Cathedral Rock surfForecast / WA – Rottnest Island / Australia

information circle16 Day Weather and Surf, issued 1 am Saturday 21 Mar 2026 AWST
Forecast 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
22.8° C
(Which is normal for this time of year)

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 Tuesday (Mar 24) at 8AM. The primary swell is predicted to be 1.1m 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 1.8m 13s and forecast to arrive on Sunday (Mar 22) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 6s period and expected on Tuesday (Mar 24) at 5PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 24th Mar)3.5ft (1.1m) 12s
Best Surf 8AM (Tue 24th Mar)3.5ft (1.1m) 12s
Most Powerful 2PM (Sun 22nd Mar)6ft (1.8m) 13s

Table - best surf conditions forecast for Cathedral Rock over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 26°C on Sun night, min 18°C on Sun morning). Winds increasing (light winds from the SSE on Sat morning, strong winds from the ESE by Mon night).

Days 3-6 Weather Summary Mostly dry. Warm (max 31°C on Thu afternoon, min 16°C on Wed morning). Winds decreasing (strong winds from the ESE on Wed night, moderate winds from the E by Thu afternoon).

Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
1
1
0
1
1
1
1
0
0
0
1
0
0
0
0
0
0
1
0
Swell
Height Map
Wave Height (m) & direction (?)
1.4
SW
1.2
WSW
1.7
SW
1.2
WSW
2.2
SW
1.6
SW
1.2
SW
1.1
SW
1.1
SW
0.9
WSW
1.8
SW
1.3
SW
0.8
WSW
0.8
WSW
1.2
SW
0.9
WSW
0.9
WSW
0.8
WSW
0.7
SW
0.7
WSW
0.6
WSW
Period(s) (?)141381461313131212611111312121212121211
Wave
Graph
(?)Metric surfscale
Energy kJ (?)661479352486354796479370336247039115121544426025518714712385
Wind
(km/h)
10
SW
30
SSW
35
SSE
25
SSE
40
SSW
35
SE
30
SSE
35
SSE
35
ESE
25
S
45
SSW
35
SE
20
SSE
30
S
40
ESE
35
E
25
ESE
45
E
35
ENE
20
SSE
40
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off
cross-
off
cross-
off
cross-
off
offoffoffoffcross-
off
cross-
off
offoffcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
High Tide
/ height (m)
10:52AM
0.79
12:05AM
0.50
11:19AM
0.88
11:52AM
0.96
12:33PM
1.01
1:27PM
1.02
2:52PM
1.00
4:52PM
0.95
Low Tide
/ height (m)
6:24PM
0.39
3:19AM
0.47
8:41PM
0.41
12:34AM
0.39
1:31AM
0.35
2:13AM
0.33
2:48AM
0.33
3:17AM
0.33
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Friday
27
Sunrise6:20--6:22--6:22--6:22--6:24--6:24--6:24--
Sunset-6:29--6:27--6:25--6:24--6:23--6:22--6:21-
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
Rain (mm)
---------------------
Temp. °C222121202326212521192123202827213129213029
Feels °C (?)241818171820161914161618172319132622142624
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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