Surf Forecasts:
Trespassers surf forecast from 21 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 9PM (local time) - 3.5ft (1.0m), 12s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 28 Jul, 3PM (local time) - 8ft (2.4m), 15s period, SW swell with 2,328 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 9PM (local time) - 3.5ft (1.0m), 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 Tuesday (Jul 21) at 9PM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 0.4m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 2.4m 15s and forecast to arrive on Tuesday (Jul 28) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Tue 21st Jul) | 3.5ft (1.0m) 12s |
| Best Surf | 9PM (Tue 21st Jul) | 3.5ft (1.0m) 12s |
| Most Powerful | 3PM (Tue 28th Jul) | 8ft (2.4m) 15s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it for Trespassers. It’s a reef break that needs a solid SSW swell to line up, and it’s for the advanced crew. We’ve got a long, frustrating stretch to get through before we see anything worth paddling out for.
The next week and a half is pretty grim. We’re looking at a solid gap from now until the end of the month with no real surf on offer. The wind is a nightmare, mostly cross-on or straight onshore, and the swell is messy. There’s a bump in size around Thursday the 23rd with swell hitting 6 ft to 6 ft from the SSW, and the combined energy is pumping in the moderate to strong range (1244 to 1961), but the period is long (14 to 15 seconds) and the wind is a cross-shore mess that kills any quality. It’s a raw, lumpy situation that’s honestly more interesting for kite surfing than paddle surfing. The 27th and 28th see some bigger, powerful SSW swell (7 ft to 8 ft) with very strong energy readings (853 to 2328), but again, the wind is strong and cross-on, making it unsurfable for all but the most desperate. Water temp is sitting at 59°, which is about average for the time of year.
Hang in there, because the real standouts show up in the first week of August. The absolute best on offer is Tuesday the 4th. That morning we’ve got clean 3 ft SSW groundswell with a very long 18-second period, light offshore winds from the ESE, and the water will be glassy. Combined energy is moderate (527). The afternoon gets even better, with the swell bumping to 4 ft, the period still at 17 seconds, and that same light offshore wind. The energy jumps to 845. That’s clean, lined-up reef surfing. Crowds are possible here, so get there early.
Wednesday the 5th is also a treat. Morning brings 2 ft SW swell with a 20-second period, clean offshore winds from the E, and moderate energy (702). The afternoon holds 3 ft from the SSW at 19 seconds, still with gentle offshore breeze. It’s a beautiful run of clean, groomed waves. For a reef break, that long-period groundswell is a huge positive, giving you proper, well-shaped waves with long lulls between sets.
So, the plan is simple: suffer through the wind and chop for the next week and a half, then be ready for a stellar run of clean, offshore surf at Trespassers on the 4th and 5th of August. That’s your window.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed morning. Very mild (max 15°C on Tue morning, min 11°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Very mild (max 15°C on Sat morning, min 12°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 12 | SW 12 | SW 13 | SW 12 | SW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 12 | SW 11 | SSW 11 | SSW 11 | WSW 10 | SW 11 | SW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 437 | 346 | 209 | 398 | 520 | 1016 | 1244 | 1550 | 1460 | 1083 | 869 | 639 | 552 | 376 | 247 | 189 | 160 | 97 | 853 | 807 | 903 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | on | on | on | cross-on | cross-on | cross-on | on | on | cross | cross-on | cross-on | cross-on |
High Tide | 4:19PM0.02m | 3:25PM0.02m | 2:38PM0.02m | 2:30PM0.02m | 2:42PM0.02m | 2:59PM0.02m | 2:07AM0.00m | 3:17PM0.02m | 2:36AM0.01m | ||||||||||||
Low Tide | 10:05AM0.01m | 00:47AM0.00m | 1:05AM0.00m | 1:20AM0.00m | 1:51AM0.00m | 5:03AM0.00m | 00:09AM0.00m | 6:40AM0.00m | 11:30PM0.01m | ||||||||||||
 | |  |  |  |  | | | | | | | |  |  |  | | | | |  | |
 | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — |
 | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — |
mm | — | — | — | 2 | — | 1 | 1 | — | — | — | — | 1 | — | 1 | — | — | — | — | — | — | 7 |
Temp °C | 15 | 15 | 15 | 13 | 13 | 12 | 11 | 12 | 12 | 13 | 13 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 16 | 12 |
Feels °C | 11 | 12 | 13 | 8 | 7 | 7 | 5 | 7 | 7 | 8 | 8 | 10 | 11 | 10 | 11 | 11 | 12 | 10 | 8 | 8 | 5 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 11 | SSW 12 | SSW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 15 | SW 15 | SW 14 | SW 13 | SW 13 | SSW 12 | SW 11 | SSW 11 | SSW 11 | — | SW 11 | SW 12 |
| kJ | 437 | 346 | 209 | 42 | 52 | 264 | 1244 | 411 | 1460 | 1083 | 869 | 639 | 552 | 376 | 247 | 189 | 160 | 81 | — | 263 | 444 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 15 | SSW 14 | SW 15 | — | — | — | — | — | — | — | S 18 | SW 18 | SW 16 | SSW 16 | SSW 15 | SW 15 | — | SW 19 | — |
| kJ | — | — | 34 | 38 | 54 | — | — | — | — | — | — | — | 6 | 12 | 11 | 25 | 21 | 55 | — | 15 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | S 18 | S 18 | SW 16 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 6 | 10 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NW 2 | W 4 | SW 13 | SW 12 | SW 14 | — | SSW 15 | — | — | WSW 4 | WSW 5 | WSW 5 | W 7 | — | — | NW 4 | W 5 | WSW 10 | SW 11 | SW 13 |
| kJ | — | 1 | 3 | 398 | 520 | 1016 | — | 1550 | — | — | 13 | 26 | 32 | 38 | — | — | 21 | 97 | 853 | 807 | 903 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 731 | 722 | 722 | 722 | 13 | 13 | 346 | 499 | 498 | 498 | 742 | 138 | 117 | 17 | 17 | 159 | 546 | 730 |
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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