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Surf Forecasts:

Cat Bay (Shelly Beach) surf break

Cat Bay (Shelly Beach) surfForecast / VIC – Phillip Island / Australia

information circle12 Day Weather and Surf, issued 3 am Monday 15 Sep 2025 AEST
Forecast update in hr  min  s Forecast update imminent
Cat Bay (Shelly Beach) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cat Bay (Shelly Beach) sea temperature is
13.2° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Cat Bay (Shelly Beach) this week:

The most powerful waves expected at Cat Bay (Shelly Beach) in the next 12 days are 5.0m 14s and forecast to arrive on Saturday (Sep 20) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 4AM (Sat 20th Sep)16ft (5.0m) 14s

Table - best surf conditions forecast for Cat Bay (Shelly Beach) over the next 12 days.

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

Short Range Forecast Light rain (total 8mm), mostly falling on Mon night. Warm (max 22°C on Mon afternoon, min 9°C on Wed night). Winds decreasing (near gales from the N on Mon morning, light winds from the NNE by Mon night).

Days 3-6 Weather Summary Moderate rain (total 14mm), heaviest on Sat night. Very mild (max 19°C on Thu afternoon, min 10°C on Fri afternoon). Winds increasing (moderate winds from the NNW on Thu afternoon, near gales from the W by Fri afternoon).

Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
3
1
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.8
SW
1.6
SW
1.4
SW
1.2
SW
2
WSW
3
WSW
3
WSW
3.5
WSW
2.4
SW
1.6
SW
1.4
SW
1.7
WSW
1
WSW
2
WSW
4.5
WSW
4
SW
3
SW
3
WSW
4.5
SW
4
SW
3
SW
Period(s) (?)161513121213151514131212121113141414131415
Wave
Graph
(?)Metric surfscale
Energy kJ (?)16111020623414106232814836585122528375517822809736602623734993282719168474469
Wind
(km/h)
55
N
45
N
10
NNE
35
NW
40
WNW
45
WNW
35
WNW
20
W
15
NNW
35
NNW
25
NNW
40
NNW
30
NW
40
NW
55
W
40
NW
40
NW
45
W
50
WSW
50
WSW
25
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
ononcross-
on		cross-
on		cross-
on		cross-
on		cross-
on		crossononononononcrosscross-
on		cross-
on		crosscrosscrosscross-
on
High Tide
/ height (m)
4:52PM
2.37
5:57AM
2.35
5:38PM
2.27
6:50AM
2.21
6:28PM
2.14
7:47AM
2.08
7:27PM
2.00
8:52AM
1.98
8:40PM
1.89
10:00AM
1.95
10:02PM
1.85
11:04AM
1.96
11:20PM
1.90
Low Tide
/ height (m)
11:02AM
0.67
11:23PM
0.01
11:49AM
0.78
12:13AM
0.15
12:40PM
0.89
1:07AM
0.32
1:39PM
0.98
2:08AM
0.49
2:50PM
1.02
3:17AM
0.62
4:07PM
0.98
4:30AM
0.70
5:16PM
0.87
Monday
15
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Sunrise6:20--6:18--6:18--6:16--6:15--6:13--6:11--
Sunset-6:08--6:08--6:09--6:10--6:12--6:13--6:14-
clear
clear
light rain
part cloud
rain showers
rain showers
light rain
part cloud
part cloud
clear
part cloud
rain showers
cloud
light rain
light rain
rain showers
cloud
mod rain
rain showers
cloud
part cloud
Rain (mm)
--4-112----1-231-71--
Temp. °C192217151412111212161916161711111313111111
Feels °C (?)7131375436871391081243-103
  • 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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Eyeball surf reportRecent Eyeball Surf Reports for VIC - Phillip Island

  1. weather stationWind Update Wind reports 18 km away suggest it is still onshore at Cat Bay (Shelly Beach) (light winds from the N at Cerberus Automatic Weather Station). 1.0m 14s groundswell from the WSW with a 0.6m 17s long period groundswell from the SW. 2 swells combining to make bigger set waves.

    1 hour 43 minutes ago Cat Bay (Shelly Beach)
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18 km away, 1 h 43 min ago

17 km/h
N
0.0
13.2
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 Cat Bay (Shelly Beach) 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 Cat Bay (Shelly Beach) at:
surf-forecast.com

Information about the Cat Bay (Shelly Beach) Surf forecast

The above surf forecast table for Cat Bay (Shelly Beach) provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Cat Bay (Shelly Beach) can be found by selecting the local surf guide option on the grey menu. Our Cat Bay (Shelly Beach) 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 (Cat Bay (Shelly Beach)) 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 Cat Bay (Shelly Beach) 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.

Cat Bay is 34 km (21 miles) from Mornington. If you plan a holiday in Phillip Island, look for hotels and other accommodation in Mornington. Mornington has rooms for a wide range of budgets as well as car hire and transport links.

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