Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 8 am 25 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 25 Aug 2026:

  • Best quality surf: Thursday 27 Aug, 6PM (local time) - 3.5ft (1.1m), 19s period, SW swell with cross-offshore winds.
  • Most powerful swell: Friday 28 Aug, 12AM (local time) - 6ft (1.8m), 18s period, SW swell with 1,925 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 6AM (local time) - 3.5ft (1.1m), 13s 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 Wednesday (Aug 26) at 6AM. The primary swell is predicted to be 1.1m and 13s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Trespassers in the next 16 days are 1.8m 18s and forecast to arrive on Friday (Aug 28) 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 0.4m 2s period and expected on Saturday (Aug 29) at 6PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Wed 26th Aug)3.5ft (1.1m) 13s
Best Surf 6PM (Thu 27th Aug)3.5ft (1.1m) 19s
Most Powerful12AM (Fri 28th Aug)6ft (1.8m) 18s

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


The Lowdown

Alright folks, Rusty here. Let’s take a look at what’s coming our way for Trespassers over the next couple of weeks. It’s a bit of a slow cooker of a forecast, with some real gems if you’re patient and pick your windows.

The opening of the period is a write-off, I’m afraid. Tuesday the 25th and Wednesday the 26th have some solid groundswell energy (2453), but that’s all for nothing with a brutal cross-shore and cross-onshore wind. It’s lumpy, choppy, and just not worth paddling out for. Things stay poor right through Thursday the 27th, with messy conditions and a persistent cross-shore wind. You’ll be waiting until Friday the 28th for the first real opportunity to get wet.

Friday the 28th is where it finally turns the corner. We’ve got a clean 6ft SSW groundswell (16 second period) with a light cross-offshore breeze in the morning. The combined energy is strong at 1580. It’s an advanced reef break, so the long period will wrap in nicely, but this is punchy and powerful. By the afternoon it goes glassy with 5ft of that same clean swell – that’s the pick of the early run.

Into Saturday the 29th, it’s a bit smaller with clean, offshore winds in the morning at 4ft, and Sunday the 30th is another standout. Sunday afternoon sees an excellent 5ft SSW groundswell, very long period at 19 seconds, with a clean offshore breeze. That is going to be a proper session for the experienced crew, with that long-period energy detonating on the reef. It will be a bit inconsistent between sets, but the quality will be top-notch.

The start of the following week is marginal again. Monday the 31st has 5ft SSW swell with a clean cross-offshore wind, but it’s a bit mixed up. Tuesday September 1st is another day to sit out with fresh cross-shore winds messing it up. We see a return of the glass on Wednesday morning September 2nd, but only a small 2ft SW swell, so it’s a log-friendly morning if you’re keen.

The real highlight of the whole outlook is Friday September 4th through Saturday September 5th. Friday has 5ft to 5ft SW groundswell (16 seconds) with clean cross-offshore wind in the morning, turning glassy by the afternoon. Saturday the 5th is a belter: start with a glassy morning and 5ft, then the afternoon pumps up to a clean 6ft SSW groundswell (16 seconds) under glassy conditions. The energy is strong at 1743. That is the set of the forecast – a true standout for experts. Just remember, with that 6ft and very long period, the reef will be cranking.

The last few days of the outlook fade off into smaller, wind-affected surf. Thursday September 9th shows a final pulse of 7ft SSW groundswell (18 seconds) but with a fresh cross-offshore wind that will keep it clean but powerful. A potential last hurrah for the patient surfer.

Keep an eye on those windows – Trespassers can be fickle, but when it lines up, it’s worth the wait.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 17°C on Thu afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Tue night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 18°C on Sat afternoon, min 11°C on Sat night). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
0
1
0
2
4
4
3
2
2
2
2
2
4
4
2
2
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SSW
16
1.7
SSW
14
1.3
SW
14
1.1
SW
13
1
SW
13
0.7
SW
12
0.9
SW
14
0.9
SW
19
1.8
SW
18
1.7
SW
16
1.5
SW
16
1.2
SW
15
1.1
SW
14
0.9
SW
13
0.8
SW
13
0.7
SSW
20
1.4
SSW
19
1.7
SSW
17
1.5
SSW
16
1.4
SSW
16
1.2
SSW
15
Wave Graph
Metric surfscale
Energy kJ
1650
1142
648
444
331
139
308
546
1925
1580
1115
623
469
257
199
336
1466
1627
1094
945
600
Wind (km/h)
30
SSW
30
SSW
10
SSW
5
NNW
10
NW
15
NNE
20
N
10
N
10
NNE
10
NE
5
ENE
15
ESE
10
ESE
10
SE
15
ESE
15
ESE
10
ESE
15
E
15
NNE
15
N
15
N
Wind State
cross
cross-on
cross-on
cross-on
cross-on
cross-off
cross
cross
cross-off
cross-off
glassy
off
off
cross-off
off
off
off
off
cross-off
cross
cross
High Tide
2:43PM0.02m
3:00AM0.01m
3:00PM0.02m
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
Low Tide
10:36PM0.00m
7:22AM0.00m
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
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:52
6:50
6:48
6:48
6:46
6:45
6:43
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:57
5:58
5:59
5:59
6:00
6:00
6:00
 mm
Temp °C
13
13
13
13
12
13
15
17
17
17
17
17
17
18
14
14
15
13
14
16
18
Feels °C
7
7
10
10
10
10
11
14
14
15
15
14
15
16
11
11
12
10
10
13
13
  • 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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