Surf Forecasts:
Avalon-North surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 5ft (1.5m), 6s period, NE swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 4PM (local time) - 7ft (2.1m), 7s period, SSE swell with 374 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 4AM (local time) - 2.5ft (0.7m), 9s period with SE swell.
Best Forecast Surf Conditions for Avalon-North this week:
The surf forecast for Avalon-North over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 4AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 1.0m and 5s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Avalon-North in the next 16 days are 2.1m 7s and forecast to arrive on Wednesday (Aug 26) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 9s period and expected on Sunday (Aug 23) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 20th Aug) | 2.5ft (0.7m) 9s |
| Best Surf | 10PM (Thu 20th Aug) | 5ft (1.5m) 6s |
| Most Powerful | 4PM (Wed 26th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Avalon-North over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a good, hard look at what Avalon-North is serving up over the next couple of weeks. I'll be straight with you, it's a bit of a tough stretch, but there might be a light at the end of the tunnel.
First up, the overall pattern. We are looking at a long, dry spell to kick things off. From Wednesday the 19th all the way through to the end of August, the surf is pretty much non-existent. We're talking days and days of tiny, weak dribble. The combined wave energy is struggling, with values mostly in the double digits or low triple digits, like a weak 233 (ft). It’s just not doing anything. The water temp is sitting at 64°, which is basically average for this time of year, so no surprises there. For a spot like this, a blank run is just part of the deal sometimes.
We do see a tiny flicker of life on Tuesday the 25th. The morning brings a glassy 5 ft swell from the NE, with the combined energy bumping up to a still-moderate 200 (ft). The wind is calm, which is a huge positive for clean conditions, but the waves are described as "surfable but very ordinary." It’s not a standout by any stretch, just a brief moment where you could get wet without it being a complete battle.
After that, it’s back to the same small, choppy conditions until we hit a massive shift on Wednesday the 2nd of September. Now, this is where things get interesting. A big, long-period groundswell is due to roll in from the SSE. The morning shows a solid 12 ft with a period of 12 seconds and a massive combined energy reading of 3792 (ft). That is a serious amount of power. This is expert territory only—way too big for beginners. The wind is light cross-onshore, so it won’t be perfect, but for an advanced crew at Avalon-North, this is the one to circle on the calendar. Keep in mind, this is a long-range call, so it's promising but not locked in yet. If it holds, expect some serious waves, but that long-period energy can make a point break like this stand up tall and steep.
So, the one true standout in this whole 16-day window is that Wednesday the 2nd of September. The SSE swell, the size, the period, it’s the only real event worth getting excited about. For the rest of the time, the board stays in the car.
Stay salty,
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Fri afternoon. Warm (max 20°C on Thu morning, min 14°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Tue afternoon. Warm (max 24°C on Mon afternoon, min 13°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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) | SE 9 | NE 6 | NE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 | NE 6 | SE 5 | NE 9 | ENE 9 | NE 8 | ENE 6 | ENE 7 | NE 9 | ENE 9 | ENE 9 | SSE 5 |
Wave Graph | |||||||||||||||||||
81 | 69 | 77 | 130 | 51 | 26 | 14 | 9 | 16 | 10 | 22 | 45 | 23 | 37 | 57 | 31 | 96 | 101 | 85 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | glassy | on | glassy | glassy | cross-on | cross-off | cross-off | cross-off | glassy | glassy | cross-on | cross-off |
High Tide | 1:08AM0.94m | 1:50PM1.27m | 2:20AM0.87m | 2:55PM1.26m | 3:43AM0.85m | 4:00PM1.28m | 4:55AM0.88m | 4:58PM1.34m | 5:47AM0.93m | 5:46PM1.40m | 6:30AM1.00m | 6:27PM1.47m | |||||||
Low Tide | 6:55AM0.47m | 8:48PM0.52m | 7:50AM0.53m | 10:06PM0.50m | 9:00AM0.55m | 11:10PM0.45m | 10:09AM0.54m | 11:58PM0.38m | 11:07AM0.49m | 00:37AM0.31m | 11:56AM0.43m | 1:12AM0.24m | |||||||
— | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | |
— | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | |
mm | — | — | — | — | — | 1 | 2 | — | — | 2 | — | — | — | — | — | 1 | 3 | 9 | 11 |
Temp °C | 16 | 20 | 19 | 19 | 17 | 16 | 15 | 16 | 17 | 16 | 16 | 16 | 16 | 23 | 24 | 19 | 14 | 14 | 15 |
Feels °C | 13 | 17 | 16 | 16 | 14 | 13 | 12 | 15 | 15 | 16 | 15 | 14 | 15 | 20 | 22 | 17 | 14 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SE 9 | ENE 6 | SE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 | S 5 | NE 6 | S 10 | S 8 | S 11 | ENE 6 | ENE 7 | S 10 | ENE 9 | ENE 9 | ENE 9 |
81 | 40 | 23 | 130 | 51 | 26 | 14 | 9 | 5 | 9 | 89 | 57 | 55 | 37 | 57 | 94 | 96 | 101 | 67 | |
Swell 2 Height (m) Direction Period (s) | E 12 | ESE 6 | E 10 | S 12 | S 11 | SE 7 | S 10 | S 9 | S 8 | S 8 | NE 9 | S 16 | S 7 | S 9 | S 11 | ENE 6 | S 9 | S 9 | S 16 |
3 | 37 | 2 | 3 | 2 | 2 | 2 | 6 | 12 | 6 | 20 | 42 | 23 | 62 | 79 | 31 | 62 | 39 | 20 | |
Swell 3 Height (m) Direction Period (s) | — | E 11 | — | — | S 11 | S 11 | SE 8 | S 6 | E 9 | E 9 | S 19 | S 19 | NE 8 | NE 8 | NE 8 | NE 9 | S 16 | S 16 | — |
— | 2 | — | — | 2 | 2 | 2 | 1 | 2 | 2 | 7 | 7 | 18 | 15 | 18 | 22 | 21 | 20 | — | |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 6 | NE 6 | — | — | NW 3 | NNW 3 | — | NE 6 | SE 5 | ENE 6 | ENE 9 | NE 4 | — | — | — | SSW 3 | S 4 | SSE 5 |
72 | 69 | 77 | — | — | 4 | 2 | — | 16 | 10 | 22 | 45 | 23 | — | — | — | 1 | 16 | 85 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 1 | 73 | 0 | 2 | 57 | 178 | 253 | 412 | 241 | 1 | 47 | 2 | 2 | 0 | 1 | 0 | 7 | 1 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Avalon-North Surf forecast
The above surf forecast table for Avalon-North provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Avalon-North can be found by selecting the local surf guide option on the grey menu. Our Avalon-North 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-North) 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-North 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-North is 14 km (9 miles) from the city of 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.











