Surf Forecasts:
Trespassers surf forecast from 30 Jul 2026:
- Best quality surf: Thursday 6 Aug, 9AM (local time) - 5ft (1.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 3 Aug, 12AM (local time) - 6ft (1.8m), 16s period, SW swell with 1,591 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 12AM (local time) - 3ft (0.9m), 13s period with SSW 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 31) at 12AM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.1m and 23s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 1.8m 16s and forecast to arrive on Monday (Aug 03) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 01) at 9PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Fri 31st Jul) | 3ft (0.9m) 13s |
| Best Surf | 9AM (Thu 6th Aug) | 5ft (1.5m) 16s |
| Most Powerful | 12AM (Mon 3rd Aug) | 6ft (1.8m) 16s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, Rusty here, and we're looking at just the one spot on the menu for the next couple of weeks: Trespassers. It's a fairly consistent, advanced reef that gets going on a solid SSW swell.
Water temp is sitting about 59°F, which is pretty normal for this time of year.
We're kicking off with a real gem. Thursday afternoon the 30th of July: the wave energy is humming (394), swell is a clean 4ft out of the SW with a 13-second period, and the wind is dead glassy. That's prime time. A long-period groundswell on a glassed-off reef. It doesn't get much better.
It gets a bit scrappy after that. Friday the 31st sees the swell drop to 3ft and 2ft, cross-off wind keeps it tidy but it's small. Saturday the 1st of August gets bumpy with a strong crosswind on a 4ft swell. From Sunday the 2nd through the morning of Tuesday the 4th of August, it's mostly onshore and lumpy.
Tuesday morning the 4th of August is another golden snapshot: flat calm, 3ft SW swell, moderate energy (403). A real morning cruiser.
Then the wind picks up hard. From the 5th to the 12th of August, the conditions get rough and messy. Big energy numbers (775, 1161, 1577) but the wind ruins it for this reef.
The big highlight is Thursday the 13th of August. Watch out. This is a massive 10ft SW groundswell with a crazy long 22-second period, and the energy is off the charts at 8466. The wind is just a light cross-on. This is a heavy-duty, expert-only day. The period is so long it might run a bit straight, but you won't care when you see the size.
Friday the 14th of August is still hefty at 8ft but the onshore wind (30 km/h) will make it a battle.
Best bets: the glassy windows on Thursday the 30th of July and Tuesday morning the 4th of August for clean, fun waves. The real standout is Thursday the 13th of August for the big-wave crew. Crowds are possible here on the good days, so be ready to share the lineup.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Sun afternoon. Very mild (max 14°C on Sat night, min 12°C on Thu night). Winds increasing (light winds from the NE on Thu night, fresh winds from the W by Sun afternoon). | Days 5-7 Weather SummarySome drizzle, heaviest during Sun night. Very mild (max 14°C on Wed afternoon, min 10°C on Tue night). Winds decreasing (fresh winds from the SW on Sun night, calm by Tue night). | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 13 | SSW 13 | SW 13 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 14 | SSW 21 | SSW 19 | SW 18 | SW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 299 | 215 | 183 | 276 | 751 | 1055 | 1005 | 657 | 592 | 1591 | 1196 | 1049 | 632 | 301 | 412 | 288 | 465 | 711 | 602 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross | cross-off | cross | cross | cross | cross | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-off | cross | cross | cross |
High Tide | 4:03AM0.01m | 4:21PM0.02m | 4:39AM0.01m | 4:32PM0.02m | 5:23AM0.01m | 4:40PM0.02m | 6:06AM0.01m | 4:45PM0.02m | 6:58AM0.01m | 4:39PM0.02m | 8:18AM0.01m | 4:12PM0.02m | |||||||
Low Tide | 11:23PM0.00m | 9:07AM0.00m | 11:26PM0.00m | 9:34AM0.00m | 11:41PM0.00m | 9:59AM0.01m | 11:53PM0.00m | 10:22AM0.01m | 00:02AM0.00m | 10:41AM0.01m | 00:19AM0.00m | 10:34AM0.01m | 00:30AM0.00m | ||||||
 |  |  |  | | | |  |  |  | | | | | |  | | | | |
 | — | 7:18 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:13 | — | — |
 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — |
mm | — | — | — | — | — | — | — | — | 5 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 13 | 14 | 14 |
Feels °C | 10 | 9 | 9 | 8 | 7 | 8 | 8 | 5 | 6 | 6 | 4 | 6 | 7 | 9 | 9 | 9 | 8 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SW 13 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 16 | SW 14 | SW 14 | SW 13 | SW 12 | SW 14 | SW 15 | SSW 19 | SW 18 | SW 16 |
| kJ | 299 | 215 | 183 | 276 | 751 | 1055 | 1005 | 657 | 592 | 1591 | 1196 | 1049 | 632 | 301 | 412 | 220 | 465 | 711 | 602 |
Swell 2 Height (m) Direction Period (s) | SW 23 | SSW 21 | SSW 20 | SSW 13 | SW 21 | SW 19 | WSW 7 | ENE 4 | NE 5 | — | — | — | SSW 18 | SSW 16 | SSW 22 | SSW 21 | SSW 14 | — | — |
| kJ | 20 | 44 | 149 | 113 | 18 | 96 | 10 | 2 | 4 | — | — | — | 31 | 102 | 45 | 288 | 246 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 22 | SSW 21 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 45 | 43 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 2 | N 3 | NNW 4 | N 4 | NW 5 | WSW 6 | WSW 6 | SW 6 | — | — | — | — | — | NE 3 | NNW 4 | N 3 |
| kJ | — | — | — | 1 | 6 | 9 | 6 | 57 | 121 | 75 | 47 | — | — | — | — | — | 3 | 6 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 2 | 18 | 100 | 19 | 100 | 165 | 101 | 546 | 499 | 499 | 256 | 13 | 14 | 0 | 100 | 17 | 14 |
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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