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Surf Forecasts:

Cathedral Rock surfForecast / WA – Rottnest Island / Australia

information circle12 Day Weather and Surf, issued 1 pm Friday 29 Aug 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
18.9° 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 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 29) at 8PM. The primary swell is predicted to be 1.0m and 10s period with a secondary swell of 0.3m and 19s. 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 3.5m 17s and forecast to arrive on Thursday (Sep 04) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Sep 02) at 8PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Fri 29th Aug)3.5ft (1.0m) 10s
Best Surf 2AM (Sun 31st Aug)3.5ft (1.0m) 20s
Most Powerful 5PM (Thu 4th Sep)11ft (3.5m) 17s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Mostly dry. Very mild (max 15°C on Sat afternoon, min 11°C on Sat morning). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Wed night. Very mild (max 18°C on Wed night, min 14°C on Mon night). Winds increasing (calm on Tue afternoon, fresh winds from the WSW by Thu morning).

Fri
29
Saturday
30
Sunday
31
Monday
01
Tuesday
02
Wednesday
03
Thursday
04
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
1
0
2
4
4
3
4
3
3
3
3
2
3
4
2
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
SW
0.9
SW
0.6
WSW
0.6
WSW
1
WSW
1.9
WSW
2
WSW
2
WSW
1.7
WSW
1.7
WSW
1.4
WSW
1.6
WSW
1.8
WSW
1.9
WSW
1.9
WSW
2.2
WSW
2.5
W
3
WSW
3.5
WSW
3.5
WSW
3
WSW
Period(s) (?)10101616201816161514131313131514720171614
Wave
Graph
(?)Metric surfscale
Energy (?)30633132642814172265204618991275111472285011171436156818356546874819257473135
Wind
(km/h)
15
SSW
15
ESE
20
NE
10
SSW
15
ESE
5
E
20
S
15
SSE
5
SSE
15
SSW
10
SE
15
NE
15
S
20
ENE
5
E
15
SW
30
W
30
W
30
WSW
20
WNW
45
NNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		crosscross-
off		offcross-
off		cross-
off		offglasscross-
off		offcross-
off		cross-
off		cross-
off		glasscrosscross-
on		cross-
on		cross-
on		cross-
on		on
High Tide
/ height (m)
12:51AM
0.75
1:32AM
0.82
2:27AM
0.89
3:49AM
0.93
5:17AM
0.96
6:28AM
0.96
7:27AM
0.93
Low Tide
/ height (m)
4:05PM
0.34
3:45PM
0.37
3:26PM
0.40
3:19PM
0.41
3:21PM
0.41
3:31PM
0.39
3:46PM
0.36
Fri
29
Saturday
30
Sunday
31
Monday
01
Tuesday
02
Wednesday
03
Thursday
04
Sunrise--6:37--6:37--6:35--6:33--6:33--6:31--6:31
Sunset5:59--5:59--6:00--6:00--6:00--6:01--6:02--
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
rain showers
rain showers
light rain
part cloud
rain showers
Rain (mm)
----------------111-2
Temp. °C141412151513151514161614161615171818181718
Feels °C (?)12118121110101013121212131213141211121210
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

Eyeball surf reportRecent Eyeball Surf Reports for WA - Rottnest Island

  1. weather stationWind Update Continuing clean conditions at Cathedral Rock (calm at Swanbourne Automatic Weather Station 30 km from Cathedral Rock). 1.1m 9s swell from the WSW with a 0.3m 11s groundswell from the W. 2 swells combining to make bigger set waves.

    1 hour 58 minutes ago Cathedral Rock
Expand
<
>
View all

30 km away, 1 h 58 min ago

4 km/h
E
0.0
18.9
Air / Water (°C)
Please reload the page to see if there are any updates.

FREE! Surf-Forecast.com widget for your website

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.

View detailed surf forecast for Cathedral Rock at:
surf-forecast.com

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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