Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 2 am 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
14.5°C
0.1° 

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


Trespassers surf forecast from 28 Aug 2026:

  • Best quality surf: Monday 31 Aug, 12PM (local time) - 5ft (1.5m), 18s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Saturday 5 Sep, 3AM (local time) - 8ft (2.5m), 15s period, SW swell with 2,959 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 9AM (local time) - 3.5ft (1.1m), 14s 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 Saturday (Aug 29) at 9AM. The primary swell is predicted to be 1.1m and 14s 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 2.5m 15s and forecast to arrive on Saturday (Sep 05) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Aug 30) at 12AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sat 29th Aug)3.5ft (1.1m) 14s
Best Surf12PM (Mon 31st Aug)5ft (1.5m) 18s
Most Powerful 3AM (Sat 5th Sep)8ft (2.5m) 15s

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


The Lowdown

Alright, grabbing the board for a look at the 16-day forecast. It's a one-break show here, and it's a real rollercoaster.

Water temps are sitting at 58°F, pretty much normal for the time of year.

We start off this Saturday, August 29th, with a clean 4ft swell from the SW, with a nice 14-second period. The wind is a gentle offshore from the ESE, so the waves will be glassy and clean. The combined energy is moderate (469), so it's a fun, manageable size. Saturday afternoon stays clean, dropping to 3ft.

Sunday the 30th keeps the clean, offshore winds. Morning swell is 3ft from the SSW, but the afternoon is the real oddball. The period jumps to 19 seconds, a proper long-period groundswell, but the height is only 2ft. That long period will give it some serious grunt and shape, but with long waits between sets. It's a reef break, so it'll handle that long period better than a beach.

The absolute standout is Monday, August 31st. The morning is clean, with a 4ft SSW swell, 16-second period, and a light cross-offshore breeze. The combined energy is a strong 1229. Then Monday afternoon is the peak of the whole forecast. We're talking a clean 5ft, 18-second, SSW swell with light offshore winds. The energy is screaming at 1551. The waves will be powerful, well-shaped, and clean. This is for experienced surfers – the size and period are serious. No crowds mentioned, so you could have it to yourself.

But then the wheels fall off. From Tuesday, September 1st, through the end of the second week, the wind goes onshore, cross-shore, or just blows a gale. There are a few days where the swell size is still solid (5ft to 8ft+), but the wind is howling. From September 5th to 7th, we have near-gale onshore winds and massive swell energy (over 4000). That’s a total blown-out, dangerous mess. For a reef, that's a washing machine. Kite surfers might find those strong cross-onshore days with big lumps (like 8ft on the 5th) more interesting than paddle surfers.

From September 8th to 12th, conditions improve slightly, but the wave comments are all “marginal” due to wind chop. The swell stays around 5ft to 6ft, which is good size, but the wind is mostly cross-shore. By the 10th, we get a clean morning with a 6ft SSW swell and light winds, which is a glimmer of hope, but it's a long way out. The 13th of September rolls back into poor conditions with fresh cross-shore winds.

The second week is a real gamble. The 10th of September morning looks promising, but it's a week and a half away. The rest is a struggle with lumpy, cross-shore chop.

So, here's the call: Monday, August 31st is your day. The Saturday and Sunday before are clean, fun sessions, but Monday is the standout. After that, it's a long, frustrating stretch of wind-affected, poor-quality surf, with only a few marginal windows. It's a classic short, sharp window of greatness, then a long wait.

Rusty

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 20°C on Tue afternoon, min 13°C on Tue night). Winds decreasing (fresh winds from the N on Tue morning, light winds from the NW by Thu night).

Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
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
1
2
2
3
3
4
2
0
0
0
0
0
0
0
0
1
1
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)
1.1
SW
14
0.9
SW
13
0.8
SW
13
0.8
SSW
12
0.7
SSW
19
1.3
SSW
17
1.3
SSW
16
1.5
SSW
18
1.4
SSW
16
1.2
SSW
16
0.7
SW
17
1.5
SW
15
1.1
SW
15
1.4
SSW
15
1.8
SW
14
1.7
SW
14
1.7
SW
14
1.6
SW
14
1.5
SW
14
1.4
SW
14
2.2
SW
15
Wave Graph
Metric surfscale
Energy kJ
469
257
199
190
312
1044
749
1399
957
649
305
975
530
840
1273
1147
1067
872
902
752
2111
Wind (km/h)
15
ESE
15
ESE
15
ESE
15
ESE
10
ESE
15
ESE
15
NE
10
N
20
NNE
30
N
25
NNW
30
SW
20
W
20
W
25
W
20
WNW
20
WNW
15
N
35
NNE
15
NNW
40
WNW
Wind State
off
off
cross-off
off
off
off
cross-off
cross-off
cross-off
cross
cross
cross-on
on
on
on
cross-on
on
cross
cross-off
cross-on
on
High Tide
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
7:24AM0.02m
2:55PM0.02m
1:32PM0.02m
Low Tide
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
11:30AM0.01m
11:26PM-0.00m
11:34PM-0.00m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
part cloud
light rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:46
6:45
6:43
6:41
6:41
6:39
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:00
6:00
6:00
6:01
6:02
6:04
6:04
 mm
1
1
2
Temp °C
17
17
15
15
16
14
15
16
18
17
20
15
13
14
14
14
16
15
17
17
15
Feels °C
14
14
12
13
13
10
12
13
14
10
15
12
9
9
9
10
12
13
11
15
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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