Surf Forecasts:
Avalon-South surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 1AM (local time) - 5.5ft (1.7m), 6s period, NNE swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 10PM (local time) - 6.5ft (2.0m), 6s period, SSE swell with 300 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 1AM (local time) - 5.5ft (1.7m), 6s period with NNE 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 Monday (Sep 14) at 1AM. The primary swell is predicted to be 1.7m and 6s period with a secondary swell of 1.3m and 6s. 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 2.0m 6s and forecast to arrive on Tuesday (Sep 15) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 10s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 14th Sep) | 5.5ft (1.7m) 6s |
| Best Surf | 1AM (Mon 14th Sep) | 5.5ft (1.7m) 6s |
| Most Powerful | 10PM (Tue 15th Sep) | 6.5ft (2.0m) 6s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, Rusty here again. Gonna lay it out for you in feet and miles.
Honestly, looking at the next sixteen days at Avalon-South, it’s a real quiet stretch. There’s nothing worth paddling out for until we’re well into the forecast.
The first real sign of life doesn’t pop up until Thursday, September 24th. That morning we get a push around 3 ft from the NNE, but it’s a short-period wind swell at 6 seconds, so it’s gonna be pretty lumpy and weak. The energy jumps up to a moderate 121, so there’s some juice, but the wind is light and from the east early, which might keep the surface clean for a bit.
The standout session, the one that’s got the most grunt, is going to be Thursday afternoon the 24th. The swell builds to 6 ft from the NE, and the combined energy surges to 234 – now that’s strong wave energy for this spot. That’s a legitimate size. The problem is the wind swings to the NE at around 12 mph, blowing cross-onshore, which will mess up the face and make it choppy. For pure size and power though, this is the best wave on offer. That 6 ft will be too much for beginners, but for experienced surfers, it’s the only real swell to chase.
Before that, from now all the way through the 23rd, it’s flat or close to it. Tiny heights, short periods, and messy winds. There’s one morning on the 22nd with a light offshore breeze from the west that’ll make it look glassy, but the swell is only about 2 ft with a 5-second period. Not even worth dragging your board down for.
So keep your eyes on Thursday the 24th. The afternoon is your best bet for size, even if it’s a little choppy. Everything before that, just take a rest.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun morning, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 24°C on Mon morning, min 11°C on Wed night). Winds increasing (light winds from the WNW on Mon night, fresh winds from the S by Tue night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 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 15 | ENE 14 | ENE 13 | ENE 14 | ENE 14 | NE 4 | NE 4 | NE 4 | NNE 6 | NE 6 | NE 5 | NE 6 | NE 6 | ENE 6 | ENE 13 | ENE 14 | ENE 12 | ENE 13 | ENE 13 | ENE 13 | E 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 21 | 18 | 18 | 19 | 19 | 17 | 20 | 45 | 239 | 43 | 49 | 71 | 28 | 21 | 18 | 20 | 15 | 17 | 17 | 17 | 13 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | off | glassy | on | cross | cross-on | cross-on | cross-off | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross | cross-off | cross-off | on | off |
High Tide | 8:14PM1.58m | 8:45AM1.44m | 8:55PM1.48m | 9:21AM1.47m | 9:35PM1.36m | 9:57AM1.47m | 10:15PM1.23m | 10:34AM1.44m | 10:56PM1.11m | 11:14AM1.39m | 11:41PM1.00m | 12:00PM1.32m | 00:37AM0.91m | ||||||||
Low Tide | 2:02PM0.17m | 2:35AM0.06m | 2:47PM0.16m | 3:08AM0.11m | 3:32PM0.18m | 3:40AM0.19m | 4:16PM0.23m | 4:11AM0.28m | 5:03PM0.30m | 4:43AM0.37m | 5:53PM0.38m | 5:19AM0.45m | 6:52PM0.45m | ||||||||
 |  |  | | | | | | | | | | | |  | |  |  | | | | |
 | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — | 5:56 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — |
 | — | 5:42 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 16 | 15 | 15 | 18 | 17 | 16 | 19 | 18 | 17 | 24 | 22 | 22 | 19 | 17 | 14 | 13 | 14 | 15 | 15 | 14 | 13 |
Feels °C | 15 | 13 | 16 | 15 | 14 | 14 | 15 | 14 | 15 | 21 | 19 | 19 | 18 | 15 | 8 | 6 | 8 | 10 | 12 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 12 | S 11 | S 10 | S 10 | S 11 | NE 6 | NE 6 | S 11 | NE 6 | NE 6 | ENE 6 | ENE 5 | ENE 14 | ENE 12 | S 11 | S 10 | S 10 | S 9 |
| kJ | 618 | 489 | 332 | 418 | 279 | 158 | 177 | 181 | 122 | 43 | 81 | 71 | 28 | 21 | 3 | 20 | 15 | 1158 | 682 | 499 | 246 |
Swell 2 Height (m) Direction Period (s) | ENE 15 | ENE 14 | S 19 | S 19 | S 17 | S 20 | NE 4 | ENE 13 | S 12 | S 11 | ENE 13 | S 10 | S 10 | S 9 | ENE 13 | — | — | ENE 13 | S 19 | ENE 13 | NE 4 |
| kJ | 21 | 18 | 61 | 184 | 142 | 121 | 9 | 17 | 175 | 125 | 16 | 47 | 28 | 25 | 18 | — | — | 17 | 28 | 17 | 4 |
Swell 3 Height (m) Direction Period (s) | ENE 15 | E 10 | ENE 13 | ENE 14 | ENE 14 | ENE 13 | S 17 | ENE 13 | ENE 13 | ENE 13 | — | ENE 12 | ENE 13 | ENE 13 | S 18 | — | — | — | ENE 13 | S 16 | E 13 |
| kJ | 21 | 2 | 18 | 19 | 19 | 16 | 50 | 17 | 17 | 17 | — | 15 | 16 | 17 | 6 | — | — | — | 17 | 21 | 13 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ENE 2 | NE 4 | NE 4 | NE 4 | NNE 6 | — | NE 5 | — | WSW 3 | SSE 3 | S 8 | S 10 | S 9 | — | — | NE 3 | NNE 4 |
| kJ | — | — | — | — | 1 | 17 | 20 | 45 | 239 | — | 49 | — | 2 | 2 | 836 | 2269 | 1238 | — | — | 2 | 5 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 45 | 2 | 2 | 435 | 2 | 10 | 521 | 0 | 1 | 4 | 0 | 0 | 253 | 268 | 225 | 7 | 3 | 3 | 10 | 2 |
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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