Surf Forecasts:
The Window surf forecast from 12 Aug 2026:
- Best quality surf: Thursday 13 Aug, 5AM (local time) - 13ft (4.0m), 15s period, SW swell with glassy winds.
- Most powerful swell: Monday 17 Aug, 8PM (local time) - 15ft (4.5m), 17s period, WSW swell with 12,757 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 2AM (local time) - 13ft (4.0m), 15s 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 Thursday (Aug 13) at 2AM. The primary swell is predicted to be 4.0m and 15s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Window in the next 16 days are 4.5m 17s and forecast to arrive on Monday (Aug 17) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Sunday (Aug 16) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 13th Aug) | 13ft (4.0m) 15s |
| Best Surf | 5AM (Thu 13th Aug) | 13ft (4.0m) 15s |
| Most Powerful | 8PM (Mon 17th Aug) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s cut to the chase. The only game in town for the next couple of weeks is The Window. It’s an advanced reef setup, fairly consistent, and needs a solid SW groundswell to light up. The water’s sitting at a noticeable 66.6°, a touch warmer than average for this time of year, so you might not need the thickest rubber.
The real standout is Thursday morning, August 13th. We’ve got a solid 13.1ft SW groundswell hitting with a super-long 16-second period (that’s proper groundswell energy) and the wind is glassy – absolute perfection. The combined energy is a strong 7979, and conditions are set to be exceptional for you expert guys out there. This is the window within The Window.
Leading up to that, Wednesday afternoon (August 12th) has the swell already there at 13.1ft (SW, 15-second period, 5889 energy), but the cross-on wind makes it a bit choppy and only marginal. It’s the size for a session, but not the quality.
After that peak on Thursday morning, Thursday afternoon (August 13th) drops to a light cross-on breeze with the swell still pumping 13.1ft at 17 seconds (8473 energy), but that wind direction takes the shine off. Friday morning (August 14th) offers a clean 11.5ft swell (SW, 16 seconds, 5535 energy) with a nice cross-off breeze – a solid option for experienced surfers.
We hit a long, poor stretch from Sunday, August 16th through Tuesday, August 25th. The swell is either too big and messy or blown to hell by strong winds. There’s a day on August 20th where the combined energy hits a massive 20819 and a 19.7ft swell arrives, but the onshore wind is horrendous. The setup is so big and wind-affected here it looks more interesting for kite surfing than paddle surfing. Just sit this one out.
Saturday morning, August 22nd, offers a glimmer with a 14.8ft SW swell and gentle cross-onshore (8461 energy), but it’s still on the choppy side. The final decent-looking window is Sunday morning, August 23rd, with a clean 11.5ft SW swell (14 seconds, 5001 energy) under a cross-off breeze from the NNE. It’s a late call and a long way off, so file it under “promising but less certain.”
Bottom line: don’t miss that Thursday morning glass-off. The rest is a battle with wind and size.
Short Range ForecastMostly dry. Very mild (max 16°C on Sat morning, min 11°C on Thu morning). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 30mm), heaviest during Mon afternoon. Warm (max 20°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the ENE on Sat night, strong winds from the W by Mon afternoon). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 15 | WSW 18 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 5889 | 6356 | 7979 | 8473 | 6984 | 5535 | 4402 | 3517 | 2613 | 2029 | 1708 | 3702 | 3651 | 2361 | 6269 | 12184 | 9939 | 10140 | 9276 | 5709 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | cross-on | off | cross-off | cross-on | off | cross-off | cross | off | cross-off | cross-off | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:02AM0.74m | 10:36AM0.65m | 1:03AM0.35m | 10:57AM0.54m | 00:36AM0.41m | 10:30AM0.44m | 00:25AM0.48m | 8:39AM0.39m | 00:24AM0.53m | 00:40AM0.57m | ||||||||||
Low Tide | 6:16PM0.03m | 6:41PM0.12m | 6:45PM0.22m | 3:25AM0.34m | 6:04PM0.29m | 4:53AM0.36m | 5:04PM0.31m | 6:21AM0.38m | 4:13PM0.27m | 3:20PM0.22m | ||||||||||
 |  | | | | | | | | | | | |  |  |  |  |  |  |  | |
 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — |
 | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | 22 | 5 | — | — | 1 |
Temp °C | 14 | 14 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 16 | 17 | 20 | 19 | 18 | 15 | 15 | 15 | 15 | 15 |
Feels °C | 11 | 12 | 13 | 11 | 11 | 11 | 13 | 14 | 11 | 13 | 15 | 10 | 15 | 15 | 12 | 8 | 8 | 9 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 15 | SW 16 | SW 17 | SW 16 | SW 16 | SW 15 | SW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 15 | WSW 18 | — | — | WSW 16 | WSW 16 | WSW 15 |
| kJ | 5889 | 6356 | 7979 | 8473 | 6984 | 5535 | 4402 | 3517 | 2613 | 2029 | 1708 | 3702 | 3651 | 2361 | 6269 | — | — | 10140 | 9276 | 5709 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SW 16 | W 20 | SW 22 | SW 19 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1097 | 194 | 386 | 2276 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 5 | SW 24 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 11 | 88 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | N 4 | N 5 | — | NNE 4 | N 5 | NNW 4 | NNW 5 | WSW 17 | WSW 16 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 33 | 29 | — | 30 | 76 | 21 | 133 | 12184 | 9939 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 3 | 0 | 0 | 3 | 0 | 0 | 3 | 0 | 69 | 2 | 0 | 177 | 75 | 157 | 213 | 475 | 1117 | 15 | 363 | 231 |
Best forecast wave conditions in Margaret River | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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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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