Surf Forecasts:
Trespassers surf forecast from 26 Aug 2026:
- Best quality surf: Thursday 27 Aug, 9PM (local time) - 5ft (1.6m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 12AM (local time) - 6ft (1.8m), 18s period, SW swell with 1,925 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 9PM (local time) - 3ft (0.9m), 12s 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 Wednesday (Aug 26) at 9PM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.1m and 24s. 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 1.8m 18s and forecast to arrive on Friday (Aug 28) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Sep 02) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 26th Aug) | 3ft (0.9m) 12s |
| Best Surf | 9PM (Thu 27th Aug) | 5ft (1.6m) 18s |
| Most Powerful | 12AM (Fri 28th Aug) | 6ft (1.8m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, let’s get into it, folks. Rusty here.
Alright, listen up. The next couple of weeks are a bit of a mixed bag, with the real standouts tucked away at the very beginning and then again about a week and a half from now. We’ve got a gap of a few days in between where the conditions just aren’t worth paddling for.
Let’s kick things off on Wednesday, the 26th of August. Trespassers (this is an advanced reef break) is looking sweet. The morning is glassy with a solid 4 ft SW groundswell at a long 13 seconds. The water is sitting at 59°, which is pretty much spot on for this time of year. The combined swell energy is moderate at 475, but with that offshore breeze and clean conditions, it’s going to be a fun session. It’s a fairly consistent spot, so you’ll get waves, but watch out – it can get crowded sometimes. For the morning, this is the call.
After that, things go downhill for a while. Wednesday afternoon gets a cross-on wind, and that messes up what was a clean morning. Thursday the 27th is a write-off with strong cross-shore winds. Friday the 28th morning brings a bigger pulse: 6 ft SW groundswell, still a long 16-second period. The wind is light and cross-offshore, keeping it clean. With combined energy of 1580, this is a powerful session, but at 6 ft on a reef for advanced surfers only. The swell is big enough that beginners should sit this one out. Friday afternoon goes glassy with 5 ft swell – another excellent window. Saturday and Sunday the 30th and 31st clean up nicely with lighter winds, but the swell drops back to around the 3 ft mark.
Now here comes the gap. From Monday the 31st afternoon through the middle of the next week, the wind turns onshore or cross-shore and stays messy. The swell is there, reaching 7 ft by the 5th of September, but it’s blown out and onshore – that’s more of a kiter’s day than a surfer’s, to be honest. You’ll be fighting onshore wind and chop. The combined energy spikes up into the thousands (2361 on the 5th afternoon) but the quality is just poor.
We come back to life on Monday the 7th of September. The morning is dead glassy with a 6 ft SW groundswell at 14 seconds. That’s clean, powerful, and the combined energy is 1250. This is for experienced surfers only, but it’s going to be a memorable session if you’re up for it.
But the true standout of the whole period is Tuesday the 8th of September. Both the morning and afternoon windows are incredible. The morning brings a 6 ft SSW groundswell at a very long 18 seconds, with a light offshore breeze from the east. Combined energy is a strong 1776. That’s a proper groundswell with heaps of energy – the sets will be clean, powerful, and well-spaced. The afternoon goes glassy, 5 ft, same long period, with combined energy still high at 1408. This is the session to circle on your calendar. Just remember, long-period swells like this can sometimes break a bit too straight at some beach breaks, but on this reef, it should line up beautifully.
Then it gets messy again from the 9th onwards with strong cross-shore winds and building, but choppy, swell. By the 10th, we see a massive 10 ft SW swell, but with a moderate cross-shore breeze and marginal conditions, that’s a big, raw ocean for experts only.
So to sum it up: grab Wednesday morning the 26th for a clean start, then hold out for Monday the 7th and absolutely do not miss Tuesday the 8th. The rest of the window is either too small, too windy, or too messy to get excited about.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Fri morning, min 12°C on Wed afternoon). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Mon night, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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 13 | SW 12 | SW 14 | SW 19 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SSW 13 | SW 13 | SSW 20 | SSW 19 | SSW 17 | SSW 19 | SSW 18 | SSW 16 | SW 16 | SW 15 | SW 16 |
Wave Graph | |||||||||||||||||||||
444 | 331 | 139 | 308 | 546 | 1925 | 1580 | 1115 | 623 | 401 | 309 | 199 | 253 | 309 | 837 | 1527 | 1309 | 843 | 565 | 523 | 720 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross | cross | cross-off | cross-off | glassy | off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | cross | cross | cross | cross | glassy |
High Tide | 3:00PM0.02m | 3:20AM0.01m | 3:14PM0.02m | 3:45AM0.01m | 3:26PM0.02m | 4:13AM0.01m | 3:34PM0.02m | 4:39AM0.01m | 3:48PM0.02m | 5:14AM0.01m | 3:54PM0.02m | 5:49AM0.02m | 3:49PM0.02m | ||||||||
Low Tide | 10:26PM0.00m | 8:00AM0.00m | 10:24PM0.00m | 8:29AM0.00m | 10:29PM0.00m | 9:06AM0.01m | 10:35PM0.00m | 9:35AM0.01m | 10:44PM0.00m | 10:11AM0.01m | 10:54PM-0.00m | 10:42AM0.01m | 11:05PM-0.00m | ||||||||
6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:41 | — | — | |
— | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 14 | 16 | 16 | 17 | 17 | 17 | 16 | 17 | 14 | 15 | 16 | 15 | 15 | 17 | 19 | 17 | 20 | 19 |
Feels °C | 11 | 10 | 11 | 10 | 13 | 13 | 15 | 16 | 13 | 15 | 16 | 12 | 12 | 13 | 12 | 11 | 13 | 15 | 11 | 16 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 12 | SW 14 | SW 14 | SW 18 | SW 16 | SW 16 | SW 15 | SW 14 | SSW 13 | SW 13 | SW 12 | SSW 12 | SSW 17 | SSW 19 | SSW 18 | SSW 16 | SW 16 | SW 15 | SW 16 |
444 | 331 | 139 | 308 | 528 | 1925 | 1580 | 1115 | 623 | 401 | 309 | 199 | 149 | 199 | 837 | 1527 | 1309 | 843 | 565 | 523 | 720 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SW 16 | SSW 15 | SW 21 | SW 19 | — | — | — | — | — | SSW 23 | SW 21 | SSW 20 | SSW 19 | SW 21 | SSW 20 | SW 18 | — | — | NE 4 | WSW 5 |
31 | 41 | 86 | 116 | 546 | — | — | — | — | — | 52 | 116 | 253 | 309 | 117 | 127 | 154 | — | — | 1 | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 24 | — | NE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | 22 | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNW 4 | NNW 4 | — | — | — | — | — | SE 2 | ESE 3 | ESE 3 | ESE 3 | SE 3 | ENE 3 | NNE 3 | NNE 2 | NNW 4 | NW 4 | SSE 2 |
— | — | — | 3 | 6 | — | — | — | — | — | 2 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 11 | 11 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 14 | 0 | 17 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 17 | 17 | 165 | 14 | 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.











