Surf Forecasts:
Avalon-South surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10PM (local time) - 5.5ft (1.7m), 9s period, SSE swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 7PM (local time) - 6ft (1.8m), 9s period, SSE swell with 540 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 10PM (local time) - 5.5ft (1.7m), 9s 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 17) at 10PM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.1m and 13s. 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 1.8m 9s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 10s period and expected on Wednesday (Sep 16) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 17th Sep) | 5.5ft (1.7m) 9s |
| Best Surf | 10PM (Thu 17th Sep) | 5.5ft (1.7m) 9s |
| Most Powerful | 7PM (Thu 17th Sep) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Righto, let’s break it down in feet and miles per hour for those who think that way. Rusty here with the outlook for Avalon-South.
Bottom line: it’s a bleak stretch for the first week. From Tuesday the 15th all the way to Monday the 21st, there’s barely a ripple. Swell heights are under 2 feet, mostly tiny windswell with short periods, and combined energy readings are in the low double digits – basically nothing. Winds are cross or cross-onshore most of the time, so it’s messy and flat. Water temp is about 64°, which is normal for this time of year.
You’re looking at an eight-day gap with no real surf before something shows up. On Wednesday the 23rd, a SSE swell pushes up to 6 feet, with combined energy of 680 (moderate) and a period of 10 seconds. But the wind is cross-onshore from the NE at 9 mph, so it’ll be lumpy and choppy. It’s marginal at best.
The only day that might get the blood pumping is Saturday the 26th. Swell from the NE at 6 to 6 feet, with an 8-second period, and combined energy readings climbing to 634 and 709 – that’s moderate to strong energy. Wind is lighter, from the NE at 6 mph, but still cross-onshore. The swell direction is close to the optimum ENE, so shape should be okay. At over 5 feet, this is not for beginners – you’ll want some experience. Rain and storms are possible, but this is the best wave on offer.
Sunday and Monday after that see similar size but messier winds, so quality drops. Overall, it’s a poor run of conditions. The lighter wind on the 26th gives you the cleanest look, but even then, you’ll be dealing with cross-onshore chop. For the experienced crew, that Saturday morning session might be your best shot for some punchy, overhead walls, but expect others to have the same idea.
Keep an eye on it, but don’t hold your breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Tue morning, min 9°C on Wed night). Winds decreasing (fresh winds from the S on Tue afternoon, calm by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat morning, min 16°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 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) | NE 7 | NE 7 | ENE 13 | E 15 | ENE 12 | NE 13 | E 13 | E 13 | NE 13 | E 12 | ESE 7 | NE 4 | S 10 | S 10 | E 12 | NE 11 | ENE 3 | NE 4 | S 5 | E 10 | E 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 75 | 36 | 18 | 6 | 15 | 7 | 3 | 3 | 7 | 3 | 35 | 13 | 0 | 0 | 3 | 5 | 4 | 6 | 39 | 2 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-on | off | cross | cross-on | off | cross-off | on | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross |
High Tide | 10:34AM1.44m | 10:56PM1.11m | 11:14AM1.39m | 11:41PM1.00m | 12:00PM1.32m | 00:37AM0.91m | 12:56PM1.26m | 1:51AM0.85m | 2:05PM1.23m | 3:17AM0.86m | 3:17PM1.24m | 4:27AM0.91m | 4:18PM1.28m | ||||||||
Low Tide | 5:03PM0.30m | 4:43AM0.37m | 5:53PM0.38m | 5:19AM0.45m | 6:52PM0.45m | 6:03AM0.53m | 8:04PM0.49m | 7:05AM0.59m | 9:22PM0.48m | 8:24AM0.61m | 10:27PM0.44m | 9:41AM0.58m | 11:15PM0.37m | ||||||||
 |  |  | | | | | |  | | | | | | | | | | |  |  | |
 | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — | 5:48 | — | — | 5:48 | — | — | 5:46 | — | — |
 | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 22 | 17 | 13 | 13 | 14 | 14 | 15 | 14 | 13 | 20 | 18 | 17 | 26 | 23 | 22 | 25 | 23 | 22 | 18 | 16 | 16 |
Feels °C | 20 | 15 | 6 | 5 | 6 | 7 | 11 | 11 | 12 | 17 | 14 | 17 | 22 | 19 | 19 | 21 | 19 | 19 | 16 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 7 | NE 6 | NE 12 | ENE 12 | NE 13 | S 10 | S 9 | S 9 | S 9 | S 10 | S 9 | S 10 | S 10 | S 9 | S 9 | S 9 | NE 4 | S 10 | S 9 | E 11 |
| kJ | 75 | 36 | 6 | 6 | 15 | 7 | 1290 | 690 | 452 | 388 | 260 | 173 | 158 | 113 | 87 | 60 | 41 | 6 | 29 | 431 | 2 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 9 | ENE 13 | E 15 | — | — | S 19 | S 19 | NE 13 | S 18 | S 18 | NE 4 | S 15 | S 15 | S 17 | S 16 | S 18 | S 10 | NE 4 | NE 5 | NE 11 |
| kJ | 29 | 14 | 18 | 4 | — | — | 28 | 7 | 7 | 106 | 216 | 13 | 42 | 42 | 22 | 20 | 26 | 18 | 3 | 1 | 5 |
Swell 3 Height (m) Direction Period (s) | NE 13 | ENE 13 | S 16 | — | — | — | E 13 | E 13 | S 19 | E 12 | E 12 | S 15 | S 18 | S 18 | E 12 | NE 11 | E 11 | S 7 | S 15 | E 10 | — |
| kJ | 6 | 17 | 5 | — | — | — | 3 | 3 | 7 | 3 | 3 | 115 | 57 | 25 | 3 | 5 | 3 | 8 | 18 | 2 | — |
Wind waves Height (m) Direction Period (s) | SSW 3 | SSE 4 | S 8 | S 10 | S 10 | S 11 | — | — | — | — | ESE 7 | — | WSW 4 | — | N 4 | — | ENE 3 | — | S 5 | — | S 7 |
| kJ | 1 | 18 | 1298 | 2543 | 2541 | 2770 | — | — | — | — | 35 | — | 5 | — | 2 | — | 4 | — | 39 | — | 408 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1314 | 203 | 742 | 742 | 7 | 3 | 10 | 2 | 2 | 10 | 2 | 2 | 47 | 2 | 2 | 65 | 65 | 81 | 203 | 170 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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 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.
Nearest