Portsea Back Beach Surf Break

Lat Long: 38.33° S 144.69° E

Portsea Back Beach Surf Forecast and Surf Report

Issued: 9 pm 24 Aug 2026 (local time)

Forecast update in  hr  min

Today's Portsea Back Beach sea temperature is
13.3°C
0.6° 

Portsea Back Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Portsea Back Beach surf forecast from 24 Aug 2026:

  • Best quality surf: Sunday 30 Aug, 10PM (local time) - 7.5ft (2.3m), 18s period, SW swell with glassy winds.
  • Most powerful swell: Monday 31 Aug, 4AM (local time) - 8ft (2.5m), 18s period, SW swell with 4,348 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 7AM (local time) - 5ft (1.6m), 13s period with SW swell.

Best Forecast Surf Conditions for Portsea Back Beach this week:

The surf forecast for Portsea Back Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 7AM. The primary swell is predicted to be 1.6m and 13s period with a secondary swell of 0.3m and 18s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Portsea Back Beach in the next 16 days are 2.5m 18s and forecast to arrive on Monday (Aug 31) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Sep 01) at 4AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Tue 25th Aug)5ft (1.6m) 13s
Best Surf10PM (Sun 30th Aug)7.5ft (2.3m) 18s
Most Powerful 4AM (Mon 31st Aug)8ft (2.5m) 18s

Table - best surf conditions forecast for Portsea Back Beach over the next 16 days.


Short Range Forecast

Moderate rain (total 18mm), heaviest on Mon night. Very mild (max 15°C on Mon night, min 8°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 12°C on Thu night, min 8°C on Sat morning). Wind will be generally light.

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
3
0
1
0
1
2
3
1
2
1
2
4
1
3
3
2
5
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
13
1.7
SW
13
1.6
SW
13
1.7
SW
14
1.8
SW
14
1.7
SW
13
1.6
SW
13
1.2
SW
12
1.1
SW
13
0.9
SW
19
2.1
WSW
13
2.1
SW
17
1.8
SW
16
1.6
SW
14
1.5
SW
14
1.3
SW
13
1.3
SW
13
1.7
SW
14
2.5
SW
18
Wave Graph
Metric surfscale
Energy kJ
777
969
851
1163
1363
984
802
383
398
546
1442
2454
1552
1109
915
552
529
1115
4329
Wind (km/h)
15
ESE
10
E
5
S
30
SW
20
SW
20
SSW
10
W
10
NW
10
NNE
20
WNW
20
W
20
SSW
15
SSW
5
NNW
10
S
5
NW
10
N
10
SSE
5
NNE
Wind State
cross-off
cross-off
cross-on
on
on
on
cross-on
cross
cross-off
cross
cross-on
on
cross-on
glassy
cross-on
glassy
cross-off
cross-on
cross-off
High Tide
8:59AM1.18m
7:55PM1.11m
10:06AM1.18m
9:09PM1.07m
11:09AM1.20m
10:26PM1.08m
12:01PM1.24m
11:37PM1.13m
12:43PM1.28m
00:36AM1.22m
1:18PM1.33m
1:27AM1.32m
Low Tide
1:53AM0.39m
2:32PM0.84m
2:52AM0.41m
3:52PM0.82m
3:59AM0.41m
5:11PM0.75m
5:06AM0.39m
6:08PM0.65m
6:06AM0.36m
6:51PM0.54m
6:56AM0.34m
7:28PM0.44m
heavy rain
light rain
cloud
part cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:52
6:52
6:50
6:48
6:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:53
5:54
5:55
5:57
 mm
14
4
Temp °C
15
11
12
12
12
12
11
11
14
12
12
12
11
9
10
9
11
12
11
Feels °C
12
10
11
7
7
7
8
8
11
8
9
9
8
7
7
8
9
9
9
  • Map Icons:
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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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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 16 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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