Surf Forecasts:
Trespassers surf forecast from 17 Jul 2026:
- Best quality surf: Thursday 23 Jul, 3AM (local time) - 5ft (1.6m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Thursday 23 Jul, 9PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with 1,356 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 6PM (local time) - 3.5ft (1.1m), 15s 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 Friday (Jul 17) at 6PM. The primary swell is predicted to be 1.1m and 15s 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 1.7m 16s and forecast to arrive on Thursday (Jul 23) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 7s period and expected on Sunday (Jul 19) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Fri 17th Jul) | 3.5ft (1.1m) 15s |
| Best Surf | 3AM (Thu 23rd Jul) | 5ft (1.6m) 15s |
| Most Powerful | 9PM (Thu 23rd Jul) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, let’s run through it for Trespassers.
The first real shot is Friday, 17 July. The morning is the one to go for – clean 4ft SSW groundswell with a proper long 16-second period. That’s decent energy, clocking in at 853, and with a light NNE cross-off breeze, it’s gonna be glassy. Water temp is about 59°, which is normal for the season. This is an advanced reef break, so it’s not for the beginners, and crowds can pop up sometimes, so get in early. The swell direction is straight from the SSW, which is exactly what this spot wants.
The afternoon on Friday goes cross-shore and loses quality. Saturday morning is clean but small at 3ft, and then it’s a long dry spell. From Saturday afternoon through to Wednesday, 22 July, it’s mostly poor or marginal – small swell, messy wind, not worth a paddle.
Then we get a pulse on Thursday, 23 July. The morning is clean again with a 5ft SSW swell, 14-second period, and a light S cross-off breeze. That’s a solid moderate energy of 975. The afternoon gets cross-on, so the morning is the pick. It’s head-high to a bit overhead, and still an advanced reef.
After that, the wind swings onshore and it’s a washout. The rest of the run into late July and early August is blown out. Friday, 31 July, has a solid 5ft SSW swell with a long 18-second period and a strong 1245 energy, but it’s blowing a fresh 35 km/h cross-onshore, so it’s a lumpy mess. That’s kite territory, not paddle.
The standout is Friday morning, 17 July. Thursday morning, 23 July is a solid backup. Don’t expect much else.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Sun night, min 12°C on Fri afternoon). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Tue night. Very mild (max 15°C on Mon afternoon, min 12°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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) | SSW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 20 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | SW 13 | SW 15 | SSW 14 | SW 14 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 657 | 412 | 313 | 208 | 136 | 120 | 252 | 498 | 432 | 404 | 581 | 437 | 418 | 240 | 126 | 495 | 905 | 1142 | 1203 | 1193 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross | glassy | on | on |
High Tide | 5:06AM0.01m | 5:04PM0.02m | 6:01AM0.01m | 5:01PM0.02m | 7:05AM0.01m | 4:48PM0.02m | 8:59AM0.01m | 4:19PM0.02m | 3:25PM0.02m | 2:38PM0.02m | ||||||||||
Low Tide | 00:15AM0.00m | 9:56AM0.00m | 00:16AM0.00m | 10:23AM0.01m | 00:17AM0.00m | 10:39AM0.01m | 00:33AM0.00m | 10:05AM0.01m | 00:47AM0.00m | 1:05AM0.00m | 1:20AM0.00m | |||||||||
 |  | | | |  |  | | | |  | | |  | | |  | | | | |
 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — |
 | 5:29 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 13 | 14 | 13 | 15 | 15 | 14 | 15 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 14 |
Feels °C | 10 | 10 | 9 | 12 | 11 | 10 | 11 | 12 | 11 | 12 | 12 | 13 | 12 | 13 | 12 | 10 | 10 | 10 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | WSW 12 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 11 | SW 11 | SW 15 | SSW 14 | SW 14 | SW 16 |
| kJ | 657 | 412 | 313 | 208 | 136 | 120 | 115 | 498 | 432 | 404 | 581 | 437 | 418 | 240 | 126 | 29 | 905 | 1142 | 1203 | 1193 |
Swell 2 Height (m) Direction Period (s) | — | — | W 6 | WNW 6 | W 6 | SW 20 | SW 18 | WSW 7 | W 7 | SW 15 | W 10 | — | — | SW 15 | S 15 | SSW 14 | SW 6 | — | — | — |
| kJ | — | — | 3 | 17 | 3 | 97 | 252 | 9 | 27 | 75 | 66 | — | — | 34 | 4 | 36 | 20 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 22 | — | ENE 3 | — | — | NNE 3 | — | — | — | — | — | SW 18 | — | — | — | — |
| kJ | — | — | — | — | 18 | — | 1 | — | — | 1 | — | — | — | — | — | 13 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 3 | NW 6 | NNW 3 | — | N 2 | N 3 | WNW 4 | — | — | — | — | W 4 | SW 13 | — | — | WSW 4 | WSW 5 |
| kJ | — | — | — | 1 | 5 | 1 | — | 1 | 1 | 3 | — | — | — | — | 13 | 495 | — | — | 17 | 18 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 0 | 0 | 0 | 0 | 17 | 17 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 722 | 11 | 0 | 17 | 165 |
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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