
Surf Forecasts:
Trespassers surf forecast from 13 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 12AM (local time) - 5.5ft (1.7m), 15s period, SSW swell with glassy 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. The wind is predicted to be glassy 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 7s period and expected on Saturday (Jul 18) at 3AM.
| 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.
Alright, let’s see what we’ve got. The first few days are a bit rough, but the middle of the week shapes up real nice. The standout is Wednesday and Thursday—clean, lined-up waves with that long-period groundswell pushing in.
Right now, on Monday the 13th, it’s a no-go. We’re looking at 8ft of SW swell but it’s getting hammered by a 30 km/h westerly wind. The combined energy is strong at 4028, but it’s just a blown-out mess.
Tuesday the 14th sees the swell drop a bit to 7ft, still from the SSW, but the wind is still cross-on and choppy. The energy is still solid (2975) but the quality is marginal.
Now, Wednesday the 15th, that’s where it gets good. Overnight the wind swings to a light NNE breeze, and by the morning we’ve got 5ft of SSW swell, 15-second period, and the conditions are clean. The combined energy is a moderate 1014, but the real story is that glassy afternoon—wind goes dead calm, 5ft of SW swell, period 14 seconds, and it’s clean as a whistle. This is the best of the run. Trespassers (reef) is an advanced spot, and it’s fairly consistent. The optimum swell direction is SSW, so this is right in the slot. Water temp is 59°, which is pretty average for this time of year. On Wednesday afternoon, you’ll have the place to yourself—crowds are only sometimes, so you might get lucky.
Thursday the 16th keeps the goodness going. Morning brings 5ft of SSW swell, 15-second period, with a light NNE cross-off breeze. Clean lines. Energy is 898—moderate but punchy. The afternoon gets a little more cross-shore, but still surfable.
Friday the 17th still has that clean cross-off flow, with 5ft SSW swell and a 17-second period in the morning. That’s a long period groundswell, so it’s gonna be well-shaped, but it might break a bit straight on the reef if you’re not careful. Still, the energy is solid (1043) and the conditions are good.
After that, the swell fades over the weekend. Saturday the 18th drops to 3ft with a 20 km/h cross-off wind—clean but small. Sunday the 19th is a bit of a mixed bag; a 4ft pulse with a very long 18-second period appears in the afternoon, but the wind is cross-off and the energy is 938. Might be worth a look if you’re keen, but it’s inconsistent.
From Monday the 20th through to Wednesday the 22nd, it’s mostly small and weak, with wind messing things up. The combined energy drops below 200 by Wednesday the 22nd, and you’re looking at 1ft surf on the 22nd afternoon—glassy but tiny. Not worth the drive.
There’s a bit of a pulse on the 23rd with 5ft SW swell, but the wind is cross and the energy is moderate at 780. Still, the conditions are only marginal. Then on the 24th, we get a decent SSW swell at 5ft, 17-second period, with a light cross-on breeze. Energy is 1530—moderate-strong—but the wind is onshore, so it’s choppy.
The rest of the run into the 28th is mostly poor, with strong winds and messy conditions. The 27th has a 4ft SSW swell, 18-second period, but with a 45 km/h cross wind, it’s just a washing machine. Not for paddling; maybe kite surfing if you’re into that.
So, bottom line: the best window is Wednesday the 15th through Friday the 17th. Wednesday afternoon is the absolute standout—glassy, clean, and that long-period groundswell is going to make for some beautiful, powerful waves at Trespassers. Get on it.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Very mild (max 15°C on Mon afternoon, min 12°C on Wed morning). Winds decreasing (fresh winds from the W on Mon afternoon, calm by Tue night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Sat night, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Mon 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 20 | SW 18 | SW 16 | SW 15 |
Wave Graph | |||||||||||||||||||||
3136 | 3457 | 2599 | 2007 | 1288 | 1014 | 857 | 701 | 818 | 933 | 791 | 1043 | 843 | 489 | 313 | 208 | 166 | 186 | 786 | 728 | 799 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | glassy | cross-off | glassy | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross |
High Tide | 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 | 6:01AM0.01m | 5:01PM0.02m | 7:05AM0.01m | ||||||||
Low Tide | 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 | 10:23AM0.01m | 00:17AM0.00m | 10:39AM0.01m | |||||||
— | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | |
5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — | 5:30 | |
mm | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 14 | 15 | 13 | 16 | 17 | 14 | 16 | 17 | 15 |
Feels °C | 9 | 10 | 12 | 12 | 13 | 12 | 13 | 11 | 10 | 11 | 10 | 10 | 11 | 12 | 9 | 12 | 13 | 9 | 12 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SSW 15 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SW 15 | SW 14 | SW 13 | SW 13 | SW 12 | SW 18 | SW 16 | SW 15 |
892 | 3457 | 2599 | 2007 | 1288 | 1014 | 857 | 701 | 818 | 933 | 791 | 1043 | 843 | 489 | 313 | 208 | 166 | 92 | 786 | 728 | 799 | |
Swell 2 Height (m) Direction Period (s) | — | — | SW 16 | — | — | — | — | — | SW 18 | — | — | — | NE 3 | NW 7 | WNW 7 | WNW 7 | SW 22 | SW 20 | NE 4 | W 9 | — |
— | — | 376 | — | — | — | — | — | 80 | — | — | — | 2 | 23 | 10 | 5 | 18 | 186 | 1 | 85 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 22 | SSW 15 | WSW 13 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 18 | 21 | 145 | — | — | |
Wind waves Height (m) Direction Period (s) | SW 16 | SW 17 | — | W 8 | — | — | — | — | NE 3 | ENE 3 | — | NE 3 | NNE 4 | — | NNE 3 | N 3 | N 3 | N 3 | NW 5 | NNE 2 | N 3 |
3136 | 1702 | — | 105 | — | — | — | — | 1 | 1 | — | 2 | 5 | — | 2 | 4 | 3 | 5 | 7 | 1 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1324 | 733 | 733 | 13 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 100 | 79 | 79 | 17 | 79 | 14 | 19 |
Best forecast wave conditions in Yorke Peninsula | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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.











