
Surf Forecasts:
Long Reef surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10PM (local time) - 6ft (1.8m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Wednesday 16 Sep, 1PM (local time) - 13ft (4.0m), 10s period, S swell with 2,948 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 10PM (local time) - 6ft (1.8m), 9s period with SSE 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 1.8m and 9s period with a secondary swell of 0.1m and 13s. 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 4.0m 10s and forecast to arrive on Wednesday (Sep 16) at 1PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Sep 19) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 17th Sep) | 6ft (1.8m) 9s |
| Best Surf | 10PM (Thu 17th Sep) | 6ft (1.8m) 9s |
| Most Powerful | 1PM (Wed 16th Sep) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for Long Reef over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s have a look at what’s coming down the pipe for Long Reef.
We’ve got a solid run of days ahead, but it’s a bit of a mixed bag to start. The first real call for a surf this week is Wednesday the 16th, but honestly, it’s not much to write home about. We’ve got a big 12ft south swell rolling in with a 10-second period, but that wind is howling out of the SSW at 22 mph, blowing cross-off. The wave energy is massive – 2471 (moderate to strong) – but that wind is spoiling it. It’s gonna be lumpy and just not worth paddling out for. Thursday the 17th is a similar story: 10ft south swell, same direction, but the wind drops to a manageable 12 mph, still cross-off. The energy jumps to 3160 (strong), and the morning session looks cleaner, though still marginal. Thursday afternoon gets a bit of a reprieve with an ESE onshore at 6 mph, but the swell drops to 7ft and the energy falls to 768 (weak moderate), so it’s still not great.
Now, Friday the 18th is where it gets interesting. That morning, the wind goes glassy – dead calm, N at 3 mph. The swell is a cleaner 6ft from the south, period 10 seconds, and the energy is 579 (weak moderate). The call is “expect very good surf conditions.” This is the standout. That glassy wind will keep the reef clean, and while 6ft might be pushing it for beginners, it’s a solid size for anyone with a bit of experience. The south swell direction is spot on for what Long Reef likes (optimum SE), so it’s a good one to aim for.
Saturday the 19th still has some life. Morning brings a WSW wind at 12 mph, offshore and clean, with 3ft south swell and 246 energy (weak). It’s small but rideable, and the offshore wind will make it smooth. Afternoon turns glassy again with 3ft, but it’s very ordinary.
Then we hit a stretch of nothing. From Sunday the 20th right through to Wednesday the 1st of October, the surf is small to tiny, the winds are mostly onshore or cross-on, and the conditions are described as poor almost every session. There’s a brief flicker on the 27th of September Sunday afternoon with a 6ft north-east swell but it’s only 6 seconds – short period, not much push. The 28th Monday morning has 5ft ENE swell with clean cross-off winds, but again, nothing special. It’s a long dry spell of about a week and a half with hardly anything worth paddling for.
The water temperature is sitting around average for this time of year, so no surprises there.
So to wrap it up, your best bet is Friday the 18th morning, with that clean glassy session and a decent south swell. After that, it goes quiet for a long time. Keep an eye on the 27th and 28th, but don’t hold your breath. This area can turn quick, so stay hopeful.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue night. Very mild (max 19°C on Fri morning, min 9°C on Wed night). Winds decreasing (fresh winds from the S on Wed afternoon, calm by Fri morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Sat afternoon, min 15°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 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 9 | S 10 | S 10 | S 11 | S 10 | S 9 | SSE 9 | S 10 | S 9 | S 9 | S 10 | S 9 | S 10 | S 10 | SSE 19 | S 16 | S 9 | S 8 | SSE 8 |
Wave Graph | |||||||||||||||||||
1569 | 2452 | 2541 | 2930 | 1732 | 758 | 474 | 518 | 397 | 207 | 149 | 106 | 66 | 198 | 123 | 130 | 111 | 127 | 163 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross | cross-off | on | off | glassy | cross-on | off | off | glassy | cross | cross-on | cross-on | cross-off | cross | cross-on | cross-on |
High Tide | 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 | 4:28AM0.91m | 4:18PM1.28m | |||||||
Low Tide | 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 | 9:41AM0.58m | 11:15PM0.37m | |||||||
— | 5:54 | — | — | 5:52 | — | — | 5:50 | — | — | 5:48 | — | — | 5:48 | — | — | 5:47 | — | — | |
— | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 |
Temp °C | 13 | 13 | 14 | 14 | 14 | 14 | 13 | 19 | 18 | 17 | 28 | 29 | 22 | 23 | 21 | 21 | 24 | 17 | 16 |
Feels °C | 6 | 4 | 5 | 6 | 10 | 11 | 12 | 15 | 14 | 15 | 24 | 26 | 18 | 21 | 18 | 20 | 19 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | NE 7 | ENE 12 | ENE 13 | NE 13 | S 10 | S 9 | SSE 9 | S 10 | S 9 | S 9 | S 10 | S 9 | S 10 | S 10 | S 8 | S 10 | S 9 | S 11 | SSE 8 |
7 | 15 | 16 | 7 | 1418 | 758 | 474 | 518 | 397 | 207 | 149 | 106 | 66 | 198 | 63 | 50 | 111 | 118 | 163 | |
Swell 2 Height (m) Direction Period (s) | ENE 14 | E 15 | — | — | E 13 | E 13 | E 13 | S 18 | S 17 | S 15 | S 15 | S 15 | S 17 | S 16 | SSE 19 | S 7 | NE 4 | NE 5 | S 11 |
18 | 4 | — | — | 3 | 3 | 3 | 58 | 148 | 115 | 40 | 18 | 24 | 20 | 123 | 23 | 3 | 4 | 112 | |
Swell 3 Height (m) Direction Period (s) | S 17 | — | — | — | S 19 | S 19 | S 19 | E 12 | E 12 | SE 8 | S 18 | ESE 7 | — | E 11 | S 13 | S 16 | E 10 | NE 5 | NE 5 |
5 | — | — | — | 7 | 7 | 7 | 3 | 3 | 23 | 57 | 5 | — | 2 | 28 | 130 | 2 | 4 | 1 | |
Wind waves Height (m) Direction Period (s) | S 9 | S 10 | S 10 | S 11 | S 10 | — | — | — | NE 2 | — | WSW 3 | — | — | — | ENE 3 | — | SSW 3 | S 8 | — |
1569 | 2452 | 2541 | 2930 | 1732 | — | — | — | 1 | — | 4 | — | — | — | 7 | — | 3 | 127 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 111 | 837 | 731 | 111 | 1 | 22 | 0 | 0 | 22 | 0 | 0 | 0 | 6 | 0 | 22 | 0 | 2 | 57 | 6 |
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.










