Surf Forecasts:
Narrabeen-Alley Rights surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 5ft (1.6m), 6s period, NE swell with offshore winds.
- Most powerful swell: Thursday 27 Aug, 1AM (local time) - 4.5ft (1.3m), 7s period, SSE swell with 191 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 5ft (1.6m), 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 10PM. The primary swell is predicted to be 1.6m and 6s period with a secondary swell of 1.4m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Narrabeen-Alley Rights in the next 16 days are 1.3m 7s and forecast to arrive on Thursday (Aug 27) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Wednesday (Aug 26) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 5ft (1.6m) 6s |
| Best Surf | 10PM (Thu 20th Aug) | 5ft (1.6m) 6s |
| Most Powerful | 1AM (Thu 27th Aug) | 4.5ft (1.3m) 7s |
Table - best surf conditions forecast for Narrabeen-Alley Rights over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight with you – this Narrabeen-Alley Rights outlook is a tough one. We’ve got a solid 16-day window, but the first bit is pretty quiet. The earliest any decent surf shows is Friday morning, 21 August, and even then, it’s small and ordinary. You’ll need to be patient.
Friday morning, 21 August, brings small 3ft swell from the ENE, but the wind is offshore from the NW at 9 mph, which cleans things up nicely for those who know the bank. The combined energy is only 62 – weak stuff, but it’s rideable. Afternoon’s even smaller.
Then we hit a real dry spell. From Saturday 22 August right through to Sunday morning, 30 August, the surf is mostly poor or tiny. There are a few moments like Monday 24 August morning with 4ft ENE swell and light offshore winds, but the period is a short 6 seconds and the energy hits 107 (moderate). Still, the comments say “very ordinary conditions.” Not a day to call your mates.
The real stand out – the only one that gets the heart going – is Sunday morning, 30 August. Swell from the NE bumps up to 5ft at 8 seconds, pushing combined energy to 430 (strong). That’s the biggest energy in the whole period. But here’s the rub: the wind is cross-on from the SSW at 19 mph, lumpy and messy. For paddle surfing, it’s gonna be a battle. Honestly, at this size and with that wind, Narrabeen-Alley Rights looks more interesting for kite surfing than a solid paddle session. The swell direction is NE, not the optimum ENE, so shape won’t be perfect.
Monday 31 August and Tuesday 1 September offer a small reprieve – 3ft to 3ft ENE swell, and Tuesday morning is glassy with no wind and energy at 72. Clean, tiny, but maybe a fun longboard wave if you’re desperate.
After that, it fades again. Thursday morning, 3 September, has a 2ft swell from the E with a long period of 11 seconds (groundswell) and light offshore from the NNE – energy is only 57. Clean but barely a ripple.
The water temp is 63°F, about 1°F cooler than average – normal for this time of year, nothing wild.
Bottom line: the whole 16 days is a lean run. Friday morning the 21st is your best clean, small window; the 30th has the most energy but shocking wind. It’s a blank run for the area – nothing unusual here. Forecasts can always change, but for now, don’t hold your breath.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Fri morning, min 12°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Wed morning. Warm (max 22°C on Tue morning, min 13°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 | ENE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | ENE 9 | ENE 9 | ENE 5 | ENE 6 | ENE 7 | ENE 6 | NE 6 | NE 6 | ENE 7 | NE 8 | ENE 8 | SSE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 95 | 126 | 62 | 39 | 18 | 9 | 9 | 9 | 7 | 31 | 35 | 104 | 113 | 80 | 85 | 64 | 146 | 72 | 88 | 191 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | off | off | cross-off | cross-off | on | cross-off | cross | cross-on | cross-off | cross-off | cross | glassy | cross-off | off | cross-off | cross | cross-off | cross-off |
High Tide | 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 | 7:07AM1.08m | 7:04PM1.52m | ||||||||
Low Tide | 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 | 12:39PM0.37m | 1:43AM0.18m | |||||||
 |  |  | |  |  | |  | | | | | | | |  |  |  | | | |
 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:20 | — | — |
 | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | — | 5:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 8 | 8 | 4 | — |
Temp °C | 19 | 19 | 20 | 20 | 16 | 19 | 18 | 16 | 16 | 16 | 16 | 19 | 18 | 18 | 22 | 20 | 17 | 14 | 13 | 12 |
Feels °C | 16 | 17 | 17 | 16 | 13 | 16 | 15 | 14 | 14 | 13 | 14 | 16 | 15 | 15 | 18 | 16 | 14 | 11 | 7 | 6 |
Swell 1 Height (m) Direction Period (s) | SE 7 | ENE 6 | ENE 6 | NE 6 | NE 6 | SSW 5 | SSW 8 | NE 6 | S 10 | S 8 | S 10 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | NE 6 | ENE 7 | NE 8 | ENE 8 | SSE 7 |
| kJ | 18 | 126 | 62 | 39 | 18 | 5 | 22 | 9 | 161 | 82 | 200 | 104 | 113 | 80 | 62 | 64 | 146 | 72 | 88 | 191 |
Swell 2 Height (m) Direction Period (s) | E 10 | S 12 | S 11 | SE 7 | N 4 | NE 6 | SSW 5 | S 9 | NE 6 | S 14 | NE 8 | S 10 | S 10 | S 10 | S 9 | ENE 9 | S 16 | S 16 | S 15 | ENE 8 |
| kJ | 2 | 3 | 2 | 2 | 3 | 9 | 5 | 6 | 6 | 142 | 11 | 165 | 138 | 94 | 61 | 59 | 21 | 5 | 18 | 58 |
Swell 3 Height (m) Direction Period (s) | S 13 | — | — | S 11 | S 10 | S 9 | NE 6 | E 9 | ENE 9 | ENE 9 | E 14 | E 13 | E 13 | ENE 9 | ENE 9 | S 9 | — | — | — | S 14 |
| kJ | 4 | — | — | 2 | 2 | 6 | 9 | 2 | 7 | 31 | 4 | 3 | 3 | 17 | 32 | 58 | — | — | — | 4 |
Wind waves Height (m) Direction Period (s) | NE 6 | — | NW 2 | — | W 3 | — | — | SSW 3 | — | — | ENE 5 | — | — | — | NE 6 | — | S 5 | S 8 | S 9 | — |
| kJ | 95 | — | 1 | — | 3 | — | — | 5 | — | — | 35 | — | — | — | 85 | — | 115 | 1064 | 773 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 57 | 0 | 0 | 48 | 232 | 114 | 392 | 136 | 1 | 18 | 0 | 0 | 173 | 0 | 19 | 0 | 7 | 2 | 6 | 4 |
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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