Surf Forecasts:
The Window surf forecast from 2 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 15ft (4.5m), 17s period, SW swell with offshore winds.
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 15ft (4.5m), 17s period, SW swell with 13,052 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 15ft (4.5m), 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 4.5m 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 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Sep 09) at 2PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 15ft (4.5m) 17s |
| Best Surf | 2AM (Mon 7th Sep) | 15ft (4.5m) 17s |
| Most Powerful | 8PM (Sun 6th Sep) | 15ft (4.5m) 17s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Right, grab a coffee mate – let’s talk about The Window. It’s a reef break that needs a pretty specific direction and, honestly, for the next week or so, we’re going to be fighting the wind. That doesn’t mean there’s nothing to get excited about, but you’re going to have to pick your moments.
The long-term picture actually has some serious muscle behind it. There’s a heap of energy in the water, but the problem right now is that it’s arriving with a lot of cross-onshore wind, which is smashing up what could be a decent wave. Don’t get too excited about the huge numbers you’ll see on the forecast – raw energy means nothing if the surface is chopped to bits.
Here’s how it rolls out. We start off on Wednesday the 2nd with a solid 12 ft SW groundswell at 13 seconds, but a 16 mph SW wind puts it on the cross. It’s a write-off. The same story follows through Thursday and Friday – there’s 16 ft waves on Friday, but again, the wind is ruining it. The water temp is sitting at 65°, which feels a touch warmer than normal for the start of September.
Now, the first real sign of life appears on Friday afternoon. We get the same big 16 ft WSW swell dropping to a clean 15 second period with a lighter 9 mph WSW breeze. It’s still cross-onshore, but the drop in wind speed makes it a “gentle cross-onshore and fairly choppy” situation. The score is finally in the positive range, so this is your early play if you’re desperate – it’s a “questionable tide” call, but the energy is there.
Saturday and Sunday are a mess again with strong winds and messy conditions.
Then, bingo. The standout for the whole run is shaping up to be Tuesday morning, September 8th. That’s a week away, so keep an eye on the updates, but the forecast is screaming at me. You’ve got a 13 ft WSW groundswell with a 16-second period, a solid groundswell that will wrap in nicely here. And the wind? 6 mph from the ESE. That’s offshore and clean. The conditions are called “exceptional for expert surfers” and the energy is still massive. The water will be clean, glassy, and powerful. This is the one to point your board at. It’s an advanced break anyway (The Window is a reef), so expect a heavy, fast wave. The dawn patrol on that Tuesday is going to be worth the early alarm.
The second week gets interesting again on Thursday the 17th of September. We’ve got another 13 ft WSW groundswell (17-second period) and the wind goes totally glassy – 3 mph SW, dead calm. That’s about as perfect as it gets for an expert reef break. The energy is huge and the forecast says “exceptional for expert surfers”. Keep that date in your mind, but remember it’s two weeks out so treat it as a promising rumour.
One big caveat for the end of the run: on Tuesday the 15th of September, the swell is predicted to hit a massive 25 ft to 26 ft. The forecast literally says the swell is too big for this spot, even with favourable wind. That’s a legit “don’t even think about paddling out” situation unless you’re a tow crew with a death wish. The energy reads a stupid huge number. That’s “big wave warning” territory, not a fun surf.
Summary: The Window is a moody mistress. For the coming days, you’ll be watching the wind more than the swell. The real gems are Tuesday morning the 8th and Thursday the 17th. If you’re an expert looking for a clean, powerful reef wave, circle those days. Everything else is a battle with the breeze.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed morning. Very mild (max 16°C on Wed morning, min 14°C on Thu night). Winds increasing (calm on Wed night, strong winds from the W by Thu night). | Days 4-6 Weather SummaryModerate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 16°C on Sat morning, min 11°C on Sun night). Winds decreasing (near gales from the S on Sat night, light winds from the SE by Mon morning). | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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 13 | SW 13 | SW 14 | SW 15 | SW 14 | WSW 10 | WSW 13 | WSW 15 | WSW 14 | WSW 14 | SW 10 | SW 12 | SW 13 | WSW 17 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 16 | WSW 16 | WSW 16 |
Wave Graph | |||||||||||||||||||||
3971 | 3984 | 4943 | 5973 | 4334 | 4937 | 9196 | 11909 | 7161 | 4163 | 4520 | 7617 | 6607 | 6353 | 10360 | 7034 | 5722 | 5293 | 7726 | 7238 | 5991 | |
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 | on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross-off | off | cross | cross | cross-off | off | cross-on | off |
High Tide | 00:24AM0.64m | 1:24AM0.66m | 3:50AM0.67m | 5:36AM0.70m | 6:47AM0.73m | 7:44AM0.73m | |||||||||||||||
Low Tide | 1:45PM0.22m | 1:47PM0.13m | 2:16PM0.05m | 2:49PM0.00m | 3:24PM-0.02m | 3:58PM-0.01m | 4:29PM0.03m | ||||||||||||||
6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | |
— | 6:01 | — | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | |
mm | 1 | — | — | — | — | 3 | — | — | — | 2 | 11 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 16 | 16 | 16 | 15 | 14 | 15 | 16 | 13 | 13 | 15 | 15 | 13 | 12 | 16 | 14 | 15 | 18 | 18 |
Feels °C | 11 | 11 | 12 | 11 | 8 | 8 | 8 | 9 | 10 | 8 | 5 | 1 | 8 | 8 | 9 | 9 | 11 | 10 | 13 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 14 | SW 15 | SW 14 | — | WSW 13 | WSW 15 | WSW 14 | WSW 14 | — | WSW 22 | SW 13 | SW 12 | SW 17 | SW 16 | SW 16 | SW 15 | WSW 16 | WSW 16 | WSW 16 |
3971 | 3984 | 4943 | 5973 | 4334 | — | 9196 | 11909 | 7161 | 4163 | — | 47 | 6607 | 3527 | 10360 | 7034 | 5722 | 5293 | 7726 | 7238 | 5991 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 17 | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 6353 | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | W 6 | WSW 10 | — | — | — | NW 6 | SW 10 | SW 12 | — | — | — | — | — | — | — | — | — |
— | — | — | — | 239 | 4937 | — | — | — | 219 | 4520 | 7617 | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1322 | 19 | 15 | 213 | 260 | 671 | 2010 | 15 | 213 | 213 | 2770 | 1688 | 78 | 78 | 0 | 3 | 19 | 3 | 0 | 3 | 14 |
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.











