Surf Forecasts:
Trespassers surf forecast from 14 Aug 2026:
- Best quality surf: Friday 14 Aug, 9PM (local time) - 6ft (1.8m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 12PM (local time) - 6ft (1.9m), 17s period, SW swell with 2,142 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 9PM (local time) - 6ft (1.8m), 16s period with SSW 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 Friday (Aug 14) at 9PM. The primary swell is predicted to be 1.8m and 16s period. 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 1.9m 17s and forecast to arrive on Friday (Aug 21) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Saturday (Aug 15) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 14th Aug) | 6ft (1.8m) 16s |
| Best Surf | 9PM (Fri 14th Aug) | 6ft (1.8m) 16s |
| Most Powerful | 12PM (Fri 21st Aug) | 6ft (1.9m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, let's switch to feet and Fahrenheit.
We’re looking at Trespassers, and it’s a long wait for the real prize. The water is about 58°F, which is normal for this time of year.
The first good window hits Saturday, the 15th of August. We’ve got a solid 6ft SSW groundswell (16-second period) with a cross-offshore breeze. The energy is high at 1322, but it’s an advanced reef, so don’t be a hero.
Sunday the 16th is clean with offshore wind and a 4ft SSW swell, but the energy drops to 614. Monday the 17th is the early winner: 4ft to 4ft SSW swell, 16-second period, and clean offshore winds. The energy is moderate (705 to 952), making for very good surf.
After that, it gets rough. Tuesday through Friday the 21st is a washout with onshore winds and chop. Don’t bother.
Now, for the big one. On Sunday, the 23rd of August, the wind goes glassy, and we get a 7ft SW groundswell. The combined energy is a massive 3025. This is a heavy, powerful wave for experts only. The conditions will be absolutely perfect.
Monday the 24th has a 7ft SSW swell with 18-second period, but with a cross-offshore breeze. Strong energy at 2605, but not as clean as Sunday. The final days of the month show a return to smaller, cleaner surf around 3ft to 4ft, but nothing to get excited about.
Rusty out.
Short Range ForecastMostly dry. Very mild (max 14°C on Fri afternoon, min 11°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Tue night. Very mild (max 16°C on Tue afternoon, min 12°C on Mon night). Winds decreasing (fresh winds from the NNW on Tue night, calm by Wed night). | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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) | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 14 | SSW 14 | SW 14 | SSW 16 | SSW 16 | SW 15 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1809 | 1671 | 1322 | 1098 | 711 | 614 | 553 | 463 | 683 | 832 | 489 | 687 | 464 | 255 | 266 | 305 | 263 | 636 | 620 | 1651 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:36AM0.01m | 4:09PM0.02m | 5:16AM0.01m | 4:06PM0.02m | 5:56AM0.01m | 4:06PM0.02m | 6:39AM0.01m | 3:55PM0.02m | 7:35AM0.01m | 3:32PM0.02m | 2:53PM0.02m | |||||||||
Low Tide | 11:01PM0.00m | 9:35AM0.01m | 11:05PM0.00m | 10:09AM0.01m | 11:10PM0.00m | 10:39AM0.01m | 11:20PM-0.00m | 11:01AM0.01m | 11:29PM-0.00m | 11:06AM0.01m | 11:48PM-0.00m | 00:04AM0.00m | ||||||||
 |  |  | | | | |  | | | | | |  | |  |  | | | | |
 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — |
 | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 14 | 14 | 12 | 14 | 16 | 16 | 14 | 14 | 14 | 14 | 13 | 13 |
Feels °C | 11 | 11 | 11 | 10 | 8 | 8 | 8 | 8 | 11 | 11 | 8 | 9 | 11 | 10 | 11 | 11 | 13 | 10 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 14 | SSW 14 | SW 14 | SSW 16 | SSW 16 | SW 15 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 |
| kJ | 1809 | 1671 | 1322 | 1098 | 711 | 614 | 553 | 463 | 683 | 832 | 489 | 687 | 464 | 255 | 266 | 305 | 234 | 636 | 620 | 952 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 24 | SW 22 | SSW 19 | SSW 18 | ENE 4 | — | — | SW 21 | SW 18 | ENE 4 | W 4 | SW 20 |
| kJ | — | — | — | — | — | — | — | — | 22 | 120 | 248 | 106 | 3 | — | — | 110 | 263 | 1 | 1 | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNW 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — |
Wind waves Height (m) Direction Period (s) | — | — | ESE 2 | SE 3 | ESE 4 | ESE 4 | ESE 3 | SE 3 | — | ENE 3 | ENE 4 | NE 4 | NNW 3 | N 3 | NE 3 | NNE 3 | NNE 4 | NW 4 | N 3 | SW 16 |
| kJ | — | — | 1 | 3 | 16 | 5 | 5 | 3 | — | 3 | 8 | 7 | 3 | 5 | 3 | 3 | 11 | 8 | 1 | 1651 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 13 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 164 | 164 | 100 | 162 | 13 | 13 | 13 | 14 | 546 | 13 |
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.
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