
Surf Forecasts:
The Window surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 8AM (local time) - 11ft (3.5m), 14s period, WSW swell with offshore winds.
- Most powerful swell: Monday 14 Sep, 2PM (local time) - 11ft (3.5m), 14s period, SW swell with 5,700 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 8PM (local time) - 6.5ft (2.0m), 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 (Sep 10) at 8PM. The primary swell is predicted to be 2.0m and 15s period with a secondary swell of 0.7m and 21s. 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 3.5m 14s and forecast to arrive on Monday (Sep 14) at 2PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Friday (Sep 11) at 11AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 10th Sep) | 6.5ft (2.0m) 15s |
| Best Surf | 8AM (Mon 14th Sep) | 11ft (3.5m) 14s |
| Most Powerful | 2PM (Mon 14th Sep) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
We’re looking at a solid stretch of surf ahead at The Window, but it’s gonna take a bit of patience to get to the real gold. The first few days are a bit of a write-off – messy winds and onshore junk keep things from shaping up. The real magic starts to show on Monday the 14th, and there’s a proper standout window later on that’s got my full attention.
The Window is a reef break, and it’s fairly consistent, so it’s got some reliability. The water temp is sitting around 64°, which is just about normal for this time of year, so nothing wild there.
We start off Thursday the 10th and Friday the 11th with bumpy conditions. Thursday morning has a 7 ft swell from the WSW, but a stiff 16 mph cross-offshore wind keeps it from being clean. The combined energy isn’t huge at 1745, and it’s a marginal call. Same story Friday: a 7 ft swell with 19 mph winds, energy bumping up to 2960, but still no good. The weekend is a total loss – Saturday the 12th and Sunday the 13th are onshore slop. Swell gets up to 12 ft on Saturday, but the wind is howling from the WSW and W, and the energy is high (5163 and 4369), but it’s all blown out. Surf quality is zero.
Now, Monday morning the 14th is the first real turn. We’ve got a 13 ft swell from the WSW, period 14 seconds – that’s a proper groundswell. The wind is a gentle offshore from the ESE at 9 mph, and the combined energy is a solid 5956. The conditions are excellent for experienced surfers. This is a big, powerful swell, so it’s definitely not for beginners. The Window handles it, but you’ll need your wits about you. The morning is the clear winner here; the afternoon gets a cross-on wind that chops it up.
Tuesday morning the 15th is another beauty. The swell drops to 10 ft, still from the WSW, and the wind is near glassy at 3 mph from the south, cross-off. Combined energy is 3924, and it’s clean as a whistle. This is a top-tier session for anyone with the skills.
We then hit a bit of a lull mid-week, with onshore winds returning Wednesday and Thursday the 16th and 17th. The swell stays around 7 ft to 8 ft, but the wind is messy. Thursday the 17th afternoon gets pounded by a 25 mph cross-wind, so that’s a hard pass.
Then things get interesting. Saturday the 19th is a stand-out, but there’s a catch. The morning shows a massive 23 ft swell from the west, with a 14-second period, and the combined energy is a monstrous 20357. The wind is light and onshore, which is a problem. The data says the swell is predicted to be too big for this break. This is expert territory only, and even then, it’s a straight-up survival mission. The afternoon drops to 18 ft, still huge, and the energy is 9935, but the wind is still onshore. It’s a spectacle, but not a session.
The best of the whole forecast shows up on Monday the 21st. The swell is 16 ft from the SW, period 16 seconds, and the combined energy is a massive 10966. The wind is a cross-shore from the SSW, which is not perfect, but it’s manageable. The morning is a bit better with a 15 ft swell and 10909 energy. This is a big, powerful, long-period swell that’s going to be lighting up the reef. The Window can handle it, and if you’re an expert, this is the one to circle on the calendar. It’s a real standout.
We wrap up the week with the 24th and 25th. Thursday the 24th morning is excellent again: a 10 ft SW swell at 16 seconds, with a gentle offshore cross-off from the SE at 9 mph. The energy is 4547, and it’s clean. A solid session for experienced surfers.
