
Surf Forecasts:
The Window surf forecast from 14 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 8AM (local time) - 10ft (3.0m), 14s period, WSW swell with offshore winds.
- Most powerful swell: Saturday 19 Sep, 5AM (local time) - 13ft (4.0m), 14s period, WSW swell with 6,871 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 8AM (local time) - 10ft (3.0m), 14s 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 Tuesday (Sep 15) at 8AM. The primary swell is predicted to be 3.0m and 14s period with a secondary swell of 0.4m and 19s. 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 4.0m 14s and forecast to arrive on Saturday (Sep 19) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 6s period and expected on Thursday (Sep 17) at 11PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 15th Sep) | 10ft (3.0m) 14s |
| Best Surf | 8AM (Tue 15th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 5AM (Sat 19th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what The Window has got cooking for us over the next couple of weeks. We've got a solid run of swell on the way, but the wind is going to be the real story here, making for a tricky puzzle to solve. Most of the time, it's going to be too big and blown out for a comfortable session, so you've got to pick your moments.
Straight off the bat, Tuesday morning the 15th looks like the standout. We’re looking at a powerful 10ft SW groundswell with a long 14-second period, pumping a massive 3665 (moderate-to-strong energy) into the reef. The magic ingredient is a gentle 9 mph offshore breeze from the ENE, which will keep the face of those waves clean and lined up for the crew who know what they’re doing. This is advanced territory at this size, but for an experienced surfer, this is the one to circle on the calendar. The water temp is about average for the time of year.
Things get messy after that. Wednesday afternoon the 16th offers a brief moment of calm with glassy conditions and a clean 5ft SW swell, but the energy is much weaker at 1097. It's a nice little window for a mellower session if you can get out.
From Thursday the 17th through the end of the third week of September, it's a bit of a wild scene. The swell keeps coming in, often pushing 8ft to 15ft with strong energy readings hitting four digits, but the wind is all over the place – mostly onshore, cross-onshore, or strong cross-shore breezes. It’s going to be lumpy, choppy, and not much fun for a paddle. The 8ft swell on Friday morning the 18th is clean, but with a 31 mph near gale blowing, that’s more of a kite-surfing scenario than a paddle session. A lot of these days are going to be blown out or just too big and messy.
Now, looking further out, the first few days of the last week of September get interesting again, but it's a big call. Friday the 25th is a beast, with a massive 18ft SW groundswell arriving with an 18-second period. The combined energy reading is a staggering 20093 – that’s very strong. It’s clean with a cross-offshore breeze, but that’s a heavy, heavy swell. The data says it might be too big even for this spot, so this is for the absolute top-tier experts only, and even then, you’d want to be very careful. The forecast is less certain this far out, but the potential is there for something truly special for the brave.
Sunday the 27th morning offers another small window of hope with glassy conditions and a 6ft SW swell, which could be a nice, clean session after all that chaos.
So, to wrap it up: the standout is Tuesday morning the 15th for a proper, clean, powerful reef session. After that, pick your battles carefully through the wind and size. The very end of the month looks wild, but keep your expectations in check for now.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Wed afternoon, min 10°C on Mon night). Winds increasing (calm on Wed afternoon, fresh winds from the NNW by Thu afternoon). | Days 5-7 Weather SummaryHeavy rain (total 30mm), heaviest during Fri night. Warm (max 20°C on Fri morning, min 13°C on Fri night). Winds decreasing (near gales from the NNE on Fri morning, light winds from the WNW by Sun morning). | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 12 | W 12 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 14 | SW 15 |
Wave Graph | |||||||||||||||||||
4370 | 3665 | 3280 | 2252 | 1387 | 721 | 1109 | 802 | 615 | 843 | 1934 | 1739 | 6251 | 5286 | 3616 | 1965 | 1435 | 2765 | 4334 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross | off | cross-off | glassy | cross-off | cross | cross | cross | cross-off | cross-off | cross-on | on | on | on | cross-on | cross-on | cross |
High Tide | 10:42PM0.61m | 10:55PM0.64m | 11:15PM0.65m | 11:43PM0.64m | 00:21AM0.61m | 1:35AM0.58m | |||||||||||||
Low Tide | 1:41PM0.24m | 1:39PM0.18m | 2:00PM0.14m | 2:23PM0.12m | 2:46PM0.11m | 2:32AM0.58m | 3:06PM0.10m | ||||||||||||
— | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | |
6:09 | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 24 | — | — | 1 | 2 | — | — |
Temp °C | 16 | 17 | 20 | 21 | 20 | 24 | 22 | 19 | 19 | 18 | 20 | 16 | 14 | 15 | 16 | 17 | 16 | 17 | 17 |
Feels °C | 12 | 14 | 19 | 18 | 16 | 24 | 22 | 18 | 16 | 13 | 12 | 9 | 7 | 6 | 11 | 14 | 13 | 14 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 17 | WSW 16 | — | WSW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 14 | SW 15 |
4370 | 3665 | 3280 | 2252 | 1387 | 721 | 1109 | 802 | 615 | 843 | 1044 | 1739 | — | 5286 | 3616 | 1965 | 1435 | 2765 | 4334 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SE 7 | W 23 | SW 16 | WSW 20 | S 11 | WSW 18 | WSW 19 | WSW 17 | NW 8 | — | — | — | — | SW 16 | — | — |
— | — | — | 8 | 11 | 358 | 41 | 61 | 211 | 241 | 1607 | 262 | — | — | — | — | 96 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 22 | WSW 21 | WSW 20 | S 11 | SW 16 | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | 18 | 42 | 39 | 20 | 483 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 4 | NNE 4 | NNE 4 | N 4 | NW 5 | NW 7 | W 12 | WSW 11 | WSW 15 | — | — | — | — | — | — |
— | — | — | — | 16 | 4 | 11 | 16 | 91 | 527 | 1934 | 1114 | 6251 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 0 | 3 | 0 | 11 | 0 | 61 | 213 | 213 | 69 | 171 | 363 | 659 | 1322 | 1798 | 231 | 15 | 61 | 74 |
Best forecast wave conditions in Margaret River | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










