Surf Forecasts:
Long Reef surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 10PM (local time) - 5ft (1.5m), 6s period, NE swell with cross-offshore winds.
- Most powerful swell: Wednesday 26 Aug, 4PM (local time) - 7ft (2.1m), 7s period, SSE swell with 374 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 7AM (local time) - 3.5ft (1.1m), 5s period with NE 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 Thursday (Aug 20) at 7AM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.9m and 6s. Another secondary swell of 0.6m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Long Reef in the next 16 days are 2.1m 7s and forecast to arrive on Wednesday (Aug 26) at 4PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Friday (Aug 21) at 4PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 20th Aug) | 3.5ft (1.1m) 5s |
| Best Surf | 10PM (Thu 20th Aug) | 5ft (1.5m) 6s |
| Most Powerful | 4PM (Wed 26th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Long Reef over the next 16 days.
The Lowdown
Righto, let's have a look at what's on the table for the next couple of weeks. I gotta be straight with you, it's a pretty grim run for most of the period, especially for the first week. The water's sitting at 63°, which is about normal for this time of year, so at least you won't be needing a steamer just yet.
Looking at Long Reef, we've got a real stretch of nothing much happening. From Wednesday the 19th right through to the end of the week, it's mostly small, weak, and messy. The wind is all over the shop, mostly cross-shore or onshore, and the swell energy is weak, sitting between 20 and 243 (weak to moderate). The swell is short-period too, around 6-10 seconds, so not much push. It's a bit of a write-off. Then we go into a long gap – from Saturday the 22nd right through to Monday the 24th – there's practically nothing worth paddling out for. The swell is tiny, under 3 ft, and the energy is very low, around 20-91 (weak). You'd be better off staying home.
Now, there's a little flicker of hope on the 25th of August. Tuesday morning and afternoon, we get a bit of a pulse. The swell picks up to 5 ft from the NE, with a period of 7-8 seconds, and the energy gets up to 207-229 (moderate). The real kicker here is the wind: it's glassy, mate. No wind at all in the morning, and a light breeze from the NNW in the afternoon. That's about as clean as it gets. The swell direction is good for the reef, coming from the optimum SE direction. Don't get too excited though, it's still a bit inconsistent, and the rating is only a 2/10. But if you're keen, Tuesday the 25th is your best bet for a sneaky session. It's a bit small, but glassy and clean.
After that, things get a bit wild. From the 26th, the wind picks up strong, and the swell starts to build. On the 27th, we've got a 4 ft swell from the S with a 9-second period and energy of 296 (moderate), but the wind is onshore, making it choppy. Thursday the 27th afternoon is a no-go – 4 ft from the S but cross-on wind.
The last week of the month and into September is a real mixed bag. The 30th of August is a standout for size, but not for quality. Sunday afternoon we've got a 10 ft swell from the S with an 11-second period and energy of 1880 (very strong). Problem is, the wind is onshore from the ENE at 12 mph, making it a choppy mess. For an advanced break like Long Reef, that's gettable, but it won't be pretty. Then on the 31st, it gets even bigger – 16 ft from the S with a 14-second period and energy of 15476 (very strong). That's a massive, long-period groundswell. The comment says it's too big for this break, and I'd agree. That's expert-only territory, and even then, the cross-onshore wind will make it treacherous. Long-period swell like that is best at a point or reef, not a beach break, but at this size, it's a handful.
The first few days of September are still big, but easing. Tuesday the 1st is 15 ft from the S, then 13 ft, with energy in the thousands. The wind is still cross-onshore, so it's a bit of a washing machine. By Wednesday the 2nd, it's down to 10-12 ft, and Thursday the 3rd is 6-7 ft from the SE. The wind is still cross-onshore, so nothing to write home about. The energy is moderate to strong.
So, the bottom line: if you're desperate, aim for Tuesday the 25th of August for a clean, glassy session. Otherwise, the big swell at the end of the month is more for the thrill-seekers or the kite surfers, as the combination of strong wind and big swell is more interesting for them. For the rest of us, it's a waiting game.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri night. Warm (max 20°C on Thu morning, min 14°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Tue afternoon. Warm (max 24°C on Mon afternoon, min 13°C on Sun night). Wind will be generally light. | ||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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) | SE 9 | NE 6 | NE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 | NE 6 | SE 5 | S 10 | S 8 | S 11 | S 9 | S 11 | S 10 | ENE 9 | ENE 9 | SSE 5 |
Wave Graph | |||||||||||||||||||
81 | 69 | 77 | 130 | 51 | 26 | 14 | 9 | 16 | 10 | 89 | 57 | 55 | 62 | 79 | 94 | 96 | 101 | 85 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | cross-off | glassy | cross-on | cross-off | cross-off | off | glassy | glassy | cross-on | cross-off |
High Tide | 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 | 6:30AM1.00m | 6:27PM1.46m | |||||||
Low Tide | 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 | 11:55AM0.44m | 1:12AM0.24m | |||||||
— | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | |
— | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — | |
mm | — | — | — | — | — | — | 2 | — | — | 2 | — | — | — | — | — | 1 | 3 | 9 | 14 |
Temp °C | 16 | 20 | 19 | 19 | 18 | 16 | 16 | 17 | 17 | 16 | 16 | 16 | 16 | 23 | 24 | 19 | 13 | 14 | 15 |
Feels °C | 13 | 17 | 16 | 16 | 14 | 12 | 13 | 16 | 15 | 15 | 15 | 14 | 15 | 20 | 22 | 17 | 13 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 9 | ENE 6 | SE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 | S 5 | NE 6 | S 10 | S 8 | S 11 | ENE 6 | ENE 7 | S 10 | ENE 9 | ENE 9 | ENE 9 |
81 | 40 | 23 | 130 | 51 | 26 | 14 | 9 | 5 | 9 | 89 | 57 | 55 | 37 | 57 | 94 | 96 | 101 | 67 | |
Swell 2 Height (m) Direction Period (s) | E 12 | ESE 6 | E 10 | S 12 | S 11 | SE 7 | S 10 | S 9 | S 8 | S 8 | NE 9 | S 16 | S 7 | S 9 | S 11 | ENE 6 | S 9 | S 9 | S 16 |
3 | 37 | 2 | 3 | 2 | 2 | 2 | 6 | 12 | 6 | 20 | 42 | 23 | 62 | 79 | 31 | 62 | 39 | 20 | |
Swell 3 Height (m) Direction Period (s) | — | E 11 | — | — | S 11 | S 11 | SE 8 | S 6 | E 9 | E 9 | S 19 | S 19 | NE 8 | NE 8 | NE 8 | NE 9 | S 16 | S 16 | — |
— | 2 | — | — | 2 | 2 | 2 | 1 | 2 | 2 | 7 | 7 | 18 | 15 | 18 | 22 | 21 | 20 | — | |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 6 | NE 6 | — | — | NW 3 | NNW 3 | — | NE 6 | SE 5 | ENE 6 | ENE 9 | NE 4 | — | — | — | SSW 3 | S 4 | SSE 5 |
72 | 69 | 77 | — | — | 4 | 2 | — | 16 | 10 | 22 | 45 | 23 | — | — | — | 1 | 16 | 85 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 61 | 0 | 0 | 45 | 189 | 264 | 399 | 228 | 0 | 35 | 0 | 0 | 0 | 0 | 0 | 6 | 2 |
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.











