Portsea Back Beach Surf Break

Lat Long: 38.33° S 144.69° E

Portsea Back Beach Surf Forecast and Surf Report

Issued: 3 am 08 Aug 2026 (local time)

Forecast update in  hr  min

Today's Portsea Back Beach sea temperature is
13.1° C
0.3° 

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 7 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 7AM (local time) - 16ft (5.0m), 15s period, WSW swell with cross-shore winds.
  • Most powerful swell: Thursday 13 Aug, 7AM (local time) - 16ft (5.0m), 15s period, WSW swell with 11,356 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 1AM (local time) - 4ft (1.2m), 16s 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 Monday (Aug 10) at 1AM. The primary swell is predicted to be 1.2m and 16s period with a secondary swell of 0.9m and 20s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Portsea Back Beach in the next 16 days are 5.0m 15s and forecast to arrive on Thursday (Aug 13) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 5s period and expected on Sunday (Aug 09) at 4PM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Mon 10th Aug)4ft (1.2m) 16s
Best Surf 7AM (Thu 13th Aug)16ft (5.0m) 15s
Most Powerful 7AM (Thu 13th Aug)16ft (5.0m) 15s

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


Short Range Forecast

Heavy rain (total 26mm), heaviest during Sun night. Very mild (max 14°C on Sat morning, min 8°C on Sun night). Mainly near gales.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Wed afternoon. Very mild (max 13°C on Thu morning, min 9°C on Wed afternoon). Winds decreasing (near gales from the WNW on Wed morning, light winds from the WNW by Thu night).

Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
0
0
4
2
0
0
2
1
1
0
0
0
5
0
7
3
6
4
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
16
1.6
SW
16
1.4
SW
14
1.2
SW
14
1
SW
13
1.2
SW
16
1.9
SW
19
3
SW
17
1.6
SW
16
2.1
SW
14
1.6
SW
14
1.5
SW
17
2.1
SW
16
3.5
WSW
16
5
SW
12
4
SW
16
3.5
SW
16
3.5
WSW
14
3
SW
16
3.5
SW
17
3
SW
16
Wave Graph
Metric surfscale
Energy kJ
1210
1149
833
548
347
729
2612
5343
1194
1736
1033
1267
2269
5284
7483
7665
6315
5153
4772
7251
5277
Wind (km/h)
25
NNE
30
N
30
NNE
45
NNE
50
N
20
ENE
35
NNW
35
WSW
30
W
25
NW
40
NNW
45
N
40
WNW
50
WSW
30
W
35
WNW
25
W
25
NW
20
WNW
20
W
10
W
Wind State
cross-off
cross-off
off
off
cross-off
off
cross-off
on
cross-on
cross-off
cross-off
cross-off
cross
cross-on
cross-on
cross
cross-on
cross
cross-on
cross-on
cross-on
High Tide
5:40PM1.41m
7:25AM1.33m
6:30PM1.37m
8:34AM1.30m
7:35PM1.31m
9:51AM1.29m
8:53PM1.26m
11:07AM1.32m
10:20PM1.25m
12:12PM1.38m
11:43PM1.29m
1:04PM1.43m
00:55AM1.36m
Low Tide
11:58AM0.72m
00:33AM0.21m
12:52PM0.80m
1:32AM0.22m
1:59PM0.85m
2:40AM0.25m
3:23PM0.85m
3:56AM0.26m
4:55PM0.78m
5:14AM0.26m
6:11PM0.66m
6:23AM0.24m
7:09PM0.53m
cloud
cloud
light rain
light rain
cloud
heavy rain
mod rain
rain showers
part cloud
cloud
cloud
rain showers
cloud
rain showers
part cloud
part cloud
clear
part cloud
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:16
7:15
7:13
7:11
7:11
7:09
7:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:38
5:38
5:39
5:40
5:42
5:43
 mm
2
3
11
8
2
2
3
Temp °C
14
14
13
12
13
13
9
13
12
12
12
12
11
9
10
13
13
11
13
13
12
Feels °C
7
8
7
2
4
6
2
6
5
4
3
2
0
-2
2
5
8
6
8
9
8
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Portsea Back Beach:

join our community of surf reporters

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 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.

Nearest locationNearest