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Surf Forecasts:

Cathedral Rock surfForecast / WA – Rottnest Island / Australia

information circle16 Day Weather and Surf, issued 1 am Wednesday 18 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
21.6° C
 (Which is slightly cooler than normal)

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 Thursday (Mar 19) at 2AM. The primary swell is predicted to be 0.8m and 12s period with a secondary swell of 0.3m and 3s. 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 1.9m 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 2.0m 6s period and expected on Tuesday (Mar 24) at 5PM.

Wave TypeTime (AWST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 19th Mar)2.5ft (0.8m) 12s
Best Surf 8AM (Sat 21st Mar)4.5ft (1.4m) 14s
Most Powerful 2PM (Sun 22nd Mar)6ft (1.9m) 13s

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

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

Short Range Forecast Mostly dry. Warm (max 30°C on Wed afternoon, min 21°C on Fri night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Sun night, min 18°C on Sun night). Winds increasing (light winds from the S on Sat morning, strong winds from the SSE by Sat night).

Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
1
0
1
2
2
2
2
1
0
0
0
0
1
1
0
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
SW
0.9
SW
0.8
WSW
0.9
SW
1.1
SW
1
SW
0.9
WSW
1.2
SW
1.2
SW
1.3
WSW
1.2
WSW
1.8
SW
1
WSW
1
WSW
1.6
SW
1.3
WSW
1.2
WSW
1.3
SW
0.9
WSW
2
SSW
1.3
SW
Period(s) (?)1212121215141313141413814131313131212611
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2202091771954963903095176066074793953843627845554375282510437
Wind
(km/h)
10
NNE
25
SSW
15
SSE
5
WSW
20
S
10
SSE
0
SSW
25
SSW
15
S
20
S
35
SSW
35
S
30
SSE
45
SSW
35
SE
25
SSE
40
S
30
SE
20
S
45
SSW
35
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		cross-
off		offcross-
on		cross-
off		offglasscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
off		cross-
off		offcross-
off		cross-
off		off
High Tide
/ height (m)
10:18AM
0.59
9:32PM
0.72
10:19AM
0.63
10:20PM
0.64
10:32AM
0.70
11:09PM
0.57
10:52AM
0.79
12:05AM
0.50
11:19AM
0.88
11:52AM
0.96
12:33PM
1.01
Low Tide
/ height (m)
3:09PM
0.45
4:07AM
0.37
4:05PM
0.39
4:05AM
0.41
5:06PM
0.37
3:53AM
0.45
6:24PM
0.39
3:19AM
0.47
8:41PM
0.41
12:34AM
0.39
1:31AM
0.35
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Sunrise6:18--6:20--6:20--6:20--6:22--6:22--6:22--
Sunset-6:32--6:30--6:30--6:29--6:27--6:25--6:24-
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
Rain (mm)
---------------------
Temp. °C293026292725252622212122202225212524202121
Feels °C (?)272623272224252322211716151619181918171612
  • 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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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 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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