Surf Forecasts:
Trespassers surf forecast from 6 Aug 2026:
- Best quality surf: Friday 7 Aug, 3AM (local time) - 5.5ft (1.7m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 12PM (local time) - 11ft (3.5m), 19s period, SW swell with 8,501 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 3AM (local time) - 5.5ft (1.7m), 16s 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 (Aug 07) at 3AM. The primary swell is predicted to be 1.7m and 16s period. 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 3.5m 19s and forecast to arrive on Wednesday (Aug 12) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Aug 08) at 6PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 7th Aug) | 5.5ft (1.7m) 16s |
| Best Surf | 3AM (Fri 7th Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 12PM (Wed 12th Aug) | 11ft (3.5m) 19s |
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 Trespassers is serving up over the next couple of weeks. Gotta be honest, it’s a bit of a messy start, but there is some light at the end of the tunnel.
The immediate outlook is pretty grim. We’ve got some solid swell pushing in right from the get-go, with a massive 1418 (moderate wave energy) on Friday morning from the SW, but a strong northerly breeze has it all chopped up and cross-off. It’s a write-off. The wind stays nasty right through the weekend and into early next week, with strong cross-onshore winds ruining what could be some serious swell. Monday the 12th looks particularly angry, with a 10 ft SW swell and near-gale force winds—that’s a hard pass for anyone on a surfboard, maybe worth a look for the kite crew. The water temp is about average for this time of year, nothing wild there.
Things finally start to clean up on Saturday the 15th. The wind swings around to a light southeasterly, going glassy in the afternoon. That’s the standout window. We’re looking at a clean 6 ft SSW groundswell in the morning, dropping to a glassy 5 ft from the SW in the afternoon. The energy is moderate (1356 in the morning), but the conditions will be pristine. This is the one to circle. It’s a reef break, so it’ll handle that long-period SW groundswell well, offering up proper, lined-up waves. It’s advanced-level territory, but for those with the skills, it’ll be firing. The crowds are listed as "sometimes," so expect some company, but with conditions that good, it’ll be worth sharing.
Sunday the 16th and Monday the 17th keep the clean theme going with light winds and smaller, but fun, SW swell around 3-4 ft. Good for a longboard or a fish. The energy is low, but the surf will be clean and user-friendly for the more experienced crew.
The second week sees a return of onshore winds and messy conditions mid-week around the 20th, but there’s a final silver lining. Saturday the 22nd looks promising again, with a light cross-off breeze from the SSE and a clean 3 ft SW swell on the cards. It’s a long way out, so take it with a pinch of salt, but it’s something to hope for.
So, to sum it up: forget the first week. The real deal is Saturday the 15th. Be there for the morning session for the best mix of size and glass.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Sun morning. Very mild (max 17°C on Sat afternoon, min 11°C on Sun morning). Winds increasing (light winds from the ENE on Thu night, strong winds from the SW by Sun morning). | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Tue night. Very mild (max 17°C on Tue afternoon, min 11°C on Sun night). Winds increasing (light winds from the NW on Mon afternoon, near gales from the WNW by Tue afternoon). | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 16 | SW 15 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SW 13 | SW 17 | SW 19 | SW 18 | WSW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 1133 | 1412 | 1305 | 964 | 883 | 784 | 658 | 2007 | 2534 | 6037 | 4040 | 2610 | 1178 | 726 | 480 | 3974 | 6686 | 7126 | 5809 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross | cross-on | on | cross-on | cross-on |
High Tide | 2:07PM0.02m | 2:08PM0.02m | 2:27PM0.02m | 2:49PM0.02m | 3:25AM0.00m | 3:12PM0.02m | 3:21AM0.00m | 3:33PM0.02m | |||||||||||
Low Tide | 00:39AM0.00m | 00:42AM0.00m | 00:36AM0.00m | 00:10AM0.00m | 11:48PM0.00m | 6:22AM0.00m | 11:30PM0.00m | 7:28AM0.00m | 11:17PM0.00m | ||||||||||
 |  |  |  |  |  |  | | | |  | |  | | | |  | |  | |
 | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — |
 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — |
mm | — | — | 1 | 3 | — | 4 | 4 | 5 | 2 | 1 | — | — | — | — | 1 | 4 | 1 | — | — |
Temp °C | 14 | 14 | 15 | 14 | 15 | 17 | 14 | 12 | 12 | 12 | 13 | 13 | 13 | 15 | 17 | 12 | 13 | 13 | 13 |
Feels °C | 13 | 9 | 10 | 11 | 11 | 13 | 8 | 3 | 2 | 2 | 7 | 7 | 7 | 6 | 9 | 3 | 3 | 5 | 8 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | NE 5 | — | — | — | SW 16 | SW 16 | SW 14 | SW 13 | SSW 18 | SSW 19 | — | WSW 16 |
| kJ | 1133 | 1412 | 1305 | 964 | 883 | 784 | 658 | 1 | — | — | — | 2610 | 1178 | 726 | 480 | 32 | 913 | — | 5809 |
Swell 2 Height (m) Direction Period (s) | SW 6 | — | NNW 5 | — | ENE 4 | NE 4 | WSW 5 | NNE 5 | — | — | — | — | — | WSW 6 | E 6 | — | — | — | — |
| kJ | 8 | — | 8 | — | 4 | 1 | 5 | 2 | — | — | — | — | — | 4 | 3 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | NE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NNW 4 | NW 3 | NNW 4 | NNW 4 | NW 4 | N 4 | WSW 16 | SW 15 | SW 19 | SW 17 | — | WNW 5 | NW 6 | NW 5 | SW 17 | SW 19 | SW 18 | SW 16 |
| kJ | — | 6 | 3 | 16 | 10 | 10 | 35 | 2007 | 2534 | 6037 | 4040 | — | 64 | 110 | 134 | 3974 | 6686 | 7126 | 4396 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 100 | 100 | 100 | 100 | 17 | 100 | 487 | 435 | 553 | 970 | 17 | 14 | 1034 | 1034 | 1095 | 1184 | 1186 | 160 |
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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