
Surf Forecasts:
The Window surf forecast from 4 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 5AM (local time) - 13ft (4.0m), 16s period, SW swell with offshore winds.
- Most powerful swell: Sunday 6 Sep, 11PM (local time) - 15ft (4.5m), 17s period, SW swell with 10,899 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11AM (local time) - 11ft (3.5m), 16s 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 11AM. The primary swell is predicted to be 3.5m and 16s 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 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 1.3m 5s period and expected on Thursday (Sep 10) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Mon 7th Sep) | 11ft (3.5m) 16s |
| Best Surf | 5AM (Tue 8th Sep) | 13ft (4.0m) 16s |
| 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
Righto, let’s have a squiz at what’s coming up at The Window over the next couple of weeks. This is a proper reef setup, advanced only, and it’s fairly consistent when the swell lines up. The optimum direction for a decent wave here is from the SW, so we’ll be keeping a close eye on that.
We kick off on Friday the 4th of September, and honestly, it’s a write-off to start. The water temp is sitting at 65°, which is about average for this time of year. But the wind is a fresh cross-onshore from the SW, smashing into a solid 16 ft WSW swell. The combined energy is a meaty 8243 (moderate to strong), but the conditions are lumpy and poor. Not a paddle out worth taking. That blowy, messy vibe hangs over Saturday the 5th too, with rain and lumpy, choppy conditions on 12 ft to 10 ft swell. We don’t get a decent look until Sunday morning the 6th.
Sunday the 6th sees the wind swing to a cross-off from the SSE. It’s still a fresh breeze, but the surf is cleaner. A 13 ft SW swell with a 12-second period and 6692 energy is on offer. It’s marginal for tide, but cleaner. That leads into the first real standout.
Monday the 7th of September is where it gets interesting. Morning sees a gentle cross-off breeze from the SE, and a 12 ft SW groundswell with a very long 16-second period. The energy is 6307, which is moderate to strong. The wave comment calls it excellent for experienced surfers. That long period will have the sets stacking up nicely on this reef, making for some proper, powerful walls. The wind stays clean through the day.
Then, we have our absolute highlight. Tuesday the 8th of September afternoon. The wind drops to a slight air from the SSE, practically glassy, and the swell solidifies to a 13 ft WSW groundswell with a 17-second period and huge 8267 energy. The description says exceptional for expert surfers. This is the session to point your board at. If you can handle the size and power of a 13 ft wave on the reef, this is the best clean window of the whole forecast. Crowds are a possibility at The Window, but with this size, the pack will be thinner.
Wednesday the 9th stays clean through the morning with a cross-off breeze, and a lighter 10 ft WSW swell, with the afternoon turning offshore from the ENE and a light breeze. Conditions are excellent for experienced surfers again.
The swell drops off into Thursday the 10th and Friday the 11th, with smaller 6 ft to 8 ft clean surf, but long periods of 14 to 20 seconds. The energy is lower, but the shape will be good on the reef.
We then hit a gap of poor conditions. Saturday the 12th and Sunday the 13th are blown out by strong onshore winds, with the Sunday seeing near gale-force winds and a massive 18 ft to 20 ft W swell that’s just messy and dangerous.
Another promising window opens on Monday the 14th of September. At 20 ft from the WSW with a 14-second period, the energy is a massive 12464 (strong to very strong). The wind is a fresh cross-shore from the SSW, so it’s lumpy, but for experienced chargers, that much energy and size on the reef is a big draw. It’s marginal, but it’s a big wave day.
There's a glassy gem on Tuesday the 15th of September morning. The wind drops to glass from the NE, and it’s an 12 ft SW swell with 4012 energy. Excellent conditions for experienced surfers again. That early morning stillness will make it magic, but watch for the wind changing to a cross-onshore in the afternoon.
The last week sees a few more clean days, but nothing that jumps out as a standout. The second week gets more uncertain, but that Tuesday the 8th and Monday the 14th are the ones to lock in.
Keep your wits about you, this is a heavy reef for experts only. The swell will be powerful.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Sat morning. Very mild (max 17°C on Sat afternoon, min 10°C on Sun night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Tue afternoon, min 10°C on Mon morning). Winds increasing (light winds from the SE on Tue afternoon, fresh winds from the ENE by Wed morning). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | SW 11 | SW 12 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 16 | WSW 17 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | SW 14 | WSW 14 |
Wave Graph | |||||||||||||||||||||
8153 | 8747 | 7420 | 4533 | 2801 | 5252 | 5334 | 3919 | 9585 | 6307 | 5526 | 5696 | 8167 | 8267 | 6330 | 4580 | 3800 | 2585 | 1644 | 1231 | 1240 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | off | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:50AM0.67m | 5:36AM0.70m | 6:47AM0.73m | 7:44AM0.73m | 8:33AM0.71m | 00:03AM0.36m | 9:18AM0.66m | 11:01PM0.38m | |||||||||||||
Low Tide | 2:16PM0.05m | 2:49PM0.00m | 3:24PM-0.02m | 3:58PM-0.01m | 4:29PM0.03m | 4:54PM0.10m | 1:33AM0.36m | 5:08PM0.18m | 3:04AM0.32m | ||||||||||||
6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | |
— | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | |
mm | — | — | — | 2 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 14 | 16 | 17 | 15 | 15 | 15 | 12 | 13 | 18 | 13 | 15 | 20 | 17 | 15 | 20 | 19 | 16 | 18 | 18 |
Feels °C | 5 | 7 | 9 | 10 | 13 | 10 | 7 | 7 | 6 | 9 | 13 | 8 | 10 | 18 | 14 | 9 | 18 | 15 | 11 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 22 | SW 12 | SW 13 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 16 | WSW 17 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | SW 14 | WSW 14 |
8153 | 8747 | 7420 | 4533 | 2801 | 46 | 5334 | 3919 | 9585 | 6307 | 5526 | 5696 | 8167 | 8267 | 6330 | 4580 | 3800 | 2585 | 1644 | 1231 | 1240 | |
Swell 2 Height (m) Direction Period (s) | WSW 21 | W 18 | — | — | S 11 | — | WSW 20 | WSW 17 | SSE 8 | — | — | — | — | — | — | — | NNE 5 | WSW 26 | SW 24 | SW 22 | WSW 22 |
90 | 785 | — | — | 345 | — | 664 | 3580 | 120 | — | — | — | — | — | — | — | 14 | 65 | 142 | 233 | 308 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 26 | — | — | SW 22 | SSW 12 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 | — | — | 231 | 78 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SW 11 | S 9 | — | — | — | — | — | — | SSE 4 | SE 6 | NE 5 | — | NE 4 | NNE 5 | N 6 | — |
— | — | — | — | — | 5252 | 694 | — | — | — | — | — | — | 39 | 31 | 25 | — | 26 | 98 | 38 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2168 | 15 | 213 | 213 | 231 | 414 | 1688 | 74 | 3 | 0 | 3 | 3 | 3 | 0 | 0 | 15 | 0 | 20 | 61 | 0 | 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.










