
Surf Forecasts:
Trespassers surf forecast from 18 Jul 2026:
- Best quality surf: Thursday 23 Jul, 6PM (local time) - 5.5ft (1.7m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 22 Jul, 9PM (local time) - 5.5ft (1.7m), 14s period, SSW swell with 1,227 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 12AM (local time) - 2ft (0.6m), 13s 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 Sunday (Jul 19) at 12AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.2m and 6s. 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 1.7m 14s and forecast to arrive on Wednesday (Jul 22) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 7s period and expected on Sunday (Jul 19) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sun 19th Jul) | 2ft (0.6m) 13s |
| Best Surf | 6PM (Thu 23rd Jul) | 5.5ft (1.7m) 15s |
| Most Powerful | 9PM (Wed 22nd Jul) | 5.5ft (1.7m) 14s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the menu at Trespassers over the next 16 days.
Right off the bat, I gotta be straight with you – the next week and a half is a bit of a struggle. The water is sitting at 60°F, which is bang on average for this time of year, so no need for a thicker suit just yet. But the surf? It’s mostly mediocre to poor until we get past the 23rd. There’s a long gap here with no real recommendations, so don’t be in a rush.
Saturday afternoon the 18th kicks things off with a tiny 3ft SW swell (208 combined energy), and the wind is a clean cross-off from the NNE at 10 km/h. It’s surfable, but it’s very ordinary – not worth paddling out for. Sunday and Monday are a write-off: small, messy, and cross/onshore winds. The swell picks up a bit on Tuesday the 22nd, around 5ft to 5ft, but with a 30 km/h cross-on wind, it’s just a lumpy mess. The combined energy gets up to 1048 by Tuesday afternoon, but the quality is shot.
Things start looking a little more interesting around Thursday the 23rd. We’ve got a 6ft SSW swell rolling in with a 14-second period (combined energy of 1193), and the wind is a gentle cross-shore from the S at 15 km/h. This is a longer-period groundswell, which gives the waves more shape and energy, but it also means longer lulls between sets. The conditions are still marginal, but this is the first time the score starts to climb. Worth a look for the more experienced crew, as 6ft is getting a bit solid for beginners.
Friday the 24th drops back to 4ft, and the wind becomes cross-on or onshore, so it’s not great. Then Saturday the 25th morning is the standout in this first week. The swell is 3ft from the SSW, period at 13 seconds, combined energy of 362, and the wind is a clean cross-off from the NNE at 15 km/h. The wave comment says “expect good surf conditions,” and the conditions are clean. This is a small but fun window for a savvy surfer who knows where to sit at this reef break. It’s a fairly consistent spot, so you’ll get waves. Crowds are sometimes an issue, so keep an eye out.
After that, Sunday the 26th through Tuesday the 29th is a total mess – strong winds, lumpy cross-chop, and onshore slop. Wednesday the 30th morning has a tiny 3ft wave with a clean cross-off, but it’s not worth the effort.
Now, if you’ve got patience, the end of the forecast window is where the real action might be. On Friday the 31st of July, we get a 1ft SW swell with a 20-second period (combined energy 198) and a clean offshore wind from the E at 15 km/h. That’s a very long-period groundswell – the kind that wraps around reefs and points, but can be too straight for beach breaks. Trespassers is a reef, so this could be a gem, but it’s tiny. Not a standout.
The real tease is the first couple of days of August. Saturday the 1st has a 4ft SW swell, 17-18 second period, combined energy around 749-809, and cross-off winds in the morning. The conditions are clean, but the score is still marginal. Then Sunday the 2nd – hold onto your board – we’ve got a massive 12ft SW swell, 16-second period, combined energy of over 5600. That’s a very strong, powerful swell. But the wind is a fresh cross-shore at 35 km/h, and the conditions are lumpy and poor. At 12ft, this is strictly for experts only, and with that wind, it’s a dangerous, blown-out mess. This is more of a kite-surfing setup than a paddle session.
Best on offer: Thursday the 23rd July for the more experienced crew looking for size and power, with a 6ft SSW groundswell and gentle cross-shore wind. And Saturday the 25th July morning for a clean, small, user-friendly session.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Sun night, min 13°C on Sun morning). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Tue night. Very mild (max 15°C on Tue afternoon, min 11°C on Wed night). Winds decreasing (fresh winds from the SW on Wed morning, calm by Thu night). | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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 20 | SW 18 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SW 13 | WSW 11 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | ||||||||||||||||||||
208 | 136 | 97 | 252 | 498 | 432 | 466 | 706 | 488 | 306 | 209 | 683 | 517 | 1193 | 1193 | 1080 | 1001 | 691 | 538 | 396 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | cross-on | cross | cross | cross | cross | cross-on | on | cross-off |
High Tide | 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 | 2:30PM0.02m | ||||||||||
Low Tide | 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 | 1:51AM0.00m | ||||||||||
— | — | 7:26 | — | — | 7:26 | — | — | 7:24 | — | — | 7:24 | — | — | 7:24 | — | — | 7:22 | — | — | |
5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 13 | 15 | 16 | 14 | 16 | 16 | 15 | 15 | 15 | 13 | 13 | 11 | 13 | 12 | 11 | 12 | 12 | 11 |
Feels °C | 12 | 11 | 9 | 11 | 12 | 10 | 13 | 13 | 12 | 12 | 13 | 7 | 7 | 5 | 8 | 8 | 7 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 12 | WSW 12 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 12 | SW 12 | SSW 14 | WSW 11 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
208 | 136 | 93 | 152 | 498 | 432 | 466 | 706 | 488 | 306 | 209 | 37 | 517 | 1193 | 1193 | 1080 | 1001 | 691 | 538 | 396 | |
Swell 2 Height (m) Direction Period (s) | NW 6 | WNW 6 | SW 20 | SW 18 | W 7 | — | — | W 5 | — | — | SW 15 | WSW 11 | SW 15 | — | — | — | — | — | — | — |
11 | 4 | 97 | 252 | 36 | — | — | 5 | — | — | 35 | 44 | 34 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | SW 22 | W 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | 18 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | N 3 | NNW 3 | N 3 | NNW 3 | WNW 4 | — | — | W 4 | WSW 6 | SW 13 | SW 11 | — | SSE 3 | — | — | — | — | — |
— | — | 1 | 3 | 1 | 3 | 7 | — | — | 18 | 35 | 683 | 497 | — | 2 | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 17 | 17 | 19 | 17 | 14 | 14 | 14 | 14 | 14 | 731 | 748 | 13 | 11 | 11 | 11 | 13 | 13 | 0 |
Best forecast wave conditions in Yorke Peninsula | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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.










