Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 2 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
14.7° C
0.0° 

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


Trespassers surf forecast from 11 Aug 2026:

  • Best quality surf: Friday 14 Aug, 9PM (local time) - 5.5ft (1.7m), 16s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 12 Aug, 9AM (local time) - 7.5ft (2.3m), 17s period, SW swell with 3,052 kJ wave energy.
  • Next surfable swell (1★+): Friday 14 Aug, 9PM (local time) - 5.5ft (1.7m), 16s 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 Friday (Aug 14) at 9PM. The primary swell is predicted to be 1.7m and 16s period. 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 2.3m 17s and forecast to arrive on Wednesday (Aug 12) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Saturday (Aug 15) at 12PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 14th Aug)5.5ft (1.7m) 16s
Best Surf 9PM (Fri 14th Aug)5.5ft (1.7m) 16s
Most Powerful 9AM (Wed 12th Aug)7.5ft (2.3m) 17s

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


The Lowdown

Alright, Rusty here, let’s talk about what’s on offer at Trespassers.

First up, the water temp is sitting right on 59°F, which is bang on normal for the time of year, so no surprises there.

The outlook starts off rough. Tuesday the 11th and Wednesday the 12th are a write-off. We’re looking at fresh cross-onshore winds, lumpy, choppy conditions, and the wave comment is calling it poor. The combined energy is moderate on Tuesday (778), but it jumps to very strong on Wednesday morning (4251) – that’s a lot of power, but with the wind state being “fresh cross-onshore and lumpy,” it’s just not rideable. The swell is 8ft from the SW with a 17-second period, which is a long-period groundswell, but it’s being wasted.

Thursday the 13th and Friday the 14th are still marginal. The swell is dropping from 7ft down to 6ft, wind is lighter, but it’s still cross-onshore, keeping things fairly choppy or with wind ripples.

Now, here’s where it gets interesting. Saturday the 15th is the first real standout. The wind swings to a gentle cross-offshore breeze from the ESE, and the wave comment says “expect very good surf conditions.” The swell is 5ft from the SSW with a 16-second period – that’s nice, long-period groundswell. The energy is moderate (1273). This is clean, and Trespassers is a reef break, so that long-period swell will line up nicely. It’s an advanced wave, so not for the groms, but for the experienced crew, this is the session to pencil in. The optimum swell direction is SSW, and that’s exactly what we’ve got.

Sunday the 16th and Monday the 17th look good too. Sunday morning has a light offshore wind from the E, clean conditions, with 4ft SW swell (14-second period). Monday morning is even cleaner with a light E offshore and a 3ft SW swell. The energy is lower (462), but the conditions are clean.

Tuesday the 18th through to the 22nd is a mixed bag. The wind turns more cross-off or cross, but the swell stays small, mostly under 4ft. The wave comments are mostly “marginal” or “poor.” Worth a look if you’re desperate, but nothing special.

The best of the entire forecast, though, is Friday the 21st afternoon. The wind drops to a slight air, almost glassy, with a light cross-offshore from the NNE. The swell is 5ft from the SW, 16-second period, and the wave comment says “expect very good surf conditions.” The energy is moderate (1103). This is about as good as it gets for Trespassers in this window. Clean, long-period groundswell, and the reef will handle it perfectly.

The last few days, from the 22nd to the 26th, drop off again. The wind picks up, the swell gets small or messy, and the wave comments are poor. The 26th morning shows a 7ft SW swell but with a short 10-second period and cross-onshore winds – that’s just a windy, choppy mess.

To sum it up: the first few days are a bust. Then Saturday the 15th and Friday the 21st are your best bets, with Friday the 21st afternoon being the absolute standout. Get on it.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Tue night. Very mild (max 15°C on Tue afternoon, min 13°C on Tue morning). Winds decreasing (strong winds from the SW on Tue night, light winds from the SW by Thu night).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 14°C on Fri morning, min 11°C on Sun morning). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
0
0
0
0
1
2
1
2
2
2
4
3
3
3
2
1
2
2
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
SW
14
0.8
SSW
18
2.2
SW
17
2.3
SW
17
2.3
SW
17
2.2
SW
16
2
SSW
16
1.9
SSW
15
1.9
SSW
15
2
SSW
16
1.8
SSW
16
1.7
SSW
16
1.6
SSW
16
1.5
SSW
16
1.3
SSW
15
1.2
SW
14
1.2
SSW
14
1.1
SW
14
0.9
SW
13
1.1
SW
16
1.1
SW
15
Wave Graph
Metric surfscale
Energy kJ
736
408
2726
3052
2912
2349
2007
1613
1634
2077
1756
1536
1273
1112
720
614
553
463
261
587
496
Wind (km/h)
30
NNW
30
NNW
40
SW
30
WSW
25
WSW
20
WSW
15
WSW
20
WSW
15
W
10
SSW
15
SW
10
SE
15
ESE
15
ESE
15
ESE
10
E
15
SE
15
ESE
10
E
15
ENE
20
ENE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
cross-off
cross-off
cross-off
off
off
cross-off
off
off
cross-off
off
High Tide
3:12PM0.02m
3:21AM0.00m
3:33PM0.02m
3:39AM0.01m
3:46PM0.02m
4:07AM0.01m
3:58PM0.02m
4:36AM0.01m
4:09PM0.02m
5:16AM0.01m
4:06PM0.02m
5:56AM0.01m
4:06PM0.02m
Low Tide
11:30PM0.00m
7:28AM0.00m
11:17PM0.00m
8:17AM0.00m
11:09PM0.00m
8:54AM0.00m
11:01PM0.00m
9:35AM0.01m
11:05PM0.00m
10:09AM0.01m
11:10PM0.00m
10:39AM0.01m
11:20PM-0.00m
part cloud
part cloud
light rain
part cloud
rain showers
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
part cloud
cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:07
7:07
7:05
7:05
7:03
7:01
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:46
5:46
5:47
5:49
5:50
5:50
5:51
 mm
2
1
Temp °C
14
15
14
13
14
14
14
14
15
14
14
13
12
13
12
12
12
12
15
17
16
Feels °C
7
9
8
6
8
10
11
10
12
11
10
10
8
9
7
8
7
8
12
13
11
  • 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