Surf Forecasts:
Narrabeen-Alley Rights surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 5ft (1.6m), 6s period, NE swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 7AM (local time) - 6ft (1.8m), 6s period, NE swell with 259 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 1AM (local time) - 4ft (1.2m), 6s period with NE swell.
Best Forecast Surf Conditions for Narrabeen-Alley Rights this week:
The surf forecast for Narrabeen-Alley Rights over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 1AM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 0.7m and 9s. Another secondary swell of 0.1m and 12s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Narrabeen-Alley Rights in the next 16 days are 1.8m 6s and forecast to arrive on Tuesday (Aug 25) 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 1.2m 5s period and expected on Thursday (Aug 20) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 20th Aug) | 4ft (1.2m) 6s |
| Best Surf | 10PM (Thu 20th Aug) | 5ft (1.6m) 6s |
| Most Powerful | 7AM (Tue 25th Aug) | 6ft (1.8m) 6s |
Table - best surf conditions forecast for Narrabeen-Alley Rights over the next 16 days.
The Lowdown
G’day, I’m Rusty. Let’s talk about what’s on offer for Narrabeen-Alley Rights over the next couple of weeks.
Right off the bat, I gotta be straight with you – this stretch is looking pretty quiet for a good while. Most of the forecast window is filled with small, weak swells and cross-shore winds, so you’ll be waiting a fair bit before anything really gets going. The water temp is sitting at 63°F, which is about 1°F cooler than average for this time of year – nothing too wild, just a touch on the fresh side.
The first real standout pops up on Tuesday morning, August 25th. That’s your best bet right now. The swell comes from the NE at 5ft, with a short period of 7 seconds, and it’s glassy – zero wind, just clean as a whistle. The combined swell energy is moderate at 233, so there’s a bit of push behind it. This is a beach/sandbar setup, so that short period will keep the waves a bit softer, but the clean conditions make it worth a paddle. Keep in mind, this spot is very consistent and exposed, but crowds are often a factor here, so don’t expect to have it to yourself. It’s an advanced break, so if you’re newer, maybe give this one a miss – but if you’ve got the skills, Tuesday morning is the pick of the first week.
After that, things get messy again. Wednesday the 26th sees strong W winds at 28 mph grooming a 3ft NE swell, but it’s crossed up and the wind’s howling, so it’s not really surfable. We hit a long dry spell with barely a ripple until we get to the very end of the forecast.
Now, here’s where it gets interesting but a bit daunting. On Wednesday morning, September 2nd, a big SSE groundswell rolls in at 12ft with a 12-second period and a massive combined energy of 3792. That’s a lot of power. Wind is cross-onshore from the ENE at 12 mph, but the size is just too much for this break – it’s only for the bravest experts, and even then, it’ll be a wild one. The afternoon drops a bit to 10ft, still huge. If you’re a seasoned charger and you’ve got the equipment, that’s a day to watch, but honestly, it’s more of a spectacle than a session for most.
So, to sum it up: Tuesday morning, August 25th, is your clean, fun window. The rest of the first week is a write-off, and the second week brings a massive swell that’s too big for comfort. The breaks are fairly consistent here, so it won’t stay flat forever, but for now, pick your moment carefully.
Rusty
Short Range ForecastLight rain (total 4mm), mostly falling on Fri night. Warm (max 20°C on Thu morning, min 13°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Tue morning. Warm (max 21°C on Mon afternoon, min 13°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 10 | NE 6 | ESE 8 | NE 6 | ENE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | S 5 | SE 5 | E 5 | ENE 4 | ENE 5 | ENE 6 | ENE 7 | NE 5 | NE 7 | ENE 8 | NE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 210 | 86 | 56 | 72 | 121 | 51 | 30 | 18 | 9 | 19 | 28 | 16 | 19 | 24 | 25 | 53 | 53 | 200 | 198 | 211 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | off | off | off | off | cross | cross-on | glassy | cross-off | cross | cross-off | off | cross | glassy | glassy | glassy | cross-off |
High Tide | 1:09AM0.94m | 1:50PM1.27m | 2:20AM0.87m | 2:55PM1.26m | 3:43AM0.85m | 4:00PM1.28m | 4:55AM0.88m | 4:58PM1.34m | 5:48AM0.93m | 5:46PM1.40m | 6:30AM1.00m | 6:27PM1.47m | ||||||||
Low Tide | 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 | 11:07AM0.49m | 00:37AM0.31m | 11:56AM0.43m | 1:12AM0.24m | |||||||
 |  |  |  |  |  | |  | | | | | |  | | | |  | | | |
 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — |
 | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — |
mm | — | — | — | — | — | 1 | — | 3 | — | — | — | — | — | — | — | — | 3 | 6 | 5 | 6 |
Temp °C | 16 | 16 | 20 | 19 | 19 | 17 | 15 | 15 | 17 | 16 | 16 | 16 | 16 | 16 | 20 | 21 | 19 | 15 | 15 | 15 |
Feels °C | 12 | 12 | 16 | 15 | 17 | 14 | 10 | 11 | 15 | 14 | 15 | 14 | 11 | 13 | 18 | 20 | 17 | 16 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | SE 9 | ENE 6 | SE 7 | ENE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | NE 6 | SE 5 | E 5 | S 8 | ENE 5 | ENE 6 | S 10 | ENE 9 | NE 7 | ENE 8 | NE 8 |
| kJ | 210 | 81 | 40 | 23 | 121 | 51 | 30 | 18 | 9 | 9 | 28 | 16 | 50 | 24 | 25 | 30 | 31 | 200 | 198 | 211 |
Swell 2 Height (m) Direction Period (s) | S 8 | E 12 | ESE 8 | E 10 | S 12 | S 11 | SE 7 | S 10 | SSW 5 | S 9 | NE 6 | S 8 | S 17 | S 8 | S 10 | S 16 | S 9 | S 8 | S 8 | S 10 |
| kJ | 10 | 3 | 56 | 2 | 3 | 2 | 2 | 2 | 5 | 14 | 9 | 34 | 49 | 28 | 35 | 5 | 25 | 13 | 5 | 8 |
Swell 3 Height (m) Direction Period (s) | E 9 | — | E 11 | S 13 | — | S 11 | S 11 | SE 8 | S 9 | E 9 | S 9 | NE 6 | E 14 | NE 8 | NE 8 | E 13 | S 15 | S 14 | S 15 | S 14 |
| kJ | 6 | — | 2 | 4 | — | 2 | 2 | 2 | 6 | 2 | 14 | 9 | 4 | 18 | 15 | 3 | 17 | 16 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | NE 4 | NE 6 | NE 6 | NE 6 | — | — | NW 3 | WNW 2 | — | S 5 | SE 5 | — | ENE 4 | NNW 3 | — | ENE 7 | NE 5 | — | NW 3 | NW 3 |
| kJ | 17 | 86 | 50 | 72 | — | — | 1 | 1 | — | 19 | 28 | — | 19 | 2 | — | 53 | 53 | — | 6 | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 444 | 0 | 0 | 57 | 0 | 0 | 48 | 186 | 185 | 276 | 0 | 4 | 338 | 1 | 1 | 7 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Sydney North Coast | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Narrabeen-Alley Rights Surf forecast
The above surf forecast table for Narrabeen-Alley Rights provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Narrabeen-Alley Rights can be found by selecting the local surf guide option on the grey menu. Our Narrabeen-Alley Rights 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 (Narrabeen-Alley Rights) 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 Narrabeen-Alley Rights 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.
Narrabeen-Alley Rights is 5 km (3 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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