
Surf Forecasts:
Narrabeen-Alley Rights surf forecast from 15 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 7PM (local time) - 6ft (1.8m), 9s period, SSE swell with 552 kJ wave energy.
Best Forecast Surf Conditions for Narrabeen-Alley Rights this week:
The most powerful waves expected at Narrabeen-Alley Rights in the next 16 days are 1.8m 9s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.5m 9s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7PM (Thu 17th Sep) | 6ft (1.8m) 9s |
Table - best surf conditions forecast for Narrabeen-Alley Rights over the next 16 days.
The Lowdown
G’day, Rusty here, and I’m looking straight at the surf outlook for the next couple of weeks. Straight up, it’s a grim stretch at Narrabeen-Alley Rights – a beach/sandbar setup that’s exposed to the swell, but the charts are showing a whole lot of nothing for a long, long time.
The first real pulse of any kind doesn’t show until Tuesday, September 23rd. Before that, we’re looking at days of tiny, weak slop. From the 15th right through to the morning of the 23rd, it’s mostly flat or messy – swell heights barely kissing 2 ft to 3 ft at best, and often dropping to 0.3 ft or even flat with zero energy (combined energy of all swells directed here mostly under 100, often just 3–8). Winds are all over the shop too, mostly cross or onshore, so you’re looking at choppy, bumpy water. That’s a solid 8-day stretch of poor surf. You’d be mad to paddle out.
Finally, on the morning of Tuesday the 23rd, we get a lift: a 4 ft swell from the NE, period 5 seconds, with a clean cross-offshore breeze (NNE at 16 mph). The energy climbs a bit (combined energy of all swells directed here is 69). It’s not a world-beater, but it’s the first thing that’s not completely awful. Afternoon that same day ramps up to 6 ft from the NE, period 6 seconds, but wind swings to a fresh NE cross-shore at 22 mph, and the energy jumps to 227 – moderate. That’s punchy but lumpy; it’ll be a bit of a mess for a paddle board.
The standout window – and I mean the only real highlight – arrives on Monday, September 28th. Morning shows a 4 ft swell from the SE, period 7 seconds, with a gentle offshore wind from the NNW at 9 mph. Combined energy is 242 (moderate). The forecast says “expect good surf conditions” – and I’m buzzing for it. That offshore flow will clean it right up, and the SE swell should wrap in nicely for a beach/sandbar that likes ENE swell. It’s not huge, but it’s clean and rideable. The afternoon holds up too, with 3 ft from the ENE, period 9 seconds, and a moderate offshore from the NW at 12 mph – energy at 246. That’s a solid day if you can get out there. Crowds are listed as “often” for this spot, so expect some company, but on a clean day like that, it’s worth jostling for a wave.
A quick heads-up: water temp is around average for this time of year, nothing wild going on there.
The rest of the forecast into the 29th and 30th fades back into poor, choppy conditions with cross-onshore winds. So if you’re hanging for a wave, your best bet is that Monday the 28th. The earlier stuff is mostly a write-off. Don’t hold your breath for much else.
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Mon night, min 9°C on Wed night). Winds increasing (light winds from the NW on Mon night, strong winds from the S by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Sun afternoon, min 10°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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 7 | NE 6 | ENE 13 | ENE 14 | ENE 12 | NE 13 | E 13 | E 13 | NE 13 | E 12 | E 12 | NE 4 | NE 4 | ENE 3 | NE 4 | NNE 4 | NE 4 | NE 4 |
Wave Graph | |||||||||||||||||||
186 | 63 | 33 | 18 | 20 | 15 | 7 | 3 | 3 | 7 | 3 | 3 | 8 | 3 | 3 | 2 | 1 | 8 | 3 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | on | cross-on | cross-on | cross-on | cross-on | cross | on | off | glassy | cross | cross-off | cross-off | cross-on | off | cross-off | cross-off | off |
High Tide | 10:15PM1.23m | 10:35AM1.44m | 10:56PM1.11m | 11:14AM1.39m | 11:41PM1.00m | 12:00PM1.32m | 00:37AM0.91m | 12:56PM1.26m | 1:51AM0.85m | 2:05PM1.23m | 3:18AM0.86m | 3:17PM1.24m | |||||||
Low Tide | 4:11AM0.28m | 5:03PM0.30m | 4:43AM0.37m | 5:53PM0.38m | 5:19AM0.45m | 6:52PM0.45m | 6:04AM0.53m | 8:05PM0.49m | 7:05AM0.59m | 9:22PM0.48m | 8:25AM0.61m | 10:27PM0.44m | |||||||
— | 5:54 | — | — | 5:54 | — | — | 5:52 | — | — | 5:50 | — | — | 5:48 | — | — | 5:48 | — | — | |
— | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 17 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 20 | 18 | 17 | 24 | 22 | 22 | 26 | 27 | 25 |
Feels °C | 18 | 19 | 14 | 6 | 4 | 5 | 6 | 10 | 10 | 12 | 17 | 14 | 16 | 19 | 17 | 18 | 22 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 7 | NE 6 | NE 6 | ENE 14 | ENE 12 | NE 13 | S 10 | S 9 | S 9 | S 9 | S 10 | S 9 | S 10 | S 9 | S 9 | S 8 | S 8 | S 10 |
136 | 63 | 33 | 6 | 20 | 15 | 7 | 1290 | 679 | 402 | 380 | 301 | 210 | 149 | 111 | 78 | 35 | 22 | 17 | |
Swell 2 Height (m) Direction Period (s) | S 10 | S 10 | S 9 | ENE 13 | ENE 14 | — | — | S 19 | S 19 | NE 13 | S 18 | S 18 | S 16 | S 18 | S 15 | NE 4 | NNE 4 | S 11 | NE 4 |
48 | 29 | 25 | 18 | 20 | — | — | 28 | 28 | 7 | 102 | 150 | 125 | 55 | 41 | 2 | 1 | 2 | 3 | |
Swell 3 Height (m) Direction Period (s) | ENE 12 | NE 13 | ENE 13 | S 16 | S 17 | — | — | E 13 | E 13 | S 19 | E 12 | E 12 | NE 4 | NE 4 | S 18 | S 15 | S 17 | S 17 | S 19 |
15 | 6 | 17 | 5 | 22 | — | — | 3 | 3 | 7 | 3 | 3 | 8 | 3 | 56 | 19 | 6 | 6 | 27 | |
Wind waves Height (m) Direction Period (s) | NE 6 | SW 3 | SSE 4 | S 9 | S 10 | S 10 | S 10 | S 10 | — | — | — | ENE 2 | — | WSW 3 | ENE 3 | — | — | NE 4 | SW 3 |
186 | 2 | 10 | 1261 | 2177 | 2491 | 2518 | 1584 | — | — | — | 1 | — | 2 | 3 | — | — | 8 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 1 | 1325 | 115 | 833 | 734 | 115 | 2 | 38 | 1 | 1 | 18 | 1 | 1 | 18 | 1 | 1 | 70 | 1 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










