
Surf Forecasts:
Avalon-South surf forecast from 11 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 4AM (local time) - 3.5ft (1.0m), 7s period, SE swell with glassy winds.
- Most powerful swell: Monday 17 Aug, 4AM (local time) - 6ft (1.9m), 7s period, ESE swell with 366 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 4AM (local time) - 3.5ft (1.0m), 7s period with SE 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 Wednesday (Aug 19) at 4AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.6m and 6s. 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 1.9m 7s and forecast to arrive on Monday (Aug 17) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Thursday (Aug 13) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 19th Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 4AM (Wed 19th Aug) | 3.5ft (1.0m) 7s |
| Most Powerful | 4AM (Mon 17th Aug) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s run through what’s happening at Avalon-South. Fair warning right up front—this forecast starts off real quiet. The first wave worth talking about doesn’t show up until Wednesday the 19th, and even then it’s nothing to call home about. That’s about a week of pretty much nothing.
The first few days? Forget ‘em. Wednesday the 12th morning has a tiny 2ft ENE swell with a 10-second period and weak energy (52), but it’s flagged as poor surf with a score of zero. Water temp’s about 64°, bang on average for this time of year, but there’s no surf to enjoy. Offshore wind keeps it clean but the swell’s just not there. Thursday and Friday stay small and get choppy with cross-onshore breezes.
Sunday the 16th sees a bump to 6ft out of the SSE, but the period is a lousy 6 seconds and the energy hits moderate (251). That short-period wind swell is messy, and it’s still rated poor. Not worth suiting up.
The first time you might actually want to paddle out is Wednesday the 19th morning. It’s glassy—dead calm, SW wind at 5 km/h—and there’s a 4ft ESE swell with a 7-second period and moderate energy (152). The report calls it “surfable waves but very ordinary conditions.” That’s the best so far, but it’s no blower. Thursday the 20th morning is glassy again with a similar 4ft ENE swell, also just ‘ordinary’.
Now, the real highlight: Sunday the 23rd. We’ve got a steady 4ft ENE swell with a nice 10-second period, clean offshore wind from the west at just 10 km/h, and wave energy building to strong (333 in the afternoon). The report says “expect good surf conditions” and gives it a score of 2—the highest in the whole run. Avalon-South is a beginner-friendly spot, fairly consistent and fairly exposed to this ENE direction, so those offshore mornings will be clean and rideable. Crowds can be a thing here—this break is ‘often’ busy, so get there early if you can.
Monday the 24th gets blown out by strong SSW winds at 25 km/h, and the energy drops. After that, the surf tails off. One to watch toward the end: Thursday the 27th afternoon has a solid 6ft NE swell, period jumping to 8 seconds, and energy surging to very strong (761), with clean offshore WNW winds at 20 km/h. The report gives it a high score of 3— “expect very good surf conditions.” That’s a long way out, so consider it promising but not locked in. If it hits, that afternoon could be the best session of the lot.
So here’s the deal: it’s a slow start with the first decent wave around the 19th, but the standout is Sunday the 23rd morning. Keep an eye on that Thursday the 27th afternoon for a possible ripper. Until then, don’t hold your breath.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Very mild (max 19°C on Wed afternoon, min 10°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Sat morning. Very mild (max 17°C on Mon morning, min 13°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 10 | ENE 10 | ENE 9 | ENE 10 | ENE 9 | ENE 9 | ENE 10 | ENE 9 | SSE 7 | ENE 9 | ENE 10 | ENE 10 | SSE 6 | SE 6 | SE 7 | E 7 | E 7 | E 7 | E 7 | E 7 | SE 7 |
Wave Graph | |||||||||||||||||||||
52 | 52 | 49 | 54 | 35 | 29 | 31 | 29 | 136 | 29 | 18 | 18 | 232 | 153 | 271 | 134 | 218 | 266 | 157 | 74 | 65 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | cross-on | cross-off | off | cross-on | cross | cross | cross | cross | cross | cross-on | on | on | on | on | on | on | on |
High Tide | 7:50PM1.78m | 8:34AM1.25m | 8:36PM1.75m | 9:17AM1.31m | 9:20PM1.66m | 9:59AM1.34m | 10:02PM1.53m | 10:40AM1.36m | 10:44PM1.37m | 11:22AM1.36m | 11:27PM1.21m | 12:05PM1.34m | 00:13AM1.06m | ||||||||
Low Tide | 1:22PM0.22m | 2:33AM-0.04m | 2:13PM0.19m | 3:13AM-0.02m | 3:02PM0.19m | 3:51AM0.02m | 3:50PM0.23m | 4:27AM0.10m | 4:40PM0.28m | 5:01AM0.19m | 5:31PM0.36m | 5:35AM0.29m | 6:27PM0.43m | ||||||||
6:37 | — | — | 6:35 | — | — | 6:35 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | |
— | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | |
mm | — | — | — | — | — | — | — | — | 4 | 5 | 1 | 6 | — | 1 | 2 | 1 | 1 | 6 | — | 1 | 5 |
Temp °C | 17 | 19 | 13 | 17 | 16 | 14 | 16 | 15 | 15 | 15 | 16 | 15 | 16 | 16 | 15 | 17 | 16 | 15 | 16 | 16 | 15 |
Feels °C | 13 | 15 | 9 | 14 | 12 | 11 | 13 | 11 | 13 | 11 | 11 | 10 | 11 | 12 | 11 | 12 | 12 | 11 | 13 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 9 | S 8 | ENE 10 | S 8 | S 8 | S 9 | S 8 | SSE 7 | ENE 9 | ENE 10 | S 7 | S 16 | S 8 | S 11 | SE 7 | S 9 | S 8 | E 7 | E 7 | SE 7 |
273 | 157 | 108 | 54 | 320 | 202 | 192 | 196 | 136 | 29 | 18 | 157 | 80 | 42 | 82 | 130 | 57 | 35 | 157 | 74 | 65 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 10 | ENE 9 | S 16 | ENE 9 | ENE 9 | ENE 10 | ENE 9 | ENE 9 | S 19 | S 18 | ENE 10 | ENE 10 | S 12 | ENE 10 | S 10 | S 14 | SSW 12 | S 9 | SE 7 | ENE 6 |
52 | 52 | 49 | 5 | 35 | 29 | 31 | 29 | 29 | 29 | 59 | 18 | 19 | 45 | 20 | 89 | 16 | 26 | 40 | 52 | 41 | |
Swell 3 Height (m) Direction Period (s) | S 15 | S 15 | S 13 | S 12 | S 19 | S 15 | S 18 | S 15 | S 16 | SE 8 | — | S 17 | S 13 | ENE 10 | S 17 | S 16 | SSW 12 | — | ENE 8 | S 9 | S 9 |
4 | 4 | 3 | 3 | 7 | 17 | 27 | 18 | 19 | 3 | — | 49 | 3 | 20 | 22 | 20 | 14 | — | 14 | 25 | 27 | |
Wind waves Height (m) Direction Period (s) | WNW 3 | NW 3 | W 4 | S 7 | — | W 3 | — | — | — | S 8 | S 8 | — | SSE 6 | SE 6 | SE 7 | E 7 | E 7 | E 7 | — | — | — |
4 | 2 | 9 | 134 | — | 2 | — | — | — | 295 | 323 | — | 232 | 153 | 271 | 134 | 218 | 266 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 10 | 2 | 2 | 10 | 3 | 45 | 45 | 3 | 203 | 0 | 193 | 242 | 385 | 182 | 90 | 45 | 11 |
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.











