Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 2 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
14.9°C
0.3° 

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


Trespassers surf forecast from 29 Aug 2026:

  • Best quality surf: Monday 31 Aug, 3PM (local time) - 5ft (1.5m), 18s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Friday 4 Sep, 12AM (local time) - 7ft (2.1m), 17s period, SSW swell with 2,492 kJ wave energy.
  • Next surfable swell (1★+): Sunday 30 Aug, 9AM (local time) - 2.5ft (0.8m), 12s 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 Sunday (Aug 30) at 9AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.4m and 20s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Trespassers in the next 16 days are 2.1m 17s and forecast to arrive on Friday (Sep 04) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Friday (Sep 04) at 6PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sun 30th Aug)2.5ft (0.8m) 12s
Best Surf 3PM (Mon 31st Aug)5ft (1.5m) 18s
Most Powerful12AM (Fri 4th Sep)7ft (2.1m) 17s

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


The Lowdown

Alright, surfers, Rusty here. Let's have a look at what's on the cards for Trespassers over the next couple of weeks.

Right off the bat, we’ve got a bit of a wait on our hands. The good news doesn't kick in until Sunday the 30th, so don't bother paddling out before that. That first swell is a clean little SSW groundswell at 3 ft, with a lovely 12-second period. The wind is a gentle offshore from the east, keeping things smooth. The water’s sitting at 59°, right about where it should be for this time of year. The combined energy is moderate (339). It’s a mellow start, but it’s a start.

Sunday afternoon cleans up even more, with the wave energy picking up to a solid moderate range (514) as the swell drops to 2 ft but the period stretches out to a very long 19 seconds. That’s proper groundswell energy, and with a light offshore breeze, you’ll be getting some clean, long lines.

Now, Monday the 31st is where it starts to get interesting. The morning sees the swell bumping up to a clean 4 ft from the SSW, with a 16-second period. The offshore wind is gone, but it’s a light cross-offshore breeze, so the face will still be tidy. The wave energy jumps into a strong zone (1229). This is a solid option for the experienced crew. The afternoon gets even better for the advanced surfer, with 5 ft of SSW swell at 18 seconds and a very strong energy reading (1551). It’s a bit too much for a beginner, but if you’ve got the skills, Monday afternoon is a standout.

We take a big hit on Tuesday the 1st of September. A strong NNW cross-shore wind at 22 mph just ruins the morning, and the afternoon is a cross-onshore choppy mess. Wednesday and Thursday are no better, with onshore winds and building, lumpy swell. The swell gets up to a messy 7 ft on Thursday afternoon, but with onshore winds, it’s a write-off for a paddle board. With that much wind and swell, it’s looking more like a kite-surfing setup than anything else.

There’s a glimmer on Friday the 4th of September. The morning is still a bit messy with cross-shore wind, but the afternoon swings around to a light cross-offshore breeze from the NNE. The swell is a solid 6 ft from the SSW with a 16-second period, and the wave energy is very strong (1494). For experienced surfers, this is a proper window of excellent surf.

The weekend of the 5th and 6th is a write-off again, with strong cross-onshore winds and lumpy, rain-swept conditions. The swell is there, but the quality is all wrong.

Looking ahead, the outlook improves again. Tuesday the 8th of September has some onshore wind issues, but Wednesday the 9th is a cracker. The morning brings a clear sky, a light cross-offshore breeze from the SSE, and a clean 6 ft SSW groundswell at 16 seconds. The energy is strong (1339), and it’s another excellent session for the advanced surfer.

Thursday the 10th of September is a glassy dream. The afternoon shows zero wind, a glassy surface, and a 4 ft SSW groundswell. The energy is moderate (963), but the conditions are perfect. This is a standout for anyone who loves a clean, calm ocean.

The final highlight is Friday the 11th of September. The morning has a 6 ft SSW groundswell with a very long 19-second period and a strong energy reading (2520). The wind is a clean cross-offshore. The afternoon is just as good, with a 6 ft SW swell at 19 seconds. This is big, powerful, and clean – another one for the experts only.

The weekend of the 12th and 13th holds clean, cross-offshore conditions with moderate 4 ft to 5 ft swell, but the energy drops off a bit. It’s still fun, clean surf, but not the standout events of the week prior. After that, we drop back into poor conditions from Monday the 14th, with strong onshore winds and rain.

All in all, the absolute best on offer is the glassy afternoon of Thursday the 10th of September, and the powerful, clean swell of Friday the 11th of September. Keep your eyes on those dates.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Tue afternoon, min 13°C on Sun morning). Winds increasing (light winds from the ESE on Sun afternoon, fresh winds from the NNW by Tue morning).

Days 4-6 Weather Summary

Heavy rain (total 23mm), heaviest during Fri night. Very mild (max 15°C on Wed night, min 13°C on Wed morning). Winds increasing (calm on Thu night, fresh winds from the NNW by Fri morning).

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
3
3
4
2
0
0
0
0
0
0
0
1
4
1
4
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
12
0.7
SSW
19
1.3
SSW
17
1.3
SSW
16
1.5
SSW
18
1.4
SSW
16
1.1
SW
16
0.7
SW
18
1.4
SW
15
1.4
SSW
16
1.8
SW
14
2
SW
14
1.8
SW
14
2
WSW
13
2.1
SSW
17
2
SSW
16
1.7
SSW
16
1.5
SSW
15
1.8
SW
15
2.2
SW
15
1.5
SW
14
Wave Graph
Metric surfscale
Energy kJ
190
312
911
749
1399
957
551
316
906
921
1402
1528
1135
1326
2492
1982
1441
1028
1511
2179
915
Wind (km/h)
15
E
10
ESE
15
E
15
NE
15
NNE
20
NNE
35
NNW
20
WNW
25
WSW
20
W
25
WNW
30
WNW
25
W
20
WSW
15
NNE
30
N
15
NNE
30
NNW
35
SW
35
SW
15
SW
Wind State
off
off
off
cross-off
cross-off
cross-off
cross
cross-on
cross-on
on
on
on
on
on
cross-off
cross
cross-off
cross-on
cross-on
cross-on
cross-on
High Tide
3:48PM0.02m
5:14AM0.01m
3:54PM0.02m
5:49AM0.02m
3:49PM0.02m
6:29AM0.02m
3:39PM0.02m
7:24AM0.02m
2:55PM0.02m
1:32PM0.02m
1:17PM0.02m
Low Tide
9:35AM0.01m
10:44PM0.00m
10:11AM0.01m
10:54PM-0.00m
10:42AM0.01m
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
clear
clear
clear
clear
clear
clear
cloud
part cloud
part cloud
cloud
cloud
part cloud
rain showers
part cloud
part cloud
light rain
mod rain
heavy rain
rain showers
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:43
6:41
6:41
6:39
6:37
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:01
6:02
6:04
6:04
6:05
 mm
1
2
6
14
1
Temp °C
15
16
14
16
17
18
17
19
14
13
14
15
15
14
14
15
14
15
14
13
12
Feels °C
12
13
11
13
13
14
11
15
10
8
8
11
11
10
13
10
12
13
7
5
7
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Trespassers:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Trespassers surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest