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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 7 am Wednesday 20 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
21.7° 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 11AM is: 1.5m 14s primary swell from a West-southwest direction and 0.3m 3s secondary swell from a North-northwest direction (forecast issued at 07:00am May 20). The wind direction is predicted to be cross-onshore.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 5ft (1.5m) | 14s |
| Afternoon (20 May) | 5ft (1.5m) | 14s |
| Evening (20 May) | 4ft (1.2m) | 13s |
Table - waves today at Cathedral Rock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 21°C on Wed afternoon, min 13°C on Fri night). Winds increasing (calm on Wed afternoon, fresh winds from the SSW by Thu afternoon). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | SW 13 | WSW 13 | WSW 13 | SW 13 | WSW 12 | WSW 12 | |
956 | 956 | 956 | 899 | 735 | 506 | 491 | 917 | 1047 | 1240 | 1240 | 1223 | 1138 | 854 | 829 | 805 | 690 | 1030 | 981 | 560 | 551 | 864 | 636 | 605 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | on | cross-on | cross-on | glassy | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | off | cross-off | cross-off | |
High Tide | 11:08AM1.19m | 11:43AM1.09m | 12:13PM0.96m | |||||||||||||||||||||
Low Tide | 10:28PM0.43m | 11:30PM0.43m | 00:14AM0.44m | |||||||||||||||||||||
 |  |  |  | |  | |  | | | | | |  | | | | | | | | | | | |
 | 7:01 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — | — | 7:03 |
 | — | — | — | — | 5:25 | — | — | — | — | — | — | — | 5:25 | — | — | — | — | — | — | — | 5:24 | — | — | 5:24 |
— | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 20 | 19 | 20 | 21 | 21 | 20 | 20 | 19 | 19 | 19 | 20 | 18 | 18 | 18 | 18 | 17 | 16 | 15 | 16 | 17 | 18 | 17 | 14 |
15 | 18 | 16 | 19 | 21 | 19 | 18 | 19 | 18 | 17 | 17 | 16 | 12 | 11 | 10 | 11 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 9 | |
Swell 1 Height (m) Direction Period (s) | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | SW 13 | WSW 13 | WSW 13 | SW 13 | WSW 12 | WSW 12 |
 kJ | 956 | 956 | 956 | 899 | 735 | 506 | 491 | 917 | 1047 | 1240 | 1240 | 1223 | 1138 | 854 | 829 | 805 | 690 | 1030 | 981 | 560 | 551 | 864 | 636 | 605 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | WSW 16 | WSW 16 | — | — | — | — | — | — | — | WSW 7 | WSW 7 | SW 7 | W 18 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 201 | 333 | — | — | — | — | — | — | — | 178 | 159 | 165 | 6 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 18 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 3 | NNW 3 | NNW 3 | — | — | — | — | — | — | — | — | — | SW 4 | SW 6 | S 5 | SSE 4 | — | — | — | SW 7 | SSW 7 | — | SE 3 | ESE 3 |
| kJ | 5 | 4 | 2 | — | — | — | — | — | — | — | — | — | 36 | 244 | 57 | 21 | — | — | — | 115 | 123 | — | 2 | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 144 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 64 | 472 | 144 | 144 | 144 | 144 | 29 | 64 | 0 | 144 | 144 | 28 | 3 | 3 |
Best forecast wave conditions in Rottnest Island | ||||||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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