Surf Forecasts:
Trespassers surf forecast from 1 Sep 2026:
- Best quality surf: Thursday 3 Sep, 9PM (local time) - 7ft (2.1m), 15s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 12AM (local time) - 10ft (3.0m), 19s period, SW swell with 5,729 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 9PM (local time) - 7ft (2.1m), 15s period with SW 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 03) at 9PM. The primary swell is predicted to be 2.1m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 3.0m 19s and forecast to arrive on Tuesday (Sep 08) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Sep 06) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Thu 3rd Sep) | 7ft (2.1m) 15s |
| Best Surf | 9PM (Thu 3rd Sep) | 7ft (2.1m) 15s |
| Most Powerful | 12AM (Tue 8th Sep) | 10ft (3.0m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m gonna level with you – this 16-day stretch at Trespassers is a proper mixed bag, and most of it is a write-off. We’ve got some serious groundswell, but the wind gods aren’t playing ball for the majority of the run. There are a couple of windows where it cleans up, and one standout that’s worth circling on your calendar.
The first week is pretty much a bust. From September 1st through to the 5th, we’ve got a solid, long-period SSW and SW groundswell pushing in – periods of 14 to 16 seconds, with the wave energy climbing from a moderate 708 up to a strong 3437. But the wind is either onshore, cross-onshore, or a messy cross, making it choppy and lumpy. The 3rd has a 7ft SW swell (14 sec) but with a moderate cross-onshore chop, it’s just not happening. A 4ft clean wave early on the 1st with a fresh cross-shore isn't enough to save it. The water temp is sitting at 59°, just a touch warmer than average for this spot, but that doesn’t help much.
The first real highlight arrives on Sunday, September 6th. We’ve got a clean, cross-offshore breeze from the NE and ENE all day. The morning sees a 6ft SW swell (15 sec) with 1237 combined energy, and the afternoon drops to a clean 5ft SW swell (14 sec). It’s not huge, but the conditions are proper – clean, glassy lines. This is the window.
After that, we get hammered again. The 8th and 9th see massive swell – up to 8ft with periods of 17-18 seconds, and energy readings of 6639 – but it’s accompanied by fresh to strong onshore and cross-shore winds. That’s for the experts only, and even then, it looks more like a kite session than a paddle surf.
Now, the top standout is Thursday, September 10th. Glassy. Yes, glassy. WNW winds at a mere 3 mph. We’ve got a clean 6ft SW groundswell (16 sec) with 1412 combined energy. This is a long-period wave, so at a reef break like Trespassers, it’s going to peel nicely and hold a lot of power. Paddling out will be easier with those longer set gaps, and the shape should be excellent. It’s an advanced wave anyway, but this is the pick of the 16 days without a doubt. The crowds can be *sometimes* a factor here, so get in early.
The 11th and 12th drop off a bit, with smaller 5ft to 4ft SW swells and a light cross-onshore breeze – not terrible, but not the same quality as the 10th. The 13th is small and waning.
The second week gets messy again from the 14th with strong onshores ruining a 5ft SSW swell. The 16th of September shows a glimmer of hope with a clean 4ft SW swell (15 sec) and light cross-offshore winds, but it’s small. Look, if you can only get out once, make it the morning of Thursday the 10th. That’s the one.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Very mild (max 17°C on Tue morning, min 12°C on Wed morning). Winds decreasing (fresh winds from the W on Wed night, calm by Thu night). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Sun night. Very mild (max 19°C on Fri afternoon, min 10°C on Sat night). Winds decreasing (fresh winds from the W on Fri night, calm by Sat night). | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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) | SSW 16 | SSW 14 | SW 15 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 19 |
Wave Graph | |||||||||||||||||||||
641 | 268 | 537 | 933 | 1124 | 834 | 1657 | 1581 | 1785 | 1833 | 1634 | 1042 | 2144 | 2338 | 2037 | 1237 | 721 | 276 | 261 | 715 | 5729 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | on | on | on | cross-on | cross-on | cross-off | cross-off | cross-on | on | cross-on | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross |
High Tide | 3:49PM0.02m | 6:29AM0.02m | 3:39PM0.02m | 7:24AM0.02m | 2:55PM0.02m | 1:32PM0.02m | 1:17PM0.02m | 1:36PM0.02m | 1:58PM0.02m | ||||||||||||
Low Tide | 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 | 11:35PM0.00m | 11:24PM0.00m | 10:57PM0.00m | |||||||||||
6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | |
— | 6:01 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | |
mm | — | — | — | — | — | 1 | — | — | — | 1 | 1 | — | — | — | — | — | — | 8 | 4 | 1 | — |
Temp °C | 17 | 17 | 14 | 13 | 14 | 14 | 14 | 14 | 14 | 16 | 19 | 16 | 13 | 13 | 12 | 15 | 17 | 15 | 15 | 14 | 14 |
Feels °C | 13 | 14 | 12 | 8 | 8 | 8 | 10 | 11 | 10 | 11 | 15 | 12 | 7 | 8 | 10 | 12 | 14 | 13 | 10 | 11 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 14 | SW 15 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SW 14 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | — |
641 | 268 | 537 | 933 | 1124 | 834 | 930 | 1581 | 1785 | 1833 | 1634 | 1042 | 169 | 2338 | 2037 | 1237 | 721 | 276 | 261 | 715 | — | |
Swell 2 Height (m) Direction Period (s) | SSW 20 | SW 18 | WSW 5 | WNW 6 | — | — | — | — | — | — | — | — | — | — | SW 19 | — | NNW 5 | E 4 | SW 21 | SW 20 | — |
38 | 252 | 12 | 4 | — | — | — | — | — | — | — | — | — | — | 95 | — | 2 | 3 | 18 | 107 | — | |
Swell 3 Height (m) Direction Period (s) | — | SSW 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 4 | SW 21 | — |
— | 72 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 18 | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | WNW 6 | — | WSW 5 | WSW 4 | WSW 6 | SW 14 | — | — | NNE 3 | NNW 4 | W 5 | SW 14 | WSW 14 | — | NE 3 | ENE 4 | NNW 4 | NNW 4 | — | SW 19 |
29 | 33 | — | 19 | 20 | 144 | 1657 | — | — | 1 | 11 | 54 | 2144 | 1099 | — | 4 | 13 | 18 | 7 | — | 5729 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 731 | 17 | 13 | 159 | 546 | 731 | 498 | 13 | 0 | 160 | 14 | 760 | 1200 | 1186 | 0 | 0 | 0 | 0 | 212 | 11 | 339 |
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.