So, the best of the lot is Monday the 21st, with that massive, powerful SW groundswell and high energy, despite the cross-wind. The Monday morning the 14th and Tuesday morning the 15th are also excellent, clean windows for the more experienced crew. The Window delivers, but you’ve got to pick your moments.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Fri night. Very mild (max 18°C on Fri night, min 15°C on Thu night). Winds increasing (light winds from the N on Thu afternoon, strong winds from the WSW by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 21°C on Wed morning, min 11°C on Tue morning). Winds increasing (calm on Mon afternoon, fresh winds from the SSW by Tue afternoon). | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 15 | WSW 15 | WSW 14 | WSW 18 | WSW 17 | WSW 16 | WSW 11 | WSW 14 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | SW 14 | WSW 14 | SW 15 | SW 14 | SW 16 | SW 14 | WSW 14 |
Wave Graph | ||||||||||||||||||||
1488 | 1739 | 1556 | 4282 | 3697 | 2295 | 1706 | 1396 | 2440 | 3559 | 4762 | 5534 | 5534 | 4655 | 3924 | 3916 | 2534 | 2658 | 2032 | 1598 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross-on | on | on | on | on | on | cross-off | off | cross | off | cross-off | cross-off | off | cross-off | cross | cross |
High Tide | 11:01PM0.38m | 9:58AM0.58m | 10:44PM0.43m | 10:33AM0.49m | 10:37PM0.50m | 10:59AM0.40m | 10:37PM0.56m | 10:32AM0.32m | 10:42PM0.61m | 10:55PM0.64m | 11:15PM0.65m | |||||||||
Low Tide | 5:08PM0.18m | 3:04AM0.32m | 5:00PM0.27m | 4:06AM0.30m | 4:22PM0.32m | 5:04AM0.29m | 3:33PM0.33m | 6:09AM0.29m | 2:41PM0.29m | 1:41PM0.24m | 1:39PM0.18m | |||||||||
— | — | 6:26 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | |
6:07 | — | — | 6:07 | — | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | |
mm | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 16 | 16 | 17 | 18 | 16 | 15 | 16 | 17 | 17 | 17 | 15 | 18 | 16 | 18 | 19 | 19 | 21 | 22 | 18 |
Feels °C | 15 | 13 | 10 | 12 | 13 | 9 | 10 | 11 | 12 | 12 | 14 | 13 | 17 | 12 | 17 | 15 | 18 | 19 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 15 | WSW 14 | WSW 18 | WSW 17 | WSW 9 | WSW 11 | WSW 14 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | SW 14 | WSW 14 | SW 15 | SW 14 | SW 16 | SW 14 | WSW 14 |
1488 | 1739 | 1556 | 4282 | 3697 | 1094 | 1706 | 1396 | 2440 | 3559 | 4762 | 5534 | 5534 | 4655 | 3924 | 3916 | 2534 | 2658 | 2032 | 1598 | |
Swell 2 Height (m) Direction Period (s) | N 6 | SW 21 | WSW 19 | — | — | WSW 16 | WSW 15 | W 18 | WSW 17 | WSW 16 | — | — | — | — | — | — | — | — | — | WSW 20 |
41 | 450 | 1395 | — | — | 2295 | 1418 | 160 | 913 | 1005 | — | — | — | — | — | — | — | — | — | 41 | |
Swell 3 Height (m) Direction Period (s) | WSW 22 | — | S 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
308 | — | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | NNE 4 | N 6 | N 6 | NW 6 | — | — | WSW 10 | — | — | — | — | — | — | — | — | — | — | — | — |
— | 21 | 175 | 114 | 177 | — | — | 804 | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 61 | 2 | 2 | 69 | 69 | 231 | 363 | 363 | 213 | 363 | 363 | 3 | 0 | 3 | 0 | 0 | 19 | 0 | 3 | 15 |
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.










