Surf Forecasts:
Trespassers surf forecast from 29 Aug 2026:
- Best quality surf: Monday 31 Aug, 12PM (local time) - 5ft (1.5m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Saturday 5 Sep, 3PM (local time) - 8ft (2.5m), 16s period, SW swell with 3,460 kJ wave energy.
- Next surfable swell (1★+): Sunday 30 Aug, 3AM (local time) - 1.5ft (0.4m), 21s 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 Sunday (Aug 30) at 3AM. The primary swell is predicted to be 0.4m and 21s period with a secondary swell of 0.7m and 12s. 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 2.5m 16s and forecast to arrive on Saturday (Sep 05) at 3PM. Winds are predicted to be 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 Friday (Sep 04) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Sun 30th Aug) | 1.5ft (0.4m) 21s |
| Best Surf | 12PM (Mon 31st Aug) | 5ft (1.5m) 18s |
| Most Powerful | 3PM (Sat 5th Sep) | 8ft (2.5m) 16s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the next couple of weeks for Trespassers. It’s a reef break that’s fairly consistent and set up for a south-southwest swell, and it's an advanced wave. The water temp is sitting around 59°F, which is pretty normal for this time of year, so no surprises there.
The window opens up Saturday the 29th. It’s not a big day, we’re looking at a clean 3-foot swell from the SW with a 13-second period, and the energy is weak (278). Wind is a gentle offshore breeze from the ESE, so it’s clean and lined up. Not a standout, but it’s a fun little start to the run.
Sunday the 30th is more of the same, maybe a touch smaller. The morning shows a 3-foot SSW swell (12 seconds), energy still weak (339). The afternoon steps it up a bit with a 2-foot SSW swell but check out the period – 19 seconds of groundswell with energy jumping to 514. That’s a long period for a small wave, meaning it’ll have some punch on the reef. Winds are light offshore, so it’s clean.
Monday the 31st is where things get interesting. Morning brings a 4-foot SSW swell at 16 seconds, and the energy is moderate at 1229. Winds are a gentle cross-offshore from the NE, keeping it clean. The afternoon is the real standout for the first week: 5-foot SSW swell, 18-second period, and energy jumping to 1551. The wind is light and cross-off. This is excellent surf for experienced surfers, and the long period groundswell will really wrap around the reef. This is the best bet in the first week.
Then things go messy. From Tuesday the 1st right through to the 8th, the wind shifts onshore and cross-shore, and the swell gets bigger but the quality disappears. Tuesday the 1st is a write-off with strong cross-shore winds. The wind stays onshore or cross-shore for days, blowing out the surf. Even though the swell builds to 12 feet by the 7th and 8th with huge energy (over 6000), the wind is so bad it’s more of a kite-surfing setup than a paddle session. This is a big gap in quality.
Things start to look up again on the 9th, but it’s still marginal. The afternoon of the 9th shows a 6-foot SW swell at 15 seconds, with a gentle cross-shore wind. It’s not perfect, but it’s a step in the right direction.
The next real standout is shaping up for Saturday the 12th. Both the morning and afternoon are looking excellent. The morning has a 7-foot SSW swell with a 16-second period, moderate offshore wind from the E, and solid energy (2032). The afternoon holds at 6-foot SSW with the same wind and still strong energy (1677). This is a proper session for experienced surfers – clean, powerful, and well-angled.
Sunday the 13th is a nice way to wrap it up. The morning is glassy, with a 5-foot SW swell at 14 seconds. The afternoon stays clean with a cross-offshore breeze and a 4-foot SW swell. It’s a smaller, easier day to finish on.
So, the standout is Monday afternoon the 31st of August for the first week, and Saturday the 12th of September for the second week. Both offer clean, powerful groundswell on the reef, but the Saturday session is the bigger, more consistent wave.
- Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Mon night, min 12°C on Sat night). Winds increasing (light winds from the ESE on Sun afternoon, fresh winds from the NNW by Tue morning). | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Fri morning. Very mild (max 19°C on Tue afternoon, min 12°C on Tue night). Winds increasing (light winds from the NNW on Thu night, fresh winds from the NNE by Fri morning). | |||||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | ||||||||||||||
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 | SW 13 | SSW 12 | SSW 19 | SSW 17 | SSW 16 | SSW 18 | SSW 16 | SW 16 | SW 18 | SSW 15 | SSW 16 | SW 15 | SW 14 | WSW 14 | SW 14 | SW 14 | SSW 15 | SSW 15 | SW 14 |
Wave Graph | ||||||||||||||||||||
257 | 199 | 190 | 312 | 911 | 749 | 1399 | 957 | 551 | 316 | 372 | 1136 | 1561 | 1624 | 1680 | 976 | 907 | 987 | 807 | 2457 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | on | on | on | on | cross | cross-off | cross | on |
High Tide | 4:39AM0.01m | 3:48PM0.02m | 5:14AM0.01m | 3:54PM0.02m | 5:49AM0.02m | 3:49PM0.02m | 6:29AM0.02m | 3:39PM0.02m | 7:24AM0.02m | 2:55PM0.02m | 1:32PM0.02m | |||||||||
Low Tide | 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 | 11:30AM0.01m | 11:26PM-0.00m | 11:34PM-0.00m | ||||||||
— | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | |
6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 1 | 11 |
Temp °C | 17 | 15 | 15 | 16 | 14 | 16 | 17 | 18 | 18 | 19 | 14 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 19 | 16 |
Feels °C | 13 | 12 | 12 | 13 | 11 | 13 | 13 | 14 | 11 | 15 | 10 | 8 | 9 | 8 | 12 | 12 | 14 | 8 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SSW 12 | SSW 13 | SSW 17 | SSW 16 | SSW 18 | SSW 16 | SW 16 | SSW 14 | SSW 15 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 15 | — |
257 | 199 | 190 | 202 | 911 | 749 | 1399 | 957 | 551 | 268 | 372 | 1136 | 1561 | 1624 | 1220 | 976 | 907 | 987 | 807 | — | |
Swell 2 Height (m) Direction Period (s) | SW 23 | SW 21 | SSW 20 | SSW 19 | SW 21 | SSW 19 | SW 18 | — | SSW 20 | SW 18 | SSW 18 | — | — | — | — | — | — | — | NE 5 | — |
21 | 116 | 149 | 312 | 117 | 480 | 152 | — | 38 | 316 | 207 | — | — | — | — | — | — | — | 9 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SSW 18 | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 32 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 3 | ESE 3 | ESE 3 | ESE 3 | ESE 3 | ENE 3 | — | NNE 2 | NNW 4 | NW 4 | WSW 5 | WSW 6 | WSW 5 | WSW 6 | WSW 14 | — | — | N 4 | WNW 5 | SW 14 |
2 | 5 | 2 | 1 | 2 | 2 | — | 1 | 29 | 25 | 34 | 51 | 42 | 54 | 1680 | — | — | 10 | 125 | 2457 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 100 | 1095 | 14 | 553 | 17 | 546 | 498 | 498 | 13 | 14 | 100 | 162 | 730 |
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.











