Cathedral Rock surfForecast / WA – Rottnest Island / Australia

information circle48hr Weather and Surf, issued 7 am Wednesday 20 May 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
21.7° C
(Which is normal for this time of year)

How big are the waves at Cathedral Rock today?

The current surf forecast for Cathedral Rock at 11AM is: 1.5m 14s primary swell from a West-southwest direction and 0.3m 3s secondary swell from a North-northwest direction (forecast issued at 07:00am May 20). The wind direction is predicted to be cross-onshore.

Time (AWST) & DateWave HeightWave Period
Morning (20 May)5ft (1.5m)14s
Afternoon (20 May)5ft (1.5m)14s
Evening (20 May)4ft (1.2m)13s

Table - waves today at Cathedral Rock. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Some drizzle, heaviest during Thu night. Warm (max 21°C on Wed afternoon, min 13°C on Fri night). Winds increasing (calm on Wed afternoon, fresh winds from the SSW by Thu afternoon).

Wednesday
20
Thursday
21
Friday
22
Sat
23
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
2 AM
Rating
(10 max)
0
1
1
2
3
3
3
3
3
3
2
1
0
0
1
1
1
2
3
2
1
2
1
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.4
WSW
14
1.2
WSW
13
1.2
WSW
13
1.5
WSW
14
1.6
WSW
14
1.7
WSW
14
1.7
WSW
14
1.7
WSW
14
1.7
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
13
1.4
WSW
13
1.7
WSW
13
1.7
SW
13
1.3
WSW
13
1.3
WSW
13
1.6
SW
13
1.5
WSW
12
1.5
WSW
12
Wave Graph
Metric surfscale
Energy kJ
956
956
956
899
735
506
491
917
1047
1240
1240
1223
1138
854
829
805
690
1030
981
560
551
864
636
605
Wind (km/h)
25
NNW
15
NNW
15
NNE
5
N
5
SSW
10
SSE
10
SE
10
SE
10
SE
15
S
15
SSW
25
SSW
40
SSW
40
S
35
S
30
S
35
S
30
SSE
25
SSE
25
S
30
S
30
SE
20
ESE
20
E
cross-on
on
cross-on
cross-on
glassy
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
off
cross-off
cross-off
High Tide
11:08AM1.19m
11:43AM1.09m
12:13PM0.96m
Low Tide
10:28PM0.43m
11:30PM0.43m
00:14AM0.44m
clear
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
clear
clear
clear
cloud
rain showers
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:03
7:03
7:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:25
5:25
5:24
5:24
1
Temp °C
20
20
19
20
21
21
20
20
19
19
19
20
18
18
18
18
17
16
15
16
17
18
17
14
15
18
16
19
21
19
18
19
18
17
17
16
12
11
10
11
10
10
10
11
11
11
12
9
Swell 1
Height (m)
Direction
Period (s)
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.4
WSW
14
1.2
WSW
13
1.2
WSW
13
1.5
WSW
14
1.6
WSW
14
1.7
WSW
14
1.7
WSW
14
1.7
WSW
14
1.7
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
13
1.4
WSW
13
1.7
WSW
13
1.7
SW
13
1.3
WSW
13
1.3
WSW
13
1.6
SW
13
1.5
WSW
12
1.5
WSW
12
Energy kJ
956
956
956
899
735
506
491
917
1047
1240
1240
1223
1138
854
829
805
690
1030
981
560
551
864
636
605
Swell 2
Height (m)
Direction
Period (s)
0.6
WSW
16
0.8
WSW
16
1.3
WSW
7
1.3
WSW
7
1.3
SW
7
0.1
W
18
Energy kJ
201
333
178
159
165
6
Swell 3
Height (m)
Direction
Period (s)
0.1
W
18
Energy kJ
6
Wind waves
Height (m)
Direction
Period (s)
0.5
N
3
0.4
NNW
3
0.3
NNW
3
1
SW
4
1.8
SW
6
1.1
S
5
0.7
SSE
4
1.1
SW
7
1.2
SSW
7
0.4
SE
3
0.4
ESE
3
Energy kJ
5
4
2
36
244
57
21
115
123
2
3
Nearest Offshore or Glassy
Rating
(10 max)
3
3
3
3
3
3
3
3
3
3
4
3
3
3
3
3
3
4
3
2
2
3
3
3
Distance (km)
144
1
1
1
0
0
0
0
0
0
64
472
144
144
144
144
29
64
0
144
144
28
3
3
Best forecast wave conditions in Rottnest Island
Rating
(10 max)
3
3
3
3
3
3
3
4
4
3
3
3
Best forecast wave conditions in Australia
Rating
(10 max)
4
4
4
4
4
4
4
4
5
4
4
4
4
4
4
4
4
4
4
7
5
5
5
5
Header Global
Rating
(10 max)
4
5
5
5
5
4
4
5
5
5
5
5
5
5
4
4
4
4
5
7
7
7
7
5
  • 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

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