Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 2 am 14 Sep 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
14.9°C
0.5° 

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


Trespassers surf forecast from 13 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 3PM (local time) - 5.5ft (1.7m), 15s period, SSW swell with offshore winds.
  • Most powerful swell: Tuesday 15 Sep, 9AM (local time) - 6ft (1.8m), 15s period, SW swell with 1,415 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 3PM (local time) - 5.5ft (1.7m), 15s 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 Wednesday (Sep 16) at 3PM. The primary swell is predicted to be 1.7m and 15s 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 1.8m 15s and forecast to arrive on Tuesday (Sep 15) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Tuesday (Sep 15) at 9PM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Wed 16th Sep)5.5ft (1.7m) 15s
Best Surf 3PM (Wed 16th Sep)5.5ft (1.7m) 15s
Most Powerful 9AM (Tue 15th Sep)6ft (1.8m) 15s

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


The Lowdown

Grab your board, it’s a mixed bag out there for the next couple of weeks, but there are a couple of legit windows that’ll make it worth paddling out for. Let’s break it down.

Trespassers (Big Island)
Right off the bat, Monday the 14th is a write-off. It’s messy and weak, with a SW swell around 0.8m and onshore WSW wind at 15 km/h. Not your day. Tuesday the 15th picks up a bit with 1.8m of SW swell, but the S wind keeps it choppy, and the tide doesn’t help—it’s only a so-so session.

Wednesday the 16th is where it starts to feel alive. Still 1.7m of SSW swell, but the ESE wind is offshore and it’s clean. That’s your first real look. The energy is moderate (1238), and the swell period is 15 seconds, so it’s got some push. Thursday the 17th drops back a little, but the glassy afternoon with 0.9m and no wind is worth a sneaky session if you’re free. Friday the 18th and Saturday the 19th are pretty grim again—weak, short-period junk and cross winds kill it.

Now, the big one: Monday the 21st. The afternoon is the standout of the whole run. We’ve got 2.0m of SSW swell at 16 seconds, and it’s absolutely glassy with a 5 km/h WNW breeze. The energy reads 2324—that’s strong, and it’s the kind of clean, powerful, long-period groundswell that’s going to reel down the reef. It’s got excellent conditions for experienced surfers. This is your best bet, no question. But listen: 2.0m with that period is not for beginners. If you’re not confident, watch from the rocks. There’s a downgrade in the morning, but the afternoon is where it’s at.

Sunday the 22nd holds around 1.5m but the wind goes onshore in the afternoon, so it’s a morning window if you’re keen. Monday the 22nd is rocky, Tuesday the 23rd is poor with fresh cross-onshore winds, and the rest of that week stays average—some shoulder-high slop, but nothing to get excited about.

Then we get the finisher. Saturday the 26th morning is clean with 1.6m of SW swell and light E offshore wind, energy at 1221, good conditions. And then Sunday the 27th is the other true standout—1.9m of SSW swell at 20 seconds, that’s long-period and powerful. The energy is huge at 2759, and with a gentle NE cross-offshore breeze and clean skies, it’s excellent for experienced surfers. Break has that long-period push that will really work the reef. Just keep in mind, 20 seconds is getting into that territory where it can bend a bit straight on certain spots, but here it’ll be fine.

Monday the 28th and Tuesday the 29th wind down with less energy and onshore winds, so the tail end of the window is weaker.

Water temp is pretty normal for this time of year, nothing crazy—just your usual tropical warmth, so no need for a thick wetsuit.

Crowds at Trespassers can be a bit of a thing sometimes, especially when the surf is good, so expect some company on the peak during the standout days.

All in all, your two must-do sessions are the 21st afternoon and the 27th. Everything else is either too small, too choppy, or just plain messy. Don’t waste your energy chasing the rest.

Rusty

Short Range Forecast

Mostly dry. Very mild (max 16°C on Mon afternoon, min 9°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Sat night, min 9°C on Thu morning). Winds increasing (calm on Thu afternoon, fresh winds from the WNW by Sat night).

Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
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
1
2
2
2
3
2
2
2
2
0
1
1
0
1
0
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SW
14
1.1
SW
12
1.2
SW
16
1.8
SW
15
1.8
SW
14
1.7
SW
14
1.7
SSW
15
1.7
SSW
15
1.4
SW
15
1.2
SSW
14
0.9
SSW
14
0.8
SSW
13
0.7
SW
14
0.8
SSW
16
0.6
SW
14
0.5
SW
13
1.9
WSW
7
1.2
WSW
10
1.6
SW
11
1.8
SW
15
1.7
SW
14
Wave Graph
Metric surfscale
Energy kJ
231
335
737
1415
1321
1220
1190
1238
930
545
337
229
206
314
167
88
394
264
627
1326
1138
Wind (km/h)
20
WSW
20
WSW
25
S
25
S
25
SSE
20
SE
20
ESE
20
ESE
15
ESE
15
ENE
5
N
15
NE
25
N
15
N
10
NNE
25
N
20
N
35
N
35
WNW
30
SW
10
S
Wind State
cross-on
on
cross
cross
cross-off
cross-off
cross-off
off
cross-off
cross-off
glassy
cross-off
cross
cross
cross-off
cross
cross-off
cross
on
cross-on
cross
High Tide
3:19PM0.02m
5:27AM0.02m
3:22PM0.01m
6:03AM0.02m
3:14PM0.01m
6:41AM0.02m
2:57PM0.01m
7:39AM0.02m
2:18PM0.02m
1:34PM0.02m
1:25PM0.02m
Low Tide
10:30AM0.01m
10:15PM-0.00m
10:59AM0.01m
10:29PM-0.00m
11:23AM0.01m
10:45PM-0.00m
11:38AM0.01m
11:03PM-0.00m
11:26AM0.01m
11:18PM0.00m
11:27PM0.00m
11:15PM0.00m
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:22
6:20
6:20
6:18
6:16
6:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:12
6:12
6:13
6:14
6:14
6:15
6:15
 mm
Temp °C
13
16
15
14
14
10
12
12
10
12
12
15
16
20
21
21
25
26
15
13
13
Feels °C
10
12
11
8
8
5
8
7
6
10
10
11
10
16
17
15
20
20
9
7
11
  • 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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