Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 2 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
14.6° 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 9 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 12AM (local time) - 5.5ft (1.7m), 16s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 10 Aug, 9AM (local time) - 10ft (3.0m), 17s period, WSW swell with 4,818 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 12AM (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 Saturday (Aug 15) at 12AM. 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 3.0m 17s and forecast to arrive on Monday (Aug 10) 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 0.1m 5s period and expected on Wednesday (Aug 12) at 12AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 15th Aug)5.5ft (1.7m) 16s
Best Surf12AM (Sat 15th Aug)5.5ft (1.7m) 16s
Most Powerful 9AM (Mon 10th Aug)10ft (3.0m) 17s

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


The Lowdown

Alright, this is Rusty. Let’s have a look at the outlook for Trespassers.

Alright, we’ve got a bit of a rough start here. The first few days are pretty much a write-off with messy conditions. The water temp is sitting at 58°F, which is just about average for this time of year, so nothing out of the ordinary there.

The first week is looking poor. Monday the 10th through Wednesday the 12th is all onshore or cross-onshore wind, gusting over 18 mph, with a big, lumpy sea state. The swell is up there, around 7ft to 10ft, but the wind is just shredding it. The energy is massive (8814), but it’s all for nothing with that wind. Not a single decent wave in that stretch.

Thursday the 13th and Friday the 14th are still a bit average. The swell drops a touch, but it’s still in the 6ft to 7ft range, and we get some gentler winds. It’s only a “marginal” call – the tide might be messing things up or the shape just isn’t there. Still not worth paddling out for.

Now, here’s where it gets interesting. Saturday the 15th is the standout. The wind swings around to a light cross-offshore breeze from the ESE at just 6 mph. The swell is a solid 6ft from the SSW with a nice 16-second period. That’s a long-period groundswell, which at a reef break like Trespassers should line up nicely. The combined energy is a strong 1357. It’s clean, it’s got power, and it’s calling for experienced surfers only – that 6ft with that period will be packing a punch. This is the best session on offer.

Sunday the 16th is still clean with light cross-off winds, but the swell is dropping to 5ft then 4ft. It’ll be fun but not as punchy. Monday the 17th has a little bump of 3ft in the morning with a clean offshore breeze, and by the afternoon it goes glassy with a tiny 2ft. Good for a longboard if you’re keen.

After that, it’s a long dry spell. From Tuesday the 18th right through to Tuesday the 25th, the conditions go downhill. Winds pick up again, mostly strong and cross-off or cross-on, and the swell stays small and messy. There’s a few days with clean conditions, but the swell is too weak and the energy is low (369 to 877). Nothing worth getting excited about.

For the second week, it’s a bust. The end of the forecast window, around the 22nd to 25th, sees some bigger swell return (7ft to 7ft), but it’s accompanied by gale-force winds. The wave energy is high (3237), but you’d need a kite, not a paddle, to do anything with it. The wind is just too strong and onshore.

So, bottom line: if you’re going to paddle out, Saturday the 15th is your day. Clean, solid, groundswell at Trespassers. Get it while it’s good, because the rest of the run is a write-off.

Rusty.

Short Range Forecast

Moderate rain (total 11mm), heaviest on Tue night. Very mild (max 15°C on Tue afternoon, min 11°C on Tue night). Winds increasing (light winds from the NNW on Mon night, fresh winds from the WNW by Tue afternoon).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 15°C on Fri morning, min 12°C on Sat afternoon). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
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
1
0
0
0
0
0
1
1
1
1
2
2
4
4
3
3
3
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3
WSW
17
2.2
SW
16
1.6
SW
16
1.1
SW
14
0.8
SSW
18
2.3
SW
17
2.4
SW
17
2.3
SW
17
2.2
SW
16
2
SSW
16
1.9
SSW
15
1.7
SSW
15
2.1
SSW
17
2
SSW
17
1.7
SSW
16
1.7
SSW
16
1.7
SSW
16
1.5
SSW
15
1.4
SW
14
1.2
SW
14
1
SW
14
Wave Graph
Metric surfscale
Energy kJ
4818
2465
1265
476
408
3148
3439
2912
2320
2032
1634
1332
2517
2204
1536
1356
1322
987
752
589
357
Wind (km/h)
30
SW
25
WSW
15
NNW
30
NNW
35
NNW
35
SW
30
WSW
30
SW
20
WSW
15
WSW
15
WSW
15
W
15
WSW
10
SW
10
SE
10
ESE
10
SE
15
SE
5
SE
10
SSE
15
E
Wind State
cross-on
on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
on
on
on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
High Tide
2:49PM0.02m
3:25AM0.00m
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
Low Tide
11:48PM0.00m
6:22AM0.00m
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
cloud
cloud
part cloud
part cloud
light rain
mod rain
rain showers
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:09
7:07
7:07
7:05
7:05
7:03
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:45
5:46
5:46
5:47
5:49
5:50
5:50
 mm
1
9
1
Temp °C
13
13
13
14
15
12
13
14
14
14
14
14
15
15
14
13
14
13
13
13
12
Feels °C
7
7
9
6
7
6
7
8
9
11
11
11
12
12
11
10
11
8
10
10
9
  • 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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