
Surf Forecasts:
Trespassers surf forecast from 8 Aug 2026:
- Best quality surf: Sunday 9 Aug, 6PM (local time) - 4.5ft (1.4m), 15s period, SW swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 10ft (3.0m), 18s period, SW swell with 5,181 kJ wave energy.
- Next surfable swell (1★+): Sunday 9 Aug, 6PM (local time) - 4.5ft (1.4m), 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 Sunday (Aug 09) at 6PM. The primary swell is predicted to be 1.4m and 15s period with a secondary swell of 0.9m and 20s. Another secondary swell of 0.4m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 3.0m 18s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Sunday (Aug 09) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sun 9th Aug) | 4.5ft (1.4m) 15s |
| Best Surf | 6PM (Sun 9th Aug) | 4.5ft (1.4m) 15s |
| Most Powerful | 6AM (Mon 10th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright, mates, Rusty here. Let's talk about what's on the table for the next couple of weeks. It’s a bit of a mixed bag, so let's get into it.
Right off the bat, we've got some surf, but it's not worth getting too excited about. This Saturday afternoon (August 8th) at Trespassers (a reef break), there’s some chest-high swell at 5ft from the SW, with a long 15-second period. Water temp is sitting at 58°F, which is pretty much normal for this time of year. The wind is a cross-offshore breeze, which should keep things clean, but the forecast is calling it marginal, with questionable tide conditions. So, it’s a maybe, not a go-to.
Sunday (August 9th) drops off a bit in the morning, with smaller 4ft swell. The afternoon does pick up some energy, and the swell pushing 5ft from the SW at 16 seconds. The wind turns light onshore, which is less than ideal, and it’s still looking marginal. Not the best way to spend your weekend.
Then we hit a rough patch. From Monday (August 10th) through to Thursday (August 13th), the surf turns pretty ugly. We’ve got a lot of strong, onshore winds, with the swell jumping up over 8ft at times. On Wednesday (August 12th) morning, the energy is strong, but it's all wind-blown and lumpy. This is a mess, and unless you’re an expert looking for a battle, it’s not worth the paddle. This period is a write-off for clean waves.
By Friday (August 14th), the wind backs off a little, and we see the swell settle around 7ft from the SSW. But it's still got some cross-onshore wind in the mix, so conditions remain marginal.
Now, here’s where things start to turn around.
The standout window is the morning of Saturday, August 15th. We’ve got a 6ft SSW groundswell, with a 16-second period. The wind is a light 6 mph cross-offshore breeze from the SSE, and the forecast is calling for excellent conditions for experienced surfers. Those clean, lined-up waves are going to be worth it. This is your best bet of the whole outlook, so if you can, get out there.
The rest of that weekend (August 16th) keeps the clean conditions with light SE cross-offshore winds. The swell drops a bit to 4ft on Sunday morning and 4ft by the afternoon, but it’s still rideable and clean. It’s not as strong as Saturday, but a decent option.
The start of the next week, Monday (August 17th) and Tuesday (August 18th), looks okay. We're seeing some clean, smaller waves in the 3-4ft range from the SW, with light winds. It’s not going to blow your mind, but you can get a few fun ones in.
Then on Wednesday (August 19th), the wind swings around to the north, creating messy cross-shore conditions. We are back to choppy surf through to the end of the week. The swell is still there, but the conditions are junk.
Now, looking further out, we’ve got a promising sign for Saturday, August 23rd. The forecast shows the swell building back up to 7ft from the SW, with a long 19-second period. The wind is forecast to be a cross-offshore NNE breeze, which could make for some clean conditions. This is a long-range call, so treat it as promising but not a guarantee just yet. It's about a week and a half away, so we’ll have to keep an eye on it.
So, from Thursday (August 13th) through to Friday (August 14th), there's a real lull in decent conditions. The standout, by far, is Saturday morning. The rest of the time, you’re just picking through the scraps.
Later.
- Rusty
Short Range ForecastHeavy rain (total 29mm), heaviest during Sun afternoon. Very mild (max 15°C on Sun morning, min 10°C on Tue afternoon). Winds increasing (calm on Sun afternoon, near gales from the SW by Tue afternoon). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Very mild (max 15°C on Thu night, min 11°C on Tue night). Winds decreasing (strong winds from the WSW on Tue night, light winds from the SSW by Fri morning). | ||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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 14 | SW 16 | SW 15 | SW 19 | SW 17 | SW 16 | SW 16 | SW 14 | SSW 18 | SW 16 | SW 18 | SW 17 | SW 16 | SW 15 | SSW 15 | SSW 16 | SSW 17 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||
597 | 636 | 967 | 4665 | 4432 | 2790 | 1384 | 476 | 286 | 3937 | 4261 | 3904 | 2413 | 1962 | 1809 | 1699 | 1924 | 1855 | 1671 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | cross-on | cross | cross-off |
High Tide | 2:27PM0.02m | 2:49PM0.02m | 3:25AM0.00m | 3:12PM0.02m | 3:21AM0.00m | 3:33PM0.02m | 3:39AM0.01m | 3:46PM0.02m | 4:07AM0.01m | 3:58PM0.02m | |||||||||
Low Tide | 00:36AM0.00m | 00:10AM0.00m | 11:48PM0.00m | 6:22AM0.00m | 11:30PM0.00m | 7:28AM0.00m | 11:17PM0.00m | 8:17AM0.00m | 11:09PM0.00m | 8:54AM0.00m | 11:01PM0.00m | ||||||||
— | 7:09 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | |
— | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | |
mm | 7 | 2 | 10 | 3 | — | — | — | — | 7 | 2 | 2 | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 11 | 14 | 12 | 12 | 13 | 15 | 15 | 12 | 14 | 14 | 14 | 14 | 14 | 15 | 14 | 14 | 13 |
Feels °C | 8 | 10 | 9 | 8 | 4 | 6 | 8 | 7 | 7 | 2 | 6 | 7 | 9 | 10 | 10 | 12 | 12 | 12 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 16 | SW 15 | — | SW 16 | SW 16 | SW 16 | SW 14 | SW 10 | — | SW 18 | SW 16 | SW 16 | SW 15 | SSW 15 | SSW 16 | SSW 17 | SSW 16 | SSW 16 |
597 | 636 | 967 | — | 635 | 1031 | 1384 | 476 | 211 | — | 2147 | 443 | 2413 | 1962 | 1809 | 1699 | 1924 | 1855 | 1671 | |
Swell 2 Height (m) Direction Period (s) | — | — | E 5 | — | — | — | — | WSW 6 | SSW 14 | — | — | — | — | — | — | — | — | — | — |
— | — | 1 | — | — | — | — | 26 | 253 | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | NNE 5 | — | — | — | — | — | SSW 18 | — | — | — | — | — | — | — | — | — | — |
— | — | 13 | — | — | — | — | — | 286 | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 4 | N 4 | WNW 4 | SW 19 | SW 17 | SW 16 | W 5 | NW 5 | NW 5 | SW 16 | SW 18 | SW 17 | WSW 15 | — | WSW 15 | — | — | — | SE 3 |
41 | 10 | 13 | 4665 | 4432 | 2790 | 25 | 60 | 80 | 3937 | 4261 | 3904 | 1364 | — | 857 | — | — | — | 3 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 100 | 112 | 100 | 14 | 534 | 651 | 970 | 14 | 731 | 673 | 546 | 733 | 1184 | 748 | 733 | 722 | 160 | 13 | 13 |
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.











