
Surf Forecasts:
Trespassers surf forecast from 6 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 12PM (local time) - 11ft (3.5m), 19s period, SW swell with 8,069 kJ wave energy.
Best Forecast Surf Conditions for Trespassers this week:
The most powerful waves expected at Trespassers in the next 16 days are 3.5m 19s and forecast to arrive on Wednesday (Aug 12) 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 0.8m 4s period and expected on Saturday (Aug 08) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Wed 12th Aug) | 11ft (3.5m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what’s on the cards for Trespassers. It’s a pretty wild ride through the forecast period, with a long wait for the good stuff.
First off, we’re looking at a stretch of straight-up hostile conditions for the first week. The swell is pumping, but the wind is just brutal. That initial window around Friday the 7th offers a clean 6ft SSW groundswell with a period of 16 seconds and a cross-off breeze, but it’s flagged as marginal. The combined energy is already cooking at 1412, but the conditions just aren't coming together for a proper session.
Then it gets ugly. From Saturday the 8th through to Thursday the 14th, it’s a write-off. We’re talking a mix of onshore gales, strong cross-shore winds, and lumpy, blown-out surf. The swell gets huge—hitting 10ft on Monday the 10th and a massive 12ft on Wednesday the 12th with energy readings climbing well into the 7000s—but that’s for experts only, and even then, the wind is ruining it. There is no quality here, just a lot of angry water. This spot is a fairly exposed reef, so it copped the full brunt.
There’s finally a light at the end of the tunnel. Saturday the 15th is the standout. The morning session is where it’s at: a 6ft SSW groundswell, period of 16 seconds, and glassy conditions with only 3 mph wind. That’s a recipe for clean, lined-up waves at this advanced reef break. The energy is a solid 1517, and the water temperature sits at about 58°F, which is pretty average for this time of year. It’s still going to be a proper challenge, but for the experienced crew, that’s the one.
After that, we get a run of cleaner but smaller days from Sunday the 16th through to Tuesday the 19th. It’s not big, but the cross-off and glassy winds will make for some fun, clean waves in the 4ft to 5ft range.
Then, for the truly patient, there’s another big moment on Friday the 21st of August. A clean 10ft SW swell with a 13-second period hits, with a light cross-off breeze and a combined energy of 2938. That’s an excellent, powerful swell for experienced surfers only. Saturday the 22nd keeps the run going with a clean 7ft swell, also with good wind. Both of these late-month windows are promising, but being that far out, the forecast is a little less certain.
So, bottom line: the first week is a total loss. If you’re waiting for clean waves at Trespassers, circle Saturday morning, August 15th. That’s your best bet for the near future, with the 21st and 22nd looking like another possible window for the big-wave hunters.
Rusty.
Short Range ForecastHeavy rain (total 23mm), heaviest during Sun morning. Very mild (max 16°C on Fri afternoon, min 11°C on Sun morning). Winds increasing (light winds from the NE on Fri afternoon, near gales from the SW by Sun morning). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Tue night. Very mild (max 16°C on Tue afternoon, min 11°C on Tue night). Winds increasing (light winds from the WNW on Mon afternoon, gales from the WSW by Tue night). | ||||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | |||||||||||||||
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 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 16 | SW 15 | SW 18 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 10 | SW 19 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
1412 | 1560 | 964 | 883 | 784 | 658 | 2178 | 2534 | 6409 | 4133 | 2756 | 1366 | 726 | 518 | 1420 | 6866 | 7236 | 4764 | 3515 | 2529 | 1446 | |
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 | cross-on | cross-on | cross-on | on | cross-on | cross | cross | on | on | cross-on | cross-on | on | on | on |
High Tide | 2:07PM0.02m | 2:08PM0.02m | 2:27PM0.02m | 2:49PM0.02m | 3:25AM0.00m | 3:12PM0.02m | 3:21AM0.00m | 3:33PM0.02m | 3:39AM0.01m | 3:46PM0.02m | |||||||||||
Low Tide | 00:42AM0.00m | 00:36AM0.00m | 00:10AM0.00m | 11:48PM0.00m | 6:22AM0.00m | 11:30PM0.00m | 7:28AM0.00m | 11:17PM0.00m | 8:17AM0.00m | 11:09PM0.00m | |||||||||||
7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | |
— | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | |
mm | — | — | 3 | — | 1 | 8 | 9 | 2 | — | — | — | — | — | — | 3 | 2 | — | — | — | — | — |
Temp °C | 14 | 16 | 16 | 15 | 16 | 14 | 12 | 12 | 13 | 13 | 13 | 14 | 15 | 16 | 13 | 14 | 13 | 13 | 14 | 14 | 14 |
Feels °C | 8 | 10 | 11 | 10 | 13 | 8 | 4 | 1 | 3 | 6 | 8 | 9 | 6 | 8 | 4 | 5 | 3 | 5 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | NE 5 | — | — | — | SW 16 | SW 16 | SW 14 | SW 14 | — | SSW 19 | — | — | SW 16 | SW 16 | SW 15 |
1412 | 1560 | 964 | 883 | 784 | 658 | 1 | — | — | — | 2756 | 1366 | 726 | 518 | — | 701 | — | — | 1799 | 2529 | 1446 | |
Swell 2 Height (m) Direction Period (s) | — | NW 5 | ENE 5 | NE 5 | — | — | NNE 5 | — | — | — | — | — | W 6 | E 6 | — | — | — | — | — | — | — |
— | 1 | 9 | 6 | — | — | 2 | — | — | — | — | — | 20 | 2 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NE 5 | — | — | — | — | — | — | SW 12 | — | — | — | — | — | — | — |
— | — | — | — | — | — | 1 | — | — | — | — | — | — | 34 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNW 3 | NNW 4 | N 4 | N 4 | N 4 | WSW 16 | SW 15 | SW 18 | SW 17 | — | NW 5 | NW 5 | NNW 5 | SW 10 | SW 19 | SW 18 | SW 16 | SW 16 | W 10 | W 9 |
1 | 3 | 24 | 17 | 14 | 35 | 2178 | 2534 | 6409 | 4133 | — | 35 | 82 | 59 | 1420 | 6866 | 7236 | 4764 | 3515 | 369 | 189 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 100 | 18 | 100 | 100 | 17 | 100 | 161 | 380 | 595 | 870 | 17 | 67 | 651 | 1034 | 1095 | 1095 | 1040 | 1197 | 748 | 742 | 160 |
Best forecast wave conditions in Yorke Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











