- Forecast
- Maps
- Live
- Weather State
- Spot Information
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 3 am Sunday 14 Sep 2025 AEST
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 Sunday (Sep 21) at 7AM. The primary swell is predicted to be 4.5m and 14s period with a secondary swell of 4.0m and 14s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Portsea Back Beach in the next 12 days are 5.5m 14s and forecast to arrive on Sunday (Sep 21) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 5s period and expected on Monday (Sep 15) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 21st Sep) | 15ft (4.5m) 14s |
| Best Surf | 7AM (Sun 21st Sep) | 15ft (4.5m) 14s |
| Most Powerful | 1AM (Sun 21st Sep) | 18ft (5.5m) 14s |
Table - best surf conditions forecast for Portsea Back Beach over the next 12 days.
Short Range Forecast Light rain (total 2mm), mostly falling on Mon night. Warm (max 21°C on Mon afternoon, min 9°C on Tue night). Mainly near gales. | Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Fri afternoon. Very mild (max 19°C on Thu afternoon, min 7°C on Fri night). Winds increasing (light winds from the NW on Wed night, strong winds from the WNW by Fri afternoon). | ||||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| 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 | 13 | 16 | 15 | 13 | 12 | 13 | 15 | 14 | 14 | 14 | 12 | 11 | 12 | 12 | 13 | 13 | 13 | 13 | 14 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 984 | 905 | 919 | 1707 | 1124 | 552 | 658 | 1859 | 4180 | 7125 | 5008 | 1991 | 846 | 445 | 488 | 658 | 1657 | 4769 | 3242 | 2426 | 12191 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross- on |
High Tide / height (m) | 3:48PM 1.47 | 4:59AM 1.52 | 4:28PM 1.44 | 5:50AM 1.44 | 5:12PM 1.38 | 6:46AM 1.34 | 6:06PM 1.29 | 7:50AM 1.26 | 7:16PM 1.20 | 9:03AM 1.21 | 8:42PM 1.14 | 10:19AM 1.20 | 10:15PM 1.15 | ||||||||
Low Tide / height (m) | 10:05AM 0.51 | 10:20PM 0.07 | 10:48AM 0.58 | 11:06PM 0.11 | 11:34AM 0.65 | 11:57PM 0.18 | 12:27PM 0.71 | 12:55AM 0.28 | 1:33PM 0.75 | 2:04AM 0.37 | 2:56PM 0.74 | 3:26AM 0.43 | 4:27PM 0.66 | ||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| Sunrise | 6:24 | - | - | 6:22 | - | - | 6:20 | - | - | 6:20 | - | - | 6:18 | - | - | 6:16 | - | - | 6:15 | - | - |
| Sunset | - | 6:08 | - | - | 6:09 | - | - | 6:10 | - | - | 6:12 | - | - | 6:13 | - | - | 6:14 | - | - | 6:15 | - |
 |  |  | | |  | | |  | |  | | | | | |  | | | | | |
Rain (mm) | - | - | - | - | - | 2 | - | - | - | - | - | - | - | - | - | - | 2 | 1 | - | - | 7 |
| Temp. °C | 19 | 20 | 17 | 20 | 21 | 17 | 16 | 14 | 11 | 13 | 13 | 11 | 17 | 19 | 16 | 19 | 17 | 8 | 13 | 14 | 13 |
| Feels °C (?) | 12 | 14 | 10 | 12 | 10 | 11 | 7 | 5 | 1 | 7 | 8 | 7 | 9 | 13 | 9 | 11 | 8 | 0 | 5 | 6 | 3 |
- Map Icons:
Break
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 - Mornington Peninsula
Cross-shore wind has turned cross-on at Portsea Back Beach (strong winds from the W at SHIP6443 8 km from Portsea Back Beach). A 1.2m groundswell from the SW
1 h 15 min ago
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 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.
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.
Nearest