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Portsea Back Beach Surf Forecast
/ VIC – Mornington Peninsula (24 breaks) / Victoria (127 breaks) /
Surf Forecasts:
Portsea Back Beach surfForecast / VIC – Mornington Peninsula / Australia
12 Day Weather and Surf, issued 10 am Saturday 13 Dec 2025 AEDTForecast update in hr min s Forecast update imminent
Portsea Back Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Portsea Back Beach sea temperature is
16.2° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Portsea Back Beach this week:
The surf forecast for Portsea Back Beach over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Dec 17) at 5AM. The primary swell is predicted to be 1.3m and 11s period with a secondary swell of 0.3m and 16s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Portsea Back Beach in the next 12 days are 3.5m 14s and forecast to arrive on Sunday (Dec 14) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Dec 17) at 2AM.
| Wave Type | Time (AEDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 17th Dec) | 4.5ft (1.3m) 11s |
| Best Surf | 5AM (Wed 17th Dec) | 4.5ft (1.3m) 11s |
| Most Powerful | 11PM (Sun 14th Dec) | 11ft (3.5m) 14s |
Table - best surf conditions forecast for Portsea Back Beach over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Mostly dry. Very mild (max 18°C on Sat afternoon, min 12°C on Sun night). Winds increasing (light winds from the WSW on Sat night, strong winds from the SW by Sun afternoon). | Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Thu afternoon, min 12°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||
| 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) (?) | 12 | 14 | 13 | 8 | 12 | 14 | 14 | 13 | 13 | 12 | 12 | 11 | 10 | 10 | 10 | 10 | 12 | 12 | 15 | 14 | 12 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 324 | 387 | 543 | 649 | 3391 | 5216 | 4081 | 3753 | 2207 | 1243 | 872 | 617 | 270 | 200 | 98 | 117 | 193 | 108 | 232 | 323 | 379 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross | cross- on | on | on | on | on | cross- on | cross- on | cross- on | cross | glass | cross- on | cross- on | glass | cross- on | cross- on | glass | cross- on | on |
High Tide / height (m) | 7:00PM 1.20 | 7:09AM 1.34 | 8:00PM 1.17 | 7:48AM 1.28 | 9:05PM 1.15 | 8:29AM 1.23 | 10:12PM 1.17 | 9:14AM 1.20 | 11:19PM 1.22 | 10:05AM 1.17 | 12:18AM 1.28 | 10:59AM 1.15 | 1:08AM 1.35 | ||||||||
Low Tide / height (m) | 12:53PM 0.41 | 12:51AM 0.51 | 1:39PM 0.40 | 1:39AM 0.63 | 2:28PM 0.39 | 2:33AM 0.74 | 3:18PM 0.38 | 3:35AM 0.81 | 4:10PM 0.36 | 4:47AM 0.85 | 5:03PM 0.33 | 6:01AM 0.84 | 5:53PM 0.28 | ||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||
| Sunrise | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:52 | - | - | 5:52 | - | - | 5:52 | - | - |
| Sunset | - | 8:37 | - | - | 8:38 | - | - | 8:39 | - | - | 8:40 | - | - | 8:40 | - | - | 8:42 | - | - | 8:43 | - |
 |  |  | | | | | | | | |  | | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 18 | 16 | 16 | 15 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 21 | 20 | 23 | 26 | 19 | 23 | 19 | 15 |
| Feels °C (?) | 15 | 17 | 11 | 9 | 4 | 4 | 5 | 4 | 5 | 10 | 10 | 11 | 14 | 18 | 19 | 23 | 24 | 19 | 23 | 14 | 11 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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 Portsea Back 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.
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Information about the Portsea Back Beach Surf forecast
The above surf forecast table for Portsea Back Beach provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Portsea Back Beach can be found by selecting the local surf guide option on the grey menu. Our Portsea Back 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 (Portsea Back 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 Portsea Back 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.
Portsea Back Beach is 29 km (18 miles) from Geelong. If you plan a holiday in Mornington Peninsula, look for hotels and other accommodation in Geelong. Geelong has rooms for a wide range of budgets as well as car hire and transport links.
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