Surf Forecasts:
Windy Harbour surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 8AM (local time) - 13ft (4.0m), 14s period, WSW swell with cross-shore winds.
- Most powerful swell: Wednesday 19 Aug, 5PM (local time) - 15ft (4.5m), 16s period, SW swell with 10,576 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 8AM (local time) - 13ft (4.0m), 14s period with WSW swell.
Best Forecast Surf Conditions for Windy Harbour this week:
The surf forecast for Windy Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 8AM. The primary swell is predicted to be 4.0m and 14s period with a secondary swell of 2.0m and 16s. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Windy Harbour in the next 16 days are 4.5m 16s and forecast to arrive on Wednesday (Aug 19) 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 1.1m 5s period and expected on Sunday (Aug 23) at 5AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 18th Aug) | 13ft (4.0m) 14s |
| Best Surf | 8AM (Tue 18th Aug) | 13ft (4.0m) 14s |
| Most Powerful | 5PM (Wed 19th Aug) | 15ft (4.5m) 16s |
Table - best surf conditions forecast for Windy Harbour over the next 16 days.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon night. Very mild (max 15°C on Tue night, min 13°C on Mon night). Winds decreasing (strong winds from the WSW on Mon night, light winds from the SW by Wed morning). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sun morning. Warm (max 20°C on Sat afternoon, min 12°C on Fri morning). Winds increasing (calm on Sat afternoon, fresh winds from the WSW by Sun morning). | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 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) | WSW 15 | WSW 15 | WSW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 9373 | 6356 | 7826 | 3860 | 9389 | 10576 | 9840 | 7220 | 7277 | 6425 | 5001 | 4110 | 3325 | 5012 | 3853 | 2056 | 1133 | 4155 | 2815 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | cross-on | cross | cross-off | cross | cross | cross-off | cross-off | cross-on | cross-off | glassy | on | cross-off | cross-on | cross-on | cross-on |
High Tide | 1:02AM0.71m | 1:28AM0.74m | 2:13AM0.75m | 4:20AM0.76m | 6:36AM0.79m | 7:23AM0.82m | |||||||||||||
Low Tide | 4:41PM0.32m | 4:49PM0.26m | 5:05PM0.23m | 5:18PM0.22m | 5:19PM0.23m | 5:09PM0.24m | |||||||||||||
 |  | |  |  |  |  | | |  |  | | | | | |  | | | |
 | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:47 | — | — |
 | 5:45 | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:50 | — |
mm | 2 | — | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | 2 |
Temp °C | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 15 | 15 | 17 | 20 | 16 | 15 | 15 | 14 |
Feels °C | 6 | 10 | 8 | 8 | 10 | 12 | 10 | 11 | 10 | 12 | 13 | 12 | 13 | 16 | 19 | 13 | 9 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 15 | WSW 15 | WSW 16 | SW 15 | SW 15 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | SW 14 | SW 14 | SW 14 | SW 14 |
| kJ | 9373 | 6356 | 7826 | 3860 | 9389 | 10576 | 9840 | 7220 | 7277 | 6425 | 5001 | 4110 | 3325 | 5012 | 3853 | 2056 | 1133 | 3958 | 2815 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SSW 16 | — | — | — | — | — | — | — | — | SW 24 | SSW 22 | SSW 18 | — | — | SW 19 | SW 16 | — | SW 14 |
| kJ | 2667 | 1629 | — | — | — | — | — | — | — | — | 87 | 308 | 1901 | — | — | 175 | 746 | — | 976 |
Swell 3 Height (m) Direction Period (s) | E 7 | WSW 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 6 | — | — |
| kJ | 10 | 523 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | W 8 | — | — | — | — | — | — | — | — | — | — | — | WNW 3 | WSW 8 | SW 16 | — |
| kJ | — | — | — | 871 | — | — | — | — | — | — | — | — | — | — | — | 8 | 606 | 4155 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 712 | 256 | 62 | 121 | 62 | 85 | 85 | 85 | 145 | 62 | 25 | 144 | 19 | 25 | 19 | 19 | 256 | 145 | 145 |
Best forecast wave conditions in Far South of Western Australia | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 Windy Harbour 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 Windy Harbour Surf forecast
The above surf forecast table for Windy Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Windy Harbour can be found by selecting the local surf guide option on the grey menu. Our Windy Harbour 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 (Windy Harbour) 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 Windy Harbour 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.
Windy Harbour is 168 km (104 miles) from Bunbury. If you plan a holiday in Far South of Western Australia, 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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