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Cat Bay (Shelly Beach) Surf Forecast
/ VIC – Phillip Island (20 breaks) / Victoria (127 breaks) /
Cat Bay (Shelly Beach) surfForecast / VIC – Phillip Island / Australia
12 Day Weather and Surf, issued 3 am Thursday 31 Jul 2025 AEST
Best Forecast Surf Conditions for Cat Bay (Shelly Beach) this week:
The surf forecast for Cat Bay (Shelly Beach) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 31) at 10AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 0.4m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Cat Bay (Shelly Beach) in the next 12 days are 2.0m 17s and forecast to arrive on Tuesday (Aug 05) at 10PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Sunday (Aug 03) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 31st Jul) | 3.5ft (1.1m) 13s |
| Best Surf | 1PM (Fri 1st Aug) | 6ft (1.9m) 16s |
| Most Powerful | 10PM (Tue 5th Aug) | 6.5ft (2.0m) 17s |
Table - best surf conditions forecast for Cat Bay (Shelly Beach) over the next 12 days.
Short Range Forecast Mostly dry. Very mild (max 13°C on Sat afternoon, min 9°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Very mild (max 17°C on Mon afternoon, min 9°C on Sun morning). Winds increasing (light winds from the NE on Sun afternoon, fresh winds from the N by Mon night). | ||||||||||||||||||||
Thursday 31 | Friday 01 | Saturday 02 | Sunday 03 | Monday 04 | Tuesday 05 | Wednesday 06 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 15 | 14 | 16 | 14 | 18 | 16 | 16 | 14 | 13 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 474 | 599 | 1645 | 2085 | 1833 | 1773 | 1822 | 1541 | 1163 | 577 | 437 | 420 | 725 | 691 | 888 | 1334 | 2300 | 2185 | 1481 | 894 | 800 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | cross | off | cross- off | cross- off | cross- off | cross | cross- on | cross | cross- on | cross- on | on | on | on | cross- on | on | on | on | on |
High Tide / height (m) | 4:14PM 2.33 | 4:49AM 2.13 | 4:46PM 2.27 | 5:31AM 2.10 | 5:18PM 2.19 | 6:13AM 2.05 | 5:51PM 2.11 | 6:57AM 2.00 | 6:26PM 2.03 | 7:47AM 1.95 | 7:04PM 1.95 | 8:43AM 1.92 | 7:49PM 1.87 | ||||||||
Low Tide / height (m) | 10:03AM 0.56 | 10:36PM 0.37 | 10:42AM 0.67 | 11:13PM 0.36 | 11:20AM 0.78 | 11:49PM 0.38 | 11:58AM 0.89 | 12:26AM 0.41 | 12:39PM 1.00 | 1:06AM 0.45 | 1:24PM 1.10 | 1:52AM 0.49 | 2:19PM 1.19 | 2:44AM 0.51 | |||||||
Thursday 31 | Friday 01 | Saturday 02 | Sunday 03 | Monday 04 | Tuesday 05 | Wednesday 06 | |||||||||||||||
| Sunrise | 7:22 | - | - | 7:20 | - | - | 7:20 | - | - | 7:20 | - | - | 7:18 | - | - | 7:18 | - | - | 7:16 | - | - |
| Sunset | - | 5:29 | - | - | 5:30 | - | - | 5:30 | - | - | 5:30 | - | - | 5:31 | - | - | 5:32 | - | - | 5:34 | - |
 |  |  | | |  | |  | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
| Temp. °C | 11 | 11 | 10 | 10 | 11 | 11 | 12 | 13 | 10 | 13 | 15 | 14 | 15 | 17 | 15 | 14 | 14 | 13 | 14 | 15 | 13 |
| Feels °C (?) | 8 | 7 | 5 | 8 | 7 | 7 | 7 | 7 | 6 | 10 | 13 | 10 | 10 | 12 | 7 | 8 | 9 | 9 | 8 | 10 | 8 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for VIC - Phillip Island
Continuing clean conditions at Cat Bay (Shelly Beach) (light winds from the ESE at Rhyll 16 km from Cat Bay (Shelly Beach)). 0.8m 13s groundswell from the SSW with a 0.3m 21s long period groundswell from the SW. 2 swells combining to make bigger set waves.
16 km away, 1 h 48 min ago
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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.
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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