
Surf Forecasts:
Trespassers surf forecast from 9 Sep 2026:
- Best quality surf: Thursday 10 Sep, 3AM (local time) - 6.5ft (2.0m), 16s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 9 Sep, 9PM (local time) - 7ft (2.1m), 17s period, SSW swell with 2,346 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 3AM (local time) - 6.5ft (2.0m), 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 Thursday (Sep 10) at 3AM. The primary swell is predicted to be 2.0m and 16s period. The wind is predicted to be offshore 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 Wednesday (Sep 09) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Wednesday (Sep 09) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 10th Sep) | 6.5ft (2.0m) 16s |
| Best Surf | 3AM (Thu 10th Sep) | 6.5ft (2.0m) 16s |
| Most Powerful | 9PM (Wed 9th Sep) | 7ft (2.1m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Right, let’s have a look at what’s cooking. For the next stretch, the first real window of opportunity opens up on Wednesday the 9th of September, but it’s pretty average to start. That early pulse is a solid 7ft 2in of SSW groundswell, but it’s coming with a fresh cross-offshore breeze, and it’s a bit raw. The water temp is sitting at 59° which is pretty much spot on for the time of year.
After that first pulse, things clean up nicely. Thursday the 10th and Friday the 11th are the pick of the first week. Thursday morning has that swell easing to 5ft 11in, but the wind is properly offshore out of the ESE at 19 mph. The afternoon drops a touch to 5ft 3in, but the easterly is still offshore at 12 mph, and the surf report says it’s going to be very good. Friday is even cleaner with lighter offshore winds, 9 mph and 6 mph, holding that 4ft 3in of SSW swell. The energy is moderate, but the quality is there. These are the days to be out there.
The swell backs off over the weekend, and Sunday the 13th is a write-off with cross-shore winds and poor surf. Monday the 14th is no better with onshore flow. We’re looking at a bit of a dead patch there for a couple of days.
Then Tuesday the 15th brings a fresh pulse of 5ft 7in SSW groundswell. Afternoon is the go, with a gentle offshore breeze and “very good” conditions on the card. That little run holds into Wednesday the 16th as well, with solid energy and light winds. Thursday afternoon the 17th is worth a mention, too – it’s a smaller 3ft 11in, but the wind goes glassy with a slight air, and that’s always a treat.
The swell dips again over the 19th and into the 20th, and it’s not worth chasing. There’s another flat-ish spell until the 22nd, when a 3ft 7in SW swell shows up, but the winds are mixed.
Keep your eyes on the back half of the window. The standout looks like Wednesday the 24th of September. It’s over a week away, so I wouldn’t book the time off just yet, but the models are showing a 6ft 11in SW groundswell, long-period at 15 seconds, and the wind is forecast to be glassy in the morning. The energy is set to be very strong. It’s the biggest, cleanest option on the board. It’s a reef break, and with that size and period, it’s going to have some serious push, so this is one for the advanced crew. It’s a promising long-range call, but we’ll need to see how it firms up.
The rest of the second week is a mixed bag of clean, smaller surf and onshore days. Thursday the 24th afternoon drops to 5ft 7in with a cross-offshore, still fun, but that morning window is the one.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Sat morning, min 9°C on Wed night). Winds decreasing (fresh winds from the SE on Wed afternoon, light winds from the ENE by Fri morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Sat afternoon, min 10°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 18 | SW 13 | SSW 14 | SW 14 | SW 14 |
Wave Graph | ||||||||||||||||||||
2894 | 2263 | 1713 | 1273 | 740 | 674 | 870 | 926 | 832 | 632 | 377 | 464 | 367 | 262 | 162 | 595 | 382 | 1244 | 1138 | 828 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | cross-off | cross-off | off | off |
High Tide | 3:27AM0.01m | 2:54PM0.02m | 3:44AM0.01m | 3:06PM0.02m | 4:03AM0.01m | 3:15PM0.02m | 4:29AM0.02m | 3:21PM0.02m | 5:01AM0.02m | 3:19PM0.02m | 5:27AM0.02m | 3:22PM0.01m | ||||||||
Low Tide | 10:12PM0.00m | 7:49AM0.01m | 10:01PM0.00m | 8:36AM0.01m | 9:57PM0.00m | 9:18AM0.01m | 9:54PM0.00m | 9:56AM0.01m | 10:01PM-0.00m | 10:30AM0.01m | 10:15PM-0.00m | 10:59AM0.01m | 10:29PM-0.00m | |||||||
— | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | |
6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 10 | 11 | 12 | 12 | 15 | 16 | 16 | 18 | 20 | 20 | 20 | 17 | 14 | 15 | 16 | 13 | 12 | 13 | 10 |
Feels °C | 5 | 4 | 6 | 8 | 9 | 13 | 13 | 13 | 13 | 16 | 16 | 16 | 14 | 11 | 12 | 12 | 10 | 8 | 9 | 5 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 13 | SSW 14 | SW 14 | SW 14 |
2894 | 2263 | 1713 | 1273 | 740 | 674 | 870 | 926 | 832 | 632 | 377 | 464 | 367 | 262 | 162 | 76 | 382 | 1244 | 1138 | 828 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | S 26 | S 25 | — | — | — | — | — | SSW 19 | E 3 | NW 4 | W 4 | SSW 19 | SSW 18 | SW 16 | — | — | — |
— | — | — | 13 | 13 | — | — | — | — | — | 136 | 1 | 3 | 2 | 37 | 31 | 130 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | ENE 4 | — | — | — | SSW 16 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 53 | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 5 | SE 5 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 3 | ESE 3 | ENE 3 | NE 3 | NE 2 | NNW 3 | — | — | WNW 2 | SW 18 | SSE 4 | SE 3 | ESE 4 | ESE 4 |
68 | 65 | 22 | 13 | 11 | 5 | 2 | 1 | 1 | 1 | 1 | 7 | — | — | 1 | 595 | 7 | 5 | 5 | 16 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1806 | 339 | 339 | 0 | 11 | 0 | 0 | 0 | 18 | 0 | 14 | 100 | 159 | 13 | 17 | 138 | 13 | 11 | 0 | 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.










