
Surf Forecasts:
Trespassers surf forecast from 16 Sep 2026:
- Best quality surf: Tuesday 22 Sep, 3PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with offshore winds.
- Most powerful swell: Tuesday 22 Sep, 3PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with 1,543 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 3AM (local time) - 4.5ft (1.4m), 15s 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 17) at 3AM. The primary swell is predicted to be 1.4m and 15s 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 1.7m 16s and forecast to arrive on Tuesday (Sep 22) at 3PM. Winds are predicted to be offshore 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 (Sep 22) at 9AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Thu 17th Sep) | 4.5ft (1.4m) 15s |
| Best Surf | 3PM (Tue 22nd Sep) | 5.5ft (1.7m) 16s |
| Most Powerful | 3PM (Tue 22nd Sep) | 5.5ft (1.7m) 16s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
Hey, Rusty here, checking the surf for Trespassers over the next two weeks. It’s a real rollercoaster, so listen up.
We start on Wednesday the 16th with some solid SSW swell near 6 ft, but a moderate cross-offshore breeze keeps things from being proper clean. The water temp is about average for the season – nothing to write home about – and the wave energy is packing a decent punch. Still, only a couple of so-so waves on offer.
From Friday the 18th through Monday the 21st, it’s pretty grim. Onshore winds and shifting gusts wreck the surface, and while there’s a little bump of swell on Sunday the 20th, it comes with fresh onshore wind. A total write-off.
Then comes the good stuff. Tuesday the 22nd is the real gem. You’ve got a solid 5 ft SSW groundswell with a 16-second period – that’s proper long-period juice. The wind is offshore from the east, light enough to leave it glassy. The swell energy reads around 1241 in the morning and builds to a big 1543 in the afternoon when it hits about 6 ft. This is over 5 ft, so it’s a bit stout for the groms, but for experienced surfers, this is the session of the month. Offshore wind and a long-period swell on a reef? Yes, please.
After that, Wednesday the 23rd and Thursday the 24th drop off to smaller, cleaner but average waves – nothing to rush for.
Looking at the long-range, Saturday the 26th has a big pulse of 6 ft SSW swell with a very long 19-second period. The wave energy is massive – nearly 2000! Wind is a brisk cross-offshore from the NNE. This one is over a week out, so it's a promising maybe, but for now, let’s just say it’s on the radar.
Sunday the 27th through the end of the forecast looks like onshore wind and poor quality, so that Saturday is your only other potential window.
So, to put it plainly: circle Tuesday the 22nd on your calendar. The rest is mostly waiting or getting blown out.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Fri night, min 9°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 11°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 17 | SSW 16 | SSW 15 | SSW 14 | SW 13 | SSW 13 | SW 18 | SW 16 | SW 15 | SW 12 | SW 13 | SW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 |
Wave Graph | |||||||||||||||||||||
1190 | 1238 | 863 | 545 | 337 | 261 | 422 | 291 | 178 | 142 | 114 | 83 | 264 | 838 | 396 | 629 | 1018 | 974 | 1241 | 1543 | 1040 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | cross | cross | cross | cross | cross-off | cross-off | on | on | cross-on | cross | cross | cross-off | off | off | off |
High Tide | 3:14PM0.01m | 6:41AM0.02m | 2:57PM0.01m | 7:39AM0.02m | 2:18PM0.02m | 1:34PM0.02m | 1:25PM0.02m | 1:32PM0.02m | 1:43PM0.02m | 3:20AM0.01m | |||||||||||
Low Tide | 11:23AM0.01m | 10:45PM-0.00m | 11:38AM0.01m | 11:03PM-0.00m | 11:26AM0.01m | 11:18PM0.00m | 11:27PM0.00m | 11:15PM0.00m | 10:31PM0.00m | 9:49PM0.00m | |||||||||||
6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:13 | — | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 10 | 11 | 12 | 14 | 16 | 19 | 20 | 20 | 24 | 24 | 17 | 15 | 14 | 13 | 14 | 11 | 12 | 13 | 13 |
Feels °C | 8 | 8 | 6 | 8 | 11 | 11 | 11 | 16 | 15 | 15 | 19 | 19 | 13 | 10 | 10 | 8 | 9 | 6 | 6 | 8 | 7 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SSW 15 | SSW 14 | SW 13 | SSW 13 | SW 12 | SW 16 | SSW 16 | SW 12 | SW 13 | SW 16 | SSW 15 | SSW 16 | SSW 16 | SSW 16 |
1190 | 1238 | 863 | 545 | 337 | 149 | 422 | 291 | 178 | 142 | 114 | 73 | 264 | 164 | 396 | 629 | 1018 | 974 | 1241 | 1543 | 1040 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | ESE 4 | E 3 | SSW 17 | — | NE 4 | W 6 | SW 20 | W 4 | SW 18 | — | SW 11 | SW 14 | — | SSW 16 | — | — | — | — |
— | — | — | 3 | 1 | 261 | — | 1 | 10 | 15 | 3 | 83 | — | 32 | 214 | — | 51 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | S 20 | SSW 19 | WSW 6 | NE 4 | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | 7 | 37 | 7 | 1 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 4 | SE 4 | — | — | — | NNW 4 | NW 4 | — | NNW 3 | NNW 3 | N 3 | W 5 | SW 15 | — | SSE 3 | SE 4 | SE 4 | E 4 | E 4 | E 4 |
14 | 7 | 7 | — | — | — | 5 | 5 | — | 4 | 4 | 7 | 27 | 838 | — | 1 | 3 | 7 | 17 | 9 | 7 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 7 | 11 | 0 | 0 | 0 | 138 | 14 | 17 | 17 | 0 | 100 | 17 | 733 | 160 | 13 | 13 | 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.










