The Window surfForecast / WA – Margaret River / Australia

information circle16 Day Weather and Surf, issued 7 am Wednesday 18 Mar 2026 AWST
Forecast update in hr  min  s Forecast update imminent
The Window surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's The Window sea temperature is
20.5° C
(Which is slightly cooler than normal)

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 Thursday (Mar 19) at 2AM. The primary swell is predicted to be 1.6m and 12s period with a secondary swell of 0.6m and 4s. 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 2.5m 16s and forecast to arrive on Friday (Mar 20) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Sunday (Mar 22) at 5PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 19th Mar)5ft (1.6m) 12s
Best Surf11AM (Fri 20th Mar)7ft (2.1m) 13s
Most Powerful 5PM (Fri 20th Mar)8ft (2.5m) 16s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 27°C on Thu afternoon, min 17°C on Thu night). Mainly fresh winds.

Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Mon afternoon, min 14°C on Mon night). Winds decreasing (fresh winds from the SSE on Sat night, light winds from the SE by Mon morning).

Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
2
0
3
2
2
3
4
1
3
1
0
2
2
0
3
3
2
2
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.6
SW
1.6
SW
1.6
SW
2.2
SW
2.3
SW
2.1
SW
2.1
SW
2.5
SW
2.5
SW
2.1
SW
2
SW
2
SW
2
SW
1.8
SW
3
SSW
2.1
SW
1.8
SW
1.8
SW
1.6
SW
1.3
SW
1.4
SW
Period(s) (?)121212151414131614131314131313131212121211
Wave
Graph
(?)Metric surfscale
Energy kJ (?)70668372320552247152714603531272515681387151413261144305413521025899736478501
Wind
(km/h)
20
N
20
SSW
15
SE
20
S
30
SSE
20
SE
15
SSE
30
S
20
SE
30
S
35
S
25
SE
25
SSE
40
SSE
30
SE
15
SE
30
SSE
20
SE
30
S
40
SSE
30
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
on
cross-
off
crosscross-
off
cross-
off
cross-
off
crosscross-
off
crosscrosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
High Tide
/ height (m)
10:30AM
0.43
9:56PM
0.58
10:28AM
0.48
10:44PM
0.49
10:33AM
0.55
11:44PM
0.39
10:44AM
0.62
11:00AM
0.67
11:24AM
0.71
11:55AM
0.71
Low Tide
/ height (m)
3:25PM
0.29
4:30AM
0.25
4:26PM
0.25
4:21AM
0.31
5:32PM
0.23
3:47AM
0.34
6:55PM
0.21
11:06PM
0.17
12:39AM
0.09
1:31AM
0.03
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Sunrise6:20--6:20--6:22--6:22--6:24--6:24--6:24--
Sunset-6:35--6:32--6:31--6:30--6:29--6:28--6:27-
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C262522262718252618232417222518222618212115
Feels °C (?)23232023231424241520191118191219231416148
  • 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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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our The Window surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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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