Surf Forecasts:
Trespassers surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 23 Aug, 12AM (local time) - 6.5ft (2.0m), 16s period, SSW swell with glassy winds.
- Most powerful swell: Saturday 22 Aug, 3PM (local time) - 7ft (2.2m), 18s period, SW swell with 2,842 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 6AM (local time) - 4ft (1.2m), 14s 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 16) at 6AM. The primary swell is predicted to be 1.2m and 14s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 2.2m 18s and forecast to arrive on Saturday (Aug 22) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Aug 18) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 16th Aug) | 4ft (1.2m) 14s |
| Best Surf | 12AM (Sun 23rd Aug) | 6.5ft (2.0m) 16s |
| Most Powerful | 3PM (Sat 22nd Aug) | 7ft (2.2m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer for Trespassers over the next couple of weeks.
We’ve got a decent run of surf kicking off this Sunday, the 16th of August. The early-morning session sees a clean 4ft swell rolling in from the SSW with a 14-second period. The wind is blowing offshore from the east at 12 mph, keeping things clean. The wave energy is moderate (561). This is a solid start, but it’s not the standout.
The real highlight comes on Monday the 17th. The morning session is looking prime. We’ve got 4ft of SSW swell, but the period has bumped up to 16 seconds, giving it more push and shape. The wind is a gentle offshore from the east at 9 mph – glassy conditions. The combined energy is strong (770). This is clean, lined-up, and the best of the early days. Get on it.
By Tuesday the 18th, the swell drops a touch to 4ft, and the wind swings cross-offshore from the NE at 16 mph. It’s still clean, but the energy is fading. Wednesday the 19th through to Sunday the 23rd is a write-off. Onshore winds, lumpy conditions, and poor surf. Not worth paddling out.
We get a brief window of hope on Tuesday the 25th of August. The swell is small, around 3ft from the SSW, but the wind is a light cross-offshore from the SSE at 9 mph. The water is clean, and the combined energy is weak (304). It’s a gentle session, good for a longboard or a fun fish.
The next real standout is a long way off, but it’s worth marking in your calendar. Friday the 28th of August brings a solid pulse of SW swell. The morning shows 10ft at 14 seconds, with a moderate cross-shore breeze from the north at 12 mph. The energy is very strong (3372). This is big, powerful, and only for experienced surfers at Trespassers. The afternoon drops to 8ft and the wind goes light onshore from the WSW. It’s still big, but the conditions are cleaner in the morning. This is the true standout of the whole forecast, but it’s a week and a half away, so keep an eye on it.
The final days trail off with smaller, cleaner swells, but nothing to get excited about until then.
That’s the picture from here. Keep it salty.
- Rusty
Short Range ForecastMostly dry. Very mild (max 15°C on Mon morning, min 12°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Very mild (max 16°C on Tue night, min 12°C on Fri afternoon). Winds decreasing (strong winds from the NNE on Tue night, light winds from the WNW by Thu afternoon). | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 15 | SSW 14 | SSW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 16 | SW 16 | SW 16 | SW 14 | SW 16 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 711 | 561 | 553 | 463 | 748 | 729 | 489 | 687 | 458 | 251 | 229 | 255 | 238 | 489 | 783 | 1082 | 1179 | 2537 | 2262 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 2:19PM0.02m | |||||||||
Low Tide | 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 | 00:16AM0.00m | ||||||||
 |  |  |  | | | |  | |  | | | | | |  | |  | | |
 | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — |
 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 1 | — |
Temp °C | 13 | 13 | 13 | 13 | 15 | 15 | 13 | 14 | 15 | 16 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 |
Feels °C | 8 | 8 | 8 | 10 | 12 | 11 | 9 | 10 | 10 | 8 | 7 | 7 | 10 | 11 | 11 | 12 | 8 | 5 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 16 | SW 16 | SW 16 | SW 14 | SSW 16 | SW 16 |
| kJ | 711 | 561 | 553 | 463 | 748 | 729 | 489 | 687 | 458 | 251 | 229 | 255 | 238 | 489 | 783 | 1082 | 1179 | 709 | 2262 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 24 | SW 22 | SSW 19 | SSW 18 | SSW 16 | — | ENE 4 | SSW 21 | WSW 7 | SW 8 | SSW 16 | SW 20 | SW 18 | — | — |
| kJ | — | — | — | — | 22 | 119 | 248 | 106 | 105 | — | 2 | 43 | 44 | 69 | 164 | 241 | 719 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | NE 4 | SW 18 | SSW 16 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | 164 | 107 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 4 | ESE 4 | E 3 | ESE 4 | ESE 3 | E 3 | ENE 4 | ENE 4 | NNE 4 | N 3 | WNW 5 | WSW 6 | — | — | W 4 | WSW 16 | W 6 | SW 16 | SW 16 |
| kJ | 15 | 5 | 6 | 5 | 3 | 4 | 7 | 12 | 13 | 10 | 38 | 50 | — | — | 9 | 554 | 62 | 2537 | 2242 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 14 | 162 | 18 | 100 | 149 | 161 | 668 | 159 | 14 | 14 | 14 | 14 | 731 | 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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