Surf Forecasts:
Avalon-North surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 4AM (local time) - 3.5ft (1.0m), 7s period, ESE swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 3.5ft (1.1m), 10s period, ESE swell with 235 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 4AM (local time) - 3.5ft (1.0m), 7s period with ESE 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 Tuesday (Aug 18) at 4AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.3m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Avalon-North in the next 16 days are 1.1m 10s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 9s period and expected on Monday (Aug 17) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 18th Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 4AM (Tue 18th Aug) | 3.5ft (1.0m) 7s |
| Most Powerful | 4PM (Wed 19th Aug) | 3.5ft (1.1m) 10s |
Table - best surf conditions forecast for Avalon-North over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s cookin’ for Avalon-North.
Well, I gotta be straight with you – this is one of those stretches where the ocean just ain’t cooperating for a good chunk of the forecast. We’re lookin’ at a real quiet start, with hardly anything worth paddling out for through the first week and a half. The good news? There’s a little glimmer of hope right at the tail end of this 16-day run, but you’re gonna need some patience.
From now through most of August, the swell is tiny – we’re talkin’ knee-high dribble at best, with short, weak periods under 8 seconds and combined energy mostly down in the weak zone (values like 16 to 112). The wind is often on it or side-on, and the reports just say "poor surf conditions" again and again. There’s a glassy window on Wednesday morning the 19th, but the swell is only 2ft from the ESE at a 10-second period, so it’s surfable but very ordinary. You might get a clean little wave on Thursday morning the 20th with a light cross-offshore wind, but again it’s small – 2ft.
We go through a long dry spell. Saturday the 22nd, forget it – 1ft. The whole next week is similar, with tiny swell and not enough push. The water temp is sittin’ around 63°F, which is near enough to average for this time of year, so nothin’ wild there.
Then, on the morning of Wednesday the 27th of August, we finally see a pulse. The swell jumps to 6ft from the NE, with a 7-second period. The combined energy hits a strong 593 (moderate-to-strong), and the wind is a clean cross-offshore from the SW at 15 mph. The report says “expect good surf conditions.” This is the standout. It’s not a monster, but for a stretch that’s been almost flat for days, this will feel like a proper session. Remember though, it’s still a short-period swell, so it’ll be a bit lumpy and less organized than a long groundswell, but for a point break like this one, it should line up alright. The afternoon turns onshore, so get it early.
After that, the swell backs off quickly – Friday the 28th is 3ft and clean but ordinary, and by Saturday it’s back down to 1ft. The very end of the forecast into September is small again.
So the short story: wait it out. If you’ve got a board you don’t mind paddling around on tiny days, the glassy Wednesday the 19th or the clean Thursday the 20th might give you a few fun ones, but the real go is Thursday morning the 27th of August. That’s your best bet. The rest is a whole lot of nothin’.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Mon morning. Very mild (max 17°C on Wed morning, min 13°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Fri night. Warm (max 21°C on Thu morning, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 10 | ESE 10 | SE 9 | ESE 7 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 | NE 9 | ENE 9 | ENE 8 |
Wave Graph | |||||||||||||||||||||
102 | 83 | 96 | 99 | 84 | 100 | 80 | 235 | 81 | 40 | 64 | 51 | 39 | 23 | 14 | 15 | 15 | 13 | 37 | 30 | 28 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | glassy | glassy | cross-on | cross-off | cross-off | cross | cross-off | cross-off | glassy | cross-off | cross-off | cross-on | glassy | cross | cross-on | cross-off |
High Tide | 11:22AM1.36m | 11:27PM1.21m | 12:05PM1.34m | 00:13AM1.06m | 12:54PM1.30m | 1:08AM0.94m | 1:50PM1.27m | 2:20AM0.87m | 2:55PM1.26m | 3:43AM0.85m | 4:00PM1.28m | 4:55AM0.88m | 4:58PM1.34m | ||||||||
Low Tide | 5:31PM0.36m | 5:35AM0.29m | 6:27PM0.43m | 6:12AM0.38m | 7:32PM0.49m | 6:55AM0.47m | 8:48PM0.52m | 7:50AM0.53m | 10:06PM0.50m | 9:00AM0.55m | 11:10PM0.45m | 10:09AM0.54m | 11:58PM0.38m | ||||||||
6:31 | — | — | 6:31 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | |
— | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | |
mm | 2 | — | 3 | 1 | — | — | — | — | — | — | — | — | — | 1 | 5 | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 16 | 16 | 16 | 17 | 16 | 16 | 21 | 19 | 19 | 18 | 16 | 14 | 17 | 16 | 15 | 18 | 18 | 17 |
Feels °C | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 13 | 14 | 18 | 17 | 17 | 16 | 15 | 12 | 14 | 13 | 15 | 15 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | ESE 7 | ESE 7 | ESE 7 | S 11 | ESE 7 | ESE 8 | SE 7 | ESE 10 | NE 5 | ESE 7 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 | S 8 | S 7 | S 10 |
102 | 83 | 96 | 82 | 84 | 92 | 51 | 235 | 50 | 40 | 64 | 51 | 39 | 23 | 14 | 15 | 15 | 13 | 51 | 25 | 51 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 9 | S 8 | E 9 | S 11 | ESE 11 | ESE 10 | S 8 | SE 9 | ENE 5 | E 11 | E 10 | SSW 4 | S 5 | S 5 | SE 4 | S 8 | S 7 | NE 9 | ENE 9 | ENE 8 |
113 | 76 | 49 | 6 | 56 | 100 | 80 | 11 | 81 | 17 | 2 | 2 | 4 | 13 | 8 | 1 | 6 | 9 | 37 | 30 | 28 | |
Swell 3 Height (m) Direction Period (s) | ENE 10 | SSW 13 | S 12 | SE 15 | ESE 14 | S 10 | E 5 | E 9 | S 8 | E 11 | S 14 | S 12 | S 11 | SE 7 | SE 7 | — | S 5 | ENE 8 | S 15 | S 12 | S 6 |
10 | 53 | 24 | 9 | 61 | 46 | 20 | 6 | 5 | 2 | 4 | 3 | 2 | 2 | 2 | — | 1 | 7 | 41 | 26 | 7 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ESE 7 | ENE 5 | — | — | — | NNE 5 | NE 5 | NNE 4 | — | SW 4 | — | NNE 3 | — | — | — | — | N 3 | NW 2 |
— | — | — | 99 | 17 | — | — | — | 64 | 23 | 9 | — | 5 | — | 1 | — | — | — | — | 1 | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 45 | 4 | 31 | 47 | 0 | 0 | 161 | 0 | 0 | 1 | 1 | 7 | 57 | 178 | 253 | 263 | 178 | 2 | 126 | 2 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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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.











