Surf Forecasts:
Trespassers surf forecast from 31 Jul 2026:
- Best quality surf: Thursday 6 Aug, 3PM (local time) - 4.5ft (1.3m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 9PM (local time) - 7ft (2.1m), 17s period, SW swell with 2,499 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 6AM (local time) - 3.5ft (1.1m), 12s 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 Tuesday (Aug 04) at 6AM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 0.6m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 2.1m 17s and forecast to arrive on Sunday (Aug 02) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Aug 07) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 4th Aug) | 3.5ft (1.1m) 12s |
| Best Surf | 3PM (Thu 6th Aug) | 4.5ft (1.3m) 16s |
| Most Powerful | 9PM (Sun 2nd Aug) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get one thing straight: this is a reef break for advanced surfers only. Trespassers is the only game in town this month, and it’s a wild ride.
The first good surf comes on Friday afternoon, the 31st of July. We’re looking at a clean 2ft of swell from the southwest, with a long 13-second period that’ll give you some nice, energy-filled lines. The wind is a light cross-offshore from the north, so the face will be tidy. The water is sitting at 58°, which is pretty much normal for this time of year. Combined wave energy is weak at 332, so don’t expect a big push, but it’s a clean start.
Then the weekend gets a bit messy. Saturday the 1st of August has a bit more size – 4ft to 5ft from the SSW, with a long 17-18 second period – but the wind swings cross-shore and gets up to 16 mph, putting a chop on it. The combined energy jumps to 755 and then 1159, so there’s power, but it’s not tidy. Sunday the 2nd is a write-off with onshore winds and rain.
Monday the 3rd of August picks up to 6ft, but it’s a cross-onshore mess with 1402 energy. Not worth it.
The real standout comes on Tuesday the 4th of August. That morning, the wind drops to glassy conditions – just 3 mph from the southeast – and the swell is a clean 4ft from the southwest at 13 seconds. The combined energy is a moderate 550. This is the best window in the whole forecast. The afternoon stays glassy with 3ft at 14 seconds. It’s clean, it’s consistent, and it’s your best bet.
After that, we get a few intermediate days. Wednesday the 5th and Thursday the 6th of August have smaller, cleaner surf (2ft to 4ft), but the winds are cross-off or cross-shore, so it’s okay but not special. The highlight is Thursday afternoon: 4ft of swell from the southwest, 16 seconds, and clean with a gentle breeze. The combined energy is 847, so it’s got a bit of life.
The 7th of August (Friday) sees a jump to 5ft with a very long 18-second period from the southwest. The wind is cross-off from the NNE at 19 mph, so it’ll be clean but powerful. The combined energy hits 1555, which is strong. This is for experts only – the long period will make it wall up at this reef, so the drop-ins will be critical.
The second week gets bigger and nastier. From the 10th of August, we’re looking at 12ft of swell with strong onshore winds and combined energy up to 8468. That’s a massive, messy wall of water. It’s going to be dangerous and awful. The 15th of August has a 12ft swell from the southwest with a 17-second period and cross-shore winds, but the energy is 7477. It’s a beast, but it’s not clean. Only for the hardcore, and even then, it’s a gamble.
Bottom line: Tuesday the 4th of August is your day. Glassy, clean, moderate swell. Get on it.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Sun afternoon. Very mild (max 14°C on Sat night, min 12°C on Fri afternoon). Winds increasing (light winds from the NE on Fri afternoon, fresh winds from the W by Sun afternoon). | Days 5-7 Weather SummaryMostly dry. Very mild (max 15°C on Thu morning, min 10°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Fri 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | ||||||||||||||
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 13 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SSW 21 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SW 16 | SW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 183 | 276 | 751 | 1055 | 1005 | 657 | 592 | 2259 | 1402 | 1049 | 632 | 405 | 407 | 283 | 325 | 404 | 464 | 447 | 844 | 805 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross | cross-on | on | cross-on | cross-on | cross-on | cross | glassy | glassy | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:39AM0.01m | 4:32PM0.02m | 5:23AM0.01m | 4:40PM0.02m | 6:06AM0.01m | 4:45PM0.02m | 6:58AM0.01m | 4:39PM0.02m | 8:18AM0.01m | 4:12PM0.02m | 3:06PM0.02m | |||||||||
Low Tide | 11:26PM0.00m | 9:34AM0.00m | 11:41PM0.00m | 9:59AM0.01m | 11:53PM0.00m | 10:22AM0.01m | 00:02AM0.00m | 10:41AM0.01m | 00:19AM0.00m | 10:34AM0.01m | 00:30AM0.00m | 00:39AM0.00m | ||||||||
 |  | | | |  |  |  |  | |  |  | | | | | | | | | |
 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — |
 | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — |
mm | — | — | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 12 | 12 | 13 | 14 | 13 | 14 | 13 | 13 | 13 | 12 | 11 | 12 | 10 | 13 | 13 | 14 | 15 | 16 | 17 |
Feels °C | 9 | 8 | 7 | 8 | 8 | 5 | 6 | 6 | 7 | 7 | 7 | 9 | 10 | 7 | 9 | 9 | 10 | 10 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | SW 14 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SW 16 | SW 15 |
| kJ | 183 | 276 | 751 | 1055 | 1005 | 657 | 592 | 412 | 1402 | 1049 | 632 | 405 | 407 | 200 | 325 | 404 | 464 | 447 | 844 | 805 |
Swell 2 Height (m) Direction Period (s) | SSW 20 | SSW 13 | ENE 4 | SW 19 | WSW 7 | ENE 4 | NE 5 | — | — | — | SSW 18 | SW 15 | — | SSW 21 | SSW 14 | SW 13 | SW 12 | SW 20 | — | SSW 20 |
| kJ | 149 | 149 | 2 | 96 | 10 | 2 | 1 | — | — | — | 31 | 145 | — | 283 | 180 | 78 | 23 | 62 | — | 485 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NE 5 | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | — |
| kJ | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — |
Wind waves Height (m) Direction Period (s) | — | ENE 2 | NNW 3 | NNW 4 | N 4 | WNW 6 | WSW 7 | SW 16 | — | — | — | — | — | — | NE 3 | N 4 | NNE 2 | NNE 3 | NNW 3 | — |
| kJ | — | 1 | 4 | 8 | 6 | 87 | 302 | 2259 | — | — | — | — | — | — | 2 | 3 | 1 | 1 | 3 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 18 | 100 | 17 | 100 | 651 | 730 | 546 | 368 | 499 | 13 | 0 | 0 | 18 | 100 | 14 | 0 | 14 | 0 | 18 |
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.
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