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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 9 am Wednesday 09 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 Saturday (Jul 12) at 4PM. The primary swell is predicted to be 2.0m and 13s period with a secondary swell of 1.1m and 17s. Another secondary swell of 0.5m and 3s is also forecast. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Cat Bay (Shelly Beach) in the next 12 days are 3.5m 16s and forecast to arrive on Thursday (Jul 10) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 12th Jul) | 6.5ft (2.0m) 13s |
| Best Surf | 4PM (Sat 12th Jul) | 6.5ft (2.0m) 13s |
| Most Powerful | 7PM (Thu 10th Jul) | 11ft (3.5m) 16s |
Table - best surf conditions forecast for Cat Bay (Shelly Beach) over the next 12 days.
Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | 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) (?) | 17 | 16 | 14 | 13 | 11 | 15 | 14 | 14 | 11 | 13 | 13 | 16 | 15 | 14 | 12 | 13 | 13 | 12 | 12 | 13 | 12 | 12 | 12 | 13 | 14 | 13 | 19 | 14 | 17 | 17 | 16 | 16 | 15 | 14 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 3702 | 2704 | 1503 | 1162 | 3449 | 3517 | 2023 | 3007 | 1546 | 1802 | 2210 | 2295 | 1459 | 1412 | 5168 | 5324 | 2012 | 1140 | 918 | 1233 | 1555 | 1694 | 1797 | 2391 | 2868 | 3314 | 4552 | 7091 | 8975 | 8667 | 4766 | 3738 | 2400 | 1987 | 1456 | 995 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | on | cross- on | cross | cross- on | cross- on | cross | cross- on | on | on | on | on | on | cross | cross- off | cross | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross- on | on | on | cross- on | on | on | cross- on |
High Tide / height (m) | 10:34AM 1.97 | 9:38PM 1.81 | 11:32AM 2.03 | 10:38PM 1.80 | 12:25PM 2.11 | 11:37PM 1.82 | 1:12PM 2.19 | 12:34AM 1.87 | 1:54PM 2.27 | 1:28AM 1.93 | 2:32PM 2.34 | 2:19AM 2.00 | 3:08PM 2.39 | 3:09AM 2.08 | 3:43PM 2.41 | 3:59AM 2.15 | 4:19PM 2.41 | 4:49AM 2.20 | 4:56PM 2.39 | 5:41AM 2.23 | 5:35PM 2.35 | 6:36AM 2.24 | 6:17PM 2.29 | |||||||||||||
Low Tide / height (m) | 4:20PM 1.21 | 4:28AM 0.48 | 5:24PM 1.19 | 5:22AM 0.44 | 6:22PM 1.13 | 6:14AM 0.39 | 7:13PM 1.04 | 7:03AM 0.34 | 7:59PM 0.92 | 7:49AM 0.32 | 8:41PM 0.79 | 8:33AM 0.32 | 9:20PM 0.64 | 9:17AM 0.36 | 10:00PM 0.49 | 10:01AM 0.43 | 10:40PM 0.36 | 10:46AM 0.53 | 11:22PM 0.24 | 11:34AM 0.66 | 12:07AM 0.17 | 12:24PM 0.79 | 12:56AM 0.13 | |||||||||||||
Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||||||||||||
| Sunrise | 7:35 | - | - | 7:35 | - | - | 7:35 | - | - | 7:35 | - | - | 7:35 | - | - | 7:33 | - | - | 7:33 | - | - | 7:33 | - | - | 7:33 | - | - | 7:31 | - | - | 7:31 | - | - | 7:31 | - | - |
| Sunset | - | 5:12 | - | - | 5:13 | - | - | 5:14 | - | - | 5:14 | - | - | 5:15 | - | - | 5:15 | - | - | 5:15 | - | - | 5:16 | - | - | 5:17 | - | - | 5:17 | - | - | 5:19 | - | - | 5:20 | - |
 |  |  |  |  |  | | |  | | |  | | | | | | | | | | | | | | | | |  | | | | | | | | |
Rain (mm) | - | - | 6 | 3 | 3 | 1 | - | 1 | - | - | - | - | - | 1 | 5 | - | 2 | - | - | 1 | - | - | 1 | 6 | 2 | 4 | 7 | 1 | - | - | - | - | - | - | - | - |
| Temp. °C | 11 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 13 | 12 | 15 | 12 | 15 | 16 | 11 | 11 | 10 | 9 | 12 | 12 | 11 | 13 | 13 | 12 | 13 | 13 | 12 | 12 | 13 | 12 | 12 | 13 | 13 | 14 | 15 | 14 |
| Feels °C (?) | 3 | 1 | 1 | 1 | 1 | 5 | 5 | 5 | 6 | 6 | 11 | 6 | 5 | 5 | -3 | 3 | 2 | 1 | 5 | 4 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 4 | 6 | 7 | 6 | 6 | 8 | 6 | 8 | 7 |
Short Range Forecast: Moderate rain (total 14mm), heaviest on Wed night. Very mild (max 13°C on Fri morning, min 9°C on Wed morning). Winds decreasing (near gales from the WSW on Thu morning, moderate winds from the W by Fri night). | Days 3-6 Weather Summary Light rain (total 8mm), mostly falling on Sun night. Very mild (max 16°C on Sun afternoon, min 8°C on Mon night). Winds increasing (moderate winds from the NW on Sat afternoon, gales from the W by Sun night). | Days 6-9 Weather Summary Heavy rain (total 21mm), heaviest during Thu night. Very mild (max 13°C on Wed morning, min 10°C on Tue morning). Mainly strong winds. | Long Range Forecast: Some drizzle, heaviest during Fri morning. Very mild (max 15°C on Sun afternoon, min 11°C on Fri morning). Mainly strong winds. | |||||||||||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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.
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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