
Surf Forecasts:
The Window surf forecast from 13 Sep 2026:
- Best quality surf: Monday 14 Sep, 2PM (local time) - 11ft (3.5m), 14s period, SW swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 5PM (local time) - 11ft (3.5m), 16s period, SW swell with 6,378 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 2PM (local time) - 11ft (3.5m), 14s 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 14) at 2PM. The primary swell is predicted to be 3.5m and 14s 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 3.5m 16s and forecast to arrive on Sunday (Sep 20) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 6s period and expected on Thursday (Sep 17) at 11PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Mon 14th Sep) | 11ft (3.5m) 14s |
| Best Surf | 2PM (Mon 14th Sep) | 11ft (3.5m) 14s |
| Most Powerful | 5PM (Sun 20th Sep) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Righto, let’s get into it. Over the next 16 days, The Window is your one and only spot in this region, and it’s a ripper of a reef setup that doesn’t fire every day but knows how to put on a show when it does.
Right off the bat, Monday the 14th and Tuesday the 15th have solid swell rolling in. Monday morning kicks off with a solid 12 feet from the WSW, with a 14-second period. The wind is a cross-off from the ESE at 12 mph, keeping things reasonably clean, but the combined energy is already pumping at 4686 – that’s a lot of power. It’s a bit marginal for tide, though, and this kind of size at The Window is advanced-only; beginners should stay on the sand. Tuesday morning the 15th is a true standout in this first week: you’ve got 10 feet of SW groundswell, a long 14-second period, and clean offshore wind from the east at just 9 mph. Water temps are about average for this time of year – nothing weird there – and the energy reading is 3665, which is still strong. This is excellent surf for experienced crew. The wind will be glassy offshore early, making for some real clean lines.
Wednesday the 16th drops off a bit – swell drops to 6 feet, energy down around 1299, and the wind swings cross-off from the NE, 16 mph. Still surfable, but nothing special. Thursday the 17th gets messy with that NNW wind, and from the afternoon the quality slides into poor, with cross-onshore junk. Friday the 18th sees the swell build back to 7 feet and then 8 feet, but the wind goes wild with a risk of thunderstorms – strong cross-off in the morning, then a fresh cross-onshore in the afternoon making it lumpy. Poor surf. Saturday the 19th is even worse: onshore wind from the WSW at 19 mph, 12 to 13 feet of messy, blown-out swell. Energy is huge at 5343 and 5538, but the wind is straight onshore. That’s kite-surfing territory, not for paddle.
Sunday the 20th the swell is still solid at 12 feet, but the wind is cross to cross-on, so it’s choppy. Not the best. From Monday the 21st through Tuesday the 22nd, it’s all cross-onshore junk and dropping quality. A gap of a few days here with no good surf.
Then the real gold shows up. Wednesday morning the 23rd is a beauty: 10 feet of SW swell, 14-second period, light SE breeze at 6 mph giving you cross-off, clean conditions. Combined energy is 3949 – strong, but the wind makes it silky. That’s excellent surf for experienced surfers. But the true standout of the whole outlook lands on Saturday the 26th of September. I’m talking a massive 13 feet of SW groundswell with a ridiculous 20-second period. That’s very long-period, proper groundswell – it’ll peel beautifully down The Window’s reef. The energy reading is a beastly 13010. Wind is cross-off from the ESE at 12 mph, keeping it clean. This is big, powerful, and only for the brave. The afternoon stays solid at 13 feet with an 18-second period and 11058 energy. This one is almost two weeks out, so treat it as a promising long-range call, but if it lines up, it’s the session of the window.
Sunday the 27th and Monday the 28th still have solid 10 feet swell with 16 to 18-second periods and offshore or cross-off winds – clean and good for experts. The window closes on Tuesday the 29th with onshore wind again. So, if you’re in the region, circle the 15th and that massive 26th – those are your best shots. The Window can get crowded sometimes, especially on the standouts, so get there early.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Wed afternoon, min 10°C on Mon night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Fri afternoon. Warm (max 22°C on Wed night, min 11°C on Fri night). Winds increasing (light winds from the ENE on Wed night, gales from the SW by Fri night). | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 16 | WSW 16 | WSW 16 | WSW 14 | SW 13 | SW 13 |
Wave Graph | |||||||||||||||||||
5046 | 4686 | 4838 | 4370 | 3665 | 3148 | 2252 | 1299 | 721 | 1016 | 902 | 756 | 759 | 2343 | 3652 | 5205 | 5343 | 5538 | 3502 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | off | off | cross | off | cross-off | cross | cross-off | cross | cross-on | cross | cross-off | cross-on | cross-on | on | on | cross-on |
High Tide | 10:37PM0.56m | 10:32AM0.32m | 10:42PM0.61m | 10:55PM0.64m | 11:15PM0.65m | 11:43PM0.64m | 00:21AM0.61m | 1:35AM0.58m | |||||||||||
Low Tide | 6:09AM0.29m | 2:41PM0.29m | 1:41PM0.24m | 1:39PM0.18m | 2:00PM0.14m | 2:23PM0.12m | 2:46PM0.11m | 2:32AM0.58m | |||||||||||
— | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | |
6:08 | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 9 | 12 | — | — | 1 |
Temp °C | 17 | 14 | 17 | 16 | 15 | 21 | 20 | 20 | 22 | 22 | 19 | 19 | 18 | 18 | 19 | 14 | 15 | 16 | 16 |
Feels °C | 14 | 11 | 15 | 12 | 12 | 20 | 17 | 16 | 20 | 21 | 17 | 17 | 14 | 14 | 13 | 5 | 7 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | WSW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 12 | WSW 16 | WSW 16 | WSW 16 | WSW 14 | SW 13 | SW 13 |
5046 | 4686 | 4838 | 4370 | 3665 | 3148 | 2252 | 1299 | 721 | 1016 | 902 | 756 | 759 | 2343 | 3652 | 5205 | 5343 | 5538 | 3502 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 16 | WSW 21 | SSW 11 | SW 18 | SW 18 | — | WNW 9 | — | — | — | — |
— | — | — | — | — | — | — | — | 353 | 42 | 38 | 161 | 323 | — | 381 | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 22 | WSW 20 | WSW 20 | S 11 | S 10 | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | 18 | 40 | 39 | 20 | 8 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | S 4 | — | NE 4 | NNE 5 | NNE 3 | N 4 | NNW 5 | NW 7 | W 8 | SSW 5 | — | — | — | — |
— | — | — | — | — | 13 | — | 21 | 7 | 8 | 24 | 80 | 404 | 747 | 49 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 3 | 3 | 14 | 0 | 3 | 0 | 10 | 2 | 2 | 69 | 260 | 69 | 42 | 19 | 260 | 2008 | 1941 | 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.










