Surf Forecasts:
Avalon-South surf forecast from 9 Sep 2026:
- Best quality surf: Monday 14 Sep, 10PM (local time) - 4.5ft (1.4m), 6s period, NNE swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 10PM (local time) - 4.5ft (1.4m), 6s period, NNE swell with 145 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 10PM (local time) - 1.5ft (0.4m), 20s 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 Thursday (Sep 10) at 10PM. The primary swell is predicted to be 0.4m and 20s period with a secondary swell of 0.2m and 9s. 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 1.4m 6s and forecast to arrive on Monday (Sep 14) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 8s period and expected on Wednesday (Sep 09) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 10th Sep) | 1.5ft (0.4m) 20s |
| Best Surf | 10PM (Mon 14th Sep) | 4.5ft (1.4m) 6s |
| Most Powerful | 10PM (Mon 14th Sep) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a good hard look at what’s coming our way over the next couple weeks. I’ll be straight with you – it’s a pretty grim outlook for a while. We’re looking at a long stretch of small, weak, and often choppy conditions. The first real hint of anything worth paddling out for doesn’t show up until much later in the period.
So, from now through most of the first week and into the second, it’s flat and messy. You’ll see tiny waves, mostly under 2 ft, with short-period slop and a whole lot of onshore or cross-shore wind. There’s a morning on Saturday the 12th that goes totally glassy, but the swell is a pathetic 0.7 ft – you’d be floating more than surfing. That’s the kind of dry spell we’re in.
The real standout for the entire 16-day window is Avalon-South on Sunday the 20th of September morning. After all that nada, we finally get a pulse of swell. Waves will be around 4 ft, coming from the Northeast. The combined swell energy hits 103 (moderate), and here’s the kicker – the wind is light out of the North, giving us a clean, cross-off breeze. It’s not the biggest swell in the world, but for a break that had been starved of energy, this is the best on offer. Crowds are often a factor here, so get there early.
There’s another less certain chance on Monday the 21st of September morning. The swell drops a bit to 3 ft from the ESE, but we get a decent offshore wind from the WNW at 12 mph keeping it clean. The combined energy is 89 (weak). It’s surfable, but the Sunday morning is the better bet.
Stay patient, lads. We’re in a lull, but a clean session on the 20th might just be worth the wait.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Wed morning, min 10°C on Wed night). Winds decreasing (fresh winds from the S on Wed afternoon, calm by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Mon morning, min 14°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
AM | PM | 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) | SE 7 | ESE 13 | ESE 11 | SE 10 | SE 9 | ESE 9 | E 15 | ENE 14 | ENE 13 | ENE 14 | ENE 14 | NE 4 | ENE 13 | NE 4 | NNE 6 | NE 6 | NE 5 | NE 6 | NE 6 | SSE 5 | ENE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 51 | 17 | 47 | 25 | 22 | 7 | 17 | 18 | 18 | 19 | 19 | 21 | 17 | 43 | 123 | 33 | 59 | 98 | 35 | 42 | 17 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross-off | cross | cross-off | cross-off | cross-on | glassy | glassy | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross-off | cross | cross-on | cross-on |
High Tide | 6:46PM1.65m | 7:28AM1.30m | 7:32PM1.63m | 8:07AM1.38m | 8:14PM1.58m | 8:45AM1.44m | 8:55PM1.48m | 9:21AM1.47m | 9:35PM1.36m | 9:57AM1.47m | 10:15PM1.23m | 10:34AM1.44m | 10:56PM1.11m | ||||||||
Low Tide | 12:24PM0.27m | 1:23AM0.03m | 1:14PM0.21m | 2:00AM0.03m | 2:02PM0.17m | 2:35AM0.06m | 2:47PM0.16m | 3:08AM0.11m | 3:32PM0.18m | 3:40AM0.19m | 4:16PM0.23m | 4:11AM0.28m | 5:03PM0.30m | ||||||||
 |  |  | |  | | | |  | | | | | | | | | | | |  | |
 | 6:03 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | 5:56 | — | — | 5:54 | — | — |
 | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 15 | 14 | 14 | 15 | 14 | 16 | 15 | 15 | 17 | 17 | 16 | 20 | 18 | 17 | 24 | 21 | 21 | 18 | 15 | 15 |
Feels °C | 11 | 7 | 6 | 10 | 12 | 12 | 14 | 13 | 15 | 17 | 14 | 14 | 16 | 15 | 15 | 20 | 17 | 19 | 15 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | S 8 | ESE 13 | ESE 11 | SE 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 12 | S 11 | S 10 | S 10 | S 11 | NE 6 | NE 6 | S 11 | NE 6 | NE 6 | NE 6 | S 9 |
| kJ | 133 | 17 | 47 | 25 | 821 | 890 | 618 | 480 | 377 | 418 | 291 | 158 | 138 | 144 | 79 | 33 | 81 | 98 | 35 | 16 | 486 |
Swell 2 Height (m) Direction Period (s) | SE 7 | E 17 | S 25 | S 23 | S 22 | ESE 9 | E 15 | ENE 14 | S 19 | S 19 | S 17 | S 19 | S 16 | ENE 13 | S 10 | S 11 | ENE 13 | S 10 | S 10 | S 9 | NE 5 |
| kJ | 51 | 6 | 12 | 92 | 235 | 7 | 17 | 18 | 27 | 171 | 90 | 114 | 46 | 17 | 136 | 121 | 16 | 48 | 30 | 15 | 7 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 17 | NE 16 | E 9 | SE 9 | S 22 | E 10 | E 9 | ENE 13 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | ENE 13 | — | ENE 12 | ENE 13 | ENE 13 | ENE 13 |
| kJ | 7 | 6 | 10 | 1 | 22 | 37 | 2 | 2 | 18 | 19 | 19 | 16 | 17 | 34 | 17 | 17 | — | 15 | 16 | 17 | 17 |
Wind waves Height (m) Direction Period (s) | WSW 2 | S 8 | S 10 | S 9 | — | — | — | — | — | — | NE 2 | NE 4 | ENE 4 | NE 4 | NNE 6 | — | NE 5 | — | — | SSE 5 | — |
| kJ | 1 | 882 | 2716 | 909 | — | — | — | — | — | — | 1 | 21 | 13 | 43 | 123 | — | 59 | — | — | 42 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 762 | 90 | 3 | 7 | 2 | 2 | 7 | 2 | 2 | 10 | 2 | 11 | 506 | 1 | 2 | 90 | 0 | 178 | 123 | 3 |
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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