
Surf Forecasts:
The Window surf forecast from 11 Sep 2026:
- Best quality surf: Monday 14 Sep, 2PM (local time) - 11ft (3.5m), 14s period, SW swell with glassy winds.
- Most powerful swell: Saturday 19 Sep, 2AM (local time) - 15ft (4.5m), 16s period, WSW swell with 9,506 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 glassy as the swell arrives.
The most powerful waves expected at The Window in the next 16 days are 4.5m 16s and forecast to arrive on Saturday (Sep 19) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Wednesday (Sep 16) at 8AM.
| 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 | 2AM (Sat 19th Sep) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for The Window over the next 16 days.
The Lowdown
G’day, it’s Rusty.
Right, let’s be straight with you. The next stretch is a bit of a mixed bag. We’ve got a heap of energy heading our way, but the wind is going to mess with a lot of it. The first real window of opportunity doesn't appear until Monday the 14th of September, and even then, it’s not perfect. Before that, Saturday and Sunday are pretty much a write-off—we’ve got a rising swell but it’s coming in with onshore winds, making for poor surf conditions. You’d be fighting a losing battle.
The standout period looks to be around Tuesday the 15th of September. We’ve got a solid 9.8ft SW swell with a 14-second period, which is proper groundswell, and the morning has that glassy, offshore ENE wind. The Window (Hawaii) is a reef break and this is where that long-period swell really shines. The energy is strong, with a combined energy reading of 3483, and the conditions are rated as excellent for experienced surfers. This is the one to circle on the calendar. The afternoon on Tuesday drops off a bit as the wind swings, but the morning session is the pick of the whole run.
Following that, we ease off. The swell drops through Wednesday the 16th and Thursday the 17th, down to the 4.3ft to 5.6ft range. The wind is more cross and cross-on, so it’s not going to be as clean. It’s a bit of a letdown after that Tuesday morning, but there’s still some rideable waves if you’re keen.
Then it gets messy. Friday the 18th we’ve got gale-force onshore winds hammering us. That’s a complete blowout, don’t even bother. That kicks off a run of big, stormy surf that’s going to be well overhead and mostly messy. Saturday the 19th sees a huge 18ft SW swell, but it’s crossed up. Saturday afternoon cleans up a little, with a 14.8ft swell and cross-off winds, giving it a score of 5, and that might be one for the more experienced crew looking for a challenge, but it’s still not what I’d call a casual surf.
The following days are a mix of clean windows ruined by cross-onshore winds. Monday the 21st is big and bumpy. There is another standout, though. Tuesday the 22nd of September morning is looking prime again. A hefty 13.1ft SW swell, 15-second period, and the wind is light and offshore from the east. That’s another excellent condition call for experienced surfers. The energy will be strong, in the 6599 range. That’s a big day and a half.
After that, we wind down into the second week. The swell drops back to the 8.2ft to 9.8ft range but the winds are mostly onshore or cross-onshore, so it’s less appealing. There’s a run of not-so-great conditions from Wednesday the 23rd through to Friday the 25th, with the wind messing things up. Saturday the 26th sees a jump back up to 13.1ft, but with a shorter 10-second period and a cross-on wind, it loses its shape. Sunday the 27th has another 13.1ft of SW swell with a long 15-second period, but a fresh cross-shore wind will make it lumpy.
So, to sum it up: the two clear standouts are the mornings of Tuesday the 15th and Tuesday the 22nd of September. The first is the more user-friendly size, the second is a proper big-wave session. Both are for experienced surfers, and both are when The Window will be at its best. Everything else in between is either blowy, messy, or just not as good.
Short Range ForecastLight rain (total 5mm), mostly falling on Fri night. Very mild (max 18°C on Fri night, min 12°C on Mon morning). Winds decreasing (strong winds from the WNW on Fri night, calm by Mon afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Wed afternoon, min 10°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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 17 | WSW 10 | WSW 10 | WSW 14 | WSW 13 | WSW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 12 |
Wave Graph | |||||||||||||||||||
6704 | 2028 | 1765 | 3446 | 2508 | 4704 | 5181 | 5140 | 5069 | 4163 | 3483 | 3104 | 2056 | 1133 | 591 | 1031 | 969 | 936 | 1649 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | cross-on | on | cross-off | cross-off | cross-off | off | off | cross | off | cross-off | cross | cross-off | cross-on | cross | cross |
High Tide | 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 | 11:43PM0.64m | |||||||||
Low Tide | 4:06AM0.30m | 4:22PM0.32m | 5:04AM0.29m | 3:33PM0.33m | 6:09AM0.29m | 2:41PM0.29m | 1:41PM0.24m | 1:39PM0.18m | 2:00PM0.14m | ||||||||||
— | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | |
6:07 | — | 6:08 | — | — | 6:08 | — | — | 6:09 | — | — | 6:10 | — | — | 6:10 | — | — | 6:12 | — | |
mm | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 |
Temp °C | 18 | 15 | 16 | 16 | 16 | 17 | 17 | 14 | 17 | 16 | 17 | 20 | 19 | 20 | 22 | 21 | 18 | 19 | 18 |
Feels °C | 14 | 6 | 10 | 10 | 11 | 12 | 13 | 11 | 16 | 12 | 14 | 19 | 15 | 16 | 19 | 21 | 19 | 18 | 15 |
Swell 1 Height (m) Direction Period (s) | — | WSW 16 | WSW 15 | WSW 14 | WSW 13 | WSW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | WSW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 12 |
— | 2028 | 1642 | 3446 | 2508 | 4704 | 5181 | 5140 | 5069 | 4163 | 3483 | 3104 | 2056 | 1133 | 591 | 1031 | 969 | 936 | 1649 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 18 | WSW 17 | — | — | — | — | — | — | — | SSE 8 | — | WSW 16 | WSW 21 | SSW 12 | SW 18 | WSW 15 |
— | — | — | 160 | 913 | — | — | — | — | — | — | — | 6 | — | 314 | 43 | 45 | 252 | 863 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 22 | WSW 21 | WSW 20 | S 11 | N 6 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 18 | 42 | 39 | 9 | 16 | |
Wind waves Height (m) Direction Period (s) | W 17 | WSW 10 | WSW 10 | — | — | — | — | — | — | E 4 | ENE 5 | — | NE 4 | NNE 5 | N 5 | NNW 4 | NNW 4 | NW 6 | — |
6704 | 1955 | 1765 | — | — | — | — | — | — | 18 | 16 | — | 27 | 90 | 47 | 15 | 32 | 169 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 260 | 858 | 1798 | 196 | 363 | 363 | 3 | 3 | 3 | 24 | 0 | 3 | 0 | 21 | 55 | 0 | 69 | 69 | 171 |
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.










