
Surf Forecasts:
Trespassers surf forecast from 14 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 12PM (local time) - 5.5ft (1.7m), 15s period, SSW swell with offshore winds.
- Most powerful swell: Tuesday 15 Sep, 9AM (local time) - 6ft (1.8m), 15s period, SW swell with 1,415 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 12PM (local time) - 5.5ft (1.7m), 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 Wednesday (Sep 16) at 12PM. The primary swell is predicted to be 1.7m 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 1.8m 15s and forecast to arrive on Tuesday (Sep 15) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Tuesday (Sep 15) at 3PM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Wed 16th Sep) | 5.5ft (1.7m) 15s |
| Best Surf | 12PM (Wed 16th Sep) | 5.5ft (1.7m) 15s |
| Most Powerful | 9AM (Tue 15th Sep) | 6ft (1.8m) 15s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
The Lowdown
G’day, Rusty here. Let me break down what’s on the cards for Trespassers over the next couple of weeks. We’re looking at a bit of a slow start, but there are a couple of windows that’ll get the heart rate up.
The water temp is sitting at a pretty normal 59°F for this time of year, so nothing wild there.
Right now and through the opening days, it’s a write-off. Monday (14th Sep) has a tiny 3ft SW swell but with a cross-on wind and combined energy reading 304, it’s choppy and poor. That afternoon bumps to 4ft but the onshore wind keeps it messy. Tuesday (15th) morning sees a solid jump to 6ft SSW swell (energy 1357), but the conditions are only marginal. Still, it’s cross-off and clean, so there’s a chance if you’re desperate. Wednesday (16th) is much the same story—6ft SSW, clean but marginal.
The first real standout comes on Thursday (17th) afternoon. The swell drops to a fun 3ft from the SSW, period 14 seconds (a proper groundswell), and the wind goes glassy—absolutely dead calm. Combined energy is 337, so it’s light but clean. This is the pick of the early window if you can sneak out. Friday (18th) through to Sunday (20th) drops right off into tiny, poor surf.
Now, Monday (21st) is a beauty. Morning session has 5ft SW swell (period 12 seconds) with glassy conditions and a light ENE breeze—looks like it’ll be clean and inviting. Then Monday afternoon: 3ft from the SSW with a very long 16-second period, flat calm and glassy. Combined energy sits at 701. This is the pick of the whole forecast if you ask me.
After that, we hit a dry patch from Tuesday (22nd) through to Friday (25th) with poor conditions all round—small swell, onshore or cross winds, and low energy.
A second notable window opens Saturday (26th) morning. Swell builds to 5ft from the SSW with a very long 17-second period and light cross-shore winds. Combined energy hits 2028, which is strong. It’s marginal surf, but the potential is there for some deep lines, especially if you’re on a point or reef setup. But later Saturday afternoon it gets messy with 7ft and a cross-on wind (energy 3811), so watch the timing.
Sunday (27th) keeps the size around 6-7ft from the SSW with cross-off winds and clean conditions. Energy is strong (2411 then 1775), but the size and period mean this is for experienced crew only.
Monday (28th) morning sees 7ft SW swell with a fresh offshore breeze—clean but heavy at 1896 energy. Monday afternoon drops to 5ft. Finally, Tuesday (29th) afternoon offers a last gem: 5ft SW swell with a 16-second period, cross-off wind, and clean lines. Combined energy is 1097, and the forecast says very good surf conditions. That’s a solid way to wrap up the run if you can wait.
Overall, Thursday the 17th afternoon and Monday the 21st are the true standouts for clean, manageable waves. Saturday the 26th morning and Tuesday the 29th afternoon are also worth marking in the calendar for the bigger, longer-period stuff.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Mon afternoon, min 9°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sat night, min 12°C on Thu afternoon). Wind will be generally light. | |||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 12 | SW 16 | SW 15 | SSW 14 | SW 14 | SSW 15 | SSW 15 | SW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SW 13 | SW 18 | WSW 13 | SW 15 | SW 14 |
Wave Graph | ||||||||||||||||||||
335 | 823 | 1415 | 1370 | 1220 | 1190 | 1238 | 930 | 545 | 402 | 222 | 412 | 287 | 136 | 120 | 85 | 81 | 186 | 322 | 886 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | cross | cross-off | cross-off | cross-off | off | cross-off | cross-off | glassy | cross-off | cross | cross | cross-off | cross | cross-off | cross-on | on | on | on |
High Tide | 5:27AM0.02m | 3:22PM0.01m | 6:03AM0.02m | 3:14PM0.01m | 6:41AM0.02m | 2:57PM0.01m | 7:39AM0.02m | 2:18PM0.02m | 1:34PM0.02m | 1:25PM0.02m | ||||||||||
Low Tide | 10:15PM-0.00m | 10:59AM0.01m | 10:29PM-0.00m | 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 | |||||||||
— | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:15 | — | — | |
6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:14 | — | — | 6:14 | — | — | 6:15 | — | — | 6:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 15 | 13 | 13 | 10 | 11 | 12 | 9 | 11 | 12 | 15 | 16 | 20 | 21 | 20 | 25 | 26 | 15 | 14 | 15 |
Feels °C | 12 | 11 | 7 | 7 | 5 | 6 | 7 | 5 | 8 | 10 | 11 | 10 | 16 | 17 | 13 | 19 | 20 | 10 | 9 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 18 | SSW 16 | SW 15 | SSW 14 | SW 14 | SSW 15 | SSW 15 | SW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 16 | SSW 15 | SSW 14 | SSW 13 | SW 13 | SW 12 | SSW 16 | SW 15 | SSW 14 |
80 | 103 | 1415 | 1370 | 1220 | 1190 | 1238 | 930 | 545 | 402 | 222 | 412 | 287 | 136 | 120 | 85 | 73 | 171 | 322 | 183 | |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 13 | SW 6 | — | — | — | — | — | — | E 3 | SSW 17 | — | NE 4 | WNW 6 | SW 20 | SSW 19 | SW 18 | ENE 4 | — | SW 9 |
31 | 17 | 11 | — | — | — | — | — | — | 1 | 184 | — | 2 | 7 | 15 | 35 | 81 | 2 | — | 37 | |
Swell 3 Height (m) Direction Period (s) | — | SW 16 | — | — | — | — | — | — | — | — | — | — | — | — | SW 20 | W 4 | W 6 | ENE 4 | — | — |
— | 41 | — | — | — | — | — | — | — | — | — | — | — | — | 15 | 2 | 3 | 2 | — | — | |
Wind waves Height (m) Direction Period (s) | SW 12 | SW 16 | SSW 4 | SSE 4 | SE 4 | SE 4 | ESE 4 | ESE 4 | ESE 3 | ENE 3 | — | NNW 4 | NNW 4 | — | NNW 3 | N 3 | N 3 | WSW 13 | W 6 | SW 14 |
335 | 823 | 24 | 17 | 11 | 7 | 6 | 6 | 2 | 1 | — | 6 | 5 | — | 5 | 6 | 7 | 186 | 163 | 886 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 138 | 13 | 13 | 13 | 13 | 11 | 0 | 2 | 0 | 0 | 0 | 100 | 14 | 0 | 100 | 79 | 17 | 1260 | 742 | 14 |
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.










