Surf Forecasts:
Trespassers surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 9PM (local time) - 6ft (1.8m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 14 Aug, 3AM (local time) - 6.5ft (2.0m), 16s period, SSW swell with 2,077 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 9PM (local time) - 6ft (1.8m), 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 1.8m 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 2.0m 16s and forecast to arrive on Friday (Aug 14) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 18) at 3AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Fri 14th Aug) | 6ft (1.8m) 16s |
| Best Surf | 9PM (Fri 14th Aug) | 6ft (1.8m) 16s |
| Most Powerful | 3AM (Fri 14th Aug) | 6.5ft (2.0m) 16s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
G’day, Rusty here. Right, let’s have a look at the next stretch. It’s a bit of a slow burn, to be honest. There’s a patchy start, a couple of decent days in the middle, and then things get pretty messy out there. The water temp is sitting at 58.5°F, which is about normal for this time of year, so the wetsuit is the same as always.
First real window of interest kicks off on Saturday the 15th. We’ve got a solid SSW groundswell running at 5.6ft, with a long 16-second period. The wind is offshore from the ESE, light and clean. That’s a proper combo at Trespassers (reef). The crowd factor is listed as “sometimes,” so you might get lucky and have it to yourself, but be ready for a few others. This is the standout of the first week. The energy is moderate to strong, coming in at 1339. It’s a good one.
Sunday the 16th pulls back a bit, dropping to 3.9ft but still with that clean offshore ESE breeze. It’s smaller, a bit more relaxed, good for getting some fun ones without too much hassle. The energy drops to 614, so it’s weaker but still clean. Monday the 17th looks similar, 3.9ft of SW swell with a long 16-second period and a gentle offshore flow, ENE in the arvo. Clean again, but the size is on the smaller side, energy at 770 and 839. It’s worth a paddle if you just want to get wet.
Then we hit a wall on Tuesday the 18th. The wind swings to a fresh NNE breeze, cross-off. It’s clean but the swell drops right down to 3.6ft and the energy fades to 811. It’s okay, but nothing to write home about. From the 19th onwards, it gets a bit hopeless. The swell is small, the wind gets messy, onshore and lumpy. There’s a bit of a pulse forecast for the 22nd, with 4.6ft of SW swell and energy at 1090, but the wind is a strong cross-onshore NW, making it total slop. Not for the paddle.
There’s another pulse around the 25th, with the swell bumping up to 4.9ft and a very long 19-second period, energy jumping to 2265. The wind is a fresh cross-shore from the N, which keeps it lumpy and cross-chop. Looks more like a kite session than a surf. The run of poor conditions continues right through to the 28th, where things just fade out. So, the takeaway is: get on it early, Saturday the 15th is your best bet, then a couple of smaller, clean ones after. After that, it’s a waiting game.
Short Range ForecastMostly dry. Very mild (max 15°C on Thu night, min 12°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Tue night. Very mild (max 16°C on Mon afternoon, min 12°C on Sun morning). Winds increasing (light winds from the ESE on Sun night, fresh winds from the NNW by Tue night). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
AM | 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) | SSW 16 | SW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 14 | SSW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 14 |
Wave Graph | |||||||||||||||||||||
2178 | 1730 | 1953 | 2002 | 1809 | 1671 | 1339 | 1225 | 711 | 614 | 553 | 463 | 748 | 720 | 489 | 695 | 464 | 255 | 223 | 305 | 492 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | cross | cross-off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-on | on | on |
High Tide | 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 | 6:39AM0.01m | 3:55PM0.02m | 7:35AM0.01m | 3:32PM0.02m | ||||||||
Low Tide | 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 | 11:01AM0.01m | 11:29PM-0.00m | 11:06AM0.01m | 11:48PM-0.00m | ||||||||
7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | |
— | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — | — | — |
Temp °C | 14 | 14 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 13 | 15 | 16 | 14 | 15 | 16 | 16 | 14 | 14 | 14 |
Feels °C | 10 | 10 | 12 | 12 | 12 | 12 | 10 | 9 | 8 | 8 | 7 | 10 | 12 | 13 | 10 | 10 | 11 | 10 | 9 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SW 14 | SSW 14 | SW 14 | SW 16 | SW 16 | SW 15 | SW 17 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 14 |
2178 | 1730 | 1953 | 2002 | 1809 | 1671 | 1339 | 1225 | 711 | 614 | 553 | 463 | 748 | 720 | 489 | 695 | 464 | 255 | 223 | 305 | 492 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | SW 22 | SSW 19 | SSW 17 | E 4 | ENE 4 | W 4 | W 4 | SW 18 |
— | — | — | — | — | — | — | — | — | — | — | — | 22 | 119 | 329 | 116 | 4 | 1 | 10 | 6 | 260 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 8 | SW 21 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 68 | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ESE 3 | ESE 3 | E 4 | ESE 4 | ESE 4 | ESE 4 | ESE 3 | ESE 4 | ENE 4 | NE 4 | N 4 | NNW 3 | W 5 | — | E 3 |
— | — | — | — | — | — | 2 | 3 | 6 | 4 | 7 | 5 | 2 | 2 | 12 | 14 | 9 | 5 | 10 | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 67 | 160 | 13 | 13 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 18 | 164 | 164 | 100 | 159 | 17 | 17 |
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.











