Surf Forecasts:
Trespassers surf forecast from 3 Aug 2026:
- Best quality surf: Friday 7 Aug, 3AM (local time) - 5.5ft (1.7m), 15s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 10 Aug, 12AM (local time) - 10ft (3.0m), 18s period, SW swell with 6,083 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 6PM (local time) - 3ft (0.9m), 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 6PM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 0.4m and 21s. 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 18s and forecast to arrive on Monday (Aug 10) at 12AM. 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+) | 6PM (Tue 4th Aug) | 3ft (0.9m) 14s |
| Best Surf | 3AM (Fri 7th Aug) | 5.5ft (1.7m) 15s |
| Most Powerful | 12AM (Mon 10th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s cooking at Trespassers.
Right off the bat, we’re looking at a rough start. The first few days are a write-off – you’ll be lucky to get a wave that’s not a complete mess. The wind is all over the place, mostly cross or onshore, and the wave quality is just not there. It’s a bit of a bummer, but that’s the way it goes sometimes.
The first real glimmer of something decent shows up on Friday, August 7th. We’ve got a clean 5 ft swell from the SW, with a nice long 15-17 second period. The wind swings to a light cross-offshore from the NNE, and the water is cleaning right up. The energy is solid (1498 on the morning session), and it’s feeling like a proper groundswell. This is a good window for the advanced crew at this reef break. The water temp is about average for this time of year, so no surprises there.
Saturday the 8th and Sunday the 9th are a complete washout – strong winds, rippled-out surfaces, and messy conditions. The swell gets big on Sunday (10 ft) but it’s blowing a gale. Forget it.
The whole next week is a battle with the wind. We get a solid run of SW groundswell, with plenty of energy (the 12th of August has a combined energy of 6977, which is very strong), but it’s constantly cross-on or onshore. The wave quality is “poor” or “marginal” the whole time. It’s a classic case of plenty of ocean but no good shape. For a beach-and-reef setup like this, with that much wind and swell, the setup looks more interesting for kite surfing than paddle surfing.
Then, just when you think it’s over, we get a real standout. For the afternoon of Tuesday, August 18th, the conditions line up. The swell is a solid 6 ft from the SW, with a long 16-17 second period. The wind drops to glassy – a perfect 5 km/h offshore from the ESE. The combined energy is strong (1852), and it’s described as “excellent surf conditions for experienced surfers.” This is the session to wait for. A long-period groundswell like this can be a bit bowly on a reef, but it’s going to have a ton of push and power. This is the best on offer.
The morning of the 19th of August still has some okay 5 ft swell, but the wind goes cross-shore, so it’s a step down from the day before.
So, to sum it up: suffer through the first week of wind and chop, then circle Tuesday, August 18th on your calendar. That afternoon is the real deal.
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 SummaryHeavy rain (total 24mm), heaviest during Sat morning. Very mild (max 17°C on Fri afternoon, min 11°C on Sat morning). Winds increasing (light winds from the ESE on Thu night, near gales from the W by Sat night). | ||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 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 13 | SW 12 | SW 14 | SSW 20 | SSW 19 | SSW 18 | SSW 16 | SSW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | WSW 15 | SW 11 | SW 14 | SW 18 |
Wave Graph  | |||||||||||||||||||
 kJ | 690 | 398 | 401 | 280 | 246 | 283 | 475 | 441 | 786 | 1133 | 1033 | 1305 | 988 | 1031 | 980 | 1966 | 1773 | 2618 | 6083 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | on | cross-off | cross | cross | cross-on | cross-on | on | cross-off | cross-off | cross-off | cross | cross | cross | on | cross-on | on | on |
High Tide | 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 | — | — |
 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 9 | 4 | 9 | 1 | — | 3 |
Temp °C | 12 | 12 | 12 | 11 | 13 | 13 | 14 | 14 | 14 | 13 | 14 | 17 | 17 | 12 | 14 | 14 | 13 | 13 | 14 |
Feels °C | 7 | 9 | 10 | 8 | 10 | 9 | 10 | 12 | 12 | 12 | 10 | 12 | 12 | 3 | 8 | 6 | 3 | 4 | 7 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 14 | SW 14 | SSW 14 | SSW 18 | SSW 16 | SSW 16 | SW 16 | SW 15 | SW 15 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 15 | — | SW 13 | — |
| kJ | 690 | 398 | 401 | 191 | 138 | 283 | 475 | 441 | 786 | 1133 | 1033 | 1305 | 988 | 1031 | 980 | 344 | — | 669 | — |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SW 15 | — | SSW 20 | SSW 19 | SW 13 | SW 12 | SSW 20 | W 7 | — | SSW 19 | — | — | WSW 7 | — | NE 5 | — | SSW 20 | — |
| kJ | 31 | 145 | — | 280 | 246 | 144 | 23 | 38 | 16 | — | 465 | — | — | 26 | — | 1 | — | 253 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NNE 3 | — | W 4 | W 7 | — | — | — | — | E 5 | — | — | — | SSW 16 | — |
| kJ | — | — | — | — | — | 1 | — | 1 | 9 | — | — | — | — | 2 | — | — | — | 201 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 4 | NNW 4 | WNW 5 | — | — | — | NE 3 | NNW 4 | NNW 4 | NW 5 | WNW 5 | WSW 15 | SW 11 | SW 14 | SW 18 |
| kJ | — | — | — | — | 1 | 3 | 2 | — | — | — | 1 | 6 | 33 | 74 | 60 | 1966 | 1773 | 2618 | 6083 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 13 | 13 | 7 | 0 | 14 | 14 | 14 | 13 | 14 | 0 | 14 | 67 | 17 | 480 | 705 | 914 | 1184 | 970 | 1062 |
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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