Surf Forecasts:
Narrabeen-South surf forecast from 20 Aug 2026:
- Best quality surf: Friday 21 Aug, 4AM (local time) - 3.5ft (1.1m), 6s period, ENE swell with cross-offshore winds.
- Most powerful swell: Thursday 20 Aug, 10PM (local time) - 5ft (1.6m), 6s period, NE swell with 200 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 4AM (local time) - 3.5ft (1.1m), 6s period with ENE swell.
Best Forecast Surf Conditions for Narrabeen-South this week:
The surf forecast for Narrabeen-South over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 4AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.1m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Narrabeen-South in the next 16 days are 1.6m 6s and forecast to arrive on Thursday (Aug 20) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Wednesday (Aug 26) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 21st Aug) | 3.5ft (1.1m) 6s |
| Best Surf | 4AM (Fri 21st Aug) | 3.5ft (1.1m) 6s |
| Most Powerful | 10PM (Thu 20th Aug) | 5ft (1.6m) 6s |
Table - best surf conditions forecast for Narrabeen-South over the next 16 days.
The Lowdown
G’day, Rusty here. Look, it's a tough start. There's nearly a week of "poor surf conditions" on the cards, with nothing worth paddling out for from Thursday the 20th right through to Saturday morning the 22nd. The swell is small and the wind's all over the shop. It's a real flat spell to kick things off.
From Sunday morning the 23rd we start to see a bit of life. There's a pulse of south swell coming in at 3ft from the S, with a moderate 174 combined energy. It's surfable, but very ordinary. The WSW offshore wind at 3 mph has things clean, so you could snag a few grovellers if you're keen. Monday morning the 24th is touch and go with a 3ft S swell and a bit more energy (217), but the NNW cross-breeze will leave it bumpy. Tuesday the 25th has a moment of glassy conditions on the morning with an SSW breeze at 3 mph, but the wave size is only 2ft and the energy’s weak at 124.
Honestly, the first week is a write-off. But hang tight, because the second week looks a whole lot more promising.
The standout window is Wednesday the 2nd of September, morning session at Narrabeen-South. We’re looking at a clean 5ft swell from the ENE, combined energy of 549 (moderate), with a period of 11 seconds—nice, long-period groundswell that will wrap in and offer some proper shape. The wind is light offshore from the W at 6 mph, and it's going to be glassy clean. This is the best of the entire run. It's not huge, but for an exposed beachie like Narrabeen, that ENE direction with that period and clean conditions is a beauty. Crowds are possible, so get in early.
Tuesday morning the 1st of September is also worth a mention, with 4ft from the ENE, clean offshore wind from the W at 9 mph, and 296 combined energy. It’s a solid prelude to the main event on Wednesday.
So don’t bin your board just yet. The first nine days are dud, but the payoff on Wednesday the 2nd is worth waiting for. The long-range stuff for the 3rd and 4th looks promising too, but less certain, so keep an eye on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Thu morning, min 12°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 31mm), heaviest during Tue night. Warm (max 20°C on Mon morning, min 13°C on Sun night). Winds increasing (calm on Mon night, strong winds from the S by Tue night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 | ENE 6 | ENE 6 | NE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | S 10 | S 14 | S 10 | S 10 | S 10 | S 10 | S 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 60 | 75 | 126 | 51 | 38 | 14 | 9 | 12 | 9 | 154 | 138 | 198 | 125 | 138 | 94 | 61 | 103 | 99 | 82 | 82 | 78 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross | cross | cross-off | cross-off | cross | off | off | on | cross-on | cross | on | glassy | glassy | cross | off | off | cross-off | cross-off |
High Tide | 1:50PM1.27m | 2:23AM0.87m | 2:55PM1.26m | 3:45AM0.85m | 4:00PM1.28m | 4:56AM0.88m | 4:57PM1.33m | 5:48AM0.93m | 5:45PM1.40m | 6:30AM1.00m | 6:27PM1.46m | 7:07AM1.07m | 7:04PM1.52m | ||||||||
Low Tide | 8:49PM0.51m | 7:52AM0.53m | 10:06PM0.50m | 9:00AM0.56m | 11:09PM0.45m | 10:09AM0.54m | 11:58PM0.38m | 11:07AM0.50m | 00:37AM0.31m | 11:55AM0.44m | 1:12AM0.24m | 12:38PM0.38m | 1:44AM0.18m | ||||||||
 |  |  | | | |  | |  | | | | | | |  | |  | | | | |
 | 6:28 | — | — | 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 | 5 | 25 | 4 | — | — |
Temp °C | 20 | 20 | 19 | 20 | 20 | 16 | 19 | 18 | 16 | 16 | 16 | 16 | 20 | 18 | 18 | 15 | 19 | 14 | 14 | 15 | 15 |
Feels °C | 16 | 17 | 16 | 18 | 16 | 13 | 17 | 15 | 15 | 14 | 13 | 14 | 17 | 15 | 16 | 14 | 17 | 7 | 8 | 8 | 9 |
Swell 1 Height (m) Direction Period (s) | ENE 6 | SE 7 | ENE 6 | ENE 6 | NE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | S 10 | S 8 | S 10 | ENE 6 | S 10 | ENE 6 | ENE 6 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 40 | 23 | 126 | 51 | 38 | 14 | 9 | 9 | 9 | 154 | 127 | 198 | 68 | 138 | 55 | 31 | 103 | 99 | 82 | 82 | 78 |
Swell 2 Height (m) Direction Period (s) | ESE 6 | E 10 | S 12 | S 11 | SE 7 | S 10 | SSW 6 | SSW 5 | S 8 | SSE 4 | S 14 | ENE 9 | S 10 | S 16 | S 10 | S 9 | S 9 | S 16 | S 10 | S 9 | S 6 |
| kJ | 37 | 2 | 3 | 2 | 2 | 2 | 6 | 5 | 1 | 10 | 138 | 7 | 125 | 21 | 94 | 61 | 57 | 20 | 17 | 7 | 33 |
Swell 3 Height (m) Direction Period (s) | E 11 | — | — | — | S 11 | SE 8 | S 9 | S 8 | S 12 | NE 6 | E 14 | E 14 | S 16 | E 13 | ENE 9 | ENE 9 | S 16 | — | S 16 | S 15 | SE 6 |
| kJ | 2 | — | — | — | 2 | 2 | 2 | 12 | 3 | 10 | 4 | 4 | 21 | 3 | 8 | 32 | 20 | — | 20 | 18 | 28 |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | — | NW 2 | WNW 3 | NW 3 | — | — | SSW 5 | — | ENE 9 | NE 5 | NW 4 | ENE 6 | WSW 2 | — | S 3 | S 4 | SSE 5 | SSE 6 | — |
| kJ | 60 | 75 | — | 1 | 2 | 5 | — | — | 7 | — | 30 | 57 | 3 | 82 | 1 | — | 1 | 40 | 46 | 53 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 56 | 1 | 1 | 46 | 232 | 263 | 393 | 57 | 0 | 20 | 1 | 1 | 125 | 0 | 0 | 1 | 171 | 206 | 215 | 4 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Narrabeen-South Surf forecast
The above surf forecast table for Narrabeen-South provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Narrabeen-South can be found by selecting the local surf guide option on the grey menu. Our Narrabeen-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 (Narrabeen-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 Narrabeen-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.
Narrabeen-South is 3 km (2 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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