Surf Forecasts:
The Window surf forecast from 16 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: Monday 17 Aug, 11PM (local time) - 16ft (5.0m), 15s period, WSW swell with 11,154 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 8AM (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 Friday (Aug 21) at 8AM. The primary swell is predicted to be 3.5m 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 5.0m 15s and forecast to arrive on Monday (Aug 17) at 11PM. 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+) | 8AM (Fri 21st Aug) | 11ft (3.5m) 15s |
| Best Surf | 5AM (Sat 22nd Aug) | 10ft (3.0m) 17s |
| Most Powerful | 11PM (Mon 17th Aug) | 16ft (5.0m) 15s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright, Rusty here again, lookin' at The Window. This is a heavy reef, and she's gonna be a handful. Water temp is about what you'd expect for this time of year.
The story is big, powerful West to West-Southwest groundswells. The combined energy readings are massive, often in the thousands, like 8700 and 9646. But the wind is the enemy. Monday the 17th into Tuesday, we've got strong onshore winds howling at 25 mph, blasting the place apart. Waves are 13 to 16 feet, way too big for most, and the conditions are junk.
We hit a long stretch from Wednesday the 19th through the end of the work week. The swell holds at 10 to 15 feet with a long 15-16 second period, giving it real punch. The wind stays cross-onshore or cross, so the face is choppy and lumpy. It's marginal. Not the day to bring a log.
Then, a gem. Saturday morning, the 22nd of August. The swell drops to a still-serious 10 feet from the SW with a very long 16-second period. But the key is the wind: it's glassy. Just a whisper. The surf report calls it excellent for experienced surfers. That's it right there. This is a powerful reef, so it's for the crew that knows the place. For clean, heavy surf, this is your only real shot. The wind comes back onshore in the afternoon, so you gotta be first in the water.
Sunday the 23rd gets blown out again, and the rest of the week into September is a tale of shifting onshore winds and fluctuating big swell. Around the 25th and 26th of August, the swell jumps to 18 to 21 feet, combined energy hitting 14,322, but it's with strong cross-winds from the north. That's lumpy, dangerous, and blown out. Better for kites than paddles.
Honestly, for a paddler, the entire 16-day outlook has only one clear standout: that glassy Saturday morning the 22nd at The Window. Hit it early, hit it hard, and get out before it turns.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Mon morning. Very mild (max 18°C on Mon morning, min 13°C on Mon afternoon). Winds decreasing (near gales from the W on Mon afternoon, light winds from the W by Wed night). | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Very mild (max 16°C on Thu morning, min 11°C on Fri 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) | W 14 | WSW 12 | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 18 | SW 16 | SW 15 | SW 14 | WSW 10 | WSW 13 | WSW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6756 | 8856 | 10631 | 9510 | 8429 | 5690 | 7469 | 9167 | 9372 | 6829 | 5692 | 5445 | 4341 | 4341 | 2560 | 4075 | 3017 | 1470 | 2345 | 6864 | 6633 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-off | glassy | cross-on | on | cross-on | cross-on | cross |
High Tide | 8:39AM0.39m | 00:24AM0.53m | 00:40AM0.57m | 1:23AM0.59m | 3:49AM0.60m | 5:28AM0.62m | 6:30AM0.65m | ||||||||||||||
Low Tide | 4:13PM0.27m | 3:20PM0.22m | 3:07PM0.17m | 3:18PM0.13m | 3:36PM0.10m | 3:55PM0.08m | 4:15PM0.07m | ||||||||||||||
 |  |  |  |  |  | |  | |  | | | | |  | | | | | |  | |
 | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — |
 | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — |
mm | 7 | 3 | — | — | 1 | 3 | 1 | — | — | — | 1 | — | — | — | — | — | — | — | 3 | 1 | 3 |
Temp °C | 18 | 14 | 14 | 15 | 15 | 16 | 16 | 15 | 15 | 16 | 16 | 16 | 15 | 15 | 14 | 14 | 15 | 16 | 15 | 14 | 13 |
Feels °C | 10 | 3 | 5 | 10 | 11 | 9 | 12 | 11 | 11 | 14 | 13 | 14 | 14 | 12 | 12 | 14 | 13 | 14 | 8 | 5 | 4 |
Swell 1 Height (m) Direction Period (s) | SW 18 | — | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 15 | SW 14 | WSW 14 | — | — |
| kJ | 1944 | — | 10631 | 9510 | 8429 | 5690 | 7469 | 9167 | 9372 | 6829 | 5692 | 5445 | 4341 | 4341 | 2560 | 4075 | 3017 | 1470 | 791 | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | WSW 24 | — | SW 18 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 55 | — | 2402 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 14 | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 5 | WSW 10 | WSW 13 | WSW 12 |
| kJ | 6756 | 8856 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 113 | 2345 | 6864 | 6633 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 257 | 1322 | 633 | 15 | 15 | 213 | 213 | 260 | 15 | 19 | 3 | 15 | 3 | 3 | 3 | 0 | 0 | 3 | 69 | 363 | 1688 |
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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