Surf Forecasts:
Trespassers surf forecast from 6 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 6AM (local time) - 5ft (1.5m), 18s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 9 Sep, 12PM (local time) - 7ft (2.2m), 18s period, SSW swell with 3,028 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 9AM (local time) - 3ft (0.9m), 13s 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 Monday (Sep 07) at 9AM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.2m and 21s. 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 2.2m 18s and forecast to arrive on Wednesday (Sep 09) at 12PM. 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 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 7th Sep) | 3ft (0.9m) 13s |
| Best Surf | 6AM (Tue 8th Sep) | 5ft (1.5m) 18s |
| Most Powerful | 12PM (Wed 9th Sep) | 7ft (2.2m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s break down what’s coming. We’ve got a solid run of swell ahead, but not every day is a winner. The real magic is gonna be on the days when the wind lines up and the swell has some punch.
The absolute standout is Tuesday morning (September 8th) at Trespassers. Swell is a clean 5ft from the SSW, with a long 17-second period. That’s proper groundswell, with a combined energy of 1352. The wind is glassy – dead calm. This is going to be an incredible session, but it’s a powerful wave, so it’s for experienced surfers only. Water temp is about average for the time of year.
Tuesday afternoon gets ruined by a cross-onshore wind, so don’t bother.
Next up, Thursday morning (September 10th) is excellent. We’ve got a 6ft SSW swell, 16-second period, and a clean cross-off breeze from the SE. Energy is a strong 1713. This is still a big, powerful wave. The afternoon gets an offshore wind from the ESE, which will make it even cleaner, with the swell dropping to 5ft. That’s a very good window.
Moving into the second week, Tuesday morning (September 15th) is another big one. A 6ft SSW swell with a 16-second period and a light cross-off breeze. Energy is strong at 1776. Aim for the morning, as the afternoon picks up a light cross-onshore.
Wednesday morning (September 16th) is also a good option. The swell is a bit smaller at 5ft from the SW, with a 14-second period, but the wind is glassy. Energy is 890. This will be a cleaner, more manageable session.
Finally, Tuesday morning (September 22nd) is promising. Swell is back up to 5ft from the SW, with a long 17-second period and a light cross-off breeze. Energy is strong at 1435. It’s a long way out, so it’s not locked in, but it’s one to watch.
There are a few rough patches in between, especially from the 12th to the 14th and around the 17th to the 19th. Those days are blown out with strong onshore or cross-shore winds. You’d be better off with a kite than a paddle on those days.
Trespassers is a reef break that’s fairly consistent. It’s a heavy wave and can get crowded sometimes, so keep your head on a swivel.
That’s the rundown. Get after it.
Rusty.
Short Range ForecastMostly dry. Very mild (max 14°C on Mon morning, min 10°C on Tue night). Winds increasing (calm on Tue morning, fresh winds from the SSE by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sat night, min 10°C on Thu morning). Winds increasing (calm on Fri afternoon, fresh winds from the N by Sat night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 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 13 | SW 14 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 18 | SSW 16 | SW 16 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 282 | 264 | 828 | 1352 | 1214 | 1586 | 3001 | 2894 | 2263 | 1713 | 1273 | 740 | 576 | 749 | 808 | 632 | 503 | 252 | 464 | 367 | 280 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | glassy | cross-on | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross | cross-on | on |
High Tide | 1:58PM0.02m | 2:19PM0.02m | 3:31AM0.01m | 2:38PM0.02m | 3:27AM0.01m | 2:54PM0.02m | 3:44AM0.01m | 3:06PM0.02m | 4:03AM0.01m | 3:15PM0.02m | 4:29AM0.02m | 3:21PM0.02m | |||||||||
Low Tide | 10:57PM0.00m | 10:30PM0.00m | 6:48AM0.01m | 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 | |||||||||
 | |  |  |  | | | |  | | | | | | | | | | | | | |
 | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — |
 | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 11 | 12 | 12 | 12 | 13 | 12 | 10 | 12 | 13 | 12 | 14 | 15 | 16 | 17 | 19 | 21 | 21 | 22 | 16 |
Feels °C | 11 | 11 | 7 | 11 | 7 | 6 | 6 | 5 | 5 | 8 | 8 | 9 | 12 | 14 | 13 | 13 | 16 | 16 | 14 | 18 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 14 | SW 19 | SSW 17 | SSW 16 | SW 16 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 14 | SSW 16 | SW 16 | SW 15 |
| kJ | 282 | 264 | 828 | 1352 | 539 | 1185 | 3001 | 2894 | 2263 | 1713 | 1273 | 740 | 576 | 749 | 808 | 632 | 503 | 211 | 464 | 367 | 280 |
Swell 2 Height (m) Direction Period (s) | SSW 21 | SSW 21 | SW 13 | — | — | — | — | — | — | — | S 26 | S 25 | S 23 | — | — | — | — | SW 18 | — | — | SW 8 |
| kJ | 45 | 170 | 238 | — | — | — | — | — | — | — | 13 | 13 | 11 | — | — | — | — | 252 | — | — | 16 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SE 3 | SE 3 | SE 4 | — | SSW 16 | SSW 16 | SSE 5 | SE 5 | SE 5 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 3 | ESE 3 | NE 3 | NNW 3 | NE 2 | N 4 | NW 4 | W 5 |
| kJ | 2 | 5 | 7 | — | 1214 | 1586 | 64 | 49 | 34 | 12 | 8 | 16 | 5 | 1 | 1 | 2 | 1 | 1 | 36 | 34 | 21 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 13 | 0 | 11 | 2 | 0 | 553 | 13 | 1197 | 1587 | 14 | 0 | 0 | 0 | 0 | 0 | 18 | 79 | 14 | 14 | 67 | 14 |
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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