Surf Forecasts:
How big are the waves at Cathedral Rock today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 8ft (2.5m), 16s period with WSW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 8ft (2.5m), 16s period with WSW swell.
- Evening surf: Evening surf (20 Aug, local time) - 7.5ft (2.3m), 16s period with WSW swell.
The current surf forecast for Cathedral Rock at 6AM is: 3.0m 16s primary swell from a West-southwest direction (forecast issued at 01:00am August 20). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (AWST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 8ft (2.5m) | 16s |
| Afternoon (20 Aug) | 8ft (2.5m) | 16s |
| Evening (20 Aug) | 7.5ft (2.3m) | 16s |
Table - waves today at Cathedral Rock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 17°C on Thu afternoon, min 13°C on Fri morning). Winds increasing (light winds from the E on Thu morning, strong winds from the S by Sat night). | ||||||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||||||||||
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 | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 4161 | 4320 | 3944 | 3594 | 2986 | 2696 | 2696 | 2491 | 2459 | 2179 | 2094 | 2010 | 1822 | 1900 | 1822 | 1600 | 1600 | 1265 | 1319 | 1904 | 1547 | 1307 | 1154 | 949 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off |
High Tide | 1:43AM0.77m | 2:45AM0.84m | 4:01AM0.91m | |||||||||||||||||||||
Low Tide | 4:05PM0.34m | 4:03PM0.38m | 3:59PM0.41m | |||||||||||||||||||||
 |  |  |  | | | | | | | | | | | | | | | | | |  |  | | |
 | — | 6:50 | — | — | — | — | — | — | — | 6:48 | — | — | — | — | — | — | — | 6:48 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:53 | — | — | — | — | — | — | — | 5:54 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 15 | 15 | 16 | 17 | 17 | 16 | 15 | 14 | 13 | 14 | 16 | 17 | 17 | 17 | 17 | 16 | 15 | 16 | 17 | 16 | 16 | 16 |
Feels °C | 12 | 13 | 13 | 14 | 14 | 14 | 13 | 12 | 11 | 10 | 9 | 12 | 13 | 13 | 12 | 13 | 14 | 13 | 12 | 14 | 14 | 10 | 10 | 9 |
Swell 1 Height (m) Direction Period (s) | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 | WSW 15 | WSW 15 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 14 | WSW 16 | WSW 16 | WSW 16 | WSW 16 | WSW 15 |
| kJ | 4161 | 4320 | 3944 | 3594 | 2986 | 2696 | 2696 | 2491 | 2459 | 2179 | 2094 | 2010 | 1822 | 1900 | 1822 | 1600 | 1600 | 1265 | 1319 | 1904 | 1547 | 1307 | 1154 | 949 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 26 | SW 24 | WSW 24 | WSW 22 | SW 22 | WSW 19 | WSW 18 | WSW 18 | WSW 18 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 13 | 22 | 54 | 95 | 118 | 584 | 436 | 759 | 596 | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 4 | S 4 | — | — | — | — | — | SSW 3 | S 4 | SSW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 9 | 7 | — | — | — | — | — | 5 | 14 | 29 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 64 | 64 | 0 | 0 | 0 | 28 | 0 | 0 | 144 | 144 | 0 | 3 | 0 | 1 | 1 | 144 | 192 | 144 | 144 |
Best forecast wave conditions in Rottnest Island | ||||||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||||||
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