
Surf Forecasts:
Trespassers surf forecast from 7 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 12PM (local time) - 10ft (3.0m), 18s period, SW swell with 6,081 kJ wave energy.
Best Forecast Surf Conditions for Trespassers this week:
The most powerful waves expected at Trespassers in the next 16 days are 3.0m 18s and forecast to arrive on Wednesday (Aug 12) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Saturday (Aug 08) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 12PM (Wed 12th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s coming up for us at Trespassers. This is a solid reef break, an advanced wave, and it’s fairly consistent. The water temp is about average for this time of year, nothing unusual there.
We’ve got a pretty rough run to start. The first few days are a write-off, honestly. Saturday the 8th and Sunday the 9th are all blown out with strong cross-shore winds and lumpy, messy conditions. The swell is there, around 4ft to 5ft out of the SW with a long period of 16 seconds, but the wind just ruins it. The combined energy is moderate (912) dropping to lower, but it’s not worth paddling out for.
Monday the 10th sees a big jump in size, with a solid 10ft SW swell (4380 combined energy), but it’s a strong cross-onshore breeze and lumpy. That’s a big, ugly wave for experts only at best, and the wind is just spitting on it. The afternoon goes offshore but the quality is still poor.
Tuesday the 11th and Wednesday the 12th are more of the same – strong winds, messy, and on the 12th we get a massive 10ft SW swell with a very long period of 19 seconds, the combined energy is 7149, but it’s all onshore mayhem. That’s kite-surfing territory, not for us.
Thursday the 13th is a bit of a tease. It’s still onshore, but the wind drops to a gentle breeze. We’ve got a 8ft swell (4105 energy) and the report says marginal surf. It’s big, but the wind is just on it enough to make it messy. Friday the 14th is similar, a cross-onshore chop with 7ft SSW swell.
Now, finally, we get a window. Saturday the 15th morning is the stand-out. The wind goes totally glassy. A calm, glassy morning with a 6ft SSW groundswell (1322 combined energy). That’s clean, long period, and the reef will handle it well. This is the best the whole run has to offer. The crowd is “sometimes” so you might get a few out, but it’s worth it.
The rest of the second week looks promising but less certain. Sunday the 16th and Monday the 17th see clean conditions with light cross-offshore breezes and 4ft to 4ft SW swell. The energy is lower (around 600-700), but clean. Then Tuesday the 18th is another real highlight: a clear day, light cross-offshore wind, and a 5ft SW swell with a period of 17 seconds (1207 combined energy). That’s a beautiful, punchy reef wave. Wednesday the 19th holds up with a moderate breeze but still clean, before the wind swings back onshore on the 20th and the run ends in poor conditions again.
So, if you’re keen, don’t bother with the first week. The absolute best is Saturday the 15th morning for the glassy conditions, and Tuesday the 18th is the other cracker. Get out there.
Rusty.
Short Range ForecastHeavy rain (total 25mm), heaviest during Sat night. Very mild (max 16°C on Sat afternoon, min 11°C on Sun afternoon). Mainly near gales. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Tue afternoon. Very mild (max 15°C on Tue morning, min 10°C on Tue afternoon). Winds decreasing (strong winds from the WSW on Tue night, light winds from the W by Thu afternoon). | ||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 16 | SW 15 | SW 14 | SW 16 | SW 16 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 14 | SW 17 | SW 19 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 |
Wave Graph | |||||||||||||||||||
964 | 883 | 784 | 597 | 636 | 773 | 5669 | 4380 | 2790 | 1366 | 590 | 573 | 3746 | 5953 | 5283 | 3301 | 2692 | 2021 | 1576 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | on | cross-on | on | on | on | cross-on |
High Tide | 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 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | |
— | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | |
mm | 3 | — | — | 9 | 4 | 4 | 5 | — | — | — | — | 4 | 4 | 2 | — | — | — | — | — |
Temp °C | 13 | 14 | 16 | 13 | 14 | 12 | 14 | 13 | 12 | 13 | 15 | 15 | 13 | 14 | 14 | 14 | 15 | 15 | 15 |
Feels °C | 8 | 10 | 13 | 6 | 9 | 9 | 6 | 6 | 6 | 8 | 6 | 6 | 4 | 6 | 7 | 8 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 14 | SW 16 | SW 16 | W 9 | — | SSW 16 | SW 16 | SW 14 | SW 14 | SW 18 | SSW 19 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 |
964 | 883 | 784 | 597 | 636 | 773 | 60 | — | 1141 | 1366 | 590 | 573 | 82 | 1196 | 580 | 3301 | 2692 | 2021 | 1576 | |
Swell 2 Height (m) Direction Period (s) | — | WNW 6 | — | — | — | SSW 21 | — | — | — | — | SSW 14 | SSW 18 | NE 6 | — | — | — | — | — | — |
— | 13 | — | — | — | 300 | — | — | — | — | 178 | 190 | 1 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | NE 5 | — | — | — | — | — | — | — | — | — | E 5 | — | — | — | — | — | — | — |
— | 7 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | N 4 | NNW 4 | N 4 | NNW 4 | WNW 6 | SW 19 | SW 17 | SW 16 | NW 3 | NW 5 | NNW 5 | SW 17 | SW 19 | SW 17 | WSW 15 | WSW 15 | WSW 14 | W 8 |
10 | 16 | 8 | 28 | 20 | 81 | 5669 | 4380 | 2790 | 3 | 68 | 42 | 3746 | 5953 | 5283 | 1976 | 1413 | 1076 | 125 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 100 | 100 | 100 | 100 | 100 | 100 | 380 | 595 | 748 | 160 | 651 | 737 | 553 | 733 | 1197 | 733 | 17 | 722 | 59 |
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.











