
Surf Forecasts:
The Window surf forecast from 17 Jul 2026:
- Best quality surf: Saturday 18 Jul, 2PM (local time) - 18ft (5.5m), 16s period, WSW swell with onshore winds.
- Most powerful swell: Saturday 18 Jul, 2PM (local time) - 18ft (5.5m), 16s period, WSW swell with 14,195 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 2PM (local time) - 18ft (5.5m), 16s 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 Saturday (Jul 18) at 2PM. The primary swell is predicted to be 5.5m and 16s period with a secondary swell of 5.0m and 13s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at The Window in the next 16 days are 5.5m 16s and forecast to arrive on Saturday (Jul 18) at 2PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Sat 18th Jul) | 18ft (5.5m) 16s |
| Best Surf | 2PM (Sat 18th Jul) | 18ft (5.5m) 16s |
| Most Powerful | 2PM (Sat 18th Jul) | 18ft (5.5m) 16s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what's coming up at The Window. We've got a mixed bag over the next couple of weeks, but there are some absolute gems if you're willing to be patient.
The first few days are a right-off, I'm not gonna lie. The swell is pumping, but the wind is howling onshore, mostly from the west, so it's just messy. You'll see solid 16 ft swell on the 18th, but with 25 mph winds, it's a washing machine. That massive energy (9038) is just wasted. We get a bit of a breather on the 19th and 20th, but it's still cross-onshore, and the conditions are just marginal at best. It's a tough start.
Then, hold onto your board. Wednesday the 22nd is where it all comes together. The wind drops to a glassy 3 mph from the west, and we've got a solid 10 ft SW groundswell with a 13-second period. The energy is strong (2639), and the water's about average for the time of year. This is classic reef-grinding territory, and it's going to be firing. The glassy conditions will make it look like a mirror. This is a standout day for the advanced crew.
The good times roll into Thursday the 23rd morning. We get a nice cross-offshore breeze from the NNE, keeping the 8 ft SW swell (14-second period) clean and lined up. The energy is solid (2191), and it's another excellent session for those who know the reef.
The wind goes a bit funky again for a few days after that, but Sunday the 26th is another cracker. We've got a clean 7 ft SW swell, but the period is a massive 18 seconds. That's proper groundswell energy (3252), and with a light SSE cross-offshore wind, it's just beautiful. The long period will give you some real push and make the paddle out a breeze, but it might be a bit straight for the beachies – perfect for a reef like The Window.
If you're looking that far ahead, mark your calendar for Wednesday the 29th of July. The forecast is showing a huge 16 ft SW swell with a 16-second period. The energy is off the charts (15138). The wind is a clean cross-offshore from the SSE, so it's going to be absolutely pumping. This is expert territory only – 16 ft is not for the faint of heart. It's a long-range call, so it's a bit of a promise, but it looks incredibly promising.
The Window has a few more good days after that, especially the 31st of July with a clean 8 ft WSW swell and a very long 18-second period, and the 2nd of August with a smaller but clean 6 ft SSW swell. The crowds can be a factor here sometimes, so get in early for the best ones.
Alright, stay stoked and I'll see you out there.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Fri night. Very mild (max 17°C on Fri night, min 14°C on Fri night). Winds decreasing (near gales from the WNW on Fri night, calm by Sun night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Mon night. Very mild (max 16°C on Mon night, min 13°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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) | W 13 | W 12 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | SW 13 | SW 11 | SW 14 | SW 13 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 13 | SW 13 |
Wave Graph | |||||||||||||||||||
6276 | 6689 | 11801 | 6428 | 3826 | 2860 | 2381 | 1427 | 2056 | 1952 | 2686 | 2283 | 2023 | 2561 | 2639 | 2855 | 2191 | 1619 | 1594 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross | cross | cross | glassy | glassy | glassy | cross-off | cross-on | glassy |
High Tide | 11:02AM0.56m | 9:40AM0.48m | 4:44AM0.45m | 8:19AM0.46m | 4:20AM0.51m | 4:44AM0.57m | 5:22AM0.61m | ||||||||||||
Low Tide | 8:54PM0.18m | 8:14PM0.27m | 6:29PM0.30m | 5:55AM0.45m | 5:25PM0.27m | 4:18PM0.21m | 4:05PM0.16m | 4:15PM0.12m | |||||||||||
— | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | |
5:30 | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:34 | — | |
mm | 7 | 3 | — | 1 | 2 | — | — | 1 | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 14 | 15 | 16 | 15 | 16 | 15 | 15 | 16 | 16 | 15 | 14 | 13 | 14 | 15 | 16 | 14 | 15 | 16 |
Feels °C | 11 | 4 | 6 | 9 | 10 | 12 | 12 | 11 | 10 | 11 | 12 | 10 | 10 | 13 | 14 | 15 | 12 | 13 | 16 |
Swell 1 Height (m) Direction Period (s) | — | WSW 17 | WSW 16 | WSW 15 | WSW 14 | WSW 13 | SW 13 | SW 11 | SW 14 | SW 13 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | SW 13 | SW 13 |
— | 2349 | 11801 | 6428 | 3826 | 2860 | 2381 | 1427 | 2056 | 1952 | 2686 | 2283 | 2023 | 2561 | 2639 | 2855 | 2191 | 1619 | 1594 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | SSW 12 | SW 16 | — | — | — | SW 18 | — | — | — | — | — | W 18 | — |
— | — | — | — | — | — | 573 | 90 | — | — | — | 12 | — | — | — | — | — | 25 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | W 13 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6276 | 6689 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 260 | 1688 | 260 | 260 | 15 | 15 | 3 | 19 | 143 | 15 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 11 | 0 |
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.










