
Surf Forecasts:
Trespassers surf forecast from 12 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 12AM (local time) - 5.5ft (1.7m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 9PM (local time) - 8ft (2.5m), 17s period, SW swell with 3,695 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 12AM (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 (Jul 15) at 12AM. The primary swell is predicted to be 1.7m and 15s period with a secondary swell of 0.7m and 8s. 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 2.5m 17s and forecast to arrive on Monday (Jul 13) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Sunday (Jul 19) at 12AM.
| Wave Type | Time (ACST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 15th Jul) | 5.5ft (1.7m) 15s |
| Best Surf | 12AM (Wed 15th Jul) | 5.5ft (1.7m) 15s |
| Most Powerful | 9PM (Mon 13th Jul) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
Right, settle in, I’m looking at the outlook for Trespassers only. This is a proper reef break, advanced territory, and it’s fairly exposed to the swell. Water temp is sitting around 59°, which is about 0.9° cooler than the norm for this time of year – nothing to write home about, just your standard winter chill.
For the first week, it’s a bit of a write-off, if I’m honest. We’ve got a big pulse of swell coming in, but it’s all pinned with onshore winds. Sunday the 12th through Tuesday the 14th, we’re looking at 7 ft to 8 ft of SW groundswell, with a long period around 13 to 16 seconds, but the wind is howling on it from the west and southwest. That’s a big, messy, blown-out combo. The wave energy is huge (2235 to 4406), but it’s just a washing machine. Don’t bother.
Then Wednesday the 15th, a switch flips. The swell drops to a clean 5 ft from the SW, period holding at 14-15 seconds, and the wind goes glassy – dead calm from the ENE and NW. That’s the first real window. Conditions are going to be *very* good, with that long period groundswell wrapping into the reef. The energy is moderate (905), but the quality will be there. This is your best early bet. Thursday the 16th stays clean with a light offshore flow, but the swell drops to 4-4 ft. Still fun, but not the standout.
Friday the 17th and Saturday the 18th see the swell fade out to under 3 ft, and the wind comes back. It’s a flat, choppy mess. The 19th has a spike in period (19 seconds) but it’s cross-shore wind and poor conditions – not worth the paddle.
Now, here’s the real standout. Look at Monday the 20th. We get a massive pulse of 8 ft SW swell, with a 15-second period, and the wave energy goes ballistic at 5025. The catch? It’s onshore wind from the WNW. That’s a big, powerful, and messy session. The file says “marginal” because of that wind, so don’t get your hopes up for peak conditions, but if you’re an expert looking for raw power, it’s there.
But the *true* gold is on the following Saturday, the 25th. The swell comes back to 6 ft to 6 ft from the SW, period 16 seconds, and the wind is a light offshore-angled breeze from the NE and NNE. The energy is strong (1443 to 1890), and the report calls it “excellent” for experienced surfers. That is your best session in the whole 16-day window. The break is a reef, so that long period will set up perfectly. Just be warned, crowds are “sometimes” a thing here, so you might have some company.
After that, the 26th and 27th have dropping swell and cross-shore winds, so it tapers off.
So, to wrap it up: the first week is a write-off until Wednesday the 15th for a clean, mid-sized session. The absolute standout is Saturday the 25th at Trespassers – 6 ft of SW groundswell, light offshore wind, clean conditions, and a reef break that loves that long period. That’s the one to circle on the calendar. Everything else is either blown out or too small.
Stay patient, keep your eye on that Saturday the 25th.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Very mild (max 15°C on Sun afternoon, min 13°C on Tue night). Winds decreasing (fresh winds from the W on Sun morning, calm by Tue night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Fri afternoon, min 12°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 13 | SW 13 | SW 14 | SW 16 | SW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 17 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 |
Wave Graph | |||||||||||||||||||||
1697 | 1697 | 1875 | 3098 | 2978 | 3301 | 2599 | 2007 | 1288 | 905 | 763 | 614 | 476 | 998 | 921 | 832 | 631 | 401 | 215 | 178 | 161 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross-off | glassy | glassy | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross-off | cross |
High Tide | 3:07PM0.02m | 3:29PM0.03m | 2:26AM0.00m | 4:01PM0.03m | 2:56AM0.00m | 4:24PM0.03m | 3:36AM0.01m | 4:44PM0.02m | 4:18AM0.01m | 4:58PM0.02m | 5:06AM0.01m | 5:04PM0.02m | |||||||||
Low Tide | 6:23AM0.00m | 00:51AM0.00m | 7:20AM0.00m | 00:37AM0.00m | 8:06AM0.00m | 00:28AM0.00m | 8:47AM0.00m | 00:15AM0.00m | 9:24AM0.00m | 00:15AM0.00m | 9:56AM0.00m | 00:16AM0.00m | |||||||||
7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | |
— | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | |
mm | — | — | — | — | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 15 | 16 |
Feels °C | 7 | 9 | 10 | 9 | 10 | 10 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 11 | 10 | 9 | 10 | 10 | 7 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SSW 13 | SW 12 | SSW 17 | SW 16 | SW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 17 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 |
538 | 456 | 622 | 3098 | 2978 | 3301 | 2599 | 2007 | 1288 | 905 | 763 | 614 | 476 | 998 | 921 | 832 | 631 | 401 | 215 | 178 | 161 | |
Swell 2 Height (m) Direction Period (s) | — | — | SSW 21 | — | — | — | SW 16 | SW 16 | W 8 | — | — | — | SSW 19 | SSW 18 | — | — | — | — | WNW 7 | W 7 | SW 22 |
— | — | 45 | — | — | — | 376 | 406 | 64 | — | — | — | 143 | 106 | — | — | — | — | 9 | 8 | 118 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 24 | SSW 22 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | 46 | |
Wind waves Height (m) Direction Period (s) | SW 13 | SW 13 | SW 14 | WSW 6 | SW 16 | W 8 | — | — | — | — | — | — | NNE 2 | NNE 3 | NE 2 | NE 3 | NE 3 | NE 2 | N 3 | N 3 | N 3 |
1697 | 1697 | 1875 | 117 | 1428 | 247 | — | — | — | — | — | — | 1 | 1 | 1 | 1 | 2 | 1 | 6 | 6 | 7 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1184 | 1269 | 722 | 1034 | 1430 | 733 | 160 | 160 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 100 | 14 | 14 | 100 | 100 | 149 |
Best forecast wave conditions in Yorke Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










