Surf Forecasts:
Trigg Beach surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 2AM (local time) - 13ft (4.0m), 15s period, WSW swell with cross-onshore winds.
- Most powerful swell: Tuesday 18 Aug, 2AM (local time) - 13ft (4.0m), 15s period, WSW swell with 7,346 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 13ft (4.0m), 15s period with WSW swell.
Best Forecast Surf Conditions for Trigg Beach this week:
The surf forecast for Trigg Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 4.0m and 15s period. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Trigg Beach in the next 16 days are 4.0m 15s and forecast to arrive on Tuesday (Aug 18) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 21) at 11PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 18th Aug) | 13ft (4.0m) 15s |
| Best Surf | 2AM (Tue 18th Aug) | 13ft (4.0m) 15s |
| Most Powerful | 2AM (Tue 18th Aug) | 13ft (4.0m) 15s |
Table - best surf conditions forecast for Trigg Beach over the next 16 days.
The Lowdown
Alright, let’s talk in feet and degrees.
Trigg Beach is looking pretty wild to start. Monday the 17th is a total dud – we’re looking at a 7ft cross-onshore mess. Tuesday the 18th sees a massive 13ft of WSW groundswell with a 16-second period, but it’s just too much swell for this spot, and the wind is all wrong.
For the real sweet spot, you want to be in the water on the morning of Thursday the 20th. The swell drops to a solid 10ft from the WSW, still carrying that long 16-second interval (4242 energy). The key is the wind – it’s glassy. That’s the session. The water temp is 63°F, which is a bit cooler than average for the time of year.
Friday the 21st morning is another gem. Glassy again, with a 8ft swell at 15 seconds (2207 energy). Picture-perfect for the experienced surfer.
Saturday the 22nd morning is also worth a look: 7ft of very long-period groundswell (17 seconds, 3279 energy) and a light cross-offshore breeze. It might get a bit straight for the sandbars with that long period, but it’ll be clean.
The outlook gets pretty grim after that, with onshore winds and messy conditions taking over for most of the following week. The only two bright spots in the second week are the morning of Thursday the 27th, with clean 6ft waves and light cross-offshore (1447 energy), and Friday the 28th afternoon, which looks glassy with a 7ft, 16-second groundswell (1997 energy). Keep an eye on that Friday session, but don’t hold your breath.
If you’re smart, you’ll pencil in Thursday the 20th and Friday the 21st. Glassy conditions and solid long-period swell don’t come around often.
Stay salty,
Rusty
Short Range ForecastLight rain (total 7mm), mostly falling on Mon afternoon. Very mild (max 18°C on Mon morning, min 14°C on Mon morning). Winds decreasing (strong winds from the W on Mon afternoon, calm by Tue morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sat afternoon, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | WSW 16 | WSW 10 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 17 | WSW 16 | WSW 15 | WSW 14 | WSW 16 | WSW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2331 | 3609 | 7346 | 7293 | 6651 | 4456 | 2691 | 3813 | 4858 | 4242 | 3253 | 2720 | 2207 | 1987 | 1538 | 2642 | 1699 | 1102 | 1601 | 3455 | 2606 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-on | on | cross | on | glassy | glassy | cross-on | cross-off | glassy | cross | off | cross-off | cross-on | cross-off | cross-on | on | cross-on |
High Tide | 9:30AM0.35m | 00:36AM0.52m | 8:35AM0.33m | 1:01AM0.55m | 1:44AM0.56m | 3:25AM0.56m | 4:59AM0.57m | 6:06AM0.59m | |||||||||||||
Low Tide | 4:49PM0.21m | 7:36AM0.33m | 4:33PM0.19m | 3:39PM0.16m | 3:20PM0.13m | 3:31PM0.10m | 3:47PM0.09m | 4:04PM0.08m | |||||||||||||
 |  |  | | | | |  |  | | | | | | | | |  | |  | | |
 | 6:52 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — |
 | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — |
mm | — | 4 | 1 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 |
Temp °C | 18 | 16 | 16 | 16 | 16 | 16 | 15 | 17 | 16 | 16 | 17 | 16 | 16 | 17 | 15 | 17 | 20 | 18 | 17 | 18 | 17 |
Feels °C | 11 | 7 | 9 | 13 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 14 | 15 | 14 | 11 | 14 | 17 | 16 | 15 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | — | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 17 | WSW 16 | WSW 15 | WSW 18 | — | WSW 14 |
| kJ | 2331 | — | 7346 | 7293 | 6651 | 4456 | 2691 | 3813 | 4858 | 4242 | 3253 | 2720 | 2207 | 1987 | 1538 | 2642 | 1699 | 1102 | 596 | — | 2606 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 24 | WSW 20 | WSW 18 | — | WSW 20 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 22 | 485 | 637 | — | 216 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 5 | WSW 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 14 | WSW 16 | — |
| kJ | 133 | 3609 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1601 | 3455 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1126 | 731 | 197 | 299 | 364 | 362 | 7 | 197 | 0 | 0 | 79 | 0 | 0 | 160 | 0 | 0 | 33 | 0 | 340 | 381 | 233 |
Best forecast wave conditions in Perth City Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Trigg Beach Surf forecast
The above surf forecast table for Trigg Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trigg Beach can be found by selecting the local surf guide option on the grey menu. Our Trigg Beach 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 (Trigg Beach) 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 Trigg Beach 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 Perth City Coast? If you are looking for accommodation near Trigg Beach, camping, hotels and holiday cottages in Perth City Coast, consider staying in Perth which is 14 km (9 miles) away. Other places in and around Perth City Coast where you can find information about places to rent, and car hire include Fremantle which is 21 km (13 miles) away, Canning Vale, Gosnells and Kwinana.
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