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Surf Forecasts:

Portsea Back Beach surf break

Portsea Back Beach surfForecast / VIC – Mornington Peninsula / Australia

information circle12 Day Weather and Surf, issued 10 am Wednesday 21 Jan 2026 AEDT
Forecast 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
17.5° 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 Friday (Jan 23) at 5AM. The primary swell is predicted to be 1.1m and 13s period with a secondary swell of 1.0m and 6s. 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 2.3m 16s and forecast to arrive on Wednesday (Jan 21) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Monday (Jan 26) at 11PM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Fri 23rd Jan)3.5ft (1.1m) 13s
Best Surf 5AM (Fri 23rd Jan)3.5ft (1.1m) 13s
Most Powerful 8PM (Wed 21st Jan)7.5ft (2.3m) 16s

Table - best surf conditions forecast for Portsea Back Beach over the next 12 days.

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

Short Range Forecast Mostly dry. Very mild (max 19°C on Fri night, min 13°C on Fri morning). Winds decreasing (strong winds from the SSW on Wed night, light winds from the ESE by Thu night).

Days 3-6 Weather Summary Mostly dry. Warm (max 31°C on Sat afternoon, min 15°C on Sun night). Winds decreasing (fresh winds from the S on Sun afternoon, calm by Mon night).

Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
0
0
0
1
2
0
1
0
1
0
0
0
1
2
0
2
3
0
2
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.4
SW
1.6
SW
1.6
SW
1.4
SW
1.3
SW
1.1
SW
1.1
SW
1.1
SW
0.9
SW
0.8
SW
0.6
SW
0.8
SW
1.2
SW
1.3
SW
1.3
SW
1.3
SW
1.2
SW
1.1
SW
1
SW
0.7
SW
0.9
WSW
Period(s) (?)181616141413131212111116171616151414131816
Wave
Graph
(?)Metric surfscale
Energy kJ (?)12271303117976365844441133022014794371841920875685581404331327458
Wind
(km/h)
20
S
35
SSW
35
SSW
25
S
25
S
20
SE
15
E
20
S
20
ENE
20
NNE
15
ENE
10
WSW
20
SSW
30
SSW
15
S
10
S
25
S
5
SE
5
ENE
25
S
10
SW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		oncross-
on		cross-
on		cross-
on		crosscross-
off		cross-
on		cross-
off		cross-
off		offcross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		glasscross-
off		cross-
on		on
High Tide
/ height (m)
2:04PM
1.12
3:14AM
1.38
2:55PM
1.19
3:46AM
1.40
3:43PM
1.25
4:16AM
1.41
4:29PM
1.30
4:45AM
1.41
5:15PM
1.34
5:15AM
1.41
6:03PM
1.35
5:47AM
1.41
6:55PM
1.34
Low Tide
/ height (m)
8:49AM
0.57
8:30PM
0.18
9:24AM
0.47
9:13PM
0.19
9:57AM
0.39
9:54PM
0.22
10:30AM
0.30
10:33PM
0.28
11:04AM
0.23
11:12PM
0.37
11:41AM
0.17
11:52PM
0.47
12:22PM
0.13
12:35AM
0.57
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Sunrise6:20--6:20--6:22--6:22--6:24--6:24--6:26--
Sunset-8:43--8:43--8:42--8:42--8:40--8:39--8:39-
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
Rain (mm)
---------------------
Temp. °C181816151515141819253130191817171919192019
Feels °C (?)16149789111315202625161415161617201717
  • 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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Latest Updates

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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.

View detailed surf forecast for Portsea Back Beach at:
surf-forecast.com

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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