
Surf Forecasts:
Avalon-South surf forecast from 14 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 1AM (local time) - 5ft (1.6m), 6s period, NE swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 1AM (local time) - 5.5ft (1.7m), 9s period, SSE swell with 484 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 1AM (local time) - 5ft (1.6m), 6s 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 Tuesday (Sep 15) at 1AM. The primary swell is predicted to be 1.6m and 6s period with a secondary swell of 1.2m and 6s. 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 1.7m 9s and forecast to arrive on Friday (Sep 18) at 1AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 10s period and expected on Wednesday (Sep 16) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 15th Sep) | 5ft (1.6m) 6s |
| Best Surf | 1AM (Tue 15th Sep) | 5ft (1.6m) 6s |
| Most Powerful | 1AM (Fri 18th Sep) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
The Lowdown
Right then, let’s get into it. Avalon-South is the only spot on the radar, and honestly, it’s a tough stretch ahead. The water’s sitting around 63°, which is pretty much normal for the time of year, so no surprises there.
The first proper chance to get wet doesn’t show until Tuesday morning, September 15. We’re looking at a small 3 ft swell from the NE, with a short period of just 7 seconds, so it’ll be weak and a bit lacking in push. The combined energy is a weak 83. But the wind is light and off the SSW, making it cross-off and clean – glassy, really. This is the best on offer. It’s tiny, but if you’re a beginner looking for a longboard or a foamie, this is your window. Expect fairly consistent waves, and the NE swell direction lines up well with the break. Crowds can be a thing here, so get out early.
After that morning, it falls away. Tuesday afternoon turns choppy, and Wednesday and Thursday are total washouts with barely a ripple – 0.7 ft and less. You’re looking at a long gap of several days with nothing worthwhile.
We get a flicker of life again on Sunday morning, September 20. Another tiny pulse, 1 ft from the NE, period a shocking 5 seconds. Combined energy is a mere 6. But again, the wind is light and cross-off, so it’ll be clean. It’s flat by any standard, but if you’re desperate, it’s a paddle.
Then another dead run until Wednesday morning, September 23. That morning is glassy calm, with a weak 4 ft NE short-period swell (energy 53). It looks surfable but ordinary – maybe a 1 out of 10. The real kicker comes Wednesday afternoon: a sudden jump to 4 ft from the SSE, with a 12-second period and combined energy of 506. That’s moderate energy, and a proper groundswell. The problem? The wind is cross-on from the NNE, putting a bump on it. This is worth keeping an eye on, but don’t expect perfection.
The swell winds down from there. Thursday shows some moderate energy (196), but it’s cross-shore and choppy. Friday morning, September 25, brings glassy conditions again with a weak 2 ft NE swell (energy 81). It’s got that “surfable but ordinary” vibe. The biggest wave of the whole period hits Sunday afternoon, September 27 – 6 ft from the SSE, with a period of 6 seconds and combined energy of 288. It’s strong, but the short period means it’ll be a bit of a washing machine and messy. The wind is cross-off from the NW, so it’ll be clean, but 6 ft is getting too big for beginners and pushes it into intermediate territory. Monday the 28th has more solid energy (236 and 511), but it’s cross-shore and lumpy. Not the best.
All in all, there’s no standout, epic session here. The best bet is Tuesday morning, September 15 – it’s small, clean, and lined up right for the break. After that, you’re hunting for crumbs. Keep the expectations low and the wax soft.
