
Surf Forecasts:
Trespassers surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 9AM (local time) - 5ft (1.5m), 17s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 12PM (local time) - 7.5ft (2.3m), 19s period, SSW swell with 3,649 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 9AM (local time) - 3ft (0.9m), 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 9AM. The primary swell is predicted to be 0.9m and 13s period with a secondary swell of 0.2m and 21s. 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 19s and forecast to arrive on Wednesday (Sep 09) at 12PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 09) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 7th Sep) | 3ft (0.9m) 13s |
| Best Surf | 9AM (Tue 8th Sep) | 5ft (1.5m) 17s |
| Most Powerful | 12PM (Wed 9th Sep) | 7.5ft (2.3m) 19s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s talk about what’s happening at Trespassers over the next couple of weeks.
We’ve got a bit of a rough start, but there’s some real quality waiting for us if we’re patient. The early days are a write-off with strong westerly winds and messy, blown-out conditions. Saturday the 5th is a total no-go with 28 mph winds ruining the 8 ft SW swell. Sunday the 6th is still marginal, with a bit of cross-shore wind and a 6 ft to 5 ft SW groundswell that’s got a nice 14-second period, but the wind angle keeps it from being clean.
The real turning point comes Monday morning the 7th. The wind swings light offshore from the ESE, and the water goes glassy. The swell drops to 3 ft from the SW with a 13-second period – it’s small, but those conditions are going to be pure joy. The combined energy is weak (327), but those clean, groomed lines will make it feel like twice the size. This is a solid window for a longboard or a fun fish.
The standout of the whole period is Tuesday morning the 8th. We’ve got a 5 ft SSW swell pumping in with a super-long 17-second period. The wind is light cross-offshore from the SE, and the water is clean. The combined energy is moderate to strong (1352). This is a classic Trespassers session – the long period groundswell will wrap beautifully around this reef point, offering some powerful, walled-up waves. This is for advanced surfers only, as the sets will have some real punch. The water temperature is about average for this time of year. Expect crowds are possible here.
The quality continues through the rest of the week. Wednesday and Thursday the 9th and 10th see a building swell with 6 ft to 8 ft SSW groundswell, but the wind gets a bit stronger, keeping it in the "good but not epic" category. Thursday afternoon shapes up nicely with a clean 6 ft SSW swell and offshore ESE winds. The combined energy is strong (1705). The week ends on a high note with clean, offshore winds and 4 ft SSW swell on Friday the 11th and Saturday the 12th.
After Saturday the 12th, the swell fades fast. Sunday the 13th is clean but small, and from Monday the 14th onward, it’s a long stretch of tiny, weak surf and often poor conditions. The wind stays onshore or cross-off, but the energy is just gone. There’s a big gap of several days with no real recommendations, so don’t hold your breath for the second week.
This is Rusty, signing off.
Short Range ForecastSome drizzle, heaviest during Sat morning. Very mild (max 16°C on Fri night, min 11°C on Sun night). Winds decreasing (strong winds from the WNW on Fri night, light winds from the SSW by Sun morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 13°C on Tue morning, min 10°C on Wed night). Winds increasing (light winds from the SE on Tue morning, fresh winds from the SSE by Tue night). | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 15 | SW 9 | SW 12 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
Wave Graph | |||||||||||||||||||
1178 | 1238 | 2078 | 2110 | 1215 | 924 | 586 | 282 | 261 | 828 | 1352 | 1214 | 1373 | 1469 | 3200 | 2952 | 2236 | 1692 | 1069 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | cross | cross-on | cross | cross-off | off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off |
High Tide | 1:17PM0.02m | 1:36PM0.02m | 1:58PM0.02m | 2:19PM0.02m | 3:31AM0.01m | 2:38PM0.02m | 3:27AM0.01m | 2:54PM0.02m | |||||||||||
Low Tide | 11:34PM-0.00m | 11:35PM0.00m | 11:24PM0.00m | 10:57PM0.00m | 10:30PM0.00m | 6:48AM0.01m | 10:12PM0.00m | 7:49AM0.01m | 10:01PM0.00m | ||||||||||
— | 6:37 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:30 | — | — | |
6:04 | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:08 | — | |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 14 | 12 | 13 | 13 | 13 | 12 | 13 | 11 | 12 | 13 | 11 |
Feels °C | 12 | 3 | 4 | 9 | 12 | 11 | 10 | 10 | 11 | 9 | 11 | 8 | 9 | 4 | 5 | 5 | 8 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | — | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 19 | SSW 17 | SSW 16 | SW 16 | SSW 16 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 |
1178 | 259 | — | 2110 | 1215 | 924 | 586 | 282 | 261 | 828 | 1352 | 1214 | 1200 | 1469 | 3200 | 2952 | 2236 | 1692 | 1069 | |
Swell 2 Height (m) Direction Period (s) | NE 4 | — | — | SSW 20 | — | — | S 23 | SSW 21 | SW 21 | SSW 13 | — | — | — | SSW 20 | — | — | — | S 26 | SW 25 |
1 | — | — | 37 | — | — | 11 | 45 | 212 | 257 | — | — | — | 1207 | — | — | — | 13 | 24 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | W 5 | SW 9 | SW 12 | — | — | — | SSW 2 | SE 3 | SE 3 | ESE 3 | — | — | SSW 16 | SSE 5 | SE 5 | SE 5 | ESE 5 | ESE 4 | ESE 4 |
58 | 1238 | 2078 | — | — | — | 1 | 1 | 2 | 4 | — | — | 1373 | 97 | 62 | 50 | 27 | 21 | 26 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 730 | 1041 | 1184 | 59 | 11 | 13 | 11 | 0 | 0 | 0 | 0 | 344 | 748 | 1221 | 1806 | 733 | 11 | 0 | 11 |
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.










