
Surf Forecasts:
Avalon-South surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 1PM (local time) - 2.5ft (0.7m), 9s period, ENE swell with offshore winds.
- Most powerful swell: Monday 17 Aug, 4AM (local time) - 7.5ft (2.3m), 8s period, SE swell with 582 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 1PM (local time) - 2.5ft (0.7m), 9s 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 Tuesday (Aug 11) at 1PM. The primary swell is predicted to be 0.7m and 9s 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 2.3m 8s and forecast to arrive on Monday (Aug 17) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 9s period and expected on Thursday (Aug 13) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Tue 11th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 1PM (Tue 11th Aug) | 2.5ft (0.7m) 9s |
| Most Powerful | 4AM (Mon 17th Aug) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s cooking at Avalon-South.
Right now, we’re looking at a pretty quiet run. The water temperature is sitting at 64°F, which is about average for this time of year, so you won’t need a thick wetsuit, but it’s not warm enough to go rashie-only just yet.
The first real chance to get wet comes Tuesday morning, the 11th of August. It’s small, with only 2ft of swell from the east-northeast, and the combined energy is weak (78). What makes it worth a paddle is the clean, glassy conditions with a light offshore wind. The period is short at 9 seconds, so don’t expect much push, but for a beginner-friendly spot, it’s a nice, safe little session. The afternoon holds up with similar size and a cross-offshore breeze, still clean.
After that, things go flat and quiet. From Wednesday the 12th all the way through to Saturday the 22nd of August, it’s mostly poor surf conditions with tiny swell—often below 2ft—and a mix of cross-onshore or onshore winds. There’s a brief spike on Sunday the 16th with 5ft from the south-southeast, but the period is a miserable 6 seconds and the wind is cross-onshore, making it choppy and messy. Not worth paddling out for.
There’s a gap there of over a week with no real recommendations. You’d be better off doing something else.
We finally get a small window again on Sunday the 23rd of August. The morning brings a glassy, clean surface with 3ft from the east-northeast, period 8 seconds, and combined energy still weak (124). It’s very ordinary, but it’s surfable and the conditions are clean. Not a standout, but if you’re desperate, it’s the best you’ll see in a while.
Then Monday the 24th afternoon sees a jump in energy to 324 with a 4ft south-southeast swell, but the period is short (9 seconds) and the wind is cross-onshore, making it choppy. Tuesday the 25th morning has a bit more size (4ft) but again short period and cross-shore wind. Not great.
The very last day, Wednesday the 26th of August morning, actually looks promising. Glassy conditions, 4ft from the east-northeast, period 8 seconds, and combined energy at 193 (moderate). The wind is light and offshore, the surface is clean. It’s not huge, but for a spot that’s been mostly dead, this is the best the forecast has to offer. The swell direction is east-northeast, which matches the optimum for this break, so the waves should have some shape.
If I had to pick one standout, it’s Wednesday the 26th morning. Glassy, clean, and the swell is actually lined up right. Don’t expect barrels, but for a fun, easy session, that’s your window.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Tue morning, min 11°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 16mm), heaviest on Fri night. Very mild (max 16°C on Fri morning, min 13°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 9 | ENE 9 | ENE 10 | ENE 10 | ENE 9 | ENE 10 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | SSE 6 | SSE 7 | SE 7 | ESE 8 | ESE 8 | ESE 8 |
Wave Graph | |||||||||||||||||||||
78 | 78 | 48 | 52 | 52 | 50 | 54 | 35 | 29 | 31 | 30 | 29 | 29 | 18 | 18 | 227 | 277 | 407 | 464 | 372 | 491 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | off | off | cross-off | cross-on | cross-off | off | cross-on | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 7:01PM1.76m | 7:49AM1.19m | 7:50PM1.78m | 8:34AM1.25m | 8:36PM1.75m | 9:17AM1.31m | 9:20PM1.66m | 9:59AM1.34m | 10:02PM1.53m | 10:40AM1.36m | 10:44PM1.37m | 11:22AM1.36m | 11:27PM1.21m | ||||||||
Low Tide | 12:29PM0.27m | 1:50AM-0.01m | 1:22PM0.22m | 2:33AM-0.04m | 2:13PM0.19m | 3:13AM-0.02m | 3:02PM0.19m | 3:51AM0.02m | 3:50PM0.23m | 4:27AM0.10m | 4:40PM0.28m | 5:01AM0.19m | 5:31PM0.36m | ||||||||
6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | |
— | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | — | 3 | 2 | 1 | 4 | 2 | 2 | 3 |
Temp °C | 20 | 20 | 13 | 17 | 19 | 13 | 16 | 16 | 14 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 15 | 16 |
Feels °C | 17 | 17 | 7 | 13 | 14 | 9 | 13 | 13 | 12 | 13 | 12 | 13 | 10 | 10 | 13 | 10 | 10 | 12 | 12 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | S 11 | S 11 | S 10 | S 9 | S 8 | ENE 10 | S 9 | S 8 | S 9 | S 8 | S 7 | ENE 9 | ENE 10 | S 7 | ENE 10 | ENE 10 | ENE 10 | S 10 | S 9 | SSW 9 |
78 | 723 | 584 | 314 | 160 | 86 | 54 | 399 | 159 | 184 | 157 | 150 | 29 | 18 | 187 | 19 | 20 | 19 | 46 | 40 | 15 | |
Swell 2 Height (m) Direction Period (s) | S 12 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 9 | S 11 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 9 | S 15 | S 20 | S 11 | S 16 | S 15 | ENE 10 | ENE 10 | SSW 11 | S 11 |
3 | 78 | 48 | 52 | 52 | 50 | 20 | 35 | 29 | 31 | 30 | 29 | 18 | 8 | 37 | 46 | 39 | 10 | 18 | 24 | 10 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 15 | S 14 | S 13 | S 16 | S 19 | S 13 | S 19 | S 19 | S 16 | S 15 | — | ENE 10 | — | — | S 16 | ENE 9 | — | — |
— | — | — | 4 | 4 | 3 | 5 | 7 | 13 | 29 | 29 | 20 | 4 | — | 18 | — | — | 19 | 17 | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 7 | — | W 4 | WNW 3 | — | W 3 | S 8 | S 9 | — | W 3 | — | — | S 7 | S 7 | — | SSE 6 | SSE 7 | SE 7 | ESE 8 | ESE 8 | ESE 8 |
120 | — | 9 | 4 | — | 8 | 117 | 623 | — | 2 | — | — | 311 | 422 | — | 227 | 277 | 407 | 464 | 372 | 491 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 7 | 2 | 2 | 7 | 3 | 45 | 7 | 7 | 196 | 605 | 96 | 182 | 182 | 47 |
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.











