Surf Forecasts:
Trespassers surf forecast from 9 Aug 2026:
- Best quality surf: Friday 14 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 10ft (3.0m), 18s period, SW swell with 4,968 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 9PM (local time) - 5.5ft (1.7m), 16s 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 Friday (Aug 14) at 9PM. The primary swell is predicted to be 1.7m and 16s period. 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 3.0m 18s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Sunday (Aug 16) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 14th Aug) | 5.5ft (1.7m) 16s |
| Best Surf | 9PM (Fri 14th Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 6AM (Mon 10th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, listen up. It’s a bit of a tale of two weeks here. We’re starting off pretty grim, but there are a couple of sessions further out that are gonna be worth the wait. Water's about 58°F, which is average for the season.
The first few days are a total washout. From the 9th through the 12th, we've got onshore winds and lumpy, messy surf. There's some size in the water, but it’s just blown out junk. The energy is all over the place, and it's just going to be a battle. Don't even think about it. Just give it a few days.
Things start to settle a bit midweek. Friday the 14th sees the wind ease off, and that 6ft SSW groundswell starts to get some shape. It's still not great, but you can see a light at the end of the tunnel.
Now, here’s your first real window: Saturday morning, the 15th. That’s the one to get. We’ve got a 5ft SSW swell, but the key is the clean cross-offshore wind. It's going to be glassy and well-formed. This is a proper, clean, fun surf. Not huge, but lined up and makeable. This is your best bet for the first week.
Sunday and Monday will be okay, with smaller, clean waves, but they won’t have the same punch as Saturday.
We hit another rough patch mid-week, but the real standout is the Friday morning of the 21st. That’s looking like the pick of the entire forecast. The wind is dead glassy, and we’ve got a 5ft SW swell with some real energy behind it. This is for the experienced crew, as it could get a bit shifty on this reef. This is a “call in sick” kind of morning if it holds up. It's over a week away, so it's a long-range call, but it's a promising one.
The following Sunday, the 23rd, also has potential for a good morning session with another clean 6ft swell.
So, the first week is mostly about waiting it out. There's a good Saturday on the 15th. But the one you really want to keep an eye on is that Friday the 21st. That’s where the magic could happen. It’s a long way off, so keep your fingers crossed and watch the charts.
The surf can be hit or miss here, so a slow start isn't out of the ordinary, but it usually turns back on. We've got some promising windows ahead.
Rusty.
Short Range ForecastHeavy rain (total 26mm), heaviest during Sun afternoon. Very mild (max 15°C on Sun morning, min 12°C on Sun afternoon). Mainly strong winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed morning. Very mild (max 15°C on Fri morning, min 13°C on Wed morning). Winds decreasing (fresh winds from the W on Wed morning, light winds from the WSW by Fri morning). | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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 15 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 13 | SW 17 | SW 17 | SW 17 | SW 16 | SW 15 | SW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 636 | 967 | 4415 | 3996 | 2496 | 1265 | 476 | 628 | 3185 | 3231 | 3111 | 1983 | 1685 | 1396 | 1332 | 1555 | 1536 | 1356 | 1112 | 1083 | 701 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:27PM0.02m | 2:49PM0.02m | 3:25AM0.00m | 3:12PM0.02m | 3:21AM0.00m | 3:33PM0.02m | 3:39AM0.01m | 3:46PM0.02m | 4:07AM0.01m | 3:58PM0.02m | 4:36AM0.01m | 4:09PM0.02m | |||||||||
Low Tide | 00:10AM0.00m | 11:48PM0.00m | 6:22AM0.00m | 11:30PM0.00m | 7:28AM0.00m | 11:17PM0.00m | 8:17AM0.00m | 11:09PM0.00m | 8:54AM0.00m | 11:01PM0.00m | 9:35AM0.01m | 11:05PM0.00m | |||||||||
 |  |  |  | |  |  |  |  |  | |  | | | | | | | | | | |
 | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — |
 | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — |
mm | 2 | 15 | 2 | — | — | — | — | 1 | 6 | 1 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 13 | 14 | 13 | 12 | 13 | 13 | 15 | 12 | 13 | 14 | 14 | 14 | 14 | 14 | 15 | 14 | 13 | 13 | 13 | 12 |
Feels °C | 13 | 10 | 7 | 7 | 6 | 9 | 6 | 8 | 7 | 6 | 8 | 10 | 10 | 11 | 11 | 12 | 12 | 10 | 9 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | WSW 18 | — | SW 16 | SW 16 | SW 14 | SW 13 | SSW 18 | SW 18 | SSW 17 | SW 16 | SW 15 | SW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 |
| kJ | 636 | 967 | 1226 | — | 1031 | 1265 | 476 | 628 | 207 | 449 | 1008 | 1983 | 1685 | 1396 | 1332 | 1555 | 1536 | 1356 | 1112 | 1083 | 701 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SW 19 | — | — | — | — | WSW 6 | SW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 153 | 499 | — | — | — | — | 47 | 327 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | WNW 4 | — | — | — | — | — | — | SSW 19 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 4 | — | — | — | — | — | — | 71 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | SW 19 | SW 17 | SW 16 | WNW 4 | NW 5 | NW 5 | SW 17 | SW 17 | SW 17 | — | — | — | — | — | — | — | — | — | E 4 |
| kJ | 9 | 9 | 4415 | 3996 | 2496 | 13 | 42 | 43 | 3185 | 3231 | 3111 | — | — | — | — | — | — | — | — | — | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 553 | 668 | 1062 | 14 | 613 | 730 | 1034 | 722 | 722 | 160 | 13 | 160 | 13 | 13 | 13 | 0 | 0 | 14 | 0 |
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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