Cathedral Rock surfForecast / WA – Rottnest Island / Australia

information circle12 Day Weather and Surf, issued 7 am Thursday 11 Dec 2025 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
21.0° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Cathedral Rock this week:

The surf forecast for Cathedral Rock over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 14) at 2PM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.4m and 13s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Cathedral Rock in the next 12 days are 2.1m 14s and forecast to arrive on Wednesday (Dec 17) 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 1.6m 6s period and expected on Wednesday (Dec 17) at 8AM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Sun 14th Dec)3ft (0.9m) 11s
Best Surf 8PM (Mon 15th Dec)2.5ft (0.8m) 11s
Most Powerful 2PM (Wed 17th Dec)7ft (2.1m) 14s

Table - best surf conditions forecast for Cathedral Rock over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 31°C on Sat night, min 19°C on Thu night). Mainly near gales.

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun night. Warm (max 34°C on Sun afternoon, min 22°C on Tue night). Winds decreasing (strong winds from the NE on Sun afternoon, calm by Mon night).

Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
0
0
1
1
1
0
0
0
0
0
0
1
2
1
0
0
1
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.6
SW
2.1
SW
1.7
SW
1.1
WSW
2
SW
1.7
SW
1.1
SW
1
WSW
1.3
WSW
0.9
WSW
0.8
WSW
0.8
WSW
0.8
WSW
0.8
WSW
0.6
WSW
0.7
WSW
0.8
WSW
0.7
WSW
0.8
WSW
2.3
SW
1.8
SW
Period(s) (?)131281212121111111111121211161515151478
Wave
Graph
(?)Metric surfscale
Energy kJ (?)77212923733651112781298243389170133153156149196191259191236471408
Wind
(km/h)
30
S
50
SSW
40
SSE
35
S
35
SSW
35
ESE
25
S
40
S
30
E
20
E
50
NE
15
NNE
20
SW
20
SSW
15
ESE
5
WSW
20
SW
15
W
20
SSW
25
SSW
30
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscross-
on
cross-
off
cross-
off
cross-
off
crosscrosscross-
on
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
9:24PM
0.53
8:12PM
0.48
6:28PM
0.52
6:13PM
0.61
6:34PM
0.73
7:01PM
0.85
7:31PM
0.95
Low Tide
/ height (m)
10:18AM
0.27
9:15AM
0.28
7:01AM
0.25
6:28AM
0.22
5:32AM
0.22
4:53AM
0.23
4:53AM
0.25
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Sunrise5:05--5:05--5:05--5:05--5:05--5:05--5:05--
Sunset-7:16--7:16--7:17--7:19--7:19--7:20--7:21-
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
thunderstorm
part cloud
clear
clear
clear
clear
rain showers
part cloud
part cloud
part cloud
Rain (mm)
-----------1-----1---
Temp. °C222122242426262531333429282828313023212120
Feels °C (?)191414181919221924293128242727312724222017
  • 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 12 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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