
Surf Forecasts:
Trespassers surf forecast from 9 Sep 2026:
- Best quality surf: Thursday 10 Sep, 9AM (local time) - 6ft (1.8m), 16s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 10 Sep, 9AM (local time) - 6ft (1.8m), 16s period, SSW swell with 1,713 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 9AM (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 Thursday (Sep 10) at 9AM. The primary swell is predicted to be 1.8m and 16s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Trespassers in the next 16 days are 1.8m 16s and forecast to arrive on Thursday (Sep 10) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Thursday (Sep 10) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Thu 10th Sep) | 6ft (1.8m) 16s |
| Best Surf | 9AM (Thu 10th Sep) | 6ft (1.8m) 16s |
| Most Powerful | 9AM (Thu 10th Sep) | 6ft (1.8m) 16s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get stuck into what's on the cards for Trespassers.
The pattern ahead is a solid run of groundswell, but it's not all smooth sailing. We’ve got a decent window of clean, offshore conditions to kick things off before the wind turns ugly and then a much bigger, more powerful swell moves in later. The best bet is to jump on it early.
The water's sitting right on 59°, which is about average for this time of year, so no surprises there.
The pick of the whole period is Thursday, September 10th. The morning session is the standout. You’ve got a solid 6ft SSW groundswell with a long 16-second period, and the combined swell energy is pumping at a strong 1713. The wind is a clean offshore easterly at 16 mph, and the sky is clear. It's going to be punchy, powerful, and clean. This is proper advanced territory at that size, so leave the foamies at home. The afternoon holds up too, dropping a touch to 5ft with the same offshore breeze, but the morning is where it's at.
Friday, September 11th is a great follow-up. The swell eases back to a very manageable 4ft, still from the SSW with that long period around 15-16 seconds. The wind stays offshore all day, light and clean. The morning has a gentle offshore breeze, the afternoon is even lighter. This is your best window for a wider range of ability if Thursday looks a bit too gnarly.
Saturday, September 12th sees the wind start to shift. The swell holds at 4ft, but the wind goes cross-offshore from the NNE. It’s still clean but not as polished as the previous days. Still a good session, but the magic is fading.
Then we hit a rough patch. From Sunday, September 13th through to Monday, September 14th, the wind gets messy—cross, cross-on, and onshore. The swell drops right off too. The setup looks more interesting for kite surfing than paddle surfing.
Now, the surf fires back up on Tuesday, September 15th. The morning has a bit of a cross-off breeze, but the afternoon session is the one to watch. The swell jumps back to 6ft from the SW, with a combined energy of 1321, and the wind goes clean offshore from the ESE. That’s a solid, powerful wave again.
Wednesday, September 16th is a stunner. The morning has a gentle offshore breeze and 6ft SSW swell. But the afternoon is a gem—the wind dies completely to glassy conditions. Zero wind, clean faces, and a solid 5ft SSW groundswell. That’s a rare and beautiful thing.
After that, the wind turns ugly again from Thursday, September 17th through to Sunday, September 20th. The swell is inconsistent and the wind is all over the shop. Sunday afternoon brings a jump in size to 8ft, but it's cross-onshore and lumpy. Not worth paddling out.
Looking into the second week, the pattern gets more interesting but less certain. Monday, September 21st and Tuesday, September 22nd see a serious pulse of energy. On Monday, the swell is 7ft with a clean cross-offshore wind—that’s a big, powerful day. Tuesday morning pushes up to 7ft with a combined energy of 4326, which is a massive amount of power. But the wind is a cross-shore, and it’s likely only for experts. The wind gets messy again Tuesday afternoon. Wednesday, September 23rd and Thursday, September 24th hold solid 5-6ft swell with clean cross-offshore winds, offering some decent windows. The real wildcard is Friday, September 25th. The swell is 6ft but the period stretches out to a very long 18 seconds. That’s a lot of water moving, and at a beach/reef setup like Trespassers, that long period might make it break a bit too straight for the banks. It will be powerful, but a bit of a gamble.
To wrap it up: Thursday morning (Sep 10th) and Wednesday afternoon (Sep 16th) are your absolute best bets for clean, powerful waves. The long-range stuff around Sep 21st-22nd is promising but less certain.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Sat night, min 10°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun morning, min 10°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SSW 15 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 |
Wave Graph | |||||||||||||||||||||
1713 | 1273 | 740 | 674 | 870 | 926 | 832 | 632 | 377 | 458 | 739 | 226 | 162 | 485 | 418 | 1297 | 1321 | 1002 | 1255 | 1178 | 730 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | cross-off | cross-off | off | cross-off | off | glassy | cross-off |
High Tide | 2:54PM0.02m | 3:44AM0.01m | 3:06PM0.02m | 4:03AM0.01m | 3:15PM0.02m | 4:29AM0.02m | 3:21PM0.02m | 5:01AM0.02m | 3:19PM0.02m | 5:27AM0.02m | 3:22PM0.01m | 6:03AM0.02m | 3:14PM0.01m | ||||||||
Low Tide | 10:01PM0.00m | 8:36AM0.01m | 9:57PM0.00m | 9:18AM0.01m | 9:54PM0.00m | 9:56AM0.01m | 10:01PM-0.00m | 10:30AM0.01m | 10:15PM-0.00m | 10:59AM0.01m | 10:29PM-0.00m | 11:23AM0.01m | 10:45PM-0.00m | ||||||||
6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | |
— | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 11 | 12 | 12 | 15 | 16 | 16 | 18 | 20 | 21 | 20 | 16 | 13 | 16 | 17 | 13 | 12 | 13 | 10 | 13 | 13 | 14 |
Feels °C | 6 | 7 | 8 | 12 | 13 | 13 | 14 | 16 | 16 | 16 | 12 | 10 | 12 | 13 | 9 | 8 | 9 | 6 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 18 | SW 13 | SSW 15 | SW 14 | SW 14 | SSW 15 | SSW 15 | SSW 15 |
1713 | 1273 | 740 | 674 | 870 | 926 | 832 | 632 | 377 | 458 | 223 | 226 | 162 | 80 | 418 | 1297 | 1321 | 1002 | 1255 | 1178 | 730 | |
Swell 2 Height (m) Direction Period (s) | — | S 26 | S 25 | — | — | — | — | — | SSW 19 | ENE 4 | — | — | SSW 19 | SSW 18 | SW 16 | — | — | — | — | ENE 3 | — |
— | 13 | 13 | — | — | — | — | — | 136 | 2 | — | — | 37 | 31 | 130 | — | — | — | — | 1 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSW 16 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 26 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | ESE 4 | ESE 4 | ESE 4 | ESE 3 | ESE 3 | ESE 3 | ENE 3 | ENE 3 | NE 3 | N 4 | SW 16 | WSW 5 | WSW 6 | SW 14 | SSW 3 | SE 3 | — | ESE 4 | ESE 4 | — | — |
22 | 9 | 11 | 5 | 2 | 2 | 1 | 1 | 2 | 19 | 739 | 27 | 40 | 485 | 2 | 2 | — | 10 | 4 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 18 | 159 | 159 | 138 | 499 | 138 | 13 | 11 | 0 | 11 | 0 | 0 | 0 |
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.










