
Surf Forecasts:
Avalon-South surf forecast from 9 Jul 2026:
- Best quality surf: Thursday 16 Jul, 7AM (local time) - 11ft (3.5m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Friday 17 Jul, 4AM (local time) - 20ft (6.0m), 12s period, SSE swell with 9,965 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 1AM (local time) - 5.5ft (1.7m), 9s 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 Friday (Jul 10) at 1AM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.6m and 14s. 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 6.0m 12s and forecast to arrive on Friday (Jul 17) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 9s period and expected on Wednesday (Jul 15) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 10th Jul) | 5.5ft (1.7m) 9s |
| Best Surf | 7AM (Thu 16th Jul) | 11ft (3.5m) 8s |
| Most Powerful | 4AM (Fri 17th Jul) | 20ft (6.0m) 12s |
Table - best surf conditions forecast for Avalon-South over the next 16 days.
G’day, I’m Rusty. Let’s have a look at what’s coming our way for Avalon-South over the next couple of weeks.
The first part of the period is pretty quiet. There’s a bit of swell showing from Thursday the 9th of July, with a 6ft SE swell at 10 seconds, but the wind is a cross-on SSE breeze at 18 mph, and the water is sitting at about 66°, which is average for this time of year. The energy is moderate (685), but honestly, conditions are marginal and choppy. Not worth paddling out for.
Things improve on Friday morning the 10th. The swell drops slightly to 6ft from the SE, but the wind swings to a light WSW offshore at 3 mph, and it’s clean. That’s the standout for the first few days – small but clean, and the energy is still moderate (566). Friday afternoon goes glassy with a 5ft SE swell (530), so that’s another good window if you can sneak out.
Saturday the 11th morning sees the swell drop to 3ft from the ESE, with a longer period of 12 seconds, and a light NNW cross-off breeze – clean and pretty. The energy is still moderate (407). But by Saturday afternoon, the wind swings cross-on and it gets choppy. Sunday the 12th and Monday the 13th are tiny, with swell dropping to 0.7ft and energy down to barely anything (7). Not much doing.
Then from Tuesday the 14th through to Wednesday the 15th, it’s flat or near-flat. A gap of about three days with no real surf to speak of.
Now, here’s where it gets interesting but also a bit wild. From Thursday the 16th of July, a big pulse of SSE swell hits. Thursday morning sees 15ft at 10 seconds, with a cross wind and very strong energy (4233). The problem is, this break is for beginners, and anything over 5ft starts to get too much. By Thursday afternoon it’s 16ft, and Friday the 17th hits 18ft – the energy is enormous (up to 6555). The wind stays light to moderate, and the conditions are clean, but this is way too big for Avalon-South. The forecast even says it’s too big for this break. This is really only for the experts, and even then, it’s a beast. Saturday the 18th and Sunday the 19th keep pumping 20ft swells (energy over 10,000), with glassy conditions on Saturday morning – absolute monster surf, but not for the average surfer here.
The real highlight for experienced surfers comes on Monday the 20th of July. The swell drops to a more manageable 10ft from the SE, with a period of 11 seconds and a clean cross-off NW breeze. The energy is strong (2363), but the wind is favourable, and the conditions are clean. Monday afternoon goes glassy with an 8ft SE swell (1700) – that’s the sweet spot. It’s still big, but it’s clean and well-shaped. This is the standout session for the whole outlook.
After that, Tuesday the 21st morning has a 6ft SE swell with a moderate offshore wind (751) – good for a paddle, but not as good as Monday. The rest of the second week drops off quickly, with smaller swell and cross-shore winds taking over. By Thursday the 23rd and Friday the 24th, there’s a bit of a 6ft to 6ft SE swell (439 to 518), but the wind is cross-off or cross-shore, so it’s only marginal.
