Portsea Back Beach surf break

Portsea Back Beach surfForecast / VIC – Mornington Peninsula / Australia

information circle12 Day Weather and Surf, issued 10 pm Friday 20 Feb 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
18.5° C
(Which is slightly warmer than usual)


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 Saturday (Feb 21) at 8AM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 0.4m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Portsea Back Beach in the next 12 days are 2.5m 16s and forecast to arrive on Monday (Feb 23) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Thursday (Feb 26) at 11PM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Sat 21st Feb)5ft (1.6m) 13s
Best Surf 5AM (Tue 24th Feb)8ft (2.5m) 15s
Most Powerful11PM (Mon 23rd Feb)8ft (2.5m) 16s

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 Moderate rain (total 16mm), heaviest on Sun night. Warm (max 23°C on Fri night, min 15°C on Sun night). Winds increasing (calm on Sat morning, strong winds from the SW by Sun night).

Days 3-6 Weather Summary Mostly dry. Warm (max 21°C on Tue afternoon, min 14°C on Mon night). Winds increasing (calm on Tue morning, fresh winds from the ESE by Thu afternoon).

Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Fri
27
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
2
1
3
3
1
0
1
1
4
4
0
0
0
0
1
2
2
0
1
0
Swell
Height Map
Wave Height (m) & direction (?)
1.8
SW
1.4
SW
1.6
SW
1.4
SW
1.3
SW
1.2
SW
1.6
SW
1.8
SW
2.3
SW
2.5
SW
2.3
SW
2
SW
1.7
SW
1.8
SW
1.7
SW
1.8
SW
1.6
SW
1.5
SW
1.3
SW
1.1
SW
1
SW
Period(s) (?)14131312121271316161514131313131313121212
Wave
Graph
(?)Metric surfscale
Energy kJ (?)115269486557450339621310532612322722781558102111449911053878732555367272
Wind
(km/h)
25
SW
10
SSE
20
SSE
15
NE
15
N
25
NNW
25
SW
15
SSW
20
SSE
20
ESE
5
W
25
S
20
S
20
S
30
S
20
S
20
SE
35
ESE
35
E
20
ENE
20
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
crossoffcross-
off
cross-
off
oncross-
on
cross-
on
cross-
off
glasscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscross-
off
cross-
off
cross-
off
cross
High Tide
/ height (m)
3:14AM
1.35
3:35PM
1.36
3:45AM
1.39
4:20PM
1.43
4:16AM
1.42
5:04PM
1.46
4:48AM
1.44
5:50PM
1.46
5:22AM
1.43
6:38PM
1.42
6:01AM
1.40
7:32PM
1.35
6:46AM
1.34
Low Tide
/ height (m)
9:01PM
0.27
9:27AM
0.28
9:42PM
0.30
10:02AM
0.18
10:21PM
0.35
10:38AM
0.11
10:59PM
0.42
11:17AM
0.06
11:38PM
0.50
11:59AM
0.05
12:20AM
0.59
12:46PM
0.08
1:07AM
0.67
1:39PM
0.14
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Fri
27
Sunrise-6:54--6:56--6:56--6:58--6:58--7:01--7:01-
Sunset--8:13--8:12--8:09--8:08--8:07--8:06--8:05
clear
clear
clear
clear
light rain
light rain
rain showers
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
Rain (mm)
----4210--------------
Temp. °C231820202122171616151721171617151719181722
Feels °C (?)211817181723111212111620131312121414121419
  • 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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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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