Surf Forecasts:
Avalon-South surf forecast from 28 Aug 2026:
- Best quality surf: Saturday 29 Aug, 4AM (local time) - 4ft (1.2m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Saturday 29 Aug, 1PM (local time) - 5ft (1.5m), 10s period, SSE swell with 416 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 4AM (local time) - 4ft (1.2m), 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 Saturday (Aug 29) at 4AM. The primary swell is predicted to be 1.2m and 9s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Avalon-South in the next 16 days are 1.5m 10s and forecast to arrive on Saturday (Aug 29) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 9s period and expected on Saturday (Aug 29) at 10AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sat 29th Aug) | 4ft (1.2m) 9s |
| Best Surf | 4AM (Sat 29th Aug) | 4ft (1.2m) 9s |
| Most Powerful | 1PM (Sat 29th Aug) | 5ft (1.5m) 10s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
G’day, I’m Rusty, and here’s the outlook for Avalon-South.
We’re in a pretty quiet stretch for a while, so don’t rush down. The first real chance of something rideable is Saturday morning the 29th of August when a 4ft SSE swell with moderate wave energy (280) rolls in, and the wind goes cross-offshore from the SSW. That’ll keep things clean, but it’s not going to blow your mind – more a beginner-friendly option. Water temp is sitting at 64°, which is pretty much bang on average for this time of year, so nothing unusual there.
Sunday morning the 30th of August drops right off, just 2ft from the SE, but when the wind goes glassy from the WNW, the surface will be like a mirror. The energy is weak (117), so it’s more about the vibe than power – still, if you’re keen for a paddle, it’s surfable.
Then we hit a proper dry spell. From Monday the 31st of August right through to Thursday the 10th of September, it’s mostly flat or tiny – heights under 2ft, and the few little bumps that show have poor conditions with cross-onshore or onshore wind. There’s a couple of clean, offshore moments on the 6th of September, but the swell is only 3ft from the NE, and the energy is still modest (87). Not worth a trip.
Now, here’s the standout. Mark your calendar for Friday the 11th of September – that morning looks promising. We get a 4ft SSE groundswell with a good 12-second period, pushing moderate-to-strong energy (452) into the break. The wind is cross-offshore from the SSW, so expect clean, lined-up waves. This is the best on offer across the whole period. The swell direction is close to the optimum ENE for Avalon-South, and the longer period means better-shaped waves, though at a beach-break setup it can be a bit straight – but still, the quality should be solid.
Saturday the 12th of September morning sees the swell bump up further to 7ft from the SSE with strong energy (919), but the wind turns cross-on from the NNE, so it’ll be a bit lumpy. That size is getting into expert territory – only for the experienced crew.
Forget the rest of the second week; it’s mostly flat or poor.
Overall, if you’re after clean lines, hit Friday morning the 11th of September – that’s the one. The rest is a waiting game.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Mon morning, min 12°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed morning, min 14°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||||
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) | SSE 10 | SSE 9 | SSE 10 | SE 10 | SSE 9 | SE 9 | SE 9 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | SSE 10 | SSE 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 433 | 287 | 251 | 216 | 151 | 88 | 41 | 24 | 17 | 16 | 15 | 23 | 37 | 34 | 34 | 33 | 32 | 31 | 31 | 46 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off |
High Tide | 8:15PM1.55m | 8:49AM1.30m | 8:51PM1.52m | 9:24AM1.36m | 9:28PM1.45m | 10:01AM1.41m | 10:08PM1.36m | 10:41AM1.43m | 10:53PM1.25m | 11:27AM1.44m | 11:46PM1.13m | 12:21PM1.42m | 00:52AM1.02m | |||||||
Low Tide | 2:44AM0.10m | 2:39PM0.25m | 3:15AM0.10m | 3:21PM0.25m | 3:46AM0.12m | 4:06PM0.26m | 4:20AM0.17m | 4:56PM0.28m | 4:58AM0.24m | 5:53PM0.32m | 5:43AM0.32m | 7:02PM0.36m | ||||||||
 |  | |  |  | | | | | | | | | | | | | | | | |
 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 5:32 | — | — | 5:34 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:36 | — | — | 5:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 16 | 15 | 14 | 17 | 16 | 14 | 18 | 17 | 16 | 23 | 24 | 20 | 27 | 26 | 21 | 27 | 25 | 21 |
Feels °C | 12 | 14 | 14 | 14 | 14 | 15 | 14 | 14 | 16 | 14 | 15 | 19 | 20 | 17 | 24 | 23 | 19 | 21 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | SSE 9 | SSE 10 | S 8 | SSE 9 | S 9 | S 9 | S 9 | S 8 | S 11 | S 10 | S 11 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | SSE 10 | SSE 12 |
| kJ | 433 | 287 | 251 | 204 | 151 | 164 | 155 | 288 | 156 | 250 | 177 | 229 | 233 | 178 | 96 | 94 | 73 | 50 | 31 | 46 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | S 8 | SE 10 | S 8 | SE 9 | SE 9 | S 18 | S 16 | S 15 | ENE 9 | ENE 11 | ENE 11 | NE 5 | ENE 10 | ENE 10 | ENE 10 | NE 5 | ENE 10 | ENE 10 |
| kJ | 26 | 25 | 116 | 216 | 105 | 88 | 41 | 150 | 234 | 72 | 15 | 23 | 37 | 28 | 34 | 33 | 32 | 14 | 19 | 19 |
Swell 3 Height (m) Direction Period (s) | S 13 | S 11 | ENE 9 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | E 12 | ENE 8 | N 12 | ENE 10 | NE 5 | NNE 5 | NE 5 | ENE 10 | NE 6 | NE 6 |
| kJ | 30 | 37 | 29 | 28 | 32 | 29 | 24 | 24 | 17 | 16 | 3 | 7 | 3 | 34 | 10 | 11 | 6 | 31 | 8 | 5 |
Wind waves Height (m) Direction Period (s) | S 3 | — | S 9 | — | — | — | — | — | — | NE 3 | NE 3 | NNE 3 | NE 4 | — | NW 3 | NNE 4 | NW 2 | NW 3 | W 4 | WNW 3 |
| kJ | 3 | — | 299 | — | — | — | — | — | — | 2 | 4 | 1 | 29 | — | 2 | 13 | 1 | 5 | 14 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 170 | 3 | 0 | 7 | 0 | 0 | 7 | 2 | 2 | 10 | 2 | 2 | 4 | 1 | 2 | 2 | 2 | 12 | 78 | 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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