
Surf Forecasts:
Avalon-South surf forecast from 9 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 4AM (local time) - 3ft (0.9m), 9s period, NE swell with offshore winds.
- Most powerful swell: Monday 10 Aug, 10AM (local time) - 7ft (2.1m), 9s period, ENE swell with 691 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 4AM (local time) - 3ft (0.9m), 9s period with NE 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 4AM. The primary swell is predicted to be 0.9m 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 2.1m 9s and forecast to arrive on Monday (Aug 10) 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 2.5m 10s period and expected on Thursday (Aug 13) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 11th Aug) | 3ft (0.9m) 9s |
| Best Surf | 4AM (Tue 11th Aug) | 3ft (0.9m) 9s |
| Most Powerful | 10AM (Mon 10th Aug) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the coming weeks for the surf.
The next sixteen days are a real rollercoaster. You’ve got a brief window of clean, small waves early, then a long stretch of poor conditions, followed by a promising pulse of groundswell right at the end. Patience is the name of the game.
Monday the 10th starts with rain showers and a 7ft ENE swell, but the wind is a stiff cross-off from the NNW at 22 mph, keeping it messy. The combined energy is moderate (691), and the water’s at 64°F, which is about average for this time of year. Not worth suiting up for.
Tuesday the 11th is your best early bet. Morning brings clear skies, a light offshore from the WSW at 9 mph, and the swell drops to 2ft from the NE. The combined energy is weak (86), but the wind is clean, and for a beginner-friendly break like Avalon-South, that’s the kind of small, tidy surf that’s fun on a longboard. The west wind keeps it glassy through the afternoon too.
From Wednesday the 12th through to Sunday the 16th, it’s a grim run. Swell drops to 2ft or less, the wind shifts around, and the energy is weak (down to 18 in the afternoon of the 14th). The conditions are mostly poor, with a few sessions marked as “surfable but very ordinary.” There’s a brief uptick on Saturday the 15th with a short-period 3ft SSE swell, but the wind is cross and sloppy. Not much going on.
Monday the 17th and Tuesday the 18th see a bit more size – 4ft to 6ft from the ESE – but the wind is onshore or cross-onshore, and the combined energy is moderate (up to 374). The period is short (7-8 seconds), meaning weak, chopped-up waves. Honestly, this setup looks more interesting for kite surfing than paddle surfing.
Wednesday the 19th is still marginal, with 5ft to 5ft ESE swell and light cross-onshore winds. The energy is moderate (438-487), but the quality’s not there.
Then we get to the standout. Thursday the 20th morning: clear skies, a light offshore from the WSW at 3 mph, and a 4ft ENE swell with an 8-second period. The combined energy is moderate (355), and the conditions are clean. This is the best of the first two weeks – small, clean, and offshore. Friday the 21st morning is also good: glassy, 5ft E swell, calm wind, and energy (277). Clean waves for the morning session.
But the really interesting stuff arrives late. Monday the 24th through Tuesday the 25th. On Monday the 24th, we get a 6ft SSE swell with a 9-second period, combined energy strong (888), and the wind is a clean cross-off from the NW at 13 mph. The water temp is still around 64°F, normal for the season. Then Tuesday the 25th morning is the big one: a 5ft E swell with a long 12-second period, combined energy strong (790), and a light offshore wind from the SW at 9 mph. That’s groundswell with real push, and the conditions are clean. This is the one to circle – promising, but it’s 15 days out, so keep an eye on the forecasts.
To wrap it up: Tuesday the 11th for a longboard in clean, tiny waves; Thursday the 20th and Friday the 21st mornings for clean, small surf; and Tuesday the 25th morning is the standout for better quality groundswell. The long stretch from the 12th to the 16th is a write-off, and the 17th-18th are better for kites.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon morning. Warm (max 20°C on Tue morning, min 10°C on Tue night). Winds decreasing (strong winds from the NW on Mon afternoon, light winds from the W by Tue morning). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Fri night. Very mild (max 16°C on Thu morning, min 10°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 | NE 9 | ENE 9 | NE 9 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | ENE 9 | ENE 10 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SSE 7 | SE 6 | SSE 6 | ENE 11 | SE 8 | ESE 5 |
Wave Graph | |||||||||||||||||||||
691 | 538 | 154 | 86 | 73 | 71 | 51 | 51 | 49 | 37 | 29 | 31 | 31 | 18 | 18 | 75 | 24 | 89 | 22 | 22 | 34 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | cross | off | cross-off | cross-on | cross-off | cross | cross | cross | cross-off | cross | cross |
High Tide | 6:09PM1.69m | 7:00AM1.12m | 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 | ||||||||
Low Tide | 11:30AM0.33m | 1:02AM0.06m | 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 | ||||||||
6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | |
— | 5:21 | — | — | 5:21 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:23 | — | — | 5:24 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | 2 | 2 | 2 | 1 |
Temp °C | 17 | 14 | 16 | 20 | 20 | 13 | 19 | 19 | 14 | 16 | 15 | 14 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
Feels °C | 9 | 5 | 11 | 16 | 16 | 8 | 15 | 14 | 9 | 11 | 11 | 11 | 13 | 12 | 13 | 12 | 11 | 11 | 12 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | ENE 9 | NE 9 | ENE 9 | NE 9 | S 11 | S 10 | S 9 | S 10 | ENE 9 | S 8 | S 10 | S 8 | S 9 | S 8 | S 8 | SSE 7 | S 6 | SSE 6 | SSW 12 | SE 8 | S 6 |
691 | 538 | 154 | 86 | 814 | 408 | 171 | 148 | 49 | 501 | 782 | 282 | 313 | 283 | 163 | 75 | 41 | 89 | 50 | 18 | 61 | |
Swell 2 Height (m) Direction Period (s) | S 13 | S 13 | E 13 | S 12 | ENE 9 | ENE 9 | ENE 10 | ENE 10 | S 13 | ENE 10 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | S 20 | ENE 10 | ENE 10 | SE 7 | ESE 9 | S 12 | S 11 |
3 | 3 | 3 | 3 | 73 | 71 | 51 | 51 | 3 | 37 | 29 | 31 | 31 | 18 | 127 | 18 | 18 | 12 | 16 | 26 | 64 | |
Swell 3 Height (m) Direction Period (s) | — | — | S 12 | — | — | — | N 4 | S 14 | S 16 | S 16 | — | — | S 16 | S 19 | ENE 10 | S 16 | S 12 | S 14 | ENE 11 | ENE 10 | SE 8 |
— | — | 3 | — | — | — | 1 | 4 | 5 | 5 | — | — | 19 | 29 | 18 | 44 | 11 | 33 | 22 | 22 | 15 | |
Wind waves Height (m) Direction Period (s) | NNW 4 | NW 4 | WNW 4 | SW 6 | — | W 4 | WNW 3 | W 2 | SSW 8 | S 8 | S 10 | — | W 3 | S 8 | — | — | SE 6 | — | S 7 | S 7 | ESE 5 |
50 | 52 | 49 | 123 | — | 9 | 4 | 1 | 235 | 687 | 1021 | — | 1 | 400 | — | — | 24 | — | 240 | 266 | 34 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 135 | 137 | 193 | 0 | 0 | 0 | 2 | 0 | 0 | 3 | 90 | 2 | 2 | 7 | 2 | 3 | 45 | 45 | 3 | 112 | 45 |
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.











