Surf Forecasts:
Trespassers surf forecast from 5 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9AM (local time) - 5ft (1.5m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 12PM (local time) - 7ft (2.2m), 19s period, SSW swell with 3,376 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 12PM (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 12PM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.4m 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 19s 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+) | 12PM (Mon 7th Sep) | 3ft (0.9m) 13s |
| Best Surf | 9AM (Tue 8th Sep) | 5ft (1.5m) 17s |
| Most Powerful | 12PM (Wed 9th Sep) | 7ft (2.2m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the next couple of weeks.
The early part of the window is a write-off, I’m afraid. The first few days are junked up with howling onshore winds, and the swell is jumbled and messy. We’re looking at the 5th and 6th of September being a total loss. Honestly, you wouldn’t want to be out there. There’s a bit of a gap there, so don’t even bother wetting a line until we get to the 8th.
The real standout is Trespassers (reef) on Tuesday, September 8th, in the morning. We’ve got a solid 4.9ft SSW groundswell pushing in with a very long period of 17 seconds – that’s proper energy, and the combined energy figure is a hefty 1352. The wind is light and off-shore, from the SE, making for clean, lined-up waves. This is the pick of the entire forecast. The water is sitting at 59.0°F, which is bang on average for this time of year. This is a break for experienced surfers, and with that kind of period, it’s going to be ripping down the reef, not just closing out. It’s a fairly consistent spot, and crowds can be *sometimes* an issue, so get in early.
The following week gets interesting again. Wednesday, September 16th, morning sees another solid pulse. You’ve got a 6.2ft SW groundswell with a 17-second period, and the combined energy is 2054, which is strong. The wind is a light SE cross-off, keeping the surface clean. The swell is a bit bigger, pushing into the expert zone, but the quality should be there for those who can handle it.
Then, hold onto your hats for Friday, September 18th, morning. The wind is dead calm – glassy conditions. The swell is a clean 4.6ft from the SW with a 14-second period. The combined energy is moderate at 848, but with zero wind, the waves will be absolutely perfect. It’s a bit smaller than the earlier standouts, but the conditions will be as good as it gets. The crowd might be a factor though, as it’s a known spot.
Later in the window, the surf is smaller and wind becomes a bit more onshore, so the quality drops off. The 16th of September is the last big highlight before things taper off. The 19th has some small, clean options in the afternoon, but nothing to write home about. The 20th has some size but gets lumpy again.
Stay stoked, and don’t sleep on that Tuesday morning.
Short Range ForecastMostly dry. Very mild (max 14°C on Sun morning, min 9°C on Mon night). Winds decreasing (strong winds from the W on Sat morning, light winds from the SSW by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 13°C on Thu afternoon, min 9°C on Wed night). Winds increasing (light winds from the SE on Tue morning, fresh winds from the SSE by Tue night). | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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 9 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1212 | 2107 | 2110 | 1215 | 924 | 586 | 282 | 264 | 828 | 1352 | 1214 | 1155 | 1328 | 3200 | 3022 | 2263 | 1692 | 1042 | 656 | 576 | 627 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off |
High Tide | 1:17PM0.02m | 1:36PM0.02m | 1:58PM0.02m | 2:19PM0.02m | 3:31AM0.01m | 2:38PM0.02m | 3:27AM0.01m | 2:54PM0.02m | 3:44AM0.01m | 3:06PM0.02m | |||||||||||
Low Tide | 11:35PM0.00m | 11:24PM0.00m | 10:57PM0.00m | 10:30PM0.00m | 6:48AM0.01m | 10:12PM0.00m | 7:49AM0.01m | 10:01PM0.00m | 8:36AM0.01m | 9:57PM0.00m | |||||||||||
 | |  | | |  | |  |  | |  | | | | | | | | | | | |
 | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — |
 | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 14 | 14 | 13 | 14 | 14 | 10 | 12 | 12 | 11 | 12 | 12 | 10 | 12 | 13 | 11 | 14 | 15 | 16 |
Feels °C | 4 | 4 | 7 | 12 | 11 | 9 | 11 | 10 | 6 | 10 | 8 | 6 | 6 | 6 | 5 | 8 | 8 | 7 | 12 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | — | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 16 |
| kJ | 259 | — | 2110 | 1215 | 924 | 586 | 282 | 264 | 828 | 1352 | 1214 | 1155 | 1098 | 3200 | 3022 | 2263 | 1692 | 1042 | 656 | 576 | 627 |
Swell 2 Height (m) Direction Period (s) | — | — | SSW 20 | — | — | S 23 | SSW 21 | SSW 21 | SSW 13 | — | — | — | SSW 19 | — | — | — | S 26 | SW 25 | SW 24 | S 22 | — |
| kJ | — | — | 37 | — | — | 11 | 45 | 170 | 312 | — | — | — | 1328 | — | — | — | 13 | 24 | 22 | 9 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 9 | SW 12 | — | — | — | — | — | — | SE 3 | — | — | SSW 4 | SSE 5 | SE 5 | SE 4 | — | SE 3 | SE 4 | E 3 | ENE 3 | — |
| kJ | 1212 | 2107 | — | — | — | — | — | — | 4 | — | — | 9 | 57 | 32 | 16 | — | 2 | 7 | 2 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1193 | 1184 | 498 | 13 | 13 | 13 | 13 | 13 | 0 | 0 | 13 | 13 | 1221 | 1250 | 59 | 11 | 11 | 0 | 0 | 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.
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