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 glassy winds.
- Most powerful swell: Tuesday 14 Jul, 12AM (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 Tuesday (Jul 14) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 7s period and expected on Saturday (Jul 18) 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 | 12AM (Tue 14th Jul) | 8ft (2.5m) 17s |
Table - best surf conditions forecast for Trespassers over the next 16 days.
Alright, folks, Rusty here. Let's break down what's coming at Trespassers over the next couple of weeks. This is a reef break, advanced only, and it's fairly consistent overall, but don't expect a constant run of good waves. The first few days are a total write-off – Monday the 13th through Tuesday the 14th morning are all onshore junk with a 19 mph wind, and the swell is big and messy. The water temp is sitting at 59.2°, which is pretty normal for this time of year.
The first real glimmer of hope comes Tuesday afternoon, the 14th, with a 6.6 ft SSW swell and a moderate cross-onshore breeze. It's marginal, but there's a pulse. Then Wednesday the 15th morning is where it gets proper. The wind drops to a glassy 3 mph from the NE, the swell is 4.9 ft from the SSW with a 15-second period, and the combined energy is moderate (1014). That's a clean, lined-up groundswell on a reef – perfect for the advanced crew. Crowds are possible, but with that quality, it's worth the early paddle. Wednesday afternoon stays glassy with 4.6 ft and a 14-second period, energy dropping to 857.
Thursday the 16th morning is cross-off and clean, but the swell drops to 4.3 ft. The afternoon is the other standout: 4.6 ft from the SSW, a 17-second period (very long period groundswell), and light cross-off wind. Combined energy jumps to 1217. That's a solid, powerful wave, but the long period might make it a bit too straight for a beach break, but it's a reef, so it should handle it fine. Friday the 17th is still rideable but more marginal with cross-shore winds.
After that, it fades fast. Saturday the 18th and Sunday the 19th are poor – small, weak, and windy. The energy drops to just 278 on Saturday. Monday the 20th through Tuesday the 21st see a slight bump to 4.3-4.6 ft but with moderate cross-off winds, still only marginal. Then from Wednesday the 22nd through Thursday the 23rd it's back to onshore garbage with fresh breeze and lumpy conditions.
The last week of the window (July 24-28) offers bigger swell again – 5.6 ft to 7.5 ft from the SW – but the wind is consistently cross-on or onshore, often strong. The energy is moderate to strong (1799, 2361, 2779) but the quality is poor or marginal at best. The waves will be choppy and messy
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Very mild (max 15°C on Mon morning, min 12°C on Wed morning). Winds decreasing (fresh winds from the W on Mon morning, calm by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Sat night, min 12°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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 16 | SW 16 | SW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SSW 15 | SSW 17 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 20 | SW 18 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3098 | 3177 | 3695 | 2599 | 2007 | 1288 | 1014 | 857 | 701 | 656 | 1094 | 811 | 843 | 684 | 407 | 268 | 208 | 166 | 97 | 323 | 813 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | glassy | glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross | cross | cross | cross | cross-off | cross |
High Tide | 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 | 6:01AM0.01m | 5:01PM0.02m | ||||||||
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 | ||||||||
 |  |  |  | |  | | |  | | | | | | | | |  | | | | |
 | 7:28 | — | — | 7:28 | — | — | 7:28 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — | 7:26 | — | — |
 | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — |
mm | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 15 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 13 | 14 | 15 | 14 | 16 | 17 | 14 | 16 | 17 |
Feels °C | 9 | 10 | 10 | 12 | 13 | 11 | 12 | 13 | 11 | 11 | 11 | 10 | 9 | 10 | 11 | 9 | 11 | 12 | 10 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SW 14 | SSW 14 | SSW 15 | SSW 17 | SSW 16 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SW 18 | SW 16 |
| kJ | 870 | 892 | 3301 | 2599 | 2007 | 1288 | 1014 | 857 | 701 | 656 | 1094 | 811 | 843 | 684 | 407 | 268 | 208 | 166 | 90 | 323 | 813 |
Swell 2 Height (m) Direction Period (s) | SW 20 | — | — | SW 16 | — | — | — | — | — | — | SSW 18 | — | — | NE 4 | NW 7 | WNW 7 | — | S 22 | SW 20 | SW 12 | W 8 |
| kJ | 190 | — | — | 376 | — | — | — | — | — | — | 123 | — | — | 4 | 24 | 9 | — | 9 | 97 | 95 | 45 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 22 | SW 15 | WNW 5 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 18 | 56 | 4 | — |
Wind waves Height (m) Direction Period (s) | SW 16 | SW 16 | SW 17 | — | W 8 | — | — | — | — | NE 3 | — | — | NE 3 | NE 4 | NNE 2 | N 3 | N 3 | N 3 | N 3 | NNW 4 | NNE 3 |
| kJ | 3098 | 3177 | 3695 | — | 103 | — | — | — | — | 1 | — | — | 4 | 2 | 1 | 1 | 6 | 3 | 5 | 5 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1034 | 1244 | 733 | 733 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 2 | 0 | 17 | 19 | 100 | 100 | 67 | 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.
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