
Surf Forecasts:
Long Reef surf forecast from 14 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10PM (local time) - 5.5ft (1.7m), 9s period, S swell with glassy winds.
- Most powerful swell: Wednesday 16 Sep, 1PM (local time) - 11ft (3.5m), 10s period, S swell with 2,592 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 10PM (local time) - 5.5ft (1.7m), 9s 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 Thursday (Sep 17) at 10PM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.1m and 13s. 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 10s and forecast to arrive on Wednesday (Sep 16) at 1PM. 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 4s period and expected on Tuesday (Sep 15) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 17th Sep) | 5.5ft (1.7m) 9s |
| Best Surf | 10PM (Thu 17th Sep) | 5.5ft (1.7m) 9s |
| Most Powerful | 1PM (Wed 16th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Long Reef over the next 16 days.
The Lowdown
Alright, let’s have a look at what we’ve got coming up at Long Reef over the next couple of weeks.
The first few days are a write-off, I’m sorry to say. Tuesday the 15th is flat and messy – not even worth paddling out for. That pattern sticks through the start of Wednesday the 16th, but don’t let the early lull fool you because the second half of the week is where the real action kicks off.
Wednesday morning the 16th sees a big jump in energy. We’re talking a solid 12 ft S swell rolling in with a period of 10 seconds and combined energy ramping up to 2239 (strong). That’s a powerful, long-period groundswell. Wind is a cross-off SSW breeze at 19 mph, so it’ll be clean, but 12 ft is expert territory – this is not a day for learners. The swell direction (S) is a touch off the optimum SE, but it’s still going to pump hard. The crowd factor is “sometimes” so you won’t be alone, but there’s enough wave for everyone if you’ve got the skills.
Thursday morning the 17th is still pumping: 10 ft S swell, period 10 seconds, energy at 2905 (very strong), with a gentler 9 mph SSW cross-off. Still big, still clean, still only for the experienced crew. The water temperature is around average for this time of year, nothing out of the ordinary.
Friday morning the 18th is the standout window for the intermediate surfer. The swell has dropped to a much more manageable 5 ft from the S, period 9 seconds, energy at 485 (moderate). But the wind – oh boy – it goes glassy. A light N breeze at 3 mph and the wave comment says “good surf conditions.” That’s going to be smooth, clean, and fun for the better part of the morning. If you can only surf one session this week, make it Friday early.
Saturday morning the 19th is still clean with a 9 mph WSW offshore, but the swell has dropped right off to 3 ft. It’s rideable but small, and the energy is down to 207 (weak). Worth a paddle if you’re keen on a longboard.
From Sunday the 20th through Monday the 21st, it goes flat and choppy – total doldrums. Tuesday morning the 22nd is the next real highlight. We’ve got 6 ft S swell, period 11 seconds, energy at 1127 (strong), with glassy conditions. The forecast says “excellent surf conditions for experienced surfers.” That’s a solid session for the crew who know the reef. Crowds are “sometimes” so expect some company.
After that, the second week gets messy. From Wednesday the 23rd onward, the wind swings NE and cross-on, and the swell drops into the 2 ft to 6 ft range with short periods (6-7 seconds) and poor conditions. A few morning slots on the 28th and 29th of September have clean cross-off winds but the swell is small and weak (3 ft to 4 ft, energy around 200-300). It’s a longboard or groveler session at best.
So to wrap it up: the best of the best is Friday morning the 18th for the everyday surfer, and Tuesday morning the 22nd for the experienced crew. Everything else is either too big for comfort, too small to care, or blown out.
Stay stoked, and don’t sleep on that Friday glass-off.
- 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 | S 9 | S 9 | S 10 | S 10 | S 10 | S 10 | S 9 | S 9 | S 9 | S 10 | S 9 | S 10 | S 9 | S 9 | S 8 | S 8 | S 19 |
Wave Graph | |||||||||||||||||||
186 | 63 | 33 | 1261 | 2177 | 2491 | 2518 | 1584 | 679 | 402 | 380 | 301 | 210 | 149 | 111 | 78 | 35 | 22 | 27 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | off | off | on | cross-off | cross | cross-on | cross-off |
High Tide | 10:16PM1.23m | 10:35AM1.43m | 10:58PM1.10m | 11:15AM1.38m | 11:44PM0.99m | 12:01PM1.32m | 00:40AM0.91m | 12:57PM1.26m | 1:54AM0.86m | 2:05PM1.23m | 3:19AM0.86m | 3:17PM1.24m | |||||||
Low Tide | 4:12AM0.29m | 5:04PM0.30m | 4:45AM0.38m | 5:54PM0.38m | 5:21AM0.46m | 6:54PM0.44m | 6:05AM0.54m | 8:06PM0.49m | 7:06AM0.59m | 9:23PM0.48m | 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 | 111 | 837 | 731 | 111 | 1 | 35 | 0 | 0 | 22 | 0 | 0 | 22 | 0 | 3 | 67 | 3 |
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.










