Surf Forecasts:
Long Reef surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 23 Aug, 1AM (local time) - 10ft (3.0m), 8s period, S swell with offshore winds.
- Most powerful swell: Sunday 23 Aug, 4AM (local time) - 11ft (3.5m), 9s period, S swell with 1,730 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 7AM (local time) - 2.5ft (0.8m), 10s period with S 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 Monday (Aug 17) at 7AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 1.0m and 7s. 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 3.5m 9s and forecast to arrive on Sunday (Aug 23) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 5s period and expected on Saturday (Aug 22) at 7PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 17th Aug) | 2.5ft (0.8m) 10s |
| Best Surf | 1AM (Sun 23rd Aug) | 10ft (3.0m) 8s |
| Most Powerful | 4AM (Sun 23rd Aug) | 11ft (3.5m) 9s |
Table - best surf conditions forecast for Long Reef over the next 16 days.
The Lowdown
Alright, Rusty here, looking at the next couple of weeks. Let's be real, it's a slow start. We're looking at a pretty grim run of tiny, weak, and onshore slop to kick things off. The waiting game is on, but there's a light at the end of the tunnel that's worth getting excited about.
First up, Long Reef (reef) is dealing with a bit of a dud spell. The water temp is sitting about average for this time of year, so no surprises there. The next few days are a write-off: Sunday the 16th sees a 6 ft SSE swell, but it's a short-period 6-second windswell with a cross-on wind, making it a choppy, poor mess.
Monday and Tuesday stay small and weak, with hardly any energy in the water. Wednesday the 19th morning offers a brief glimmer – a glassy 4 ft wave from the ESE with a 6-second period, but the energy is weak. It's surfable but not worth writing home about. After that, it's back to tiny, onshore dribble through the end of the week.
Now, here's the standout. Circle Sunday the 23rd of August on your calendar. The forecast is for a solid 10 ft S groundswell with a period of 9 seconds. The combined energy cranks up to a massive 2743, which is strong. The morning looks clean with a light offshore breeze. This is a big swell, so it's strictly for the advanced crew – it's going to be powerful and take a steep drop. The only catch is the afternoon, where a strong onshore wind will chop it up, so you'll want to be on it first thing.
After that, the week of the 24th keeps a bit of momentum. Monday the 24th and Tuesday the 25th both have clean, surfable conditions with 5 ft to 6 ft S swells. The wind is offshore or cross-offshore, keeping the waves clean. Wednesday the 26th pushes a 6 ft S groundswell with a solid 12-second period, but the wind is a fresh 30 km/h offshore, which is a bit much. It'll be clean but blown-out in the face.
The following weekend (August 29th) brings another interesting one. A 5 ft NE swell shows up, and with a gentle offshore wind, conditions look good. The energy is moderate, and it's a shorter period, so it'll be a bit more playful.
The rest of the month into the start of September looks like it fades back into weak, small surf with average conditions. A few days here and there might have a clean look, but the energy is low.
Best bet? Sunday the 23rd of August at Long Reef. Get on it early before the wind turns. It's the big, powerful, clean session you've been waiting for.
Rusty
Short Range ForecastModerate rain (total 16mm), heaviest on Sat night. Very mild (max 16°C on Sun morning, min 13°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Very mild (max 18°C on Thu morning, min 12°C on Wed night). Winds increasing (calm on Wed morning, fresh winds from the NNW by Fri afternoon). | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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) | S 7 | SSE 6 | SSE 7 | S 11 | S 10 | ESE 7 | ESE 7 | ESE 6 | ESE 7 | ESE 6 | ESE 6 | ESE 10 | ESE 9 | ESE 7 | ESE 6 | NE 6 | ENE 7 | ENE 6 | ENE 7 |
Wave Graph | |||||||||||||||||||
150 | 222 | 192 | 182 | 113 | 88 | 68 | 82 | 83 | 104 | 100 | 81 | 140 | 58 | 53 | 154 | 102 | 85 | 70 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | glassy | cross-on | cross-off | cross | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:03PM1.52m | 10:41AM1.35m | 10:45PM1.37m | 11:22AM1.35m | 11:29PM1.21m | 12:06PM1.33m | 00:16AM1.06m | 12:54PM1.30m | 1:11AM0.94m | 1:50PM1.27m | 2:23AM0.87m | 2:55PM1.26m | 3:45AM0.85m | ||||||
Low Tide | 4:28AM0.11m | 4:40PM0.29m | 5:02AM0.20m | 5:32PM0.36m | 5:37AM0.30m | 6:28PM0.43m | 6:14AM0.39m | 7:33PM0.49m | 6:56AM0.47m | 8:49PM0.51m | 7:52AM0.53m | 10:06PM0.50m | |||||||
— | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:26 | — | — | |
— | — | 5:24 | — | — | 5:25 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:28 | — | |
mm | 4 | — | — | 5 | 2 | 2 | 1 | 2 | — | 5 | — | — | — | — | — | — | — | 1 | — |
Temp °C | 15 | 16 | 15 | 15 | 14 | 15 | 15 | 16 | 16 | 15 | 17 | 16 | 15 | 18 | 18 | 17 | 16 | 17 | 15 |
Feels °C | 12 | 12 | 11 | 13 | 12 | 13 | 12 | 13 | 14 | 14 | 14 | 14 | 13 | 15 | 16 | 16 | 13 | 12 | 11 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 17 | SSE 7 | S 11 | ESE 7 | S 9 | ESE 7 | ESE 6 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 9 | ESE 7 | ESE 6 | ENE 6 | ENE 7 | S 11 | ENE 7 |
95 | 148 | 192 | 182 | 85 | 76 | 68 | 79 | 83 | 104 | 100 | 62 | 140 | 58 | 53 | 103 | 102 | 2 | 70 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | S 12 | S 14 | ESE 7 | S 10 | SSW 13 | S 8 | S 11 | S 11 | ESE 11 | ESE 10 | ESE 10 | S 8 | ESE 8 | E 10 | S 12 | S 12 | — | S 10 |
19 | 25 | 36 | 86 | 113 | 53 | 49 | 82 | 55 | 102 | 80 | 81 | 10 | 14 | 2 | 3 | 3 | — | 2 | |
Swell 3 Height (m) Direction Period (s) | SE 7 | ENE 10 | S 18 | SSE 6 | ENE 10 | — | S 12 | E 9 | ESE 13 | S 10 | S 8 | S 8 | — | E 11 | S 13 | S 13 | — | — | SE 7 |
2 | 20 | 57 | 16 | 10 | — | 24 | 7 | 60 | 46 | 22 | 12 | — | 2 | 3 | 3 | — | — | 2 | |
Wind waves Height (m) Direction Period (s) | S 7 | SSE 6 | ESE 6 | — | — | ESE 7 | — | — | — | — | — | — | — | — | NE 3 | NE 6 | — | ENE 6 | NNW 3 |
150 | 222 | 77 | — | — | 88 | — | — | — | — | — | — | — | — | 5 | 154 | — | 85 | 5 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 120 | 6 | 6 | 1 | 38 | 2 | 35 | 84 | 11 | 0 | 0 | 0 | 0 | 53 | 0 | 0 | 37 | 0 |
Best forecast wave conditions in Sydney North Coast | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
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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.











