Trespassers Surf Break

Lat Long: 35.13° S 136.94° E

Trespassers Surf Forecast and Surf Report

Issued: 2 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Trespassers sea temperature is
15.0°C
0.4° 

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


Trespassers surf forecast from 7 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 9AM (local time) - 5ft (1.5m), 17s period, SSW swell with offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 9AM (local time) - 7ft (2.1m), 19s period, SSW swell with 3,001 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 9AM (local time) - 5ft (1.5m), 17s 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 Tuesday (Sep 08) at 9AM. The primary swell is predicted to be 1.5m and 17s 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 2.1m 19s and forecast to arrive on Wednesday (Sep 09) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Sep 09) at 6AM.

Wave TypeTime (ACST) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 8th Sep)5ft (1.5m) 17s
Best Surf 9AM (Tue 8th Sep)5ft (1.5m) 17s
Most Powerful 9AM (Wed 9th Sep)7ft (2.1m) 19s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it. We’ve got a bit of a waiting game on our hands, but the second half of this forecast window is looking like it could be something special for the experienced crew.

The first real swell action kicks off Tuesday morning, the 8th of September. We’re looking at a solid 5ft SSW groundswell pushing in with a very long 17-second period. The water temp is sitting at 59°, which is about average for this time of year. The wave energy is strong here, clocking in at (1352). The wind is light and offshore from the ENE, so the conditions are going to be clean. This is a standout session for the early part of the week, but make no mistake, this is for advanced surfers only at Trespassers. The wave quality is going to be excellent, but it’s a reef break and it’s fairly consistent, so expect some power. The crowd situation is a possibility, but with that swell size and the difficulty, it might keep the numbers down.

Tuesday afternoon sees the wind swing to a cross-onshore, and the quality drops right off. That’s a write-off.

Wednesday the 9th brings a bigger pulse, with swell hitting 7ft to 7ft from the SSW with a 19-second period. The energy is cranking (3001). However, the wind is a stiff 19 mph cross-offshore from the SE. It’s clean, but that’s a lot of juice. This is expert territory, and for the average surfer, it’s going to be a handful. The conditions are marginal, so it’s a pick-and-choose day.

Thursday the 10th is a real highlight. The swell drops back to a manageable 6ft in the morning, still from the SSW with a 16-second period. The wind is offshore from the E at 16 mph, giving us clean, lined-up waves. The energy is strong (1713). This is a top-tier morning for experienced surfers. The afternoon holds up nicely too, with the swell easing to 5ft and the wind staying offshore, making it a very good session.

Friday the 11th is a great day for the punters. The swell drops to 4ft to 4ft, the period is still a solid 16 seconds, and the wind is light and offshore or glassy. The energy is moderate (576-749). The conditions are clean, and the surf is good. This is a fun, accessible day for a wider range of surfers.

Saturday the 12th is a bit mixed. The swell is small at 4ft to 4ft, and while the wind is cross-offshore, the quality is on the fence. The morning is questionable, but the afternoon looks better.

From Sunday the 13th through to Monday the 21st of September, we hit a real lull. The swell drops to under 3ft, and the wind is mostly onshore or cross-onshore, making for poor conditions. That’s a long stretch of flat and messy days.

Then, we get a resurgence. Tuesday the 15th sees a small bump of 4ft to 4ft with offshore wind. It’s not huge, but it’s a sign of life.

Wednesday the 16th is a good step up. We’ve got 5ft SSW swell, a 16-second period, and gentle offshore wind. The energy is moderate (1057). It’s very clean, and it’s a good session for the experienced surfer who’s been waiting.

The real standout for the second week is Monday the 21st of September. The swell jumps to 7ft in the morning and 7ft in the afternoon, both from the SSW with a 17-second period. The wind is light and cross-offshore from the NNE. The energy is strong (2667-2404). This is a quality, powerful swell. It’s expert-only territory, but if you’ve got the skills, this is the best session on offer in the whole outlook. The wave quality is excellent, the conditions are clean, and the long-period groundswell will be hitting the reef at Trespassers beautifully. Just be aware that with a period that long, the sets will be widely spaced.

The rest of the period after that Monday gets messy again with strong onshore winds. So, bottom line: this week has a couple of solid windows, with Thursday the 10th and Friday the 11th being the best for the average good surfer, while Monday the 21st of September is the one for the hardcore crew.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 13°C on Tue morning, min 10°C on Tue night). Winds increasing (light winds from the ENE on Tue morning, fresh winds from the SSE by Tue night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 20°C on Sat night, min 12°C on Fri morning). Winds increasing (calm on Fri morning, fresh winds from the N by Sat night).

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
0
2
2
2
3
4
3
3
2
3
3
1
2
1
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
SSW
17
1.5
SSW
16
1.5
SSW
16
2.1
SSW
19
2.2
SSW
18
2.1
SSW
16
1.8
SSW
16
1.6
SSW
16
1.3
SSW
15
1.2
SSW
15
1.3
SSW
16
1.3
SSW
16
1.2
SSW
16
1.1
SW
15
0.8
SSW
17
0.9
SSW
16
0.9
SW
16
0.9
SW
15
0.7
SW
14
0.7
SW
14
0.7
SW
13
Wave Graph
Metric surfscale
Energy kJ
1352
1214
1155
3001
2894
2263
1713
1273
730
576
749
798
641
537
381
458
362
318
198
200
166
Wind (km/h)
5
ENE
20
SW
25
SSE
30
SE
30
SE
25
ESE
25
E
20
ESE
20
E
10
NE
5
ESE
15
ENE
20
NNE
15
NNE
20
NNE
30
N
25
W
10
WSW
15
W
20
SW
15
SE
Wind State
off
cross-on
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross
on
on
on
cross-on
cross-off
High Tide
2:19PM0.02m
3:31AM0.01m
2:38PM0.02m
3:27AM0.01m
2:54PM0.02m
3:44AM0.01m
3:06PM0.02m
4:03AM0.01m
3:15PM0.02m
4:29AM0.02m
3:21PM0.02m
5:01AM0.02m
3:19PM0.02m
Low Tide
10:30PM0.00m
6:48AM0.01m
10:12PM0.00m
7:49AM0.01m
10:01PM0.00m
8:36AM0.01m
9:57PM0.00m
9:18AM0.01m
9:54PM0.00m
9:56AM0.01m
10:01PM-0.00m
10:30AM0.01m
10:15PM-0.00m
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:31
6:30
6:28
6:26
6:26
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:07
6:08
6:08
6:09
6:10
6:12
 mm
Temp °C
13
13
12
12
11
10
12
13
12
14
15
16
17
19
20
20
19
15
16
15
12
Feels °C
11
9
7
5
4
5
8
8
9
13
14
14
13
15
15
15
15
12
14
12
8
  • Map Icons:
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  • 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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