
Surf Forecasts:
Trespassers surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9AM (local time) - 5ft (1.5m), 17s period, SSW swell with offshore winds.
- Most powerful swell: Wednesday 9 Sep, 9AM (local time) - 7.5ft (2.3m), 20s period, SSW swell with 4,127 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 6AM (local time) - 3.5ft (1.1m), 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 6AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.2m and 22s. 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 2.3m 20s and forecast to arrive on Wednesday (Sep 09) at 9AM. 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 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 7th Sep) | 3.5ft (1.1m) 13s |
| Best Surf | 9AM (Tue 8th Sep) | 5ft (1.5m) 17s |
| Most Powerful | 9AM (Wed 9th Sep) | 7.5ft (2.3m) 20s |
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 Trespassers.
Right, we’ve got a solid run of swells coming in, but it’s a mixed bag of conditions. The water here is sitting at 59°, which is pretty much where you’d expect it to be for this time of year, nothing weird going on.
The action kicks off this Friday morning, the 4th of September. There’s a solid 7ft swell from the SSW, but it’s carrying a lot of energy (2151). The problem is a moderate cross-offshore breeze that’s going to keep things a bit messy. It’s surfable, but not the best we’ll see. The wind picks up in the afternoon, making it even less appealing.
Saturday the 5th is a write-off. Strong onshore winds and a messy lumpy swell. Not worth getting wet.
We get a bit of a breather on Sunday the 6th. The swell drops to 6ft, but the wind is light cross-onshore, so it’s small and bumpy. You’d be fighting for scraps.
Now, Monday the 7th is a small day. The swell is only 3ft from the SSW. But the wind is light and clean, so if you’ve got a big board, you might find a few fun little ones.
Tuesday the 8th is where it starts to get interesting. The morning looks promising. The swell is 5ft but it’s a long-period groundswell from the SSW (17 seconds). The wind is offshore and light, so the waves will be clean and well-shaped. This is a reef break, so that long period will translate into some proper, grinding lines. This is a standout for the experienced crew. The energy is strong (1352), so there’s plenty of push. It’s an advanced wave, and crowds are possible, so get there early.
Wednesday the 9th sees a big jump in size. The swell is 8ft to 8ft from the SSW, with a massive 20-second period, carrying very strong energy (4127). But the wind is a fresh cross-offshore, making it a bit tricky. The wave quality is there, but it’s going to be a handful. Thursday the 10th is a better bet. The swell drops to 6ft, the wind is offshore and clean, and the waves will be powerful. Another good day for the experienced surfer.
The swell fades over the weekend of the 12th and 13th, with small 3ft to 4ft surf. The wind on Saturday is light, so you might get a couple of rides, but Sunday is blown out.
We hit a flat spot from Monday the 14th through to Tuesday morning the 15th. The swell is tiny and the wind is messy.
Then things kick off again. Tuesday afternoon the 15th and Wednesday the 16th are the real standouts. The swell jumps to 10ft from the SW, with a long period (14-15 seconds) and very strong energy (2305-3424). The wind on Tuesday afternoon is a moderate cross-offshore, but on Wednesday afternoon, we get a glassy calm. For a reef break, that’s perfection. The waves will be big, powerful, and clean. This is expert territory only – 8ft to 10ft is serious. It’s a bit far out, so keep an eye on the forecast, but it’s looking like the best window of the whole run.
The end of the run from the 17th to the 19th sees the swell staying around 7ft to 8ft, but the wind is fresh and not ideal, so it’s a step down from that mid-week peak.
So, to sum it up: the best bets are Tuesday the 8th for a cleaner, more manageable solid swell, and then the big one on Wednesday the 16th for the glassy, powerful, expert-level session. Don’t waste your time on the weekend of the 12th.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Very mild (max 18°C on Fri afternoon, min 11°C on Sun night). Winds decreasing (strong winds from the WNW on Fri night, light winds from the WSW by Sun morning). | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Mon afternoon, min 9°C on Wed night). Winds increasing (calm on Tue morning, fresh winds from the SSE by Wed morning). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 16 | SSW 15 | SW 10 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 20 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph | |||||||||||||||||||||
2151 | 1699 | 1056 | 1430 | 1902 | 1975 | 1319 | 911 | 586 | 282 | 261 | 828 | 1352 | 1229 | 1289 | 4127 | 3731 | 2968 | 1975 | 1555 | 897 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | on | on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | off | off | cross-on | cross-off | cross-off | cross-off | cross-off | off | off | off |
High Tide | 1:32PM0.02m | 1:17PM0.02m | 1:36PM0.02m | 1:58PM0.02m | 2:19PM0.02m | 3:31AM0.01m | 2:38PM0.02m | 3:27AM0.01m | 2:54PM0.02m | ||||||||||||
Low Tide | 11:34PM-0.00m | 11:35PM0.00m | 11:24PM0.00m | 10:57PM0.00m | 10:30PM0.00m | 6:48AM0.01m | 10:12PM0.00m | 7:49AM0.01m | 10:01PM0.00m | ||||||||||||
6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | |
— | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | |
mm | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 18 | 17 | 13 | 13 | 13 | 14 | 13 | 12 | 13 | 14 | 12 | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 11 | 11 |
Feels °C | 9 | 13 | 12 | 3 | 5 | 7 | 11 | 10 | 8 | 9 | 11 | 9 | 12 | 10 | 8 | 4 | 4 | 4 | 5 | 6 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 15 | — | — | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 20 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
2151 | 1699 | 1056 | — | — | 1975 | 1319 | 911 | 586 | 282 | 261 | 828 | 1352 | 1229 | 1289 | 4127 | 3731 | 2968 | 1975 | 1555 | 897 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | SW 20 | — | — | S 23 | SSW 21 | SW 21 | SW 13 | — | — | SSW 26 | — | — | — | — | — | S 25 |
— | — | — | — | — | 60 | — | — | 11 | 45 | 212 | 238 | — | — | 65 | — | — | — | — | — | 13 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNE 3 | N 4 | W 5 | SW 10 | SW 12 | — | — | — | S 3 | SE 3 | SE 3 | ESE 4 | ESE 3 | — | SSE 3 | SE 4 | SE 5 | SE 5 | ESE 5 | ESE 4 | ESE 4 |
3 | 6 | 45 | 1430 | 1902 | — | — | — | 1 | 2 | 2 | 5 | 2 | — | 4 | 23 | 44 | 58 | 39 | 28 | 20 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 160 | 100 | 651 | 1041 | 1184 | 499 | 13 | 13 | 13 | 0 | 0 | 0 | 0 | 13 | 13 | 1184 | 1430 | 11 | 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.










