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Cathedral Rock Surf Forecast
/ WA – Rottnest Island (6 breaks) / Western Australia (159 breaks) /
Surf Forecasts:
Cathedral Rock surfForecast / WA – Rottnest Island / Australia
48hr Weather and Surf, issued 1 pm Monday 18 May 2026 AWSTForecast update in hr min s Forecast update imminent
Cathedral Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cathedral Rock sea temperature is
21.9° C
(Which is normal for this time of year)How big are the waves at Cathedral Rock today?
The current surf forecast for Cathedral Rock at 9PM is: 1.4m 11s primary swell from a Southwest direction and 0.9m 17s secondary swell from a West-southwest direction (forecast issued at 01:00pm May 18). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 4ft (1.2m) | 11s |
| Afternoon (18 May) | 4ft (1.2m) | 11s |
| Evening (18 May) | 4.5ft (1.4m) | 11s |
Table - waves today at Cathedral Rock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 22°C on Tue afternoon, min 17°C on Mon afternoon). 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 |    |    |    |    | ||||||||||||||||||||
WSW 11 | WSW 11 | SW 11 | SW 11 | SW 11 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | |
323 | 326 | 347 | 431 | 439 | 475 | 547 | 575 | 671 | 662 | 604 | 706 | 669 | 1091 | 956 | 956 | 956 | 943 | 837 | 577 | 569 | 904 | 1083 | 1240 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross | cross | glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | off | off | cross-off | cross-off | cross-off | |
High Tide | 9:53AM1.25m | 10:31AM1.25m | 11:08AM1.19m | |||||||||||||||||||||
Low Tide | 7:56PM0.44m | 9:14PM0.44m | 10:28PM0.43m | |||||||||||||||||||||
 |  | |  | | | | | | | | | | | | | | |  |  | | | | | |
 | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:03 | — |
 | — | — | 5:27 | — | — | — | — | — | — | — | 5:27 | — | — | — | — | — | — | — | 5:25 | — | — | — | — | 5:25 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 17 | 18 | 18 | 18 | 17 | 17 | 17 | 18 | 21 | 22 | 21 | 20 | 20 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 19 | 19 | 18 |
17 | 16 | 15 | 14 | 15 | 15 | 16 | 15 | 16 | 20 | 19 | 18 | 16 | 15 | 15 | 16 | 15 | 19 | 17 | 17 | 17 | 16 | 15 | 13 | |
Swell 1 Height (m) Direction Period (s) | WSW 11 | WSW 11 | SW 11 | SW 11 | SW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 11 | WSW 15 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 |
 kJ | 323 | 323 | 347 | 431 | 439 | 411 | 386 | 379 | 379 | 302 | 604 | 706 | 669 | 1091 | 956 | 956 | 956 | 943 | 837 | 577 | 569 | 904 | 1083 | 1240 |
Swell 2 Height (m) Direction Period (s) | WSW 18 | WSW 18 | WSW 18 | WSW 18 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 11 | WSW 10 | WSW 11 | — | — | — | — | NNW 3 | — | WSW 16 | WSW 16 | — | — | — |
| kJ | 249 | 326 | 326 | 348 | 409 | 475 | 547 | 575 | 671 | 662 | 247 | 173 | 180 | — | — | — | — | 1 | — | 266 | 263 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SSW 3 | — | — | — | — | — | — | — | — | — | — | NNE 3 | N 3 | NNW 3 | — | — | — | — | — | — | — |
| kJ | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | 3 | 3 | 2 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 144 | 64 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 7 | 7 | 1 | 1 | 0 | 0 | 0 | 0 | 28 | 28 | 31 |
Best forecast wave conditions in Rottnest Island | ||||||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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