Surf Forecasts:
The Window surf forecast from 21 Aug 2026:
- Best quality surf: Saturday 22 Aug, 5AM (local time) - 10ft (3.0m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 11AM (local time) - 18ft (5.5m), 18s period, WSW swell with 17,108 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 5AM (local time) - 10ft (3.0m), 17s period with SW swell.
Best Forecast Surf Conditions for The Window this week:
The surf forecast for The Window over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 22) at 5AM. The primary swell is predicted to be 3.0m and 17s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at The Window in the next 16 days are 5.5m 18s and forecast to arrive on Wednesday (Aug 26) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 22nd Aug) | 10ft (3.0m) 17s |
| Best Surf | 5AM (Sat 22nd Aug) | 10ft (3.0m) 17s |
| Most Powerful | 11AM (Wed 26th Aug) | 18ft (5.5m) 18s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Right, Rusty here. Let’s get real about The Window.
We’ve got a bunch of swell coming through, but it’s kicking off with a lot of wind and chop for the first few days. From Saturday the 22nd through Monday the 24th, it’s all messy cross-shore winds and lumpy, bumpy waves. Not worth getting wet.
The first solid window opens on Thursday morning the 27th of August. That 12-foot swell from the WSW is carrying a 14-second period and the wind swings cross-shore rather than onshore. It’s still a heavy wave, with moderate wave energy (5534), so only for the experienced crew.
The real winner, the one that really gets me going, is Friday morning the 28th of August. We get a 8-foot swell from the southwest with a 12-second period and a light offshore breeze from the northeast. It’s clean, it’s lined up, and the reef will be working. The combined swell energy is moderate (1552), but that offshore wind makes all the difference. That’s your session.
Monday afternoon the 31st of August is another gem: glassy conditions, flat calm wind, with an 8-foot, 17-second groundswell. That’s a long-period, powerful swell, but because it’s glassy, you can truly enjoy the shape. It’s built for the experts.
After that, the onshore wind returns early September and things turn choppy and messy again. Stick to that Friday the 28th of August if you want the best of what’s on offer.
Rusty.
Short Range ForecastSome drizzle, heaviest during Sun morning. Very mild (max 15°C on Fri night, min 11°C on Mon morning). Winds decreasing (fresh winds from the SSW on Sat afternoon, calm by Sun night). | Days 5-7 Weather SummaryHeavy rain (total 38mm), heaviest during Tue night. Very mild (max 17°C on Tue morning, min 13°C on Wed night). Winds decreasing (strong winds from the NW on Tue night, light winds from the S by Thu morning). | ||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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 18 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | WSW 15 | WSW 13 | WSW 13 | WSW 12 | WSW 14 | WSW 13 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | WSW 14 | SW 14 | SW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 2603 | 3953 | 3137 | 1785 | 2207 | 2071 | 4631 | 2820 | 2021 | 1579 | 3484 | 3309 | 7074 | 17108 | 13968 | 8748 | 5534 | 4463 | 2490 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | cross | cross-on | glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off |
High Tide | 5:28AM0.62m | 6:30AM0.65m | 7:16AM0.68m | 7:56AM0.70m | 8:31AM0.71m | 9:03AM0.69m | 11:40PM0.34m | ||||||||||||
Low Tide | 3:55PM0.08m | 4:15PM0.07m | 4:34PM0.07m | 4:51PM0.09m | 5:03PM0.11m | 5:10PM0.14m | 2:00AM0.33m | ||||||||||||
 |  |  |  |  |  | | | | |  | |  | | |  | | | | |
 | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:45 | — | — |
 | 5:53 | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | 1 | 4 | 31 | 1 | — | 1 | — | — | — |
Temp °C | 15 | 15 | 15 | 14 | 15 | 14 | 13 | 14 | 15 | 16 | 17 | 17 | 17 | 15 | 15 | 13 | 14 | 14 | 14 |
Feels °C | 12 | 11 | 9 | 9 | 12 | 9 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 8 | 7 | 7 | 10 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | WSW 15 | WSW 13 | WSW 13 | WSW 12 | WSW 14 | WSW 13 | WSW 22 | WSW 18 | WSW 17 | WSW 16 | WSW 14 | SW 14 | SW 13 |
| kJ | 2603 | 3953 | 3137 | 1785 | 2207 | 2071 | 4631 | 2820 | 2021 | 1579 | 3484 | 3309 | 263 | 17108 | 13968 | 8748 | 5534 | 4463 | 2490 |
Swell 2 Height (m) Direction Period (s) | WSW 18 | — | — | WSW 20 | WSW 18 | WSW 16 | — | — | — | WSW 18 | — | — | WSW 22 | — | — | — | — | — | — |
| kJ | 2490 | — | — | 75 | 360 | 1410 | — | — | — | 390 | — | — | 363 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 4 | — | — | — | — | — | — | NW 4 | NW 6 | NW 6 | WSW 15 | — | — | — | — | — | — |
| kJ | — | — | 36 | — | — | — | — | — | — | 26 | 114 | 171 | 7074 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 19 | 363 | 3 | 3 | 19 | 0 | 2 | 156 | 69 | 260 | 231 | 213 | 363 | 1688 | 19 | 3 | 3 | 0 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our The Window surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the The Window Surf forecast
The above surf forecast table for The Window provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Window can be found by selecting the local surf guide option on the grey menu. Our The Window 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 (The Window) 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 The Window 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.
The Window is 74 km (46 miles) from the city of Bunbury. If you plan a holiday in Margaret River, look for hotels and other accommodation in Bunbury. Bunbury has rooms for a wide range of budgets as well as car hire and transport links.
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