Surf Forecasts:
Trespassers surf forecast from 5 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 6AM (local time) - 5ft (1.5m), 18s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 3PM (local time) - 7ft (2.2m), 18s period, SSW swell with 2,928 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 3AM (local time) - 3.5ft (1.1m), 13s 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 Monday (Sep 07) at 3AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.1m and 22s. 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 2.2m 18s and forecast to arrive on Wednesday (Sep 09) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Wednesday (Sep 09) at 6AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 7th Sep) | 3.5ft (1.1m) 13s |
| Best Surf | 6AM (Tue 8th Sep) | 5ft (1.5m) 18s |
| Most Powerful | 3PM (Wed 9th Sep) | 7ft (2.2m) 18s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Right, listen up. Rusty here, and I’ve got the local gen on what’s coming for our reef setup. Let’s not beat around the bush.
We’ve got a bit of a slow burn start, but the second half of this 16-day window is shaping up to be a proper event. The first few days are a write-off for quality surfing; the wind is all wrong, and the conditions are just plain messy. We’re looking at a gap of about 4 days before things start to turn.
The first real glimmer of hope comes on Monday the 8th of September. A solid SSW groundswell at 5ft is pushing in, and with a light SE cross-offshore breeze, Trespassers is going to be clean. The water is sitting at 59°, which is about average for this time of year, so a spring suit will be fine. The combined energy is moderate (1215). This is for the experienced crew, though, as it’s a reef setup and the swell is at the upper end of the fun zone.
Tuesday the 9th of September is a standout. The swell bumps up to 7ft from the SSW, with a very long period of 19 seconds. The wind is a clean SE cross-off. This is big, powerful, and will be barrelling on the reef. The combined energy is very strong (2754). This is expert-only territory, no question. It’s a serious session.
Thursday the 11th of September is the absolute gem of the forecast. The swell drops back to a more manageable 4ft, but the wind goes glassy, and the direction is a perfect offshore ENE. The water is still clean. This is the one for the connoisseur. The combined energy is moderate (600), but the quality of the wave will be world-class. This is the pick of the bunch.
After that, the wind gets messy again, and we see a long gap with poor conditions and strong onshore winds until the very end of the run. The final day, Monday the 21st of September, is a monster. A 12ft SW groundswell with a 18-second period, and the wind is light and glassy from the north. The combined energy is astronomical (8839). This is a massive, dangerous, and incredibly powerful swell. For the big-wave specialists only. The afternoon session with glass off is the stuff of legend.
So, to wrap it up. The best bets are Thursday the 11th of September for a clean, classic session, and the Monday the 21st of September for the big-wave crew. The rest of the time, you’re either waiting for the wind to play ball or the swell is too messy. Keep an eye on the charts, but those two days are the ones to circle.
Rusty.
Short Range ForecastMostly dry. Very mild (max 15°C on Mon morning, min 10°C on Mon night). Winds increasing (light winds from the SSE on Mon morning, fresh winds from the SSE by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Fri afternoon, min 10°C on Wed morning). Winds decreasing (fresh winds from the SE on Wed morning, calm by Fri afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1215 | 924 | 586 | 282 | 264 | 828 | 1352 | 1214 | 1155 | 2753 | 2928 | 2521 | 1904 | 1517 | 840 | 576 | 693 | 798 | 608 | 372 | 248 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | glassy | cross-off | cross | cross | cross |
High Tide | 1:36PM0.02m | 1:58PM0.02m | 2:19PM0.02m | 3:31AM0.01m | 2:38PM0.02m | 3:27AM0.01m | 2:54PM0.02m | 3:44AM0.01m | 3:06PM0.02m | 4:03AM0.01m | 3:15PM0.02m | ||||||||||
Low Tide | 11:24PM0.00m | 10:57PM0.00m | 10:30PM0.00m | 6:48AM0.01m | 10:12PM0.00m | 7:49AM0.01m | 10:01PM0.00m | 8:36AM0.01m | 9:57PM0.00m | 9:18AM0.01m | 9:54PM0.00m | ||||||||||
 |  |  | | | |  | |  | | | | | | | | | | | | | |
 | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — |
 | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 13 | 15 | 13 | 11 | 12 | 12 | 11 | 12 | 13 | 10 | 13 | 14 | 12 | 14 | 16 | 16 | 17 | 20 | 21 |
Feels °C | 11 | 11 | 10 | 13 | 10 | 7 | 10 | 7 | 6 | 6 | 7 | 5 | 9 | 10 | 8 | 12 | 15 | 14 | 12 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 15 | SSW 16 | SSW 15 | SSW 15 | SW 14 |
| kJ | 1215 | 924 | 586 | 282 | 264 | 828 | 1352 | 1214 | 1155 | 2753 | 2928 | 2521 | 1904 | 1517 | 840 | 576 | 693 | 798 | 608 | 372 | 248 |
Swell 2 Height (m) Direction Period (s) | — | — | S 23 | SSW 21 | SSW 21 | SW 13 | — | — | — | SW 4 | — | — | — | S 26 | SW 25 | ESE 4 | — | — | — | — | SW 18 |
| kJ | — | — | 11 | 45 | 170 | 238 | — | — | — | 1 | — | — | — | 13 | 25 | 2 | — | — | — | — | 157 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | — | — | — | — | W 5 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 22 | — | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | — | — | SSW 3 | SSE 3 | — | SE 4 | — | — | SSW 4 | SSE 5 | SE 5 | SE 5 | SE 4 | ESE 4 | ESE 4 | — | — | ESE 3 | NNE 3 | N 3 | N 2 |
| kJ | — | — | 1 | 1 | — | 3 | — | — | 18 | 64 | 49 | 26 | 6 | 5 | 11 | — | — | 2 | 3 | 2 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 13 | 13 | 0 | 0 | 0 | 0 | 553 | 13 | 1221 | 1250 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 19 | 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.
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