Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 8 pm 01 Sep 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
15.2°C
0.7° 

Trespassers surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Trespassers surf forecast from 1 Sep 2026:

  • Best quality surf: Friday 4 Sep, 12AM (local time) - 7ft (2.2m), 15s period, SW swell with cross-offshore winds.
  • Most powerful swell: Tuesday 8 Sep, 6PM (local time) - 10ft (3.0m), 16s period, SW swell with 5,012 kJ wave energy.
  • Next surfable swell (1★+): Friday 4 Sep, 12AM (local time) - 7ft (2.2m), 15s 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 Friday (Sep 04) at 12AM. The primary swell is predicted to be 2.2m and 15s period. 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 3.0m 16s and forecast to arrive on Tuesday (Sep 08) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Monday (Sep 07) at 9AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 4th Sep)7ft (2.2m) 15s
Best Surf12AM (Fri 4th Sep)7ft (2.2m) 15s
Most Powerful 6PM (Tue 8th Sep)10ft (3.0m) 16s

Table - best surf conditions forecast for Trespassers over the next 16 days.


The Lowdown

Alright, let’s talk this out in feet and miles. This is Rusty, and I’m looking at the next sixteen days for Trespassers. This reef break needs a solid SSW swell to fire, and we’ve got a long wait for the good stuff. The first few days are a total loss thanks to onshore winds, so don’t bother paddling out until we get some cleaner windows.

The forecast starts on Wednesday, 2nd September, but it’s a no-go. We’re looking at 5ft of SSW swell with a long 16-second period, but the wind is blowing straight on from the west at 9 mph, and it gets stronger in the afternoon. The combined wave energy is moderate at 959, but the surf is poor. Skip it.

Thursday, 3rd September, is more of the same. The swell bumps up to 7ft from the SW, period drops to 14 seconds, and the wind is a cross-onshore mess from the SW at 12 mph. The energy climbs to 1652, but it’s choppy and ugly. Friday morning, 4th September, shows a little hope with a cross-offshore breeze from the NNE at 9 mph. The swell is 7ft from the SSW, period 16 seconds, and the energy is strong at 2123. The surf is still marginal, but it’s clean. That’s the best of the first week, but it’s not a standout.

The weekend is a washout. Saturday, 5th September, has 8ft of SW swell with onshore winds, and Sunday, 6th September, is cleaner but the swell drops to 5ft. The energy is moderate at 1270, but the wave comment says marginal. Not worth the drive.

The real action starts to build around Monday, 8th September. The morning shows 7ft of SW swell with a very long 17-second period, and the wind is a cross-offshore breeze from the SSE at 19 mph. The energy is strong at 3183, and the surf is clean. This is a decent window, but it’s not the best.

Now, the standout comes on Wednesday, 9th September. We’ve got a solid 12ft of SSW swell, period stretching to 19 seconds – that’s a proper groundswell. The combined energy is massive at 8132, and the wind is a clean cross-offshore from the SSE at 22 mph. The surf is still marginal in the forecast, but the energy and size are undeniable. This is big, powerful, and only for experienced surfers – it’s over 8ft, so beginners stay on the beach. For experts, this is the one to circle on the calendar. The afternoon holds 10ft with similar conditions.

After that, the swell slowly backs off. Thursday, 10th September, has 7ft, and Friday, 11th September, drops to 4ft. The energy is low, but the wind is light and clean. The water temperature is about average for the time of year, nothing unusual to report.

The second week has a few more promising days. Saturday, 12th September, shows 5ft of SW swell with a light cross-offshore breeze, and the surf is expected to be very good. Clean, moderate energy at 1076. The afternoon gets choppy, so hit it early. Monday, 14th September, bumps up to 5ft in the morning and 6ft in the afternoon with a SSW direction and a 17-second period. The wind is clean, and the energy is moderate at 1994. This is a solid session.

The real treat in the second week is Tuesday, 15th September. The morning has 5ft of SW swell, period 16 seconds, and the wind is almost glassy from the SE at 3 mph. The surf is expected to be very good, energy is 993, and it’s clean. Then Wednesday, 16th September, dawns with glassy conditions from the NNE at 3 mph, 4ft of SSW swell, and a very good surf forecast. This is a classic dawny.

Finally, Thursday, 17th September, wraps it up with a bang. The morning has 6ft of SSW swell, a very long 18-second period, energy at 1858, and glassy conditions. The surf is described as excellent for experienced surfers. This is the second standout – clean, long-period groundswell, and the reef should handle it beautifully. Just remember, crowds are possible here, so get there early.

In summary: the first week is mostly a bust, with Friday morning, 4th September, as the only clean option. The big event is Wednesday, 9th September, for experts only. The second week has consistent, clean surf, with Tuesday, 15th September, and Thursday, 17th September, as the true standouts. Keep an eye on the long-range forecasts, but this is looking promising.

Rusty.

Short Range Forecast

Light rain (total 4mm), mostly falling on Fri morning. Very mild (max 15°C on Wed night, min 12°C on Tue night). Winds increasing (light winds from the W on Thu night, fresh winds from the NNW by Fri afternoon).

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Sun night. Very mild (max 16°C on Fri night, min 11°C on Sat night). Winds increasing (light winds from the N on Sun afternoon, strong winds from the ESE by Mon morning).

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
1
4
3
0
0
0
0
3
2
1
1
0
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
15
1.4
SSW
16
1.6
SW
15
1.5
SSW
14
2
SW
14
2.1
SW
14
2.2
SW
15
2.1
SSW
16
1.9
SSW
16
1.5
SSW
15
2.4
SW
14
2.4
SW
15
2.1
SW
15
1.6
SW
14
1.3
SW
14
0.9
SW
13
0.6
SW
13
1.1
SW
14
1.8
SW
19
Wave Graph
Metric surfscale
Energy kJ
537
933
1124
934
1536
1736
2092
2123
1699
1069
2391
2328
1835
1109
648
257
136
464
2300
Wind (km/h)
15
SW
15
W
25
W
30
WNW
20
SW
20
SW
10
NNE
15
NNE
35
NNW
30
WNW
30
WSW
25
WSW
10
WNW
15
NNE
5
N
20
SE
45
ESE
35
E
20
SE
Wind State
cross-on
on
on
on
cross-on
cross-on
cross-off
cross-off
cross-on
on
on
on
on
cross-off
cross
cross-off
off
off
cross-off
High Tide
6:29AM0.02m
3:39PM0.02m
7:24AM0.02m
2:55PM0.02m
1:32PM0.02m
1:17PM0.02m
1:36PM0.02m
1:58PM0.02m
Low Tide
11:05PM-0.00m
11:10AM0.01m
11:12PM-0.00m
11:30AM0.01m
11:26PM-0.00m
11:34PM-0.00m
11:35PM0.00m
11:24PM0.00m
10:57PM0.00m
part cloud
cloud
cloud
rain showers
part cloud
clear
part cloud
light rain
rain showers
clear
cloud
part cloud
part cloud
clear
part cloud
mod rain
light rain
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:37
6:37
6:35
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:01
6:02
6:04
6:04
6:05
6:06
6:06
 mm
1
2
1
8
4
5
Temp °C
14
14
14
15
14
14
14
14
15
16
14
13
13
15
16
15
14
14
14
Feels °C
12
9
8
9
10
11
12
8
10
12
7
8
11
11
15
12
6
7
10
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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