NNW 4 | N 4 | — | — | — | SE 3 |
— | — | — | — | — | — | — | 7 | 7 | 1273 | 1158 | 6 | — | — | — | 5 | 7 | — | — | — | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 13 | 0 | 0 | 0 | 18 | 0 | 18 | 13 | 59 | 59 | 13 | 14 | 14 | 79 | 149 | 17 | 546 | 546 | 466 | 742 |
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.