So, to wrap it up: the first few days are small but clean on Friday and Saturday morning. The middle of the period is flat. Then a massive pulse of swell hits from the 16th, but it’s too big for this beginner-friendly break. The best on offer is Monday the 20th of July, when the swell drops to 8ft to 10ft, the wind goes glassy or clean offshore, and the energy is still strong. That’s your window.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu night. Very mild (max 18°C on Sat afternoon, min 11°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed morning. Very mild (max 18°C on Tue morning, min 9°C on Sun night). Winds increasing (calm on Mon afternoon, fresh winds from the SSW by Wed morning). | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SE 9 | SE 10 | SE 10 | SE 10 | ESE 12 | ESE 11 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 8 | SSW 11 | SSW 8 | S 10 | S 6 | E 10 | S 8 | S 9 | SSE 8 | SSE 9 | SSE 10 |
Wave Graph | |||||||||||||||||||||
481 | 566 | 530 | 365 | 213 | 217 | 180 | 86 | 50 | 17 | 7 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 1282 | 2091 | 4069 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | cross-off | cross-off | cross-on | cross-off | off | off | cross-off | cross-off | glassy | cross-off | off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross |
High Tide | 3:42AM1.05m | 4:25PM1.52m | 4:58AM1.04m | 5:23PM1.62m | 6:07AM1.06m | 6:19PM1.72m | 7:08AM1.09m | 7:13PM1.80m | 8:04AM1.13m | 8:04PM1.84m | 8:56AM1.16m | 8:54PM1.83m | 9:45AM1.19m | ||||||||
Low Tide | 10:01PM0.39m | 9:38AM0.29m | 11:12PM0.28m | 10:38AM0.30m | 00:15AM0.16m | 11:38AM0.28m | 1:13AM0.05m | 12:36PM0.26m | 2:06AM-0.02m | 1:30PM0.24m | 2:56AM-0.06m | 2:23PM0.23m | 3:43AM-0.06m | 3:16PM0.24m | |||||||
— | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | |
— | — | 5:00 | — | — | 5:00 | — | — | 5:01 | — | — | 5:01 | — | — | 5:02 | — | — | 5:02 | — | — | 5:04 | |
mm | 4 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — |
Temp °C | 14 | 14 | 14 | 13 | 17 | 18 | 14 | 15 | 15 | 11 | 16 | 17 | 13 | 18 | 17 | 12 | 12 | 14 | 14 | 14 | 15 |
Feels °C | 13 | 13 | 14 | 12 | 15 | 15 | 11 | 9 | 9 | 6 | 13 | 15 | 9 | 14 | 12 | 6 | 5 | 8 | 10 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 10 | SE 10 | SE 10 | SE 9 | SE 8 | ESE 10 | ESE 10 | ESE 9 | SSW 6 | S 6 | SSW 11 | SSW 8 | S 7 | S 6 | S 10 | — | S 17 | S 16 | — | — |
481 | 566 | 530 | 365 | 194 | 135 | 180 | 86 | 50 | 31 | 21 | 24 | 23 | 4 | 3 | 53 | — | 6 | 5 | — | — | |
Swell 2 Height (m) Direction Period (s) | SE 14 | S 19 | S 21 | ESE 15 | ESE 12 | ESE 11 | SSE 8 | SE 8 | SE 8 | ESE 9 | SSW 11 | SSW 6 | S 11 | S 10 | S 8 | E 10 | — | — | — | — | — |
114 | 7 | 9 | 42 | 213 | 217 | 46 | 17 | 10 | 17 | 25 | 7 | 2 | 7 | 1 | 2 | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | S 16 | — | S 14 | S 16 | S 15 | S 16 | S 15 | N 4 | S 12 | SE 8 | ESE 8 | S 8 | — | S 16 | — | — | — | — | — | — | — |
5 | — | 4 | 5 | 4 | 5 | 4 | 1 | 3 | 2 | 7 | 5 | — | 5 | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 3 | NNW 4 | WSW 4 | SW 6 | WNW 3 | NW 3 | NW 3 | W 3 | WNW 3 | — | SSW 5 | S 8 | S 9 | SSE 8 | SSE 9 | SSE 10 |
— | — | — | — | — | 2 | 11 | 35 | 54 | 3 | 2 | 1 | 5 | 7 | — | 40 | 1208 | 2174 | 1282 | 2091 | 4069 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 2 | 2 | 2 | 43 | 127 | 268 | 214 | 7 | 170 | 170 | 7 | 3 | 7 |
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.











