Surf Forecasts:
The Box surf forecast from 17 Aug 2026:
- Best quality surf: Monday 17 Aug, 11PM (local time) - 18ft (5.5m), 15s period, WSW swell with cross-onshore winds.
- Most powerful swell: Monday 17 Aug, 11PM (local time) - 18ft (5.5m), 15s period, WSW swell with 12,105 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 11PM (local time) - 18ft (5.5m), 15s period with WSW swell.
Best Forecast Surf Conditions for The Box this week:
The surf forecast for The Box over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 11PM. The primary swell is predicted to be 5.5m and 15s period with a secondary swell of 4.0m and 16s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at The Box in the next 16 days are 5.5m 15s and forecast to arrive on Monday (Aug 17) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 17th Aug) | 18ft (5.5m) 15s |
| Best Surf | 11PM (Mon 17th Aug) | 18ft (5.5m) 15s |
| Most Powerful | 11PM (Mon 17th Aug) | 18ft (5.5m) 15s |
Table - best surf conditions forecast for The Box over the next 16 days.
Short Range ForecastModerate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 16°C on Tue night, min 13°C on Mon afternoon). Winds decreasing (strong winds from the W on Mon afternoon, light winds from the WSW by Wed night). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sat night. Very mild (max 16°C on Thu afternoon, min 12°C on Fri night). Winds increasing (calm on Fri morning, fresh winds from the SW by Sun morning). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
PM | 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 12 | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | WSW 14 | WSW 13 | WSW 16 | WSW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 9973 | 11722 | 10736 | 8957 | 6098 | 8846 | 10681 | 9678 | 7301 | 6520 | 6304 | 4814 | 4158 | 3144 | 4471 | 3283 | 3167 | 2422 | 5091 | 3883 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | on | cross-on | off | glassy | cross | on | cross-on | cross-on | cross-on |
High Tide | 00:14AM0.54m | 00:34AM0.58m | 1:16AM0.61m | 4:00AM0.61m | 5:40AM0.64m | 6:41AM0.67m | ||||||||||||||
Low Tide | 4:02PM0.28m | 3:16PM0.22m | 3:12PM0.16m | 3:26PM0.12m | 3:44PM0.10m | 4:03PM0.08m | 4:23PM0.07m | |||||||||||||
 |  |  |  | | |  |  |  | | | | | | | | | | |  | |
 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — |
 | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — |
mm | 3 | 1 | — | 1 | 3 | 3 | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — |
Temp °C | 13 | 15 | 14 | 15 | 16 | 16 | 16 | 16 | 15 | 16 | 16 | 15 | 15 | 14 | 15 | 15 | 16 | 15 | 15 | 15 |
Feels °C | 3 | 7 | 9 | 9 | 11 | 12 | 12 | 14 | 10 | 12 | 13 | 14 | 13 | 12 | 14 | 13 | 13 | 9 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | — | WSW 15 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 16 | WSW 16 | WSW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 16 | SW 16 | WSW 20 | WSW 13 | WSW 16 | WSW 14 |
| kJ | — | 11722 | 10736 | 8957 | 6098 | 8846 | 10681 | 9678 | 7301 | 6520 | 6304 | 4814 | 4158 | 3144 | 4471 | 3283 | 437 | 2422 | 5091 | 3883 |
Swell 2 Height (m) Direction Period (s) | — | SW 17 | SW 16 | — | — | — | — | — | — | — | — | WSW 24 | SW 22 | SW 18 | — | WSW 23 | — | WSW 17 | — | — |
| kJ | — | 2221 | 659 | — | — | — | — | — | — | — | — | 55 | 227 | 1802 | — | 52 | — | 1749 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 14 | — | — | — |
| kJ | 9973 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3167 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 754 | 589 | 215 | 195 | 195 | 12 | 30 | 12 | 12 | 12 | 12 | 7 | 12 | 0 | 0 | 11 | 47 | 12 | 12 | 12 |
Best forecast wave conditions in Margaret River | ||||||||||||||||||||
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 The Box 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 Box Surf forecast
The above surf forecast table for The Box provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Box can be found by selecting the local surf guide option on the grey menu. Our The Box 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 Box) 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 Box 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 Box is 92 km (57 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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