
Surf Forecasts:
Trespassers surf forecast from 11 Aug 2026:
- Best quality surf: Friday 14 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 12PM (local time) - 7.5ft (2.3m), 17s period, SW swell with 3,148 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 9PM (local time) - 5.5ft (1.7m), 16s 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 (Aug 14) at 9PM. 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 2.3m 17s and forecast to arrive on Wednesday (Aug 12) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Aug 17) at 3PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 14th Aug) | 5.5ft (1.7m) 16s |
| Best Surf | 9PM (Fri 14th Aug) | 5.5ft (1.7m) 16s |
| Most Powerful | 12PM (Wed 12th Aug) | 7.5ft (2.3m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here, dialing in the local lineup for the next couple of weeks. We’ve got one spot on the radar, and it’s a bit of a tricky one.
Right now, the water temp is sitting about average for the time of year, so no surprises there.
The action starts off a bit rough. Wednesday the 12th is a write-off with a strong, lumpy, cross-onshore mess. That solid 8ft SW groundswell is just getting thrashed by the wind. We've got a lot of energy in the water (4170) but it's not for paddling, this is more of a kite-surfing kind of setup. A big, long-period groundswell like this will be walling up on the beach, so it's no good for the average surfer anyway.
The next couple of days into Thursday and Friday are still marginal. The swell holds around 7ft, but it's onshore or light cross-onshore, keeping the quality way down. The energy is still strong (over 1800), but it's messy.
Finally, things start to clean up for the weekend. Saturday morning, August 15th is the first real standout. A clean, cross-offshore breeze from the ESE will groom the dropping 6ft SSW swell. The energy is still moderate (1415), and the conditions are clean. This is a good window for experienced surfers, as that 6ft is a proper size. The long 16-second period will have good power, but it might be a bit straight at the beach, so be aware.
Sunday the 16th and Monday the 17th see the swell drop, but the wind stays clean. Monday afternoon is a real sleeper: a 4ft SW swell with a clean offshore breeze, and the energy is moderate (848). The conditions are described as very good, and with a 16-second period, it'll be a fun, manageable, and clean day.
We then hit a bit of a lull from the 18th through the 21st. The swell goes flat, the wind gets messy, and the energy drops to weak levels. It's a dry spell.
Then, on the 22nd, we get a pulse back. Saturday afternoon, August 22nd is a solid call. A 5ft SW swell with a clean offshore breeze from the ENE. The energy is moderate (1017), and the conditions are very good. This is a nice, clean option.
The 23rd and 24th are a write-off again with a strong SSW swell (7ft) and nasty cross-onshore winds. That energy is huge (4942) but it's all for the wind.
The real magic might be in the longer range. Tuesday afternoon, August 25th is a serious standout. The wind goes glassy, completely calm. A 7ft SW groundswell with glassy conditions is a rare treat. The energy is strong (2303). This is excellent for experienced surfers, but the perfect conditions will make it a memorable session. It's a long-range call, so it's a promise, but it's a good one.
After that, the 26th and 27th look like a messy drop-off with onshore winds and weak energy, so the window closes.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Tue night. Very mild (max 14°C on Wed afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SW on Tue night, light winds from the SW by Fri morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Mon afternoon, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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 17 | SW 17 | SW 17 | SW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||
2259 | 3052 | 2912 | 2349 | 2007 | 1613 | 1904 | 1855 | 1713 | 1692 | 1415 | 1241 | 720 | 647 | 476 | 463 | 551 | 729 | 489 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off |
High Tide | 3:21AM0.00m | 3:33PM0.02m | 3:39AM0.01m | 3:46PM0.02m | 4:07AM0.01m | 3:58PM0.02m | 4:36AM0.01m | 4:09PM0.02m | 5:16AM0.01m | 4:06PM0.02m | 5:56AM0.01m | 4:06PM0.02m | |||||||
Low Tide | 11:30PM0.00m | 7:28AM0.00m | 11:17PM0.00m | 8:17AM0.00m | 11:09PM0.00m | 8:54AM0.00m | 11:01PM0.00m | 9:35AM0.01m | 11:05PM0.00m | 10:09AM0.01m | 11:10PM0.00m | 10:39AM0.01m | 11:20PM-0.00m | ||||||
— | 7:07 | — | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | |
— | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | |
mm | 5 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 13 | 13 | 15 | 16 | 16 |
Feels °C | 7 | 7 | 8 | 10 | 11 | 10 | 11 | 12 | 12 | 11 | 9 | 9 | 9 | 8 | 8 | 10 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SSW 18 | SSW 17 | SW 16 | SSW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 15 |
1050 | 1118 | 996 | 2349 | 2007 | 1613 | 1904 | 1855 | 1713 | 1692 | 1415 | 1241 | 720 | 647 | 476 | 463 | 551 | 729 | 489 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | SW 22 | SW 19 |
204 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 22 | 119 | 380 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SW 17 | SW 17 | SW 17 | — | — | — | — | — | — | — | SE 3 | SE 3 | ESE 4 | ESE 3 | ESE 3 | ESE 4 | ESE 4 | E 4 | E 4 |
2259 | 3052 | 2912 | — | — | — | — | — | — | — | 2 | 1 | 8 | 2 | 3 | 5 | 4 | 15 | 7 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 165 | 742 | 733 | 160 | 13 | 160 | 14 | 13 | 13 | 0 | 0 | 11 | 7 | 0 | 0 | 0 | 0 | 0 | 2 |
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.











