Surf Forecasts:
The Window surf forecast from 3 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 13ft (4.0m), 17s period, SW swell with offshore winds.
- Most powerful swell: Sunday 6 Sep, 11PM (local time) - 15ft (4.5m), 17s period, SW swell with 10,886 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 13ft (4.0m), 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 Monday (Sep 07) at 2AM. The primary swell is predicted to be 4.0m and 17s period. The wind is predicted to be offshore 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 Sunday (Sep 06) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Wednesday (Sep 09) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 13ft (4.0m) 17s |
| Best Surf | 2AM (Mon 7th Sep) | 13ft (4.0m) 17s |
| Most Powerful | 11PM (Sun 6th Sep) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright, Rusty here, and I’ve had a good look at The Window for the next couple of weeks. It's a reef break, so you know it's got some punch. But honestly, you're going to need some patience because the first few days are a total write-off.
Thursday the 3rd and Friday the 4th? Forget it. We’re talking big, messy onshore wind and huge, ugly swell. The Window is seeing 11 to 16-foot waves, but it’s choppy and blown out. The water’s about 65°F, which is a touch warmer than usual for this time of year, but that’s the only good thing about it. Saturday the 5th is more of the same with rain and howling winds. No good.
Sunday the 6th finally cleans up with a cross-off breeze, but the conditions are still only marginal. You’ve got about 15 feet of SW swell, but it’s not the one.
Now, let’s talk about when to actually paddle out. Monday the 7th is a proper standout. The morning session is looking mint – clean conditions with a light cross-off breeze and a solid 11-foot SW groundswell. The period is a very long 16 seconds, which means it’s gonna have some serious grunt and long lulls. For a reef like this, that’s a dream. The energy is pumping at 6816. This is an expert wave, and it’s delivering.
Tuesday the 8th is the absolute highlight. The morning has a clean 13-foot WSW swell with a light offshore wind. But the afternoon? That’s the one. You’re looking at glassy, clean 13-foot waves from the WSW with an incredibly long 18-second period. The energy is off the charts at 9590. This is as good as it gets. The swell direction matches the optimum for The Window, and the winds are glass. It’s advanced and sometimes crowded, but for this quality, you deal with it.
After that, it drops off. Wednesday the 9th and Thursday the 10th are smaller and a bit onshore. We get another big pulse on Saturday the 12th, but with 15-foot waves and strong onshore winds, it’s a mess. That’s more of a kite-surfing day than a paddle day.
Looking into the second week, Monday the 14th is promising. The morning is glassy with a clean 10-foot SW swell (14 seconds). It’s rated excellent for experienced surfers, so a solid backup if you missed the big days. The rest of that week is smaller and cleaner but not as powerful. The final days from the 16th to the 18th fade out, dropping to around 5 to 6 feet, with only marginal conditions.
The bottom line: the start is rough, but the payoff on the 7th and 8th is world-class. Don’t sleep on it.
Rusty.
Short Range ForecastModerate rain (total 10mm), heaviest on Sat afternoon. Very mild (max 16°C on Thu morning, min 13°C on Fri afternoon). Winds increasing (light winds from the NW on Thu morning, near gales from the S by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Tue afternoon, min 10°C on Tue morning). Winds decreasing (fresh winds from the S on Sun afternoon, calm by Tue afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | SW 15 | SW 14 | WSW 10 | WSW 13 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | SW 11 | SW 13 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 16 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5726 | 4334 | 4149 | 7962 | 8885 | 7338 | 4530 | 4862 | 7380 | 5628 | 4681 | 9849 | 6816 | 5722 | 5115 | 7873 | 9590 | 6221 | 4700 | 4028 | 3038 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross | cross-off | cross-off | off | cross-off | cross-off | off | off | glassy | off | cross-off | cross-on | off |
High Tide | 1:24AM0.66m | 3:50AM0.67m | 5:36AM0.70m | 6:47AM0.73m | 7:44AM0.73m | 8:33AM0.71m | 00:03AM0.36m | ||||||||||||||
Low Tide | 1:47PM0.13m | 2:16PM0.05m | 2:49PM0.00m | 3:24PM-0.02m | 3:58PM-0.01m | 4:29PM0.03m | 4:54PM0.10m | 1:33AM0.36m | |||||||||||||
 |  |  | | |  |  |  | |  | |  | | | | | | | | | | |
 | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — |
 | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — |
mm | — | — | 3 | — | — | — | 1 | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 16 | 15 | 14 | 14 | 16 | 16 | 13 | 15 | 15 | 12 | 14 | 16 | 13 | 14 | 18 | 17 | 14 | 17 | 17 |
Feels °C | 10 | 9 | 9 | 8 | 9 | 9 | 10 | 9 | 3 | 7 | 7 | 7 | 11 | 11 | 8 | 11 | 17 | 14 | 9 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SW 14 | — | WSW 13 | WSW 15 | WSW 14 | WSW 14 | — | WSW 22 | SW 13 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 16 | WSW 18 | WSW 16 | WSW 16 | WSW 15 | WSW 15 |
| kJ | 5726 | 4334 | — | 7962 | 8885 | 7338 | 4530 | — | 46 | 5628 | 4681 | 9849 | 6816 | 5722 | 5115 | 7873 | 9590 | 6221 | 4700 | 4028 | 3038 |
Swell 2 Height (m) Direction Period (s) | — | — | — | WSW 21 | W 18 | — | — | — | — | WSW 20 | SW 18 | — | — | — | — | — | — | — | — | — | SW 26 |
| kJ | — | — | — | 90 | 785 | — | — | — | — | 664 | 3219 | — | — | — | — | — | — | — | — | — | 26 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | WNW 6 | WSW 10 | — | — | — | — | WSW 13 | SW 11 | S 9 | — | — | — | — | — | — | — | — | NE 4 | N 5 | — |
| kJ | — | 167 | 4149 | — | — | — | — | 4862 | 7380 | 575 | — | — | — | — | — | — | — | — | 17 | 11 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 213 | 310 | 671 | 2168 | 15 | 213 | 213 | 213 | 754 | 1688 | 78 | 0 | 0 | 19 | 0 | 0 | 0 | 0 | 2 | 15 | 0 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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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