Surf Forecasts:
Avalon-South surf forecast from 4 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 1AM (local time) - 5.5ft (1.7m), 10s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 1AM (local time) - 10ft (3.0m), 9s period, SSE swell with 1,215 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 1AM (local time) - 5.5ft (1.7m), 10s period with SSE 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 1.7m and 10s period with a secondary swell of 0.2m and 10s. Another secondary swell of 0.4m and 3s is also forecast. 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 9s and forecast to arrive on Tuesday (Sep 08) at 1AM. 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 9s period and expected on Wednesday (Sep 09) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 9th Sep) | 5.5ft (1.7m) 10s |
| Best Surf | 1AM (Wed 9th Sep) | 5.5ft (1.7m) 10s |
| Most Powerful | 1AM (Tue 8th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, this is Rusty.
I'm not gonna lie to you, the next 16 days are pretty grim for Avalon-South. The swell window is all wrong, and the wind just won't cooperate. We're stuck with a lot of small, weak surf.
We kick off Saturday, 5 September, with a weak 1ft swell from the ENE with a 9-second period. Energy is a paltry 26, and it's a cross-shore breeze. It's flat. The next few days are more of the same – tiny and messy. Monday morning, 7 September, goes glassy with a 0.7ft wave at 10 seconds (energy: 10), but it's too small to ride. The only real spike is Tuesday morning, 8 September, when the swell jumps to 8ft from the SSE. That's big, but with only a 9-second period, it's lumpy and disorganized. Energy hits 872 (moderate), but the cross-shore wind and messy conditions make it a "marginal" call – and at that size, it’s expert-only.
Wednesday morning, 9 September, is the best we get. A 5ft swell from the SSE, 9-second period, energy at 325 (moderate), with light, clean cross-offshore winds from the southwest. That could give you a few clean, rideable walls. But it's not a day to write home about, and by afternoon the wind howls up to 25 mph from the south, blowing it out completely.
After that, it’s back to tiny 0.3ft to 0.7ft waves through the middle of the month. Tuesday, 15 September, offers a 3ft swell from the SSE with a 10-second period and clean wind, but energy is only 259 (weak to moderate). It's "surfable but very ordinary." Friday, 18 September, teases with 3ft at an 11-second period (better shape, longer lulls), energy at 348, but the winds go sloppy cross-onshore again.
No real standouts here. The best window is Wednesday morning, 9 September – clean, 5ft from the SSE, good for a beginner-friendly spot. Water temp is about average for this time of year. That's all there is.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Sat afternoon, min 12°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Very mild (max 17°C on Wed morning, min 10°C on Wed night). Mainly strong winds. | ||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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 7 | ENE 9 | NNE 5 | NE 6 | NE 7 | NE 7 | ENE 10 | E 10 | SSE 8 | SSE 9 | SSE 9 | ENE 10 | SSE 10 | SSE 9 | SSE 9 | NE 16 | E 16 | E 9 | SSE 23 |
Wave Graph  | |||||||||||||||||||
 kJ | 17 | 17 | 83 | 45 | 21 | 11 | 10 | 8 | 184 | 1215 | 863 | 10 | 586 | 322 | 572 | 10 | 5 | 2 | 103 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | off | cross-off | cross | cross-off | glassy | on | cross | cross | on | cross-off | cross-off | cross | cross | cross-off | cross | off |
High Tide | 2:15AM0.95m | 2:40PM1.43m | 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 | |||||||
Low Tide | 7:48AM0.45m | 9:47PM0.31m | 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 | |||||||
 |  |  |  | | | | | | | | | | |  |  | | | | |
 | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — |
 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 16 | 29 | 30 | 24 | 20 | 19 | 16 | 19 | 17 | 15 | 15 | 15 | 14 | 17 | 15 | 14 | 13 | 14 | 14 |
Feels °C | 15 | 25 | 26 | 21 | 16 | 14 | 13 | 16 | 14 | 10 | 12 | 12 | 12 | 14 | 7 | 6 | 8 | 10 | 12 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 9 | NE 5 | NE 6 | NE 7 | S 8 | S 10 | S 8 | SSE 8 | ENE 10 | SSE 9 | SSE 11 | SSE 10 | SSE 9 | NE 9 | S 18 | S 9 | S 10 | S 10 |
| kJ | 52 | 85 | 51 | 45 | 21 | 114 | 1301 | 334 | 184 | 11 | 863 | 1291 | 586 | 322 | 3 | 60 | 961 | 928 | 759 |
Swell 2 Height (m) Direction Period (s) | S 11 | ENE 9 | S 9 | S 10 | E 11 | NE 7 | ENE 10 | NE 8 | SSW 9 | NE 7 | E 10 | ENE 10 | ENE 10 | NNE 4 | S 16 | NE 16 | S 23 | S 23 | SSE 23 |
| kJ | 89 | 17 | 62 | 45 | 9 | 11 | 10 | 2 | 132 | 2 | 9 | 10 | 9 | 1 | 5 | 10 | 90 | 93 | 103 |
Swell 3 Height (m) Direction Period (s) | NE 7 | NE 7 | E 9 | E 11 | S 15 | E 10 | E 10 | E 10 | E 10 | — | — | ENE 10 | NE 9 | E 9 | E 17 | — | E 16 | E 9 | E 15 |
| kJ | 17 | 2 | 7 | 9 | 18 | 9 | 8 | 8 | 8 | — | — | 9 | 3 | 2 | 6 | — | 5 | 2 | 4 |
Wind waves Height (m) Direction Period (s) | — | NNE 4 | NNE 5 | WSW 3 | SSW 7 | SSW 8 | — | — | — | SSE 9 | — | — | NNE 3 | WNW 2 | SSE 9 | S 10 | — | — | — |
| kJ | — | 7 | 83 | 7 | 123 | 202 | — | — | — | 1215 | — | — | 3 | 1 | 572 | 2279 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 2 | 2 | 3 | 3 | 170 | 3 | 2 | 132 | 170 | 3 | 10 | 0 | 0 | 762 | 123 | 3 | 46 | 0 |
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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