Portsea Back Beach Surf Forecast

/ VIC – Mornington Peninsula (24 breaks) / Victoria (127 breaks) /

Australia (828 breaks) / Lat Long: (38.33° S 144.69° E)

Surf Forecasts:

Portsea Back Beach surfForecast / VIC – Mornington Peninsula / Australia

12 Day Weather and Surf, issued 9 am Friday 19 Sep 2025 AEST

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 13.5° 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 Friday (Sep 26) at 10AM. The primary swell is predicted to be 2.5m and 15s period with a secondary swell of 0.5m and 15s. 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 4.5m 14s and forecast to arrive on Saturday (Sep 20) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Friday (Sep 19) at 4PM.

Wave Type	Time (AEST) & Date	Wave Height & Period
Next good surf (1 star+)	10AM (Fri 26th Sep)	8ft (2.5m) 15s
Best Surf	10AM (Fri 26th Sep)	8ft (2.5m) 15s
Most Powerful	7AM (Sat 20th Sep)	15ft (4.5m) 14s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Light rain (total 5mm), mostly falling on Fri night. Very mild (max 19°C on Fri afternoon, min 7°C on Fri night). Mainly strong winds.									Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Mon morning. Very mild (max 13°C on Wed morning, min 10°C on Mon morning). Winds decreasing (strong winds from the SSW on Mon afternoon, light winds from the W by Wed afternoon).
	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	2	0	0	0	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	WSW	SW	WSW	SW	WSW	SW	SW	WSW	WSW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW
Period(s) (?)	12	12	11	14	13	13	12	12	12	13	14	14	14	13	13	17	15	16	15	16	16
Wave Graph (?)
kJ (?)	456	442	1967	6834	5478	2326	1860	2664	2571	2824	4185	4011	2528	1933	1247	1399	2725	2567	3062	4819	3678
Wind (km/h)	N	WNW	WNW	W	W	WNW	WNW	W	WNW	WSW	SSW	S	SSW	SSW	WNW	SW	SW	WNW	WNW	WSW	W
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- on	cross- on	cross- on	cross- on	cross	cross	cross- on	cross- on	on	on	cross- on	cross- on	on	cross- on	on	on	cross- on	cross	cross- on	cross- on
High Tide / height (m)			8:42PM 1.14	10:19AM 1.20		10:15PM 1.15	11:23AM 1.23		11:36PM 1.22	12:12PM 1.28		12:36AM 1.31	12:52PM 1.33		1:24AM 1.39		1:28PM 1.37	2:05AM 1.45		2:00PM 1.40	2:43AM 1.49
Low Tide / height (m)		2:56PM 0.74	3:26AM 0.43		4:27PM 0.66		4:50AM 0.45	5:37PM 0.55		5:57AM 0.43	6:27PM 0.43		6:49AM 0.42		7:08PM 0.33	7:31AM 0.42		7:45PM 0.26	8:08AM 0.43		8:18PM 0.21

	Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24			Thursday 25
Sunrise	6:16	-	-	6:15	-	-	6:13	-	-	6:11	-	-	6:09	-	-	6:09	-	-	6:07	-	-
Sunset	-	6:14	-	-	6:15	-	-	6:15	-	-	6:15	-	-	6:16	-	-	6:17	-	-	6:19	-

Rain (mm)	-	-	3	1	-	-	-	1	-	4	2	-	-	-	-	-	-	-	2	2	3
Temp. °C	18	19	8	11	12	12	15	13	11	11	11	11	11	11	11	13	13	12	12	12	11
Feels °C (?)	10	13	0	4	4	4	7	6	6	2	1	1	5	5	6	9	10	8	4	7	8

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for VIC - Mornington Peninsula

Wind Update The wind is still cross-off at Portsea Back Beach (moderate winds from the NNW at Point Wilson 29 km from Portsea Back Beach). 1.0m 11s groundswell from the WSW with a 0.2m 9s swell from the S. 2 swells combining to make bigger set waves.
1 hour 33 minutes ago Portsea Back Beach

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29 km away, 1 h 33 min ago

26 km/h

NNW

0.0

13.5

Air / Water (°C)

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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.

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.