Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 8 pm 22 Aug 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
14.8°C
0.2° 

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


Trespassers surf forecast from 22 Aug 2026:

  • Best quality surf: Sunday 23 Aug, 12AM (local time) - 5ft (1.6m), 15s period, SW swell with glassy winds.
  • Most powerful swell: Thursday 27 Aug, 6PM (local time) - 6ft (1.9m), 19s period, SW swell with 2,639 kJ wave energy.
  • Next surfable swell (1★+): Sunday 23 Aug, 12AM (local time) - 5ft (1.6m), 15s 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 Sunday (Aug 23) at 12AM. The primary swell is predicted to be 1.6m and 15s period with a secondary swell of 0.7m and 19s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Trespassers in the next 16 days are 1.9m 19s and forecast to arrive on Thursday (Aug 27) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Monday (Aug 24) at 3PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 23rd Aug)5ft (1.6m) 15s
Best Surf12AM (Sun 23rd Aug)5ft (1.6m) 15s
Most Powerful 6PM (Thu 27th Aug)6ft (1.9m) 19s

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


The Lowdown

Alright folks, Rusty here. Let’s talk about the waves on the way at Trespassers – the only show in town for this forecast period. This is an advanced reef break, so we’re not messing around with learner waves. The water temp is sitting about average for this time of year, so nothing wild there.

We’ve got a solid run of surf starting this Sunday the 23rd. The early call is for a clean 5 ft SW groundswell with a very long 17-second period. That’s proper groundswell energy, and the combined energy reading is strong at 1433. This kind of long-period swell can stand up and pitch nicely on a reef like Trespassers. With a light cross-offshore breeze, this is the standout session – excellent for experienced surfers. The afternoon drops a touch to 5 ft but stays clean.

Monday the 24th sees the swell ease back to 3 ft in the morning with moderate energy (312). The wind is cross-off, so it’s still clean but much smaller. By afternoon, the wind goes offshore but the swell is down to 2 ft – rideable but nothing to get excited about.

Tuesday the 25th is a write-off. The swell bumps up to 6 ft in the morning but the wind is howling from the SSW at 15 mph, making it a messy cross-shore chop. Afternoon gets worse with a cross-onshore wind and a 5 ft swell that’s just poor. Combined energy is high (2301 and 1384), but the quality is rubbish.

Wednesday the 26th is a nothing day – small 4 ft swell and light cross-onshore winds. Thursday the 27th gets interesting again though. The morning is small at 2 ft but with a very long 21-second period – that’s a tease, really. The afternoon pumps up to 5 ft with a 20-second period and a combined energy of 1813. The wind is light cross-shore, so it’s marginal but has serious potential if the sets line up.

Friday the 28th is another standout. Morning brings 6 ft SW groundswell at 17 seconds, combined energy at 1713, and a light cross-offshore breeze. Clean, powerful, and for the experienced crew only. Afternoon stays clean with 5 ft and offshore wind – very good surf.

Saturday the 29th is smaller again, 4 ft in the morning and clean, but nothing special. Sunday the 30th has a glassy afternoon session with 4 ft SSW swell and a 16-second period – the combined energy is 1152 and with glassy conditions, that’s a beautiful window if you’re after clean lines.

Monday the 31st has a 6 ft SSW swell in the morning but with cross-shore wind, it’s marginal. Afternoon is similar. From Tuesday the 1st of September onward, things turn ugly. Strong onshore winds and choppy conditions dominate right through to Monday the 7th. There’s a spike of 8 ft on the 7th but with a strong cross-onshore wind, it’s just a big mess – not worth it.

So the two real standouts are Sunday morning the 23rd with that long-period 5 ft SW groundswell and clean conditions, and Friday the 28th with 6 ft of clean, offshore groomed swell. Those are the sessions to circle on the calendar. The rest is either small, windy, or both. Trespassers is fairly consistent, so the gaps aren’t huge, but the second week looks bleak.

Stay on it,
Rusty

Short Range Forecast

Moderate rain (total 17mm), heaviest on Mon morning. Very mild (max 16°C on Sun night, min 12°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Thu afternoon, min 12°C on Wed afternoon). Wind will be generally light.

Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
4
3
1
2
1
0
1
0
0
0
1
1
1
3
4
4
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
15
1.6
SW
17
1.4
SW
16
1.1
SW
15
0.9
SW
14
0.7
SW
14
0.8
SSW
13
1.7
SSW
16
1.6
SW
15
1.2
SW
14
1.1
SW
13
1.1
SW
13
0.7
SW
12
0.9
SW
14
1.4
SW
20
2
SW
18
1.8
SW
17
1.6
SW
16
1.3
SW
15
Wave Graph
Metric surfscale
Energy kJ
1045
1433
1018
496
297
194
219
1498
1045
589
437
369
139
368
1379
2402
1713
1317
695
Wind (km/h)
5
ESE
15
NNE
10
NNE
15
ENE
15
ENE
20
E
15
SSW
25
SSW
25
SW
10
SW
10
NW
15
NNW
15
NNE
20
N
10
N
15
NE
10
NNE
5
ENE
10
ESE
Wind State
glassy
cross-off
cross-off
cross-off
cross-off
off
cross-on
cross
cross-on
cross-on
cross-on
cross
cross-off
cross
cross
cross-off
cross-off
off
off
High Tide
2:21PM0.02m
2:29PM0.02m
2:56AM0.01m
2:43PM0.02m
3:00AM0.01m
3:00PM0.02m
3:20AM0.01m
3:14PM0.02m
3:45AM0.01m
3:26PM0.02m
Low Tide
00:18AM0.00m
11:45PM0.00m
11:01PM0.00m
6:33AM0.00m
10:36PM0.00m
7:22AM0.00m
10:26PM0.00m
8:00AM0.00m
10:24PM0.00m
8:29AM0.00m
10:29PM0.00m
clear
clear
part cloud
light rain
heavy rain
light rain
part cloud
cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:52
6:50
6:48
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:55
5:55
5:57
5:58
5:59
5:59
 mm
2
11
4
Temp °C
13
14
15
16
12
12
13
14
13
13
13
12
13
15
17
17
17
17
17
Feels °C
11
11
13
13
10
9
10
9
8
10
11
9
10
11
14
14
15
15
14
  • 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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