Surf Forecasts:
Long Reef surf forecast from 13 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10PM (local time) - 6ft (1.9m), 9s period, SSE swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 1AM (local time) - 13ft (4.0m), 11s period, S swell with 3,447 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 1AM (local time) - 5ft (1.6m), 6s 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 Tuesday (Sep 15) at 1AM. The primary swell is predicted to be 1.6m and 6s period with a secondary swell of 1.2m and 6s. Another secondary swell of 0.5m and 10s 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 4.0m 11s and forecast to arrive on Thursday (Sep 17) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Sep 21) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Tue 15th Sep) | 5ft (1.6m) 6s |
| Best Surf | 10PM (Thu 17th Sep) | 6ft (1.9m) 9s |
| Most Powerful | 1AM (Thu 17th Sep) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Long Reef over the next 16 days.
The Lowdown
Alright, let’s break down Long Reef in feet. It’s a reef break that can get good, but this forecast has its ups and downs.
The water temp is about 63°, a bit cooler than average for the time of year – not a huge deal, but you’ll feel it.
Monday the 14th kicks off with weak energy. The morning has a 2ft south swell, 11-second period, with a light cross breeze – messy and marginal. The afternoon gets worse with onshore wind and chop. Forget it.
Tuesday the 15th: a tiny 3ft north-east swell, but a short 7-second period. The morning is clean with a cross-off breeze, but the waves are ordinary. Not worth it.
Then we get a big jump. Wednesday the 16th morning has a 12ft south swell, 10-second period, with strong energy. The cross-off wind keeps it clean on the face, but 12ft is big – expert only. The afternoon is even bigger and choppy. Thursday the 17th keeps that big energy with a 10ft south swell in the morning and clean wind – still only for the advanced crew.
After that, the size drops. Friday the 18th morning is the standout of the first week. A clean 5ft south-southeast swell, 9-second period, with glassy, dead calm wind. That is a beautiful morning. The afternoon gets onshore and choppy, but that morning session is the one.
Saturday the 19th morning is also clean with a light offshore wind and a small 3ft south swell – tidy but small. Then it fades into a few days of tiny, weak waves and poor conditions.
There’s a gap of a few days with nothing, then a pulse on Monday the 21st: a 8ft south swell, 12-second period, but onshore and choppy. Big energy, but wind ruins it. Tuesday the 22nd is similar – big swell, messy.
Now, the other standout: Wednesday the 23rd morning. A solid 5ft south swell, 12-second period, with glassy, calm wind. That’s another perfect morning to be out.
The rest of the forecast turns small and windy, with poor conditions. The final days around the 28th and 29th show another big south swell arriving – over 10ft with long periods and strong energy. But the wind is cross-on or light, and the quality is marginal. That’s a long-range look, so it’s promising but not guaranteed. If it cleans up, it’ll be heavy and for experts only.
So, the best bets are Friday the 18th morning and Wednesday the 23rd morning – glassy, clean, and fun. The big stuff in between is for the brave. The rest is either too small or too blown out.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 10°C on Wed night). Winds increasing (light winds from the NW on Mon night, strong winds from the S by Tue afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sat morning, min 10°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
AM | PM | 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 11 | S 11 | NE 6 | NE 7 | NE 7 | S 8 | S 10 | S 10 | S 11 | S 10 | S 10 | SSE 9 | SSE 9 | S 9 | S 9 | S 9 | S 16 | S 8 | S 9 | NE 5 | NE 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 123 | 81 | 184 | 77 | 46 | 1133 | 2095 | 2177 | 3447 | 1808 | 993 | 484 | 311 | 311 | 202 | 101 | 80 | 49 | 24 | 12 | 10 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | cross-off | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-on | off | glassy | cross-on | off | off | on | cross-off | cross-off | cross-off | 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 | 4:17PM0.24m | 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 | ||||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:54 | — | — | 5:54 | — | — | 5:52 | — | — | 5:50 | — | — | 5:48 | — | — | 5:48 | — | — |
 | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 21 | 20 | 17 | 13 | 13 | 14 | 14 | 14 | 14 | 13 | 18 | 17 | 17 | 26 | 23 | 20 | 27 | 30 | 24 |
Feels °C | 19 | 17 | 18 | 18 | 14 | 6 | 4 | 6 | 6 | 10 | 11 | 12 | 14 | 13 | 16 | 22 | 19 | 18 | 24 | 26 | 19 |
Swell 1 Height (m) Direction Period (s) | NE 6 | S 11 | NE 6 | NE 7 | NE 7 | NE 7 | NE 7 | ENE 12 | NE 13 | NE 13 | S 10 | SSE 9 | SSE 9 | S 9 | S 9 | S 9 | S 9 | S 8 | NE 5 | NE 5 | NE 5 |
| kJ | 54 | 81 | 109 | 77 | 46 | 11 | 2 | 15 | 7 | 7 | 993 | 484 | 311 | 311 | 202 | 101 | 76 | 49 | 6 | 10 | 10 |
Swell 2 Height (m) Direction Period (s) | S 11 | ENE 13 | S 10 | S 10 | S 9 | ENE 13 | ENE 14 | E 15 | — | S 20 | S 19 | NE 13 | S 18 | S 18 | S 16 | S 13 | S 16 | NE 5 | S 9 | S 8 | E 11 |
| kJ | 123 | 16 | 48 | 29 | 14 | 18 | 20 | 4 | — | 8 | 7 | 7 | 6 | 55 | 192 | 51 | 80 | 11 | 24 | 12 | 3 |
Swell 3 Height (m) Direction Period (s) | ENE 13 | — | ENE 12 | NE 13 | ENE 13 | S 16 | — | — | — | — | E 13 | S 19 | E 12 | E 12 | NE 4 | S 17 | NE 12 | S 15 | S 12 | S 12 | — |
| kJ | 17 | — | 15 | 6 | 17 | 5 | — | — | — | — | 3 | 7 | 3 | 3 | 5 | 89 | 5 | 38 | 12 | 11 | — |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | NE 6 | — | S 4 | S 8 | S 10 | S 10 | S 11 | S 10 | — | — | — | — | — | WNW 3 | NE 3 | NW 2 | NW 3 | — | SSW 4 |
| kJ | 80 | 59 | 184 | — | 8 | 1133 | 2095 | 2177 | 3447 | 1808 | — | — | — | — | — | 1 | 5 | 1 | 2 | — | 29 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 35 | 0 | 0 | 810 | 111 | 837 | 731 | 6 | 1 | 6 | 0 | 0 | 22 | 0 | 0 | 79 | 0 | 5 | 306 | 54 |
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.
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