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The Box Surf Forecast
/ WA – Margaret River (57 breaks) / Western Australia (159 breaks) /
Surf Forecasts:
The Box surfForecast / WA – Margaret River / Australia
16 Day Weather and Surf, issued 7 am Saturday 16 May 2026 AWSTForecast update in hr min s Forecast update imminent
The Box surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's The Box sea temperature is
21.3° C
(Which is 1.1°C warmer than normal for this time of year)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 (May 18) at 11PM. The primary swell is predicted to be 1.5m and 16s period with a secondary swell of 2.1m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at The Box in the next 16 days are 2.5m 14s and forecast to arrive on Thursday (May 21) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Friday (May 22) at 8AM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 18th May) | 5ft (1.5m) 16s |
| Best Surf | 11PM (Mon 18th May) | 5ft (1.5m) 16s |
| Most Powerful | 5AM (Thu 21st May) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for The Box over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Sun morning. Very mild (max 18°C on Sun morning, min 15°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Tue afternoon, min 15°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 12 | SW 12 | SW 11 | WSW 16 | WSW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 14 | WSW 14 | WSW 13 | SW 13 | SW 13 | SW 13 | |
2975 | 2077 | 1685 | 1530 | 1310 | 963 | 698 | 1072 | 1305 | 1634 | 2577 | 2265 | 1868 | 1788 | 2554 | 2412 | 1913 | 1216 | 1077 | 1708 | 1778 | |
Wind (km/h) | |||||||||||||||||||||
on | on | on | cross-on | cross-on | cross | cross-on | cross-on | off | cross | cross | cross-on | on | cross-on | cross-off | cross | cross | cross | cross-off | cross-off | off | |
High Tide | 8:56AM0.80m | 9:25AM0.85m | 9:59AM0.87m | 10:35AM0.86m | 11:10AM0.81m | 11:35AM0.73m | 11:24AM0.64m | ||||||||||||||
Low Tide | 6:09PM0.01m | 7:22PM-0.03m | 8:46PM-0.04m | 10:10PM-0.04m | 11:22PM-0.01m | 00:18AM0.04m | 1:00AM0.12m | ||||||||||||||
 |  |  |  |  |  | | |  | | | | | | | | |  | | | | |
 | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — |
 | — | 5:27 | — | — | 5:25 | — | — | 5:24 | — | — | 5:24 | — | — | 5:23 | — | — | 5:22 | — | — | 5:22 | — |
— | — | 3 | 3 | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 19 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 17 | 14 |
15 | 14 | 15 | 17 | 15 | 16 | 17 | 16 | 16 | 15 | 18 | 18 | 19 | 18 | 18 | 14 | 13 | 12 | 12 | 13 | 9 | |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 12 | SW 12 | SW 12 | SW 11 | SW 12 | SW 12 | SW 11 | SW 11 | WSW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | WSW 14 | WSW 14 | WSW 13 | SW 13 | SW 13 | SW 13 |
 kJ | 2975 | 2077 | 1685 | 1530 | 1310 | 963 | 698 | 1072 | 952 | 1634 | 2577 | 2265 | 1868 | 1788 | 2554 | 2412 | 1913 | 1216 | 1077 | 1708 | 1778 |
Swell 2 Height (m) Direction Period (s) | — | — | W 24 | WSW 21 | WSW 21 | SSW 11 | SSW 11 | WSW 17 | WSW 16 | SW 10 | S 11 | S 10 | S 10 | WSW 16 | S 9 | — | — | — | — | — | NNW 8 |
| kJ | — | — | 11 | 90 | 88 | 161 | 436 | 921 | 1305 | 562 | 37 | 18 | 7 | 234 | 2 | — | — | — | — | — | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SW 21 | WSW 19 | WSW 18 | S 14 | S 12 | S 11 | — | — | — | S 10 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 113 | 332 | 651 | 15 | 47 | 39 | — | — | — | 2 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 4 | S 6 | SSE 6 | SSE 5 | ENE 3 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 | 215 | 50 | 34 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 12 | 12 | 12 | 12 | 12 | 11 | 12 | 11 | 0 | 3 | 17 | 34 | 12 | 11 | 0 | 44 | 642 | 30 | 11 | 11 | 0 |
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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