Surf Forecasts:
Avalon-South surf forecast from 7 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 1AM (local time) - 5.5ft (1.7m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 1PM (local time) - 7ft (2.2m), 8s period, SSE swell with 645 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 1AM (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 Wednesday (Sep 09) at 1AM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.2m and 10s. 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 2.2m 8s and forecast to arrive on Tuesday (Sep 08) 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 4.0m 10s period and expected on Wednesday (Sep 09) at 10PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 9th Sep) | 5.5ft (1.7m) 9s |
| Best Surf | 1AM (Wed 9th Sep) | 5.5ft (1.7m) 9s |
| Most Powerful | 1PM (Tue 8th Sep) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Howdy, Rusty here, and I gotta level with you—this outlook for Avalon-South is a rough one. We’re looking at a long stretch of flat, messy conditions with barely a wave worth paddling for. Let’s take it day by day.
We start Tuesday, September 8th, with tiny surf. Morning has 0.7ft from the east at 10 seconds, but a 15 mph cross-shore Southerly wind makes it ugly. Combined swell energy is just 9—weak as dishwater. Tuesday afternoon jumps to 7ft from the SSE at 8 seconds, but with a cross-onshore breeze at 6 mph, it’s lumpy and raw. Energy hits 546, moderate but not clean.
From Wednesday 9th through Monday 14th September, it’s a dead zone. Swell heights mostly under 3ft, periods all over the place, and wind mostly cross or onshore. Saturday 12th morning has 0.7ft from the ENE at a long 14 seconds, clean with a light 3 mph NW breeze—but combined energy is just 19. Barely a ripple.
The first real window comes Wednesday 16th September morning: 4ft from the SSE at 8 seconds, glassy with a Southerly breeze at 3 mph. Combined swell energy is 222, moderate. It’s the only slot in the first nine days that gets a score, and it’s still just “surfable but ordinary.” Water temp is around 65°, near average for the season. For a beginner spot like Avalon-South, you might get a fun little wave, but don’t expect much.
Then another lull until Sunday 20th September morning: 3ft from the NE at 8 seconds, clean offshore wind from the WSW at 6 mph, combined energy of 69—weak but clean.
Wednesday 23rd September morning gives us 4ft from the NE at 6 seconds, clean cross-off wind from the WNW at 6 mph, and moderate energy at 148. Again, surfable but nothing special.
Bottom line: this 16-day outlook is a snoozer. The only half-decent windows are the 16th, 20th, and 23rd mornings, and none of them are standouts. Keep the board waxed but leave it in the car.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Very mild (max 16°C on Tue morning, min 10°C on Tue night). Winds increasing (light winds from the E on Tue afternoon, fresh winds from the S by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sun morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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) | E 10 | SSE 8 | SSE 9 | SE 7 | ESE 13 | ESE 11 | ESE 10 | ESE 9 | E 15 | E 15 | ENE 14 | SSE 9 | ENE 14 | ENE 14 | NE 4 | NE 5 | NE 4 | NE 6 | NE 6 | NE 4 | NE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 9 | 536 | 417 | 53 | 17 | 47 | 38 | 17 | 4 | 4 | 18 | 461 | 19 | 19 | 28 | 10 | 36 | 67 | 21 | 16 | 43 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross | cross-on | cross-off | cross-off | cross-on | cross-off | cross | cross-on | cross-off | cross-off | cross-on | off |
High Tide | 5:56PM1.61m | 6:45AM1.20m | 6:46PM1.65m | 7:28AM1.30m | 7:32PM1.63m | 8:07AM1.38m | 8:14PM1.58m | 8:45AM1.44m | 8:55PM1.48m | 9:21AM1.47m | 9:35PM1.36m | 9:57AM1.47m | 10:15PM1.23m | ||||||||
Low Tide | 11:28AM0.35m | 00:41AM0.07m | 12:24PM0.27m | 1:23AM0.03m | 1:14PM0.21m | 2:00AM0.03m | 2:02PM0.17m | 2:35AM0.06m | 2:47PM0.16m | 3:08AM0.11m | 3:32PM0.18m | 3:40AM0.19m | 4:16PM0.23m | ||||||||
 |  |  | |  |  | | |  | | | | | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | 5:56 | — | — |
 | — | 5:39 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — |
mm | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 13 | 16 | 15 | 15 | 14 | 15 | 14 | 17 | 16 | 15 | 18 | 17 | 15 | 20 | 19 | 17 | 25 | 24 | 22 |
Feels °C | 10 | 13 | 11 | 11 | 7 | 7 | 8 | 9 | 11 | 14 | 14 | 16 | 15 | 14 | 13 | 15 | 14 | 15 | 22 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | E 10 | SSE 8 | SSE 9 | S 8 | ESE 13 | ESE 11 | ESE 10 | S 22 | S 10 | S 10 | S 10 | SSE 9 | SSE 11 | S 11 | S 10 | S 10 | S 10 | NE 6 | S 12 | S 11 | NE 6 |
| kJ | 9 | 536 | 417 | 133 | 17 | 47 | 38 | 335 | 1384 | 942 | 799 | 461 | 460 | 338 | 190 | 158 | 141 | 67 | 175 | 116 | 43 |
Swell 2 Height (m) Direction Period (s) | — | E 10 | E 10 | SE 7 | E 17 | S 26 | S 23 | ESE 9 | E 15 | E 15 | ENE 14 | ENE 13 | S 19 | S 18 | S 19 | NE 5 | S 15 | S 13 | NE 6 | ENE 13 | S 11 |
| kJ | — | 8 | 8 | 53 | 6 | 13 | 93 | 17 | 4 | 4 | 18 | 18 | 109 | 154 | 192 | 10 | 38 | 209 | 21 | 16 | 79 |
Swell 3 Height (m) Direction Period (s) | — | N 9 | N 9 | E 9 | E 17 | — | E 16 | E 15 | E 10 | E 10 | ENE 14 | S 19 | ENE 14 | ENE 14 | ENE 13 | S 16 | ENE 13 | ENE 13 | ENE 13 | — | ENE 12 |
| kJ | — | 2 | 2 | 7 | 6 | — | 5 | 4 | 2 | 2 | 18 | 7 | 19 | 19 | 16 | 48 | 17 | 17 | 17 | — | 15 |
Wind waves Height (m) Direction Period (s) | S 9 | — | — | WSW 2 | S 8 | S 10 | S 9 | S 11 | — | — | — | — | — | ENE 3 | NE 4 | — | NE 4 | — | WNW 3 | NE 4 | — |
| kJ | 1010 | — | — | 1 | 996 | 2920 | 1464 | 1897 | — | — | — | — | — | 10 | 28 | — | 36 | — | 1 | 16 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 123 | 3 | 0 | 0 | 330 | 96 | 0 | 214 | 2 | 3 | 3 | 0 | 2 | 10 | 2 | 10 | 135 | 0 | 2 | 65 | 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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