Surf Forecasts:
Cathedral Rock surf forecast from 17 Sep 2026:
- Best quality surf: Monday 21 Sep, 2AM (local time) - 5.5ft (1.7m), 16s period, WSW swell with offshore winds.
- Most powerful swell: Saturday 19 Sep, 11AM (local time) - 15ft (4.5m), 14s period, W swell with 8,674 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 11AM (local time) - 7ft (2.1m), 12s period with WSW swell.
Best Forecast Surf Conditions for Cathedral Rock this week:
The surf forecast for Cathedral Rock over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 11AM. The primary swell is predicted to be 2.1m and 12s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cathedral Rock in the next 16 days are 4.5m 14s and forecast to arrive on Saturday (Sep 19) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Wednesday (Sep 23) at 8PM.
| Wave Type | Time (AWST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11AM (Sun 20th Sep) | 7ft (2.1m) 12s |
| Best Surf | 2AM (Mon 21st Sep) | 5.5ft (1.7m) 16s |
| Most Powerful | 11AM (Sat 19th Sep) | 15ft (4.5m) 14s |
Table - best surf conditions forecast for Cathedral Rock over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Sat night. Warm (max 20°C on Fri afternoon, min 15°C on Fri night). Winds increasing (light winds from the WNW on Thu night, near gales from the WNW by Fri night). | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Tue afternoon, min 14°C on Mon night). Winds increasing (calm on Mon morning, strong winds from the S by Tue night). | ||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | WSW 13 | WSW 12 | W 18 | W 16 | W 14 | W 13 | W 13 | WSW 12 | SW 13 | WSW 16 | WSW 15 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 298 | 258 | 2733 | 5266 | 8674 | 5482 | 2323 | 1252 | 689 | 1517 | 1850 | 1828 | 1328 | 996 | 1175 | 1127 | 958 | 659 | 412 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | off | cross-off | off | glassy | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 00:23AM0.84m | 1:04AM0.86m | 2:02AM0.85m | 3:53AM0.82m | 5:37AM0.79m | 11:14PM0.61m | 6:47AM0.76m | 10:04PM0.56m | |||||||||||
Low Tide | 2:38PM0.36m | 2:41PM0.38m | 2:42PM0.38m | 2:44PM0.37m | 2:50PM0.34m | 00:00AM0.61m | 2:59PM0.32m | 1:26AM0.51m | |||||||||||
 |  | |  |  |  |  | | | | | |  | | | | | | | |
 | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:09 | — | 6:10 | — | — | 6:12 | — | — | 6:12 | — | — | 6:13 | — | — | 6:13 | — | — | 6:14 | — |
mm | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 20 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 16 | 16 | 14 | 17 | 17 | 14 | 16 | 17 |
Feels °C | 19 | 14 | 14 | 8 | 7 | 8 | 12 | 13 | 13 | 12 | 14 | 13 | 11 | 10 | 10 | 9 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | WSW 13 | WSW 12 | — | — | — | — | W 13 | WSW 12 | SW 13 | WSW 16 | WSW 15 | WSW 16 | WSW 15 | WSW 14 | WSW 14 | WSW 13 | WSW 13 | WSW 13 | WSW 12 |
| kJ | 298 | 258 | — | — | — | — | 2323 | 1252 | 689 | 1517 | 1850 | 1828 | 1328 | 996 | 1175 | 1127 | 958 | 659 | 412 |
Swell 2 Height (m) Direction Period (s) | WNW 4 | WSW 17 | — | — | — | — | SW 11 | — | W 9 | W 8 | — | — | — | — | — | — | — | — | SW 6 |
| kJ | 6 | 219 | — | — | — | — | 121 | — | 192 | 86 | — | — | — | — | — | — | — | — | 44 |
Swell 3 Height (m) Direction Period (s) | SW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WSW 16 |
| kJ | 87 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 27 |
Wind waves Height (m) Direction Period (s) | — | NW 4 | W 18 | W 16 | W 14 | W 13 | — | — | — | — | — | — | S 3 | — | — | — | — | SSW 4 | — |
| kJ | — | 14 | 2733 | 5266 | 8674 | 5482 | — | — | — | — | — | — | 3 | — | — | — | — | 16 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 7 | 318 | 318 | 452 | 752 | 1901 | 177 | 0 | 0 | 0 | 0 | 144 | 64 | 144 | 144 | 0 | 0 | 144 | 28 |
Best forecast wave conditions in Rottnest Island | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cathedral 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.
Information about the Cathedral Rock Surf forecast
The above surf forecast table for Cathedral Rock provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cathedral Rock can be found by selecting the local surf guide option on the grey menu. Our Cathedral Rock surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Cathedral Rock) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Cathedral Rock may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Cathedral Rock is 31 km (19 miles) from the very large city of Fremantle. If you plan a holiday in Rottnest Island, look for hotels and other accommodation in Fremantle. Fremantle has rooms for a wide range of budgets as well as cheap car hire and transport links.
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