Surf Forecasts:
Avalon-South surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 7AM (local time) - 4ft (1.2m), 8s period, ENE swell with offshore winds.
- Most powerful swell: Wednesday 26 Aug, 10AM (local time) - 4.5ft (1.3m), 8s period, ENE swell with 217 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 7AM (local time) - 4ft (1.2m), 8s period with ENE 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 (Aug 26) at 7AM. The primary swell is predicted to be 1.2m and 8s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Avalon-South in the next 16 days are 1.3m 8s and forecast to arrive on Wednesday (Aug 26) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 11s period and expected on Friday (Aug 28) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 26th Aug) | 4ft (1.2m) 8s |
| Best Surf | 7AM (Wed 26th Aug) | 4ft (1.2m) 8s |
| Most Powerful | 10AM (Wed 26th Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, let me break down what we’ve got on the cards for the next couple of weeks.
Honestly, mate, it’s a bit of a lean spell for Avalon-South. The whole 16-day window is looking pretty flat and uninspiring for a proper surf. We’re in a real dry patch right through from Friday the 21st of August until well into the first week of September. There are no standout sessions at all; it’s just a long run of small, weak, or messy conditions.
Starting off, Friday the 21st through to the end of the month barely registers. The swell is tiny, mostly around 1ft to 2ft, with short-period windswell that barely has any push. The combined wave energy is pitiful most days – we’re talking values in the single digits or low double digits (9 to 62), which is just flat-out weak. The wind isn't kind either; it’s a lot of onshore or cross-shore breezes, keeping the surface messy.
There’s a slight pulse of ENE swell around Tuesday the 25th and Wednesday the 26th, pushing the wave height up to 4ft with a bit more energy behind it (217-225). But the timing is rubbish – the wind goes cross-onshore and choppy in the afternoons, and even the mornings are only giving clean-ish conditions with a cross-offshore breeze. The swell period is just 8 seconds, so it’s not a proper groundswell; it’s just a bit of chunky, wind-affected waves.
Thursday morning the 27th holds a glimmer of hope with a glassy 3ft ENE swell (134), but the forecast calls it “surfable but very ordinary.” It’s the closest we get to a decent window, and even then it’s not worth getting excited about. The water temp is 64°F, which is about average for this time of year.
After that, we drop back into the doldrums. The first week of September is a write-off – more tiny 2ft swell, onshore winds, and crossing chop. There’s a flash of SSE swell with a long 15-second period on Saturday the 5th of September, which sounds promising, but it’s only 2ft. That long period on a tiny wave at a beach break means it’ll probably just be a long lull between barely-rideable bumps.
So, the long and short of it: for the next fortnight, there are no true standouts. If you’re desperate for a paddle, Thursday morning the 27th is your best bet for a glassy, small wave session, but keep your expectations real low.
Stay patient, folks. The ocean will come back around.
Rusty
Short Range ForecastMostly dry. Warm (max 21°C on Fri morning, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Warm (max 22°C on Tue morning, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 9 | NE 8 | NE 5 | NE 5 | NE 6 | NE 6 | ENE 7 | NE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 62 | 39 | 18 | 9 | 9 | 9 | 9 | 38 | 18 | 50 | 107 | 96 | 94 | 123 | 151 | 217 | 217 | 165 | 134 | 147 | 120 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | cross-on | glassy | glassy | cross-on | cross | cross | cross-on | cross | cross | cross | cross-off | cross-off | cross-on | cross-off | glassy | on | cross-off |
High Tide | 2:55PM1.26m | 3:43AM0.85m | 4:00PM1.28m | 4:55AM0.88m | 4:58PM1.34m | 5:47AM0.93m | 5:46PM1.40m | 6:30AM1.00m | 6:27PM1.47m | 7:07AM1.08m | 7:04PM1.52m | 7:41AM1.15m | 7:40PM1.55m | ||||||||
Low Tide | 10:06PM0.50m | 9:00AM0.55m | 11:10PM0.45m | 10:09AM0.54m | 11:58PM0.38m | 11:07AM0.49m | 00:37AM0.31m | 11:56AM0.43m | 1:12AM0.24m | 12:39PM0.37m | 1:43AM0.18m | 1:19PM0.32m | 2:14AM0.13m | ||||||||
 |  |  |  | |  | | | | | | | |  |  | | | | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | — | — | — | — | — | — |
Temp °C | 21 | 21 | 17 | 20 | 20 | 16 | 14 | 16 | 16 | 19 | 18 | 17 | 22 | 19 | 16 | 19 | 15 | 14 | 16 | 15 | 14 |
Feels °C | 19 | 18 | 15 | 17 | 17 | 15 | 14 | 14 | 14 | 16 | 14 | 15 | 18 | 16 | 14 | 16 | 12 | 12 | 13 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | ENE 6 | NE 6 | NE 6 | NE 6 | SSW 8 | NE 6 | S 10 | S 8 | S 10 | S 10 | S 10 | ENE 6 | S 10 | ENE 7 | NE 7 | ENE 8 | ENE 8 | S 8 | S 10 | S 9 | S 11 |
| kJ | 62 | 39 | 18 | 9 | 22 | 9 | 361 | 157 | 247 | 165 | 128 | 65 | 45 | 123 | 151 | 217 | 217 | 195 | 340 | 209 | 515 |
Swell 2 Height (m) Direction Period (s) | S 11 | SE 7 | N 4 | SSW 6 | NE 6 | S 4 | NE 6 | S 13 | NE 8 | NE 8 | S 17 | S 10 | ENE 9 | S 10 | S 9 | S 11 | S 11 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 2 | 2 | 1 | 7 | 9 | 2 | 9 | 222 | 18 | 10 | 22 | 68 | 32 | 28 | 15 | 9 | 9 | 165 | 134 | 147 | 120 |
Swell 3 Height (m) Direction Period (s) | — | S 11 | S 10 | S 9 | E 9 | S 4 | S 18 | E 14 | E 14 | S 17 | E 13 | NE 9 | S 16 | S 15 | S 12 | S 15 | S 14 | — | — | S 12 | — |
| kJ | — | 2 | 2 | 6 | 2 | 1 | 24 | 4 | 4 | 22 | 3 | 20 | 19 | 18 | 12 | 19 | 4 | — | — | 102 | — |
Wind waves Height (m) Direction Period (s) | NW 2 | N 3 | W 3 | — | — | SE 3 | — | NE 9 | NE 4 | NE 5 | NE 5 | NE 6 | NE 6 | NNW 3 | NW 3 | WNW 3 | S 3 | — | — | — | — |
| kJ | 1 | 5 | 3 | — | — | 3 | — | 38 | 17 | 50 | 107 | 96 | 94 | 3 | 5 | 2 | 8 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 8 | 178 | 253 | 332 | 57 | 2 | 10 | 2 | 2 | 521 | 1 | 1 | 1 | 1 | 0 | 50 | 0 | 0 | 10 | 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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