Surf Forecasts:
Avalon-South surf forecast from 17 Jul 2026:
- Best quality surf: Sunday 19 Jul, 10PM (local time) - 6.5ft (2.0m), 11s period, ENE swell with glassy winds.
- Most powerful swell: Sunday 19 Jul, 7AM (local time) - 7.5ft (2.3m), 11s period, ENE swell with 1,256 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 10PM (local time) - 6.5ft (2.0m), 11s period with ENE 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 Sunday (Jul 19) at 10PM. The primary swell is predicted to be 2.0m and 11s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Avalon-South in the next 16 days are 2.3m 11s and forecast to arrive on Sunday (Jul 19) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 9s period and expected on Thursday (Jul 23) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 19th Jul) | 6.5ft (2.0m) 11s |
| Best Surf | 10PM (Sun 19th Jul) | 6.5ft (2.0m) 11s |
| Most Powerful | 7AM (Sun 19th Jul) | 7.5ft (2.3m) 11s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Alright, let me tell you how it's looking for the coming weeks. I'm lookin' at Avalon-South exclusively for this stretch.
Right off the bat, it's rough out there. We've got a dry spell with nothing really happening. The weekend of July 18th is not happening—on Saturday morning you're lookin' at a weak 4ft of cross-onshore slop from the ESE at a short 6 seconds. The combined energy is a pathetic 108, so basically no push. That trend continues right through the weekend and into Monday morning.
Then, a little glimmer. Monday morning, July 20th, is your standout window. The wind goes glassy from the West at just 3 mph, and we've got a solid 6ft groundswell from the ENE with a period of 11 seconds. That's packing moderate energy at 701, and with the glassy conditions, you're gonna find some clean, lined-up runners. It's a consistent spot, and with the offshore wind direction (W) being cross-off for the optimum ENE swell, it’s set up nicely. Keep in mind, at 6ft it's a bit much for beginners.
After that Monday morning peak, the week settles down. The rest of Monday gets chopped up by a cross-onshore breeze, and by Tuesday and Wednesday the swell drops back under 5ft with energy falling below 400. The wind stays clean on Wednesday morning (July 22) with a light offshore from the West, but the swell is only 4ft and the energy is just 193. It's rideable but ordinary.
From Thursday, July 23rd, onward, it's a slow fade. Swell drops below 3ft, energy craters, and by the end of July into August 1st, we're barely scraping 1ft. There's a weird spike on Saturday evening, August 1st, with a 5ft cross-onshore swell from the SSE, but the rain showers and light cross-onshore wind won't make it pretty. From Monday July 27 onwards, there's a very long period groundswell (18 seconds) but the wave heights are only 0.3ft to 1ft. That energy is too deep and weak to do anything with.
Overall, the pattern is a bit of a downer. The only true standout is Monday morning, July 20th. Get it while it's glassy and clean because the rest of the 16 days is a whole lot of nothing special.
Rusty
Short Range ForecastMostly dry. Very mild (max 17°C on Sat morning, min 11°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu afternoon. Very mild (max 19°C on Wed morning, min 9°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||
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 6 | E 7 | E 8 | ENE 11 | ENE 10 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 108 | 113 | 364 | 1091 | 901 | 808 | 692 | 607 | 442 | 373 | 325 | 312 | 161 | 119 | 90 | 42 | 28 | 15 | 16 | 16 | 7 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | off | cross-on | cross-off | cross-off | cross-on | cross-off | off | cross-on | off | cross-off | cross | off | off | on | off |
High Tide | 11:21AM1.24m | 11:16PM1.49m | 12:10PM1.26m | 00:03AM1.32m | 12:59PM1.27m | 00:53AM1.15m | 1:51PM1.28m | 1:50AM1.02m | 2:46PM1.29m | 2:56AM0.92m | 3:41PM1.31m | 4:08AM0.88m | 4:36PM1.34m | ||||||||
Low Tide | 5:02PM0.34m | 5:51AM0.13m | 6:00PM0.41m | 6:31AM0.22m | 7:03PM0.47m | 7:11AM0.31m | 8:13PM0.51m | 7:54AM0.39m | 9:28PM0.51m | 8:43AM0.45m | 10:38PM0.48m | 9:37AM0.48m | 11:38PM0.43m | ||||||||
 | |  | |  |  | | | | | | | | | | |  | | | | | |
 | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 5:05 | — | — | 5:06 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:08 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 17 | 17 | 17 | 17 | 16 | 15 | 15 | 15 | 14 | 16 | 16 | 15 | 19 | 19 | 16 | 15 | 13 | 12 | 13 | 14 | 12 |
Feels °C | 14 | 14 | 13 | 14 | 14 | 15 | 14 | 13 | 12 | 14 | 14 | 13 | 17 | 17 | 13 | 10 | 7 | 8 | 11 | 10 | 9 |
Swell 1 Height (m) Direction Period (s) | S 10 | E 7 | E 8 | ENE 11 | ENE 10 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 9 | S 10 | S 9 | S 9 |
| kJ | 69 | 113 | 364 | 1091 | 901 | 808 | 692 | 607 | 442 | 373 | 325 | 312 | 161 | 119 | 90 | 42 | 28 | 15 | 900 | 521 | 313 |
Swell 2 Height (m) Direction Period (s) | S 21 | S 10 | S 9 | S 17 | S 16 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 | S 10 | — | — | S 18 | ENE 9 | ENE 9 | ENE 8 |
| kJ | 34 | 45 | 24 | 211 | 176 | 160 | 184 | 134 | 84 | 56 | 50 | 31 | 31 | 19 | 18 | — | — | 6 | 16 | 16 | 7 |
Swell 3 Height (m) Direction Period (s) | S 19 | S 20 | S 18 | SE 17 | SE 17 | SE 16 | SE 15 | SE 15 | S 15 | S 15 | S 15 | S 14 | S 13 | — | S 10 | — | — | — | S 18 | S 19 | S 19 |
| kJ | 7 | 31 | 107 | 12 | 11 | 10 | 9 | 8 | 17 | 18 | 17 | 4 | 3 | — | 18 | — | — | — | 25 | 29 | 29 |
Wind waves Height (m) Direction Period (s) | ESE 6 | S 4 | — | — | — | — | — | — | NNE 3 | — | NE 3 | NNE 5 | WNW 3 | NE 3 | WSW 3 | SSW 6 | S 9 | S 9 | — | — | — |
| kJ | 108 | 3 | — | — | — | — | — | — | 4 | — | 3 | 28 | 1 | 2 | 3 | 186 | 1494 | 977 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 78 | 90 | 7 | 7 | 7 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 123 | 2 | 2 | 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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