Surf Forecasts:
Avalon-South surf forecast from 5 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 1AM (local time) - 3ft (0.9m), 8s period, SE swell with cross-offshore winds.
- Most powerful swell: Wednesday 9 Sep, 7PM (local time) - 10ft (3.0m), 8s period, SSE swell with 913 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 1AM (local time) - 3ft (0.9m), 8s period with SE swell.
Best Forecast Surf Conditions for Avalon-South this week:
The surf forecast for Avalon-South over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Sep 09) at 1AM. The primary swell is predicted to be 0.9m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Avalon-South in the next 16 days are 3.0m 8s and forecast to arrive on Wednesday (Sep 09) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 10s period and expected on Thursday (Sep 10) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 9th Sep) | 3ft (0.9m) 8s |
| Best Surf | 1AM (Wed 9th Sep) | 3ft (0.9m) 8s |
| Most Powerful | 7PM (Wed 9th Sep) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright crew, Rusty here again, but this time in feet and Fahrenheit. The story’s the same: a long, slow 16-day forecast with a whole lot of nothing before a late pulse.
Early on, from the 6th through the 8th, Avalon-South is flat. The 6th has a tiny 2ft NE swell, cross-off wind, total dud. Water temp is around average for the season.
Then Tuesday the 8th morning kicks up to a solid 8ft SSE swell, period hanging at 9 seconds. That’s a proper push, with combined energy at 896 (moderate to strong). But it’s cross-shore and choppy. The afternoon drops to 7ft, still a lot of energy (605), but cross-onshore. 8ft is only for the experienced crew – beginners, stay out.
After that, we hit a dead zone from the 9th to the 17th. Most days are under 3ft, with a mix of glassy starts and onshore mess. There’s a slight bump on the 13th with 136 energy, but the wave is only 1ft. Not worth paddling for.
The real window opens up on Friday the 18th. Morning brings a 5ft SSE swell, 10-second period, clean conditions with a cross-off breeze from the NW. Energy is 356 (moderate). This is the standout. The afternoon holds at 5ft, even cleaner (385 energy). Saturday the 19th keeps it going with 3ft dropping to 3ft, light offshore wind, clean. That Friday-Saturday run is your best play.
Crowds are common at Avalon-South, so don’t expect a solo session, but for this dry spell, it’s the only game in town.
By Sunday the 20th and Monday the 21st, it’s back to tiny, weak surf. The window closes.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 24°C on Sat night, min 14°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Fri morning, min 11°C on Tue night). Winds decreasing (fresh winds from the S on Wed morning, light winds from the SW by Thu night). | ||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | NE 6 | NE 7 | NE 6 | E 10 | E 10 | E 10 | ENE 10 | SSE 9 | SSE 9 | SE 8 | SE 7 | ENE 9 | E 11 | SE 10 | SE 9 | ESE 8 | E 15 | ENE 14 | ENE 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 26 | 22 | 10 | 8 | 8 | 8 | 11 | 888 | 589 | 109 | 38 | 8 | 10 | 25 | 21 | 7 | 17 | 18 | 18 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross-off | glassy | on | cross | cross | cross-on | cross-off | cross-off | cross | cross | cross | cross | off | off | cross-on | cross-off |
High Tide | 3:45AM0.95m | 3:54PM1.48m | 4:59AM1.01m | 5:00PM1.55m | 5:57AM1.10m | 5:56PM1.61m | 6:45AM1.20m | 6:46PM1.65m | 7:28AM1.30m | 7:32PM1.63m | 8:07AM1.38m | 8:14PM1.58m | |||||||
Low Tide | 9:08AM0.46m | 10:57PM0.23m | 10:24AM0.42m | 11:54PM0.14m | 11:28AM0.35m | 00:41AM0.07m | 12:24PM0.27m | 1:23AM0.03m | 1:14PM0.21m | 2:00AM0.03m | 2:02PM0.17m | 2:35AM0.06m | |||||||
 |  | |  | |  |  | | | | |  | | | | | | | | |
 | — | 6:07 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:00 | — | — |
 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — |
mm | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 20 | 18 | 16 | 19 | 17 | 15 | 16 | 16 | 14 | 16 | 14 | 14 | 14 | 13 | 13 | 19 | 16 | 14 |
Feels °C | 21 | 16 | 13 | 14 | 16 | 14 | 11 | 12 | 13 | 12 | 12 | 7 | 8 | 9 | 9 | 11 | 16 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 7 | S 8 | S 10 | S 8 | S 9 | ENE 10 | E 10 | SSE 9 | S 9 | S 9 | ENE 9 | E 11 | SE 10 | SE 9 | S 12 | S 10 | S 10 | S 10 |
| kJ | 26 | 22 | 111 | 1201 | 302 | 304 | 11 | 8 | 589 | 320 | 177 | 8 | 9 | 25 | 21 | 1530 | 962 | 730 | 598 |
Swell 2 Height (m) Direction Period (s) | S 10 | E 11 | NE 6 | NE 7 | NE 7 | E 10 | NE 7 | — | E 10 | SE 8 | SE 7 | S 16 | SSW 16 | S 18 | E 15 | ESE 8 | E 15 | ENE 14 | ENE 13 |
| kJ | 44 | 9 | 10 | 2 | 2 | 8 | 2 | — | 8 | 109 | 38 | 5 | 52 | 58 | 4 | 7 | 17 | 18 | 18 |
Swell 3 Height (m) Direction Period (s) | E 11 | — | E 10 | E 10 | E 10 | NE 7 | — | — | E 10 | ENE 10 | SE 10 | E 17 | NE 16 | S 23 | NE 15 | S 24 | E 10 | E 9 | E 9 |
| kJ | 9 | — | 8 | 8 | 8 | 2 | — | — | 8 | 9 | 4 | 6 | 10 | 42 | 9 | 44 | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | W 3 | SSW 7 | SSW 8 | S 10 | — | — | S 8 | SSE 9 | — | — | NW 3 | S 7 | S 10 | S 10 | S 10 | — | — | — | — |
| kJ | 4 | 132 | 196 | 1545 | — | — | 657 | 888 | — | — | 2 | 569 | 2245 | 1403 | 1484 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 3 | 641 | 3 | 2 | 260 | 195 | 7 | 7 | 0 | 7 | 330 | 7 | 7 | 123 | 2 | 2 | 214 | 2 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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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 16 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.
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