Surf Forecasts:
Long Reef surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 7AM (local time) - 2.5ft (0.7m), 10s period, ESE swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 4.5ft (1.3m), 10s period, E swell with 307 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 4AM (local time) - 2ft (0.6m), 11s period with ESE swell.
Best Forecast Surf Conditions for Long Reef this week:
The surf forecast for Long Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 4AM. The primary swell is predicted to be 0.6m and 11s period with a secondary swell of 0.7m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Long Reef in the next 16 days are 1.3m 10s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 21) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 19th Aug) | 2ft (0.6m) 11s |
| Best Surf | 7AM (Wed 19th Aug) | 2.5ft (0.7m) 10s |
| Most Powerful | 4PM (Wed 19th Aug) | 4.5ft (1.3m) 10s |
Table - best surf conditions forecast for Long Reef over the next 16 days.
The Lowdown
Righto folks, Rusty here. Let's have a look at what's cookin' at Long Reef over this stretch.
To be straight with you, this is a lean fortnight. The first week is pretty much a write-off for any sort of decent session. We've got a lot of days with small, weak surf and poor conditions. There's a real gap from Wednesday the 19th through until around Friday the 28th where you'd be scratching for anything worthwhile. Most of that time it's poor surf with onshore or messy winds.
But hold on, because Friday the 28th of August morning actually shows a little spark. We get a 3ft southeast swell rolling in, and the wind goes offshore from the west at just 6 mph, keeping it clean. The combined energy is moderate at 207, and while the break is fairly consistent, it's an advanced reef setup, so it's not one for the grommets. This Friday morning is the standout window in the whole run, but don't get too excited – it's a small window.
After that, things get a bit wild. Saturday the 29th and Sunday the 30th see a big jump in swell size – we're talking 12ft from the southeast on Saturday – but the wind is howling onshore with a strong breeze up to 28 mph. That's messy, dangerous, and really only for the most experienced crew or more interesting for the kite surfers. The energy reads a massive 1999 on Saturday morning, which is strong, but you wouldn't want to paddle into that mess.
Later on, around Monday the 31st of August and into September, we get some long-period groundswell from the south (15-16 seconds), but the wind stays cross-onshore and the waves are small, around 2-3ft. That long period at a beach-and-reef setup like this tends to make things close out, so it's not a great bet.
Water temp is about average for this time of year, nothing to write home about.
Best bet: If you're keen and experienced, pencil in the Friday the 28th of August morning. For everything else, you're better off waiting for the next system.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 20°C on Thu afternoon, min 14°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 5mm), mostly falling on Fri night. Warm (max 23°C on Mon afternoon, min 14°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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 8 | ESE 10 | E 10 | SE 9 | ESE 6 | ESE 6 | ENE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | S 9 | S 8 | SSW 9 | S 8 | S 10 | S 10 | ENE 9 | ENE 9 |
Wave Graph | |||||||||||||||||||
104 | 80 | 307 | 81 | 47 | 27 | 87 | 62 | 39 | 17 | 9 | 14 | 12 | 26 | 50 | 71 | 64 | 58 | 50 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | cross | cross | cross | cross-off | cross-off | off | cross-off | off | on | glassy | glassy | cross-on | cross-off | cross-off | glassy | off |
High Tide | 00:16AM1.06m | 12:54PM1.30m | 1:11AM0.94m | 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 | |||||||
Low Tide | 6:14AM0.39m | 7:33PM0.49m | 6:56AM0.47m | 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 | |||||||
— | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | |
— | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | |
mm | 2 | — | — | — | — | — | — | — | — | 5 | — | — | — | — | — | — | — | — | 9 |
Temp °C | 16 | 17 | 16 | 16 | 19 | 20 | 20 | 20 | 16 | 16 | 18 | 16 | 16 | 16 | 16 | 16 | 22 | 23 | 19 |
Feels °C | 14 | 14 | 12 | 13 | 16 | 18 | 18 | 17 | 12 | 13 | 18 | 13 | 15 | 16 | 13 | 15 | 20 | 21 | 17 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | E 5 | S 8 | SE 9 | ESE 6 | ESE 6 | ENE 6 | ENE 6 | NE 6 | NE 6 | NE 6 | NE 6 | S 8 | S 5 | S 8 | NE 4 | S 10 | S 10 | ENE 9 |
104 | 27 | 10 | 81 | 47 | 27 | 87 | 62 | 39 | 17 | 9 | 9 | 12 | 7 | 50 | 10 | 64 | 52 | 50 | |
Swell 2 Height (m) Direction Period (s) | ESE 11 | ESE 10 | E 9 | E 12 | NE 5 | E 6 | S 12 | S 11 | SE 7 | S 6 | SSW 5 | S 9 | NE 6 | SSW 9 | NE 9 | S 10 | ENE 8 | S 16 | S 10 |
100 | 80 | 6 | 3 | 23 | 6 | 3 | 2 | 2 | 3 | 5 | 14 | 5 | 26 | 20 | 71 | 26 | 5 | 45 | |
Swell 3 Height (m) Direction Period (s) | S 10 | SE 7 | — | — | E 11 | E 10 | — | S 11 | S 11 | S 10 | S 9 | SSW 5 | S 4 | NE 6 | S 15 | NE 8 | NE 4 | E 13 | S 15 |
46 | 43 | — | — | 2 | 2 | — | 2 | 2 | 2 | 2 | 4 | 2 | 10 | 41 | 17 | 2 | 3 | 17 | |
Wind waves Height (m) Direction Period (s) | ENE 5 | ENE 5 | E 10 | NE 5 | NE 5 | NE 6 | — | — | — | WNW 3 | — | — | — | — | — | NNE 4 | — | ENE 9 | — |
26 | 46 | 307 | 68 | 31 | 25 | — | — | — | 1 | — | — | — | — | — | 14 | — | 58 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 395 | 0 | 0 | 0 | 0 | 0 | 3 | 264 | 382 | 342 | 172 | 3 | 320 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Long Reef Surf forecast
The above surf forecast table for Long Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Long Reef can be found by selecting the local surf guide option on the grey menu. Our Long Reef 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 (Long Reef) 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 Long Reef 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.
Long Reef is 2 km (1 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.











