Surf Forecasts:
Avalon-South surf forecast from 23 Aug 2026:
- Best quality surf: Monday 24 Aug, 7AM (local time) - 3.5ft (1.1m), 5s period, NE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 4PM (local time) - 5ft (1.5m), 7s period, NE swell with 229 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 7AM (local time) - 3.5ft (1.1m), 5s 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 Monday (Aug 24) at 7AM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.2m 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 7s and forecast to arrive on Tuesday (Aug 25) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 8s period and expected on Thursday (Aug 27) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 24th Aug) | 3.5ft (1.1m) 5s |
| Best Surf | 7AM (Mon 24th Aug) | 3.5ft (1.1m) 5s |
| Most Powerful | 4PM (Tue 25th Aug) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Rusty here. Let me tell you straight up – it’s been a rough stretch in Avalon. Don’t come down here expecting much to ride for a good long while.
Looking at the whole picture, we’ve got a pretty grim run ahead. For the next two full weeks, from Sunday the 23rd of August right through to Monday the 7th of September, the surf is either flat, weak, or blown out. There’s no standout session in this entire 16-day window, so we’re just gonna take it day by day and call it as it is.
Kicking off Sunday morning (23rd), we’ve got a tiny, weak little pulse from the NE. Swell is a pathetic 1 ft with a period of 6 seconds – that’s just wind chop with no push. The combined energy is barely a whisper at (15). There’s a light cross-on breeze, so it’s not even clean. Not worth a paddle.
Through the rest of that week, from Monday (24th) to Saturday (29th), it stays small and ugly. You’ll see the swell bump up to around 4 ft on Tuesday (25th), and the energy climbs into the moderate range (270), but it’s a short-period, messy NE wind swell with a strong cross-on wind. Wednesday morning (26th) cleans up a bit with a cross-off from the SSW, but the swell drops back to 4 ft from the ENE and just isn’t doing anything. Thursday and Friday mornings (27th & 28th) go glassy, which is a tease, but the swell is only 2 ft and weak – total lack of grunt.
Saturday morning (29th) you might get a bit of hope. We’ve got a SSE swell at 3 ft with a 9-second period, and the wind is light cross-off. Combined energy is (180). It’s clean, but it’s still very ordinary – a knee-high dribbler that won't get your heart racing.
The first week of September is more of the same. Sunday the 30th and Monday the 31st offer clean mornings with tiny, forgettable energy in the (46-131) range. The water temp is sitting at 63°F, which is just about normal for this time of year, so no shock there.
Tuesday the 1st of September brings a weird one – a tiny E swell at 2 ft but a 10-second period in the morning with clean conditions. The energy is low (69), but that longer period might give a few more lined-up bumps on the sandbanks. Then it gets trashed by a cross-on wind in the afternoon. Wednesday the 2nd morning goes glassy again with a 2 ft E swell, same story.
Honestly, from here all the way to the 7th, it’s just a dead zone. The swell never tops 4 ft, periods are either short or just average, and most of the time the wind is wrong. The energy values stay weak to moderate, mostly in the two-digit or low three-digit range.
There is no session you should set your alarm for. Avalon-South just isn't producing anything rideable for a solid two-and-a-half weeks. If you’ve got a kite, the Tuesday (25th) with that 5 ft NNE windswell and cross wind might be more your thing, but for a surfboard, you're looking at a long dry spell.
