
Surf Forecasts:
Trespassers surf forecast from 3 Sep 2026:
- Best quality surf: Friday 4 Sep, 3AM (local time) - 7ft (2.1m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 3PM (local time) - 7.5ft (2.3m), 19s period, SSW swell with 3,688 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 3AM (local time) - 7ft (2.1m), 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 Friday (Sep 04) at 3AM. The primary swell is predicted to be 2.1m and 16s period. 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 19s and forecast to arrive on Wednesday (Sep 09) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 09) at 12PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 4th Sep) | 7ft (2.1m) 16s |
| Best Surf | 3AM (Fri 4th Sep) | 7ft (2.1m) 16s |
| Most Powerful | 3PM (Wed 9th Sep) | 7.5ft (2.3m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
We’ve got a solid run of swell coming through for Trespassers, but it’s a real mixed bag of conditions. The first few days, we’re sitting it out, waiting for the wind to play nice. The real standout is going to be that Sunday morning session, but hold on, because there’s a wildcard later in the forecast that has me pretty fired up.
The first real opportunity is Sunday, the 6th of September. This is the one. We’re seeing a 6ft groundswell from the SSW, with a period of 14 seconds. That’s proper energy, and with the wind going glassy – you heard that right, glassy – it’s going to be clean as a whistle. The combined energy is a solid 1150 (moderate), so there’s some push there. It’s a reef break for advanced surfers, so it’s not for the faint of heart, but if you’ve got the skills, this is the best on offer. The water temp is about average for the time of year, nothing weird going on.
Monday, the 7th, drops right off. The swell drops to 3ft, but the wind goes offshore in the afternoon. It’s small, but if you’re desperate for a clean, gentle wave, the ESE wind at 15 km/h will make it look pretty. The combined energy is down to 429 (weak), so it’s a longboard or a foiler kind of day.
Tuesday, the 8th, is another cracker. We’re back to 5ft from the SSW, but check out that period – 17 seconds. That’s very long period groundswell. The wind is light offshore from the E at 10 km/h, making for clean conditions. The energy is up to 1352 (moderate). This is a standout for the experienced crew. Just remember, with a period that long, it can be a bit straight at a beach break, but on a reef like Trespassers, it should line up nicely.
Midweek starts to get a bit messy. Wednesday the 9th and Thursday the 10th have solid swell – 7ft to 8ft – but the wind is howling from the SSE and SE at 35-40 km/h. It’s cross-off, which keeps it clean, but that’s a lot of wind. The energy is strong (3298-2377), so it’s powerful, but it’s a big-boy session. Friday the 11th and Saturday the 12th are small again, with 3ft to 4ft, but offshore winds keep them clean. Not a standout, just a fun little window.
Then we hit a real rough patch from Sunday the 13th all the way through Wednesday the 16th. The wind is onshore, cross-on, or just plain messy, with speeds up to 35 km/h. The swell is there, between 5ft and 7ft, but the conditions are poor. It’s a write-off for paddle surfing. Honestly, with that much wind and a beach-and-reef setup, it might be more interesting for the kite surfers. Combined energy is moderate to strong (385-2661), but the wind is ruining it.
Now, here’s the wildcard. Thursday the 17th of September. This is a serious episode. We’ve got a massive 10ft swell from the SSW, with a period of 18 seconds. The combined energy is 7664 (strong). That is a lot of water moving. The wind is cross-off from the SSE at 25 km/h, so it’s clean. This is only for experts – 10ft on a reef is serious business. It’s a long-range forecast, so it’s promising but not locked in, but if it shows up, it’s going to be the day of the month.
Friday the 18th is still solid, with 7ft from the SSW and a 16-second period, and the wind drops to a light 10 km/h cross-off. Clean and powerful. That’s a great follow-up day if you survived Thursday.
Saturday the 19th fades out. 4ft from the SW with a light cross breeze. Small end to a big run.
Overall, the best bet is Sunday the 6th for the glassy conditions, and keep an eye on Thursday the 17th for the big, clean groundswell. That’s the one to circle on the calendar.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri morning. Very mild (max 18°C on Fri afternoon, min 12°C on Sun afternoon). Winds increasing (calm on Thu night, near gales from the WNW by Fri night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 14°C on Mon afternoon, min 11°C on Sun night). Winds increasing (calm on Tue morning, strong winds from the SSE by Tue night). | ||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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 15 | SSW 16 | SW 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 19 | SSW 18 |
Wave Graph | |||||||||||||||||||
2120 | 2151 | 1799 | 1056 | 1382 | 1659 | 1587 | 1150 | 911 | 471 | 245 | 261 | 828 | 1352 | 1214 | 832 | 3205 | 3688 | 3491 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | on | on | cross-on | glassy | on | cross-off | cross-off | off | off | off | cross-on | cross | cross-off | cross-off | cross-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 | |||||||||||
Low Tide | 11:26PM-0.00m | 11:34PM-0.00m | 11:35PM0.00m | 11:24PM0.00m | 10:57PM0.00m | 10:30PM0.00m | 6:48AM0.01m | 10:12PM0.00m | |||||||||||
— | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | |
6:04 | — | 6:04 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — |
Temp °C | 13 | 16 | 18 | 17 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 12 | 13 | 13 | 12 | 13 | 13 | 12 |
Feels °C | 12 | 11 | 14 | 13 | 3 | 5 | 8 | 11 | 11 | 10 | 10 | 10 | 7 | 12 | 12 | 9 | 3 | 4 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 16 | SW 16 | SSW 15 | 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 19 | SSW 18 |
2120 | 2151 | 1799 | 1056 | 259 | — | 1587 | 1150 | 911 | 471 | 245 | 261 | 828 | 1352 | 1214 | 832 | 3205 | 3688 | 3491 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | NE 4 | — | — | SSW 20 | — | — | S 23 | SSW 21 | SSW 21 | SW 13 | — | — | SW 24 | SSW 22 | — | — |
— | — | — | 3 | — | — | 37 | — | — | 10 | 45 | 168 | 245 | — | — | 153 | 93 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | NE 3 | NNE 3 | W 5 | SW 10 | SW 12 | — | — | — | SSE 2 | SE 3 | ESE 4 | ESE 5 | ESE 4 | ESE 4 | SE 4 | SE 5 | SE 5 | ESE 5 |
— | 2 | 3 | 49 | 1382 | 1659 | — | — | — | 1 | 6 | 11 | 37 | 14 | 8 | 29 | 74 | 82 | 72 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 160 | 100 | 668 | 1041 | 1193 | 160 | 0 | 14 | 13 | 11 | 0 | 0 | 0 | 11 | 13 | 1092 | 1062 | 1034 |
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.










