Surf Forecasts:
Trespassers surf forecast from 3 Aug 2026:
- Best quality surf: Friday 7 Aug, 6AM (local time) - 5ft (1.6m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Sunday 9 Aug, 6PM (local time) - 10ft (3.0m), 19s period, SW swell with 5,218 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 3PM (local time) - 3.5ft (1.0m), 14s 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 Tuesday (Aug 04) at 3PM. The primary swell is predicted to be 1.0m and 14s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 3.0m 19s and forecast to arrive on Sunday (Aug 09) at 6PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 7s period and expected on Wednesday (Aug 05) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 4th Aug) | 3.5ft (1.0m) 14s |
| Best Surf | 6AM (Fri 7th Aug) | 5ft (1.6m) 15s |
| Most Powerful | 6PM (Sun 9th Aug) | 10ft (3.0m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
G'day, Rusty here.
Alright, looking at the 16-day window for our spot, it’s a real mixed bag. We’ve got a solid run of swell coming through, but the wind is going to be a proper headache for most of it. The water temp is sitting at 59°, which is bang on average for this time of year, so no surprises there.
The first real chance to get wet, and honestly the standout of the whole outlook, is Tuesday the 4th of August. The morning starts a bit cloudy with a light 3 mph onshore wind, which isn't ideal, but the real gold is in the afternoon. The wind goes glassy, and we’re looking at a clean 3 ft swell from the SW with a nice 14-second period. Combined wave energy is moderate (407). It’s not pumping, but it’s your best chance for a clean, fun session this week.
Wednesday the 5th is a write-off. Swell drops right off to 2 ft, and the wind goes cross-shore, making it messy and weak. The weekend of the 7th and 8th picks up in size, with 5 ft on Friday and a 15-second period, and the wind is offshore, but the forecast flags it as marginal. The big problem is Saturday the 8th – the wind howls up to 28 mph, making it a total mess despite the 4 ft SW swell.
Now, we hit a big gap. From the 9th of August right through to the morning of the 18th, the surf is either too big, too windy, or both. Swells are pumping – we’re talking 8 ft to 10 ft, with some serious energy readings (3808 and 9723 at times) – but every single session is marred by strong, onshore or cross-onshore winds. It’s a classic case of plenty of ocean but no quality. For a few days there, with the strong onshore winds and 10 ft swell, it’s looking more like a kite surfer’s playground than a paddle surfer’s dream.
The light at the end of the tunnel is Tuesday the 18th of August. It’s a long way out, so treat it with a bit of caution, but the forecast is sweet. The morning is glassy, with a 5 ft SW swell at 16 seconds. The combined energy is moderate (1430). For an advanced spot like Trespassers, this is the window to circle on your calendar. It’s the only session that gets a top mark for excellent conditions. The wind is dead calm, so the reef should be pure perfection.
So, to sum it up: grab Tuesday the 4th afternoon for a clean, small wave, then hold out for Tuesday the 18th morning. Everything else in between is a battle with the wind.
Rusty.
Short Range ForecastMostly dry. Very mild (max 14°C on Wed night, min 10°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Fri night. Very mild (max 17°C on Fri afternoon, min 11°C on Sat night). Winds increasing (light winds from the SW on Thu afternoon, near gales from the NNW by Sat afternoon). | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | WSW 14 | SW 13 | SW 12 | SW 14 | SSW 20 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SW 16 | SW 15 | SW 16 | SW 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 13 | SW 15 | SW 18 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1295 | 690 | 398 | 407 | 280 | 246 | 283 | 475 | 441 | 610 | 1133 | 1267 | 1290 | 1012 | 917 | 993 | 3609 | 2530 | 3181 | 4804 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | glassy | cross-off | cross | cross-on | cross-on | cross | cross-on | cross-off | cross-off | cross-off | cross | cross-off | cross | on | on | on | on |
High Tide | 4:45PM0.02m | 6:58AM0.01m | 4:39PM0.02m | 8:18AM0.01m | 4:12PM0.02m | 3:06PM0.02m | 2:07PM0.02m | 2:08PM0.02m | 2:27PM0.02m | |||||||||||
Low Tide | 00:02AM0.00m | 10:41AM0.01m | 00:19AM0.00m | 10:34AM0.01m | 00:30AM0.00m | 00:39AM0.00m | 00:42AM0.00m | 00:36AM0.00m | 00:10AM0.00m | |||||||||||
 |  | |  |  | | | |  | | | | |  |  |  |  | | | | |
 | — | — | 7:15 | — | — | 7:13 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — |
 | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 5 | 2 | — | 4 |
Temp °C | 12 | 12 | 12 | 11 | 11 | 13 | 13 | 14 | 14 | 14 | 13 | 15 | 17 | 17 | 13 | 14 | 13 | 12 | 13 | 13 |
Feels °C | 7 | 7 | 10 | 9 | 8 | 9 | 9 | 11 | 12 | 12 | 10 | 11 | 13 | 11 | 3 | 4 | 5 | 2 | 5 | 6 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | SW 13 | SW 12 | SW 14 | SW 14 | SSW 14 | SSW 18 | SSW 16 | SSW 16 | SW 16 | SW 15 | SW 16 | SW 17 | SW 17 | SW 16 | SW 16 | — | — | SW 14 | — |
| kJ | 1295 | 690 | 398 | 407 | 191 | 138 | 283 | 475 | 441 | 610 | 1133 | 1267 | 1290 | 1012 | 917 | 993 | — | — | 976 | — |
Swell 2 Height (m) Direction Period (s) | — | SSW 18 | SW 15 | — | SSW 20 | SSW 19 | SW 13 | — | SSW 20 | W 7 | WNW 7 | — | — | WSW 6 | ENE 5 | WSW 9 | — | — | SSW 19 | — |
| kJ | — | 31 | 145 | — | 280 | 246 | 144 | — | 38 | 4 | 18 | — | — | 7 | 2 | 67 | — | — | 424 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 3 | — | W 5 | W 7 | — | — | — | — | — | E 5 | — | — | — | — |
| kJ | — | — | — | — | — | — | 1 | — | 2 | 9 | — | — | — | — | — | 2 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 14 | — | — | — | — | N 4 | NW 4 | WNW 6 | — | — | — | NE 3 | N 3 | NE 2 | NNW 4 | NW 5 | SW 15 | SW 13 | SW 15 | SW 18 |
| kJ | 1115 | — | — | — | — | 1 | 4 | 3 | — | — | — | 2 | 3 | 1 | 43 | 62 | 3609 | 2530 | 3181 | 4804 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 498 | 733 | 11 | 13 | 0 | 0 | 14 | 14 | 14 | 13 | 13 | 0 | 14 | 100 | 100 | 668 | 668 | 914 | 546 | 748 |
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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