Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 8 pm 26 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 26 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 9PM (local time) - 5ft (1.6m), 18s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 28 Aug, 3AM (local time) - 6ft (1.8m), 17s period, SW swell with 1,882 kJ wave energy.
  • Next surfable swell (1★+): Thursday 27 Aug, 6PM (local time) - 3.5ft (1.1m), 19s 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 Thursday (Aug 27) at 6PM. The primary swell is predicted to be 1.1m and 19s period with a secondary swell of 1.0m and 14s. 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 1.8m 17s and forecast to arrive on Friday (Aug 28) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Monday (Aug 31) at 12PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Thu 27th Aug)3.5ft (1.1m) 19s
Best Surf 9PM (Thu 27th Aug)5ft (1.6m) 18s
Most Powerful 3AM (Fri 28th Aug)6ft (1.8m) 17s

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


The Lowdown

Alright folks, Rusty here. Let’s talk about what’s coming up for Trespassers. This is a serious reef break, advanced territory only, and we’ve got a solid 16-day window to look at.

Right now, the surf is a bit of a write-off. We’ve got some small, messy waves on Thursday the 27th with a moderate cross-shore wind, so don’t get your hopes up. The real action starts to build from Friday the 28th. That morning, we’re looking at a clean 6ft SSW swell with a 16-second period, light cross-offshore wind, and the combined energy is pumping at 1580 (moderate wave energy). It’s a good one for experienced surfers, but it’s not the standout.

The absolute pick of the window, the one you want to circle on your calendar, is Monday the 31st of August. The morning session is looking prime. We’ve got a solid 5ft SSW groundswell, a long 19-second period, and light cross-offshore wind keeping it clean. The combined energy is a strong 1773, and the description says “excellent surf conditions for experienced surfers.” The offshore wind is from the ESE, which works well for this spot’s optimum direction, and with the swell coming from the SSW, it’s going to wrap in nicely. The water temperature feels about average for this time of year, nothing unusual. Crowds are sometimes a thing here, so you might have a few others in the lineup, but it’ll be worth it.

Now, after that, we hit a rough patch. Tuesday the 1st of September blows up with a fresh cross-shore wind, and the quality drops right off. From Wednesday the 2nd through to the 6th of September, it’s a messy mix of onshore winds and building swell. Saturday the 5th has some light rain and a bumpy 6ft swell, but it’s not clean. Sunday the 6th is a write-off – huge 10ft SW swell, but with a fresh cross-onshore wind, it’s just a lumpy, choppy mess. That setup is more interesting for kite surfers than paddle surfers.

But hold on, because the second week has a couple of real gems. The first is Monday the 7th of September. During the morning, we’ll see a 8ft SW groundswell with a 16-second period, and the wind goes glassy – that’s zero wind. The combined energy is a massive 3103 (strong wave energy), and it’s clean. That’s expert territory, but for the right crew, it’s a dream.

The true standout, though, is Tuesday the 8th of September. This is the one. The morning offers an 12ft SW swell with a 16-second period, light cross-offshore wind, and a combined energy of 5418 (very strong wave energy). The afternoon is even better: glassy conditions, same 12ft, a 17-second period, and energy at 6035. Both sessions are rated as “excellent for experienced surfers.” This is big, powerful, clean groundswell. For a reef break like Trespassers, that’s as good as it gets. The direction is spot on.

After that, the wind picks up again on the 9th and 10th, but Thursday the 10th of September afternoon has a clean 6ft SW swell with a 15-second period, light offshore wind, and energy at 2164 – not a bad little session to end the run.

So, to sum it up: the first week’s best is Monday the 31st of August morning. The overall champion, the one you should plan for, is Tuesday the 8th of September. That’s a long-range call, so it’s a bit less certain, but if it holds, it’ll be special.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Fri morning, min 12°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 21°C on Tue afternoon, min 13°C on Sat night). Winds increasing (light winds from the ESE on Sun afternoon, fresh winds from the N by Tue morning).

Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
4
4
3
2
2
2
2
2
2
3
4
3
1
0
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SW
12
0.9
SW
14
0.9
SW
19
1.7
SW
18
1.7
SW
16
1.5
SW
16
1.2
SW
15
1
SW
14
0.9
SW
13
0.8
SSW
13
0.5
SSW
20
0.7
SSW
19
1.3
SSW
17
1.5
SSW
19
1.5
SSW
18
1.4
SW
16
1.2
SSW
16
0.9
SW
15
1.2
SSW
15
Wave Graph
Metric surfscale
Energy kJ
114
268
546
1761
1580
1115
623
401
257
212
216
309
890
1559
1399
1031
657
319
632
Wind (km/h)
10
NE
20
N
15
N
10
NE
10
NNE
10
ENE
15
ENE
10
E
5
ESE
15
ESE
15
ESE
5
ESE
10
E
15
NNE
15
N
20
N
30
N
25
N
20
W
Wind State
cross-off
cross
cross
cross-off
cross-off
cross-off
off
off
glassy
cross-off
off
off
off
cross-off
cross
cross
cross
cross
on
High Tide
3:20AM0.01m
3:14PM0.02m
3:45AM0.01m
3:26PM0.02m
4:13AM0.01m
3:34PM0.02m
4:39AM0.01m
3:48PM0.02m
5:14AM0.01m
3:54PM0.02m
5:49AM0.02m
3:49PM0.02m
Low Tide
10:26PM0.00m
8:00AM0.00m
10:24PM0.00m
8:29AM0.00m
10:29PM0.00m
9:06AM0.01m
10:35PM0.00m
9:35AM0.01m
10:44PM0.00m
10:11AM0.01m
10:54PM-0.00m
10:42AM0.01m
11:05PM-0.00m
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:48
6:46
6:45
6:43
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:59
5:59
6:00
6:00
6:00
6:01
 mm
Temp °C
12
15
17
17
18
18
18
17
18
16
16
17
14
15
18
19
18
21
20
Feels °C
9
11
14
14
16
16
15
15
17
13
14
16
11
11
14
14
11
16
16
  • 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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