Avalon-South Surf Forecast

/ NSW – Sydney North Coast (39 breaks) / New South Wales (297 breaks) /

Australia (828 breaks) / Lat Long: (33.64° S 151.34° E)

Surf Forecasts:

Avalon-South surfForecast / NSW – Sydney North Coast / Australia

12 Day Weather and Surf, issued 9 am Tuesday 16 Sep 2025 AEST

Forecast update in hr min s Forecast update imminent

Avalon-South surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Avalon-South sea temperature is 18.7° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Avalon-South this week:

The surf forecast for Avalon-South over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 10PM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.1m and 12s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Avalon-South in the next 12 days are 1.2m 8s and forecast to arrive on Wednesday (Sep 17) 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 2.5m 9s period and expected on Tuesday (Sep 23) at 10AM.

Wave Type	Time (AEST) & Date	Wave Height & Period
Next good surf (1 star+)	10PM (Tue 16th Sep)	4ft (1.2m) 7s
Best Surf	10PM (Tue 16th Sep)	4ft (1.2m) 7s
Most Powerful	4AM (Wed 17th Sep)	4ft (1.2m) 8s

Table - best surf conditions forecast for Avalon-South over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Mostly dry. Warm (max 26°C on Tue morning, min 12°C on Wed night). Wind will be generally light.									Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Fri morning, min 10°C on Sat night). Wind will be generally light.
	Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
	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	1	1	0	0	0	0	1	0	0	0	1	0	0	0	0	0	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	NE	NNE	NE	NE	NE	NE	ESE	SE	NNE	NE	NE	NE	NE	NE	NE	NE	NE	NE	NE	ENE	ENE
Period(s) (?)	6	7	8	8	8	7	5	5	5	6	7	6	7	7	7	8	8	8	8	8	8
Wave Graph (?)
Energy (?)	67	96	153	116	84	35	66	44	151	59	63	58	67	52	39	55	27	14	17	26	24
Wind (km/h)	NNW	N	W	W	SE	SW	SSW	E	NW	N	NNE	NNW	W	WSW	W	WSW	ENE	W	SW	SE	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross	off	off	cross- on	cross- off	cross- off	on	cross- off	cross	cross- on	cross- off	off	cross- off	off	off	on	off	cross- off	cross- on	glass
High Tide / height (m)		3:49PM 1.43		5:01AM 1.00	4:55PM 1.46		5:53AM 1.08	5:49PM 1.49		6:36AM 1.16	6:34PM 1.51		7:12AM 1.25		7:14PM 1.49	7:46AM 1.32		7:51PM 1.46	8:17AM 1.38		8:26PM 1.40
Low Tide / height (m)			10:55PM 0.26	10:22AM 0.48		11:49PM 0.21	11:24AM 0.41		12:31AM 0.17	12:15PM 0.35		1:07AM 0.15	1:00PM 0.29		1:39AM 0.14		1:41PM 0.25	2:08AM 0.15		2:20PM 0.23	2:36AM 0.19

	Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22
Sunrise	5:52	-	-	5:52	-	-	5:50	-	-	5:48	-	-	5:48	-	-	5:46	-	-	5:45	-	-
Sunset	-	5:45	-	-	5:45	-	-	5:46	-	-	5:47	-	-	5:47	-	-	5:49	-	-	5:50	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	26	26	21	23	21	16	17	17	15	23	22	18	20	21	13	18	17	15	18	17	16
Feels °C (?)	22	22	19	21	19	12	15	15	13	20	20	16	17	18	9	15	13	14	13	13	15

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 NSW - Sydney North Coast

Wind Update The wind is still cross-off at Avalon-South (light winds from the NNW at Terrey Hills Automatic Weather Station 12 km from Avalon-South). 0.9m 6s windswell from the NNE with a 0.2m 13s groundswell from the E. 2 swells combining to make bigger set waves.
1 hour 13 minutes ago Avalon-South

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1 h 13 min ago

11 km/h

NNW

Cross-Off

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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 Avalon-South 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 Avalon-South Surf forecast

The above surf forecast table for Avalon-South provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Avalon-South can be found by selecting the local surf guide option on the grey menu. Our Avalon-South 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 (Avalon-South) 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 Avalon-South 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.

Avalon-South is 13 km (8 miles) from Dee Why. If you plan a holiday in Sydney North Coast, look for hotels and other accommodation in Dee Why. Dee Why has rooms for a wide range of budgets as well as car hire and transport links.