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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 11 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
20.9° C
(Which is slightly warmer than usual)How big are the waves at Big Rock today?
The current surf forecast for Big Rock at 6PM is: 1.2m 12s primary swell from a West-southwest direction and 0.6m 15s secondary swell from a West direction (forecast issued at 01:00pm May 11). An open ocean swell of 1.8m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 May) | 4ft (1.2m) | 13s |
| Afternoon (11 May) | 4.5ft (1.3m) | 13s |
| Evening (11 May) | 4ft (1.2m) | 12s |
Table - waves today at Big Rock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Wed afternoon. Warm (max 21°C on Mon afternoon, min 15°C on Thu morning). Winds decreasing (fresh winds from the N on Mon afternoon, light winds from the SSW by Wed night). | ||||||||||||||||||||||||
Mon 11 | Tuesday 12 | Wednesday 13 | Thu 14 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 13 | WSW 12 | W 12 | W 12 | WSW 13 | WSW 15 | WSW 14 | WSW 14 | WSW 15 | WSW 15 | WSW 15 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | |
491 | 633 | 454 | 412 | 673 | 947 | 1312 | 1435 | 1808 | 3074 | 3242 | 4314 | 7357 | 8392 | 8989 | 8708 | 8268 | 7161 | 6452 | 5733 | 5022 | 4642 | 4401 | 4309 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | cross | cross | cross-on | cross-on | cross-on | |
High Tide | 8:51AM0.80m | 5:55PM0.74m | 8:08AM0.81m | 8:03PM0.71m | 7:59AM0.85m | 9:43PM0.69m | ||||||||||||||||||
Low Tide | 2:34PM0.72m | 1:04AM0.56m | 2:45PM0.60m | 1:16AM0.60m | 3:21PM0.50m | 1:13AM0.65m | ||||||||||||||||||
 |  | |  | | | | | | | |  | | | |  | |  |  | |  | | | | |
 | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — | — | — | 7:03 | — |
 | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:29 | — | — | — | — | 5:28 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | |
Temp °C | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 20 | 20 | 19 | 20 | 20 | 20 | 20 | 18 | 17 | 17 | 16 | 16 | 15 |
15 | 15 | 15 | 16 | 16 | 17 | 17 | 16 | 17 | 17 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 14 | 14 | 15 | 13 | 12 | 10 | |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 13 | WSW 13 | WSW 12 | WSW 13 | WSW 12 | W 12 | W 12 | WSW 13 | WSW 15 | WSW 14 | WSW 14 | WSW 15 | WSW 15 | WSW 15 | WSW 16 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 |
 kJ | 491 | 633 | 454 | 412 | 673 | 947 | 1312 | 1435 | 1808 | 3074 | 3242 | 4314 | 7357 | 8392 | 8989 | 8708 | 8268 | 7161 | 6452 | 5733 | 5022 | 4642 | 4401 | 4309 |
Swell 2 Height (m) Direction Period (s) | W 16 | — | W 15 | WSW 14 | SW 16 | SSW 15 | WSW 18 | W 17 | W 16 | WSW 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 134 | — | 161 | 218 | 10 | 22 | 31 | 149 | 193 | 883 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | N 6 | NNW 5 | — | N 5 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 256 | 320 | 307 | 249 | 207 | 164 | 104 | 80 | 62 | 43 | — | 17 | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 159 | 202 | 144 | 53 | 53 | 144 | 144 | 53 | 53 | 53 | 53 | 2 | 15 | 86 | 86 | 88 | 202 | 359 | 2 | 20 | 1 | 2 | 2 | 2 |
Best forecast wave conditions in Margaret River | ||||||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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