The Window Surf Break

Lat Long: 33.72° S 114.98° E

The Window Surf Forecast and Surf Report

Issued: 7 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's The Window sea temperature is
18.2°C
0.9° 

The Window surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


The Window surf forecast from 5 Sep 2026:

  • Best quality surf: Tuesday 8 Sep, 2PM (local time) - 13ft (4.0m), 16s period, WSW swell with offshore winds.
  • Most powerful swell: Sunday 6 Sep, 8PM (local time) - 13ft (4.0m), 17s period, SW swell with 10,478 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 11AM (local time) - 11ft (3.5m), 16s 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 07) at 11AM. The primary swell is predicted to be 3.5m and 16s period. 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 4.0m 17s and forecast to arrive on Sunday (Sep 06) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Thursday (Sep 10) at 8AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Mon 7th Sep)11ft (3.5m) 16s
Best Surf 2PM (Tue 8th Sep)13ft (4.0m) 16s
Most Powerful 8PM (Sun 6th Sep)13ft (4.0m) 17s

Table - best surf conditions forecast for The Window over the next 16 days.


The Lowdown

G’day, Rusty here. Let’s chew the fat on what’s shaping up at The Window over the next fortnight. It’s a proper rollercoaster, with some massive groundswells coming through, but the wind is gonna be the deciding factor. The first few days are a write-off, but if you’re patient, there are some absolute diamonds in the rough.

We start off on Saturday the 5th and Sunday the 6th, and mate, it’s a total dud. Saturday has fresh cross-onshore wind and lumpy, terrible surf; the combined energy is moderate to strong (4439). Sunday cleans up a bit with a cross-offshore breeze, but the swell is messy and the conditions are still marginal because of the tide.

Now, Monday the 7th is where the magic starts. The morning session is a real standout. We’ve got a clean 12 ft swell from the SW with a very long period of 16 seconds—that’s proper groundswell, heaps of energy (6307), and those long lulls between sets will make paddling out a whole lot easier. The wind is a gentle cross-offshore breeze from the SE, so the face will be glassy. This is excellent for experienced surfers, but at 12 ft, it’s too big for beginners.

Tuesday the 8th is another cracker. The morning has a 13 ft SW swell with that same 16-second period, and the energy is pumping (8296). The wind is a moderate cross-offshore from the ESE, keeping things clean. But the real gem is Tuesday afternoon: a 12 ft swell from the WSW with a 16-second period, and the wind goes offshore from the ENE at just 6 mph. Glassy, clean, and exceptional for experts. This is the best on offer for the whole stretch.

The rest of the week into the weekend fades a bit. Wednesday the 9th still has some decent 10 ft swell with offshores in the afternoon, but the wind is stronger. By Thursday the 10th, the swell drops to 6 ft, and the wind turns cross-shore and messy. We then hit another rough patch from Saturday the 12th through Sunday the 13th, with onshore gales and lumpy, poor conditions, even though the swell is 12 ft to 15 ft. Just ugly.

Look ahead to Monday the 14th of September, and the swell is back up to 13 ft from the WSW with a 15-second period. The morning has a gentle cross-offshore breeze from the SSE, making it clean and exceptional for experts (7390 energy). Tuesday the 15th is also solid, with a 10 ft groundswell and a light offshore breeze in the afternoon from the WNW at just 3 mph, glassy and clean.

Then we see another highlight on Thursday the 17th of September. The afternoon session is worth noting: an 12 ft swell from the WSW with a 15-second period, and the wind goes glassy—totally calm. The energy is strong (4640), and it’s clean and excellent for experienced surfers.

But be warned, the end of the run gets wild. Saturday the 19th and Sunday the 20th see the swell pumping to 16 ft to 18 ft from the WSW with periods of 16-17 seconds. The energy is off the charts (over 14,000), but the wind is howling onshore from the west. At this size, it’s only for experts and the brave, and with that onshore wind, it’s going to be a washing machine. Honestly, for paddle surfing it’s a nightmare, but if you’re into kite surfing, this setup looks far more interesting.

The Window itself is a reef break, and with these long-period swells, it will handle the energy well, but crowds? Yeah, it says “sometimes,” so you might have to share the peak on the best days. The water temp is sitting at 65°F, which is about normal for this time of year.

Bottom line: Lock in Monday the 7th morning and Tuesday the 8th afternoon for the absolute best windows. The 14th and 17th are also strong, but with a long-range caveat. The rest is a mix of pain and potential.

Rusty.

Short Range Forecast

Light rain (total 8mm), mostly falling on Sat afternoon. Very mild (max 18°C on Mon afternoon, min 10°C on Sun night). Winds decreasing (fresh winds from the S on Sat night, light winds from the SE by Mon morning).

Days 4-6 Weather Summary

Mostly dry. Warm (max 20°C on Tue afternoon, min 10°C on Tue morning). Winds decreasing (fresh winds from the NE on Thu morning, calm by Thu night).

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
2
3
4
7
5
3
3
6
6
5
3
4
2
2
3
4
2
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
3.5
WSW
14
3
WSW
13
3
SW
10
3.5
WSW
12
3.5
SW
13
4
SW
17
3.5
SW
16
3.5
SW
16
3.5
SW
16
4
SW
16
3.5
WSW
16
3.5
WSW
16
3
WSW
16
3
WSW
15
2.5
WSW
15
1.9
SW
14
1.8
SW
14
1.8
WSW
15
1.3
WSW
20
1.9
WSW
18
2.2
WSW
17
Wave Graph
Metric surfscale
Energy kJ
4439
2614
2162
3287
3606
9471
6307
5268
6621
8296
6917
5848
4390
3581
2585
1512
1285
1409
1356
2449
2895
Wind (km/h)
30
NNW
30
WNW
35
SSE
30
SSE
35
SSE
20
SE
15
SE
30
SSE
25
SE
25
ESE
10
ENE
25
E
30
ENE
20
ENE
30
ENE
30
NE
15
N
5
ESE
15
NW
20
NW
45
W
Wind State
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
off
cross-off
cross-off
cross
glassy
cross-on
cross-on
on
High Tide
5:36AM0.70m
6:47AM0.73m
7:44AM0.73m
8:33AM0.71m
00:03AM0.36m
9:18AM0.66m
11:01PM0.38m
9:58AM0.58m
10:44PM0.43m
Low Tide
2:49PM0.00m
3:24PM-0.02m
3:58PM-0.01m
4:29PM0.03m
4:54PM0.10m
1:33AM0.36m
5:08PM0.18m
3:04AM0.32m
5:00PM0.27m
4:06AM0.30m
light rain
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
part cloud
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:31
6:31
6:30
6:28
6:26
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:04
6:05
6:05
6:06
6:07
6:07
6:07
 mm
2
3
3
12
Temp °C
16
16
15
15
16
12
14
18
13
15
20
16
15
18
17
15
18
17
18
18
17
Feels °C
10
10
10
7
8
5
11
14
7
10
16
11
9
13
12
9
16
16
16
15
13
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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