Surf Forecasts:
The Window surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11PM (local time) - 11ft (3.5m), 15s period, WSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 11AM (local time) - 15ft (4.5m), 18s period, WSW swell with 12,544 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 11PM (local time) - 11ft (3.5m), 15s period with WSW 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 20) at 11PM. The primary swell is predicted to be 3.5m and 15s 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 4.5m 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+) | 11PM (Thu 20th Aug) | 11ft (3.5m) 15s |
| Best Surf | 11PM (Thu 20th Aug) | 11ft (3.5m) 15s |
| Most Powerful | 11AM (Wed 26th Aug) | 15ft (4.5m) 18s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's talk about what's on the menu at The Window.
We're looking at a solid, extended run of swell here, but the wind is going to be the real story. The water's sitting at 66°, which is a touch warmer than usual for this time of year. The real standout window is going to be the morning of Friday the 21st of August. You've got a clean 12ft SW groundswell, with those long 14-second lines, and a light offshore breeze from the NE. That's about as good as it gets for an advanced wave, but with that size and power, this is strictly for the experienced crew. The combined energy is moderate to strong at (4862), so you'll feel it.
After that, the wind gets messy. Saturday the 22nd and Sunday the 23rd look choppy and cross-shore, with the swell holding around 8ft to 10ft. Not worth paddling out for the conditions on offer.
There's another clean morning on Monday the 24th of August, with a 10ft SW swell and a light NNE cross-offshore breeze that'll keep it clean. Again, expert territory with the moderate energy (2681).
The middle of the following week gets blown out by strong onshore winds, even though the swell jumps up to a sizeable 15ft on Wednesday the 26th of August. That setup looks more interesting for kite surfing than paddle surfing, with a fresh cross-onshore making it lumpy.
We get a reprieve on Friday the 28th of August. A clean 7ft SW swell, with a 12-second period and light E offshore wind. This is the second best option of the whole outlook; still a decent wave but more manageable than the earlier big days. The energy is weak to moderate (1385), but the conditions will be glassy.
The end of the outlook into early September is a mixed bag. There's a clean morning on Wednesday the 2nd of September with 10ft of SW swell and an offshore E breeze. That could be special, but it's a long way out, so take it as a promising possibility rather than a lock. Crowds at The Window can be a problem when it's on, so expect company if you go for the Friday or Monday morning sessions.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Wed night, min 12°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Sun morning. Very mild (max 16°C on Tue afternoon, min 11°C on Mon morning). Winds decreasing (fresh winds from the SSW on Sun morning, light winds from the NW by Mon night). | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 16 | WSW 16 | SW 15 | SW 14 | SW 14 | WSW 18 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 10 | WSW 13 | WSW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 9256 | 6515 | 6308 | 5735 | 4720 | 5116 | 2603 | 3953 | 3137 | 1688 | 2318 | 2207 | 4655 | 2886 | 2008 | 1111 | 520 | 1915 | 5370 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-off | glassy | cross | cross-off | cross | cross | cross | cross | cross | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 1:23AM0.59m | 3:49AM0.60m | 5:28AM0.62m | 6:30AM0.65m | 7:16AM0.68m | 7:56AM0.70m | |||||||||||||
Low Tide | 3:18PM0.13m | 3:36PM0.10m | 3:55PM0.08m | 4:15PM0.07m | 4:34PM0.07m | 4:51PM0.09m | |||||||||||||
 |  | |  |  | | |  | | |  | | | | | | | |  | |
 | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — |
 | 5:52 | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:55 | — | — | 5:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | 2 |
Temp °C | 16 | 16 | 15 | 15 | 14 | 15 | 14 | 14 | 15 | 14 | 15 | 14 | 13 | 12 | 13 | 14 | 15 | 16 | 17 |
Feels °C | 13 | 12 | 12 | 13 | 13 | 13 | 11 | 11 | 11 | 10 | 11 | 8 | 8 | 10 | 11 | 12 | 11 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 13 | SW 13 | SW 14 | SW 13 | SW 13 | SW 12 | SW 10 | WSW 13 | WSW 16 |
| kJ | 9256 | 6515 | 6308 | 5735 | 4720 | 5116 | 2603 | 3953 | 3137 | 1688 | 2318 | 2207 | 4655 | 2886 | 2008 | 1111 | 520 | 1915 | 5370 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SW 24 | SW 20 | WSW 18 | — | — | WSW 20 | WSW 18 | WSW 16 | — | — | — | — | WSW 15 | — | S 13 |
| kJ | — | — | — | — | 142 | 1261 | 2490 | — | — | 75 | 454 | 1487 | — | — | — | — | 414 | — | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 4 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 12 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 15 | 15 | 3 | 0 | 0 | 3 | 0 | 3 | 3 | 3 | 55 | 76 | 0 | 0 | 15 | 2 | 69 | 260 | 213 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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