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Big Rock Surf Forecast
/ WA – Margaret River (57 breaks) / Western Australia (159 breaks) /
Surf Forecasts:
Big Rock surfForecast / WA – Margaret River / Australia
48hr Weather and Surf, issued 1 pm Monday 18 May 2026 AWSTForecast update in hr min s Forecast update imminent
Big Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big Rock sea temperature is
21.1° C
(Which is slightly warmer than usual)How big are the waves at Big Rock today?
The current surf forecast for Big Rock at 8PM is: 2.2m 11s primary swell from a Southwest direction and 1.3m 17s secondary swell from a West-southwest direction (forecast issued at 01:00pm May 18). The wind direction is predicted to be cross-shore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 7ft (2.1m) | 11s |
| Afternoon (18 May) | 7ft (2.2m) | 11s |
| Evening (18 May) | 7ft (2.1m) | 11s |
Table - waves today at Big Rock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 20°C on Wed morning, min 14°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | SW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | |
1053 | 1121 | 1121 | 1141 | 1107 | 1094 | 1214 | 1184 | 1488 | 1428 | 2457 | 2423 | 2423 | 2281 | 2281 | 1997 | 1852 | 1590 | 1230 | 2003 | 2180 | 2546 | 2618 | 2618 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | cross-on | cross | cross-off | off | off | off | cross | cross-on | cross | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | on | on | glassy | glassy | cross | cross-on | cross | |
High Tide | 9:41AM1.14m | 10:09AM1.15m | 10:36AM1.11m | |||||||||||||||||||||
Low Tide | 7:49PM0.29m | 9:01PM0.32m | 10:13PM0.36m | |||||||||||||||||||||
 |  |  |  | | | | | | | | | | | | | | | |  | | | | | |
 | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — |
 | — | — | 5:24 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:23 | — | — | — | — | 5:23 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 18 | 17 | 17 | 16 | 15 | 14 | 14 | 16 | 17 | 18 | 17 | 17 | 19 | 19 | 19 | 20 | 20 | 19 | 19 | 18 | 18 | 18 | 18 |
16 | 16 | 15 | 15 | 15 | 13 | 12 | 12 | 15 | 16 | 17 | 16 | 15 | 17 | 17 | 18 | 19 | 19 | 19 | 20 | 18 | 18 | 17 | 16 | |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | WSW 15 | WSW 15 | SW 14 | SW 14 | SW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | SW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 |
 kJ | 1053 | 1121 | 1121 | 1141 | 1107 | 999 | 981 | 898 | 1488 | 1428 | 2457 | 2423 | 2423 | 2281 | 2281 | 1997 | 1852 | 1590 | 1230 | 2003 | 2180 | 2546 | 2618 | 2618 |
Swell 2 Height (m) Direction Period (s) | WSW 18 | WSW 18 | WSW 17 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | SW 11 | SW 11 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | WSW 16 | S 9 | S 9 | S 9 | — | — |
| kJ | 596 | 659 | 742 | 879 | 1068 | 1094 | 1214 | 1184 | 659 | 595 | 9 | 9 | 8 | 2 | 8 | 7 | 2 | 2 | 546 | 2 | 2 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 13 | — | S 12 | S 12 | S 12 | S 11 | S 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 14 | — | 47 | 45 | 41 | 9 | 38 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 3 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 15 | 0 | 0 | 0 | 53 | 53 | 2 | 2 | 2 | 2 | 0 | 0 | 1 | 1 | 20 |
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 Big Rock 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.
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