Rusty
Short Range ForecastMostly dry. Warm (max 23°C on Mon morning, min 9°C on Wed night). Winds increasing (light winds from the NNW on Mon night, fresh winds from the S by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat morning, min 10°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 | NE 6 | NE 6 | NE 7 | NE 7 | NE 7 | ENE 14 | ENE 12 | NE 13 | NE 13 | E 13 | SSE 9 | E 12 | E 12 | NE 4 | S 9 | NE 3 | NE 5 | NE 5 | NE 5 | NE 5 |
Wave Graph | |||||||||||||||||||||
80 | 59 | 184 | 77 | 46 | 18 | 20 | 15 | 7 | 7 | 3 | 484 | 3 | 3 | 5 | 0 | 5 | 11 | 6 | 10 | 10 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-on | off | glassy | cross-on | off | off | on | off | cross-off | cross-off | cross-off |
High Tide | 10:15PM1.23m | 10:34AM1.44m | 10:56PM1.11m | 11:14AM1.39m | 11:41PM1.00m | 12:00PM1.32m | 00:37AM0.91m | 12:56PM1.26m | 1:51AM0.85m | 2:05PM1.23m | 3:17AM0.86m | 3:17PM1.24m | |||||||||
Low Tide | 4:16PM0.23m | 4:11AM0.28m | 5:03PM0.30m | 4:43AM0.37m | 5:53PM0.38m | 5:19AM0.45m | 6:52PM0.45m | 6:03AM0.53m | 8:04PM0.49m | 7:05AM0.59m | 9:22PM0.48m | 8:24AM0.61m | 10:27PM0.44m | ||||||||
5:56 | — | — | 5:54 | — | — | 5:52 | — | — | 5:52 | — | — | 5:50 | — | — | 5:48 | — | — | 5:48 | — | — | |
— | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 21 | 21 | 17 | 13 | 13 | 14 | 14 | 15 | 14 | 13 | 19 | 18 | 16 | 26 | 23 | 19 | 28 | 31 | 23 |
Feels °C | 20 | 18 | 18 | 19 | 15 | 6 | 5 | 6 | 6 | 11 | 11 | 12 | 16 | 14 | 15 | 22 | 18 | 17 | 25 | 27 | 18 |
Swell 1 Height (m) Direction Period (s) | NE 6 | S 11 | NE 6 | NE 7 | NE 7 | NE 7 | NE 7 | ENE 12 | NE 13 | NE 13 | S 10 | SSE 9 | SSE 9 | S 9 | S 9 | S 9 | S 9 | S 8 | NE 5 | NE 5 | NE 5 |
54 | 81 | 109 | 77 | 46 | 11 | 2 | 15 | 7 | 7 | 993 | 484 | 311 | 311 | 202 | 101 | 76 | 49 | 6 | 10 | 10 | |
Swell 2 Height (m) Direction Period (s) | S 11 | ENE 13 | S 10 | S 10 | S 9 | ENE 13 | ENE 14 | E 15 | — | S 20 | S 19 | NE 13 | S 18 | S 18 | S 16 | S 13 | S 16 | NE 5 | S 9 | S 8 | E 11 |
123 | 16 | 48 | 29 | 14 | 18 | 20 | 4 | — | 8 | 7 | 7 | 6 | 55 | 192 | 51 | 80 | 11 | 24 | 12 | 3 | |
Swell 3 Height (m) Direction Period (s) | ENE 13 | — | ENE 12 | NE 13 | ENE 13 | S 16 | — | — | — | — | E 13 | S 19 | E 12 | E 12 | NE 4 | S 17 | NE 12 | S 15 | S 12 | S 12 | — |
17 | — | 15 | 6 | 17 | 5 | — | — | — | — | 3 | 7 | 3 | 3 | 5 | 89 | 5 | 38 | 12 | 11 | — | |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | NE 6 | — | S 4 | S 8 | S 10 | S 10 | S 11 | S 10 | — | — | — | — | — | WNW 3 | NE 3 | NW 2 | NW 3 | — | SSW 4 |
80 | 59 | 184 | — | 8 | 1133 | 2095 | 2177 | 3447 | 1808 | — | — | — | — | — | 1 | 5 | 1 | 2 | — | 29 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 47 | 0 | 0 | 798 | 123 | 824 | 742 | 7 | 3 | 7 | 0 | 2 | 10 | 2 | 2 | 90 | 2 | 8 | 319 | 43 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










