Surf Forecasts:
Avalon-South surf forecast from 14 Aug 2026:
- Best quality surf: Monday 17 Aug, 7AM (local time) - 3.5ft (1.1m), 7s period, SE swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 4ft (1.2m), 10s period, ESE swell with 275 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 7AM (local time) - 3.5ft (1.1m), 7s 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 Monday (Aug 17) at 7AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.8m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Avalon-South in the next 16 days are 1.2m 10s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 9s period and expected on Saturday (Aug 15) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 17th Aug) | 3.5ft (1.1m) 7s |
| Best Surf | 7AM (Mon 17th Aug) | 3.5ft (1.1m) 7s |
| Most Powerful | 4PM (Wed 19th Aug) | 4ft (1.2m) 10s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, Rusty here. Let's take a look at what's on offer for the coming days.
Honestly, for the next week and a bit, it's a pretty grim picture. We're looking at a long stretch of small, weak, and messy conditions. The first real glimmer of anything surfable doesn't pop up until Wednesday the 19th, and even then it's a struggle. After that, there's another gap until the very end of the forecast period, where things get wild.
The first spot worth paddling out for is Avalon-South, but it's a rough start. On Wednesday the 19th, the morning session is the only real window early on. We get a tiny bit of glassy conditions with a light WNW wind, offering up some 2ft swell from the ESE. The period is a decent 10 seconds, but the energy is still moderate (211). The water is about 63°F, which is pretty normal for this time of year. It's surfable, but don't expect anything special. It's a beginner-friendly spot, but you'll be working for those small, clean waves.
Then we hit a huge dry spell. The rest of that week and into the next is just all poor conditions with tiny, weak swell. The wind is mostly onshore or cross-onshore, and the wave energy is almost non-existent. You'd be better off checking the wind forecast for kites.
Now, hold onto your boards, because the real standout is a long-range promise. On Sunday the 30th of August, the whole setup changes. The morning brings a very significant 10ft swell from the SSE, with a long 11-second period. The combined energy is a staggering 2390, which is very strong. The wind is a bit of a letdown, coming from the SE at 15 km/h, making it cross-onshore and choppy. This is a big, powerful swell, definitely one for experts only. It's a long wait, but if it holds, this will be the one to watch. The afternoon is similar, with 10ft swell and 1762 energy, but still with that cross-onshore wind.
So, to be honest, the best bet is to be patient. The morning of the 19th is your only real chance for a mediocre paddle in the near term. The real event is that Sunday the 30th, but it's a long way off and the wind could mess it up. Keep your eyes on that one.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Sat night. Very mild (max 16°C on Sat afternoon, min 12°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Very mild (max 19°C on Thu morning, min 13°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | ENE 9 | ENE 10 | ENE 10 | SE 6 | ESE 6 | SE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | SE 7 | ESE 10 | ESE 7 | ENE 6 | E 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 18 | 19 | 139 | 73 | 91 | 83 | 96 | 81 | 93 | 104 | 104 | 108 | 275 | 139 | 70 | 110 | 167 | 108 | 105 | 54 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | cross-on | on | cross-on | cross-on | on | on | on | glassy | glassy | on | cross-off | cross | cross-on | cross-off | cross-off | cross-off | off |
High Tide | 10:02PM1.53m | 10:40AM1.36m | 10:44PM1.37m | 11:22AM1.36m | 11:27PM1.21m | 12:05PM1.34m | 00:13AM1.06m | 12:54PM1.30m | 1:08AM0.94m | 1:50PM1.27m | 2:20AM0.87m | 2:55PM1.26m | 3:43AM0.85m | ||||||||
Low Tide | 3:50PM0.23m | 4:27AM0.10m | 4:40PM0.28m | 5:01AM0.19m | 5:31PM0.36m | 5:35AM0.29m | 6:27PM0.43m | 6:12AM0.38m | 7:32PM0.49m | 6:55AM0.47m | 8:48PM0.52m | 7:50AM0.53m | 10:06PM0.50m | ||||||||
 | |  | |  | | | |  |  | | |  | |  | | |  | |  | | |
 | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — |
 | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — |
mm | 2 | 1 | 2 | 1 | — | 4 | 2 | 2 | 6 | — | — | 4 | — | — | — | — | — | — | — | 3 | 1 |
Temp °C | 15 | 16 | 15 | 16 | 16 | 16 | 15 | 15 | 15 | 16 | 16 | 15 | 17 | 16 | 15 | 19 | 17 | 16 | 18 | 16 | 15 |
Feels °C | 12 | 13 | 13 | 13 | 12 | 13 | 12 | 13 | 12 | 13 | 14 | 14 | 14 | 14 | 13 | 16 | 14 | 14 | 15 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 19 | S 17 | S 8 | S 7 | ESE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | SE 7 | ESE 10 | ESE 7 | ENE 6 | E 7 | ENE 7 | ENE 7 | ENE 7 | NE 7 |
| kJ | 230 | 61 | 95 | 35 | 124 | 68 | 58 | 96 | 81 | 93 | 91 | 95 | 103 | 275 | 139 | 70 | 110 | 167 | 108 | 105 | 54 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 10 | ENE 10 | S 18 | S 12 | S 11 | S 10 | S 9 | S 8 | S 11 | S 11 | ESE 12 | ESE 10 | S 8 | — | SE 7 | ESE 8 | S 12 | S 11 | SE 7 | N 4 |
| kJ | 17 | 18 | 19 | 150 | 66 | 182 | 116 | 76 | 35 | 57 | 56 | 104 | 108 | 12 | — | 51 | 7 | 3 | 10 | 2 | 1 |
Swell 3 Height (m) Direction Period (s) | S 19 | SE 8 | — | ENE 10 | S 14 | SSE 7 | SSE 7 | SSW 13 | SE 10 | E 10 | ESE 14 | S 10 | S 9 | — | — | — | S 14 | S 8 | — | S 11 | S 10 |
| kJ | 66 | 2 | — | 20 | 36 | 25 | 29 | 53 | 28 | 8 | 104 | 47 | 14 | — | — | — | 4 | 1 | — | 9 | 8 |
Wind waves Height (m) Direction Period (s) | S 9 | S 8 | S 7 | SE 6 | ESE 6 | SE 6 | ESE 7 | — | — | — | — | — | — | — | — | — | — | — | WNW 2 | NW 3 | WSW 4 |
| kJ | 343 | 245 | 152 | 139 | 73 | 91 | 83 | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 19 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 45 | 3 | 7 | 132 | 10 | 7 | 45 | 45 | 5 | 45 | 0 | 0 | 161 | 0 | 1 | 47 | 0 | 0 | 0 | 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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