Cathedral Rock surfForecast / WA – Rottnest Island / Australia

information circle48hr Weather and Surf, issued 1 am Monday 18 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
21.9° 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 8AM is: 1.2m 11s primary swell from a West-southwest direction and 0.5m 19s secondary swell from a West direction (forecast issued at 01:00am May 18). The wind direction is predicted to be cross-shore.

Time (AWST) & DateWave HeightWave Period
Morning (18 May)4ft (1.2m)11s
Afternoon (18 May)4ft (1.2m)11s
Evening (18 May)3ft (0.9m)17s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Warm (max 22°C on Tue afternoon, min 17°C on Mon morning). Wind will be generally light.

Monday
18
Tuesday
19
Wednesday
20
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
5 AM
8 AM
11 AM
2 PM
5 PM
8 PM
11 PM
Rating
(10 max)
2
1
1
2
2
2
2
3
3
3
1
1
3
3
3
1
0
0
1
2
3
3
3
3
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
1.3
WSW
11
1.2
WSW
11
1.2
WSW
11
1.2
WSW
11
1.2
WSW
11
1.2
SW
11
0.8
WSW
18
1.4
SW
11
0.9
WSW
16
0.9
WSW
16
1.1
WSW
16
1.2
WSW
16
1.2
WSW
16
1.2
WSW
15
1.3
WSW
15
1.3
WSW
15
1.6
WSW
15
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.3
WSW
13
1.3
WSW
13
Wave Graph
Metric surfscale
Energy kJ
386
329
329
323
326
347
382
439
475
452
575
671
662
604
706
669
1091
956
956
956
899
837
577
606
Wind (km/h)
5
SE
5
NE
10
NE
10
ENE
10
S
20
S
20
S
20
SE
15
SE
10
NE
20
NE
15
NE
5
SW
10
SSW
15
ESE
20
NNE
25
NNE
20
N
15
NNE
15
NNE
5
NW
15
S
20
SSE
20
SSE
off
cross
cross
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross
cross
glassy
cross-off
cross-off
cross
cross-on
cross-on
cross-on
cross
glassy
cross-off
off
off
High Tide
9:53AM1.25m
10:31AM1.25m
11:08AM1.19m
Low Tide
7:56PM0.44m
9:14PM0.44m
10:28PM0.43m
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:27
5:27
5:25
Temp °C
18
18
17
17
18
18
18
18
17
17
17
18
21
22
21
20
20
19
19
19
20
20
20
20
18
18
16
16
18
16
15
15
15
16
14
15
20
19
18
16
15
14
16
16
19
17
17
17
Swell 1
Height (m)
Direction
Period (s)
1.3
WSW
11
1.2
WSW
11
1.2
WSW
11
1.2
WSW
11
1.2
WSW
11
1.2
SW
11
1.3
SW
11
1.4
SW
11
1.3
WSW
11
1.3
WSW
11
1.3
WSW
11
1.2
WSW
11
1.1
WSW
11
1.2
WSW
15
1.3
WSW
15
1.3
WSW
15
1.6
WSW
15
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.5
WSW
14
1.3
WSW
13
1.3
WSW
13
Energy kJ
386
329
329
323
323
347
382
439
411
386
379
353
302
604
706
669
1091
956
956
956
899
837
577
606
Swell 2
Height (m)
Direction
Period (s)
0.4
WSW
20
0.4
WSW
20
0.5
W
19
0.6
WSW
18
0.7
WSW
18
0.7
WSW
18
0.8
WSW
18
0.9
WSW
17
0.9
WSW
16
0.9
WSW
16
1.1
WSW
16
1.2
WSW
16
1.2
WSW
16
1
WSW
11
0.9
WSW
10
0.9
WSW
11
0.7
WSW
16
0.7
WSW
16
Energy kJ
127
127
188
249
326
326
348
409
475
452
575
671
662
247
173
180
266
263
Swell 3
Height (m)
Direction
Period (s)
Energy kJ
Wind waves
Height (m)
Direction
Period (s)
0.5
S
3
0.4
NNE
3
0.3
N
3
0.3
N
3
Energy kJ
5
3
2
1
Nearest Offshore or Glassy
Rating
(10 max)
2
2
3
2
2
2
3
3
3
3
3
4
3
3
3
3
4
3
3
3
3
3
3
3
Distance (km)
0
1
1
0
0
144
64
0
0
0
1
1
0
0
0
1
7
7
1
1
0
0
0
0
Best forecast wave conditions in Rottnest Island
Rating
(10 max)
3
2
3
3
3
3
3
3
3
4
3
3
3
3
4
3
3
3
3
3
3
3
Best forecast wave conditions in Australia
Rating
(10 max)
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Header Global
Rating
(10 max)
6
4
4
5
7
5
4
5
4
4
4
4
4
4
4
4
4
4
4
5
4
4
5
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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