Keep the wax in the bag and wait for a proper swell to show up. Forecasts can change, but right now, it’s a wait-and-see situation.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Tue night. Warm (max 23°C on Tue morning, min 13°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Wed morning. Very mild (max 17°C on Fri morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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) | NE 6 | ENE 9 | NE 4 | NE 5 | NE 5 | NE 6 | NE 6 | NE 7 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 8 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 |
Wave Graph | |||||||||||||||||||||
9 | 52 | 29 | 45 | 70 | 178 | 150 | 229 | 164 | 162 | 130 | 76 | 52 | 54 | 88 | 58 | 75 | 137 | 119 | 96 | 73 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross | cross-off | cross-off | cross | cross | glassy | on | glassy | glassy | on | cross-off | cross-off | cross-on | cross-off |
High Tide | 4:58PM1.34m | 5:47AM0.93m | 5:46PM1.40m | 6:30AM1.00m | 6:27PM1.47m | 7:07AM1.08m | 7:04PM1.52m | 7:41AM1.15m | 7:40PM1.55m | 8:15AM1.23m | 8:15PM1.55m | 8:49AM1.30m | 8:51PM1.52m | ||||||||
Low Tide | 10:09AM0.54m | 11:58PM0.38m | 11:07AM0.49m | 00:37AM0.31m | 11:56AM0.43m | 1:12AM0.24m | 12:39PM0.37m | 1:43AM0.18m | 1:19PM0.32m | 2:14AM0.13m | 1:59PM0.28m | 2:44AM0.10m | 2:39PM0.25m | 3:15AM0.10m | |||||||
6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — | 6:18 | — | — | 6:16 | — | — | |
— | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | |
mm | — | — | — | — | — | — | — | 5 | 7 | 2 | 1 | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 17 | 17 | 16 | 20 | 19 | 17 | 23 | 17 | 16 | 16 | 16 | 15 | 16 | 15 | 15 | 17 | 16 | 16 | 16 | 16 | 14 |
Feels °C | 14 | 14 | 14 | 17 | 15 | 15 | 20 | 16 | 15 | 14 | 13 | 14 | 14 | 12 | 14 | 16 | 14 | 16 | 14 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 8 | S 10 | S 10 | S 10 | NE 6 | NE 6 | NE 7 | NE 8 | ENE 8 | ENE 8 | S 8 | S 8 | S 8 | S 11 | S 9 | S 8 | SSE 10 | SSE 9 | SSE 9 | SSE 9 |
320 | 157 | 247 | 123 | 96 | 124 | 97 | 151 | 164 | 162 | 130 | 280 | 320 | 187 | 303 | 196 | 91 | 137 | 119 | 96 | 73 | |
Swell 2 Height (m) Direction Period (s) | NE 6 | S 13 | NE 8 | ENE 8 | S 18 | S 10 | S 10 | S 10 | S 9 | S 16 | S 11 | ENE 8 | ENE 8 | ENE 8 | S 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 |
9 | 222 | 18 | 6 | 25 | 72 | 45 | 28 | 14 | 42 | 9 | 76 | 52 | 54 | 68 | 58 | 56 | 44 | 61 | 67 | 68 | |
Swell 3 Height (m) Direction Period (s) | S 17 | E 14 | E 14 | S 17 | E 13 | ENE 10 | NE 9 | S 16 | S 16 | — | S 14 | — | S 15 | S 15 | ENE 9 | S 14 | SSE 10 | S 12 | SSW 11 | S 10 | S 10 |
23 | 4 | 4 | 22 | 3 | 9 | 23 | 19 | 46 | — | 15 | — | 4 | 38 | 88 | 35 | 75 | 44 | 39 | 32 | 8 | |
Wind waves Height (m) Direction Period (s) | E 4 | ENE 9 | NE 4 | NE 5 | NE 5 | NE 6 | NE 6 | NE 7 | NNW 3 | SW 3 | S 6 | — | — | — | — | — | NE 3 | NE 4 | SSW 2 | S 4 | S 4 |
6 | 52 | 29 | 45 | 70 | 178 | 150 | 229 | 1 | 6 | 106 | — | — | — | — | — | 2 | 17 | 1 | 12 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 10 | 1 | 2 | 2 | 187 | 1 | 1 | 1 | 0 | 0 | 45 | 0 | 0 | 10 | 0 | 0 | 90 | 0 | 0 | 7 | 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.











