Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 8 am 27 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 27 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 0.3m 2s 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

G’day, Rusty here. Let’s talk about Trespassers – this reef setup is going to see a bit of a mixed bag over the next couple of weeks. The water temp is sitting at 59°F, which is about average for this time of year, so nothing unusual there.

The week starts off pretty quiet. Thursday the 27th is a write-off – poor surf conditions with a tiny 3ft SW swell and a cross-shore wind that’s just messy. Not worth paddling out. Friday the 28th is where things start to look up. The morning brings a solid 6ft SW swell with a long 16-second period, and a light cross-off breeze from the ENE keeps it clean. The combined energy is strong (1580), and the faces will have some real push. This is the standout session for the week – excellent for experienced surfers. The afternoon holds up too, with 5ft SW swell going glassy offshore from the east, energy still strong (1115). Saturday the 29th is smaller but still fun: 4ft in the morning with offshore east wind, clean, and a moderate energy of 469. The afternoon goes glassy with a 3ft SSW swell – perfect for a lazy session. Sunday the 30th is tiny but clean, with 2ft to 2ft SSW swell and glassy conditions – light on the energy (443–511) but still a nice paddle.

Monday the 31st brings a solid pulse: 4ft SSW swell in the morning, 15-second period, and a cross-off breeze keeping it clean. Energy jumps to 1223. The afternoon sees 5ft SSW swell with a very long 18-second period (energy 1551), though the wind goes cross-shore, so there’s a bit of texture. Still worth a look.

Then we hit a rough patch. From Tuesday the 1st of September through to Saturday the 5th, conditions turn poor. Winds are strong onshore or cross-shore, and the swell is messy. The 3rd of September sees a big 6–6ft SW swell, but it’s pinned by onshore wind – total washout. Sunday the 6th delivers a huge 10ft SW swell with a long 14–16 second period, and the morning is clean with a light cross-off breeze. That’s huge energy (3232–4218) – easily the biggest swell of the outlook. But at 10ft, this is only for experts. The afternoon gets some rain and a moderate cross-off, making it a bit more marginal. This is the standout for the second week, but it’s a heavy, powerful swell – not for the faint-hearted.

After that, the wind turns bad again. Monday the 7th through to Wednesday the 9th is all cross-onshore or onshore, with swell holding around 7–10ft and energy through the roof (2000–3558), but the onshore wind makes it choppy and messy. Thursday the 10th and Friday the 11th finally see a return to cross-shore winds, with 6–7ft SW swell and decent energy (1636–2157), but it’s still pretty bumpy.

So, the pick of the whole window is Friday the 28th morning – that 6ft SW groundswell with clean offshore winds is the best you’ll get. Second best is Sunday the 6th morning for the big-swell hunters, but only if you’re experienced. For the rest, pick your windows carefully.

Rusty

Short Range Forecast

Mostly dry. Very mild (max 18°C on Fri morning, min 13°C on Thu morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Tue afternoon, min 12°C on Tue night). Winds increasing (calm on Sun afternoon, fresh winds from the NNW by Tue morning).

Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
2
4
4
3
2
2
2
2
2
2
3
3
3
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SW
14
0.9
SW
19
1.7
SW
18
1.7
SW
16
1.5
SW
16
1.2
SW
15
1.1
SW
14
0.9
SW
13
0.9
SW
13
0.6
SSW
20
0.7
SSW
19
1.3
SSW
17
1.3
SSW
15
1.5
SSW
18
1.4
SSW
16
1.2
SSW
16
0.9
SSW
14
1.2
SW
15
1.4
SSW
15
1.3
SSW
14
1.6
SW
14
Wave Graph
Metric surfscale
Energy kJ
308
546
1761
1580
1115
623
469
257
241
253
315
911
791
1399
969
657
330
666
840
626
904
Wind (km/h)
20
N
15
N
10
NE
10
ENE
5
E
10
E
10
E
5
SSE
10
ESE
10
E
0
S
10
ESE
15
NNE
10
N
25
N
35
NNW
30
WNW
20
SW
20
WSW
25
W
25
WNW
Wind State
cross
cross
cross-off
cross-off
off
off
off
glassy
off
off
glassy
off
cross-off
cross
cross
cross
on
cross-on
on
on
on
High Tide
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
6:29AM0.02m
3:39PM0.02m
Low Tide
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
11:10AM0.01m
11:12PM-0.00m
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
cloud
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
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
6:02
 mm
Temp °C
14
17
17
18
18
17
17
17
17
16
17
16
16
17
18
17
19
14
13
12
13
Feels °C
10
15
15
16
16
13
15
16
14
14
16
14
14
14
13
11
13
11
8
6
8
  • 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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