Portsea Back Beach Surf Break

Lat Long: 38.33° S 144.69° E

Portsea Back Beach Surf Forecast and Surf Report

Issued: 3 am 27 Jul 2026 (local time)

Forecast update in  hr  min

Today's Portsea Back Beach sea temperature is
13.5° C
0.4° 

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 26 Jul 2026:

  • Best quality surf: Saturday 1 Aug, 4PM (local time) - 5ft (1.6m), 16s period, SW swell with offshore winds.
  • Most powerful swell: Wednesday 29 Jul, 1PM (local time) - 15ft (4.5m), 16s period, SW swell with 10,393 kJ wave energy.
  • Next surfable swell (1★+): Friday 31 Jul, 10PM (local time) - 4.5ft (1.3m), 12s 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 Friday (Jul 31) at 10PM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.4m and 20s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Portsea Back Beach in the next 16 days are 4.5m 16s and forecast to arrive on Wednesday (Jul 29) at 1PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Tuesday (Jul 28) at 7AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Fri 31st Jul)4.5ft (1.3m) 12s
Best Surf 4PM (Sat 1st Aug)5ft (1.6m) 16s
Most Powerful 1PM (Wed 29th Jul)15ft (4.5m) 16s

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


Short Range Forecast

Moderate rain (total 12mm), heaviest on Tue afternoon. Very mild (max 16°C on Mon afternoon, min 7°C on Tue night). Winds increasing (light winds from the NNW on Mon morning, near gales from the WSW by Wed morning).

Days 4-6 Weather Summary

Mostly dry. Very mild (max 14°C on Sat afternoon, min 9°C on Sat morning). Wind will be generally light.

Monday
27
Tuesday
28
Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
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
0
0
0
0
0
0
0
0
0
1
1
1
3
3
4
4
2
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
SW
11
1.6
SW
11
1.6
SW
13
1.6
SW
13
1.9
SW
15
2.3
SW
14
4.5
SW
16
4
SW
15
3
SW
14
2.3
SW
13
2.1
SW
13
1.7
SW
12
1.5
SW
12
1.3
SW
12
1.3
SW
12
0.8
SW
18
1.6
SW
16
2.1
SW
19
1.9
SW
17
1.7
SW
16
2
SW
16
Wave Graph
Metric surfscale
Energy kJ
466
600
905
851
1568
2232
9775
7950
3621
1730
1395
874
624
486
546
396
1215
2887
1972
1492
1884
Wind (km/h)
15
NNW
25
N
40
N
40
NNW
40
NW
45
WNW
50
WSW
45
SW
30
WSW
25
W
25
SW
15
W
15
W
10
SSW
5
NE
15
NNE
5
ENE
20
N
30
N
25
N
30
N
Wind State
cross-off
cross-off
cross-off
cross-off
cross
cross
on
on
on
cross-on
on
cross-on
cross-on
cross-on
glassy
cross-off
off
cross-off
cross-off
cross-off
cross-off
High Tide
8:36PM1.20m
10:56AM1.29m
9:38PM1.16m
11:52AM1.32m
10:44PM1.14m
12:39PM1.36m
11:48PM1.16m
1:20PM1.40m
00:46AM1.20m
1:56PM1.42m
1:38AM1.25m
2:29PM1.44m
2:26AM1.31m
Low Tide
3:19PM0.92m
3:37AM0.38m
4:37PM0.89m
4:34AM0.36m
5:50PM0.83m
5:32AM0.33m
6:45PM0.74m
6:25AM0.30m
7:28PM0.65m
7:13AM0.29m
8:05PM0.56m
7:57AM0.29m
8:39PM0.48m
part cloud
cloud
part cloud
part cloud
light rain
rain showers
light rain
rain showers
light rain
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:26
7:26
7:26
7:24
7:24
7:22
7:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:28
5:28
5:29
5:30
5:30
5:31
5:32
 mm
3
1
3
2
3
Temp °C
15
16
13
15
13
9
12
11
10
11
12
11
12
12
12
11
14
12
13
15
13
Feels °C
11
10
6
6
4
-2
1
1
3
5
6
7
9
9
10
8
9
7
6
8
7
  • 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 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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