Surf Forecasts:
Big Wave Bay surf forecast from 9 Sep 2026:
- Best quality surf: Saturday 12 Sep, 8AM (local time) - 8ft (2.4m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 8AM (local time) - 8ft (2.4m), 8s period, ENE swell with 730 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 2AM (local time) - 6ft (1.9m), 7s period with E swell.
Best Forecast Surf Conditions for Big Wave Bay this week:
The surf forecast for Big Wave Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 11) at 2AM. The primary swell is predicted to be 1.9m and 7s period with a secondary swell of 1.6m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Wave Bay in the next 16 days are 2.4m 8s and forecast to arrive on Saturday (Sep 12) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 10s period and expected on Monday (Sep 14) at 5AM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 11th Sep) | 6ft (1.9m) 7s |
| Best Surf | 8AM (Sat 12th Sep) | 8ft (2.4m) 8s |
| Most Powerful | 8AM (Sat 12th Sep) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Alright, listen up. We’re in a bit of a slump. For the next week and a half, there just isn’t anything worth getting wet for. The trade winds are blowing onshore and cross-shore, chopping up whatever small, weak swell is trying to show up. We’re seeing some energy in the water around the 10th and 13th, but the short periods and bad wind make it all for nothing. You’re looking at a solid ten days of junky, cross-onshore slop. Nothing to get excited about.
That all changes on the morning of Sunday, the 20th. That’s the standout. The wind drops out completely and goes glassy, with just a slight air from the southeast at around 3 mph. The swell is a clean 3ft from the ESE with a very long 18-second period. This is real groundswell with a serious amount of energy behind it. The number is a strong 582, which is a massive jump from everything else we’ve seen. This long-period energy will wrap nicely into a spot like Big Wave Bay, which is smart about how it takes swell. It should be clean and have some nice, long lulls between sets, making the paddle out a breeze. This is the one.
The morning of Monday the 21st is a decent backup. Still glassy, with a slight air from the NNW at 3 mph. The swell is still around 3ft from the ESE, but with a period of 16 seconds and that energy has dropped a bit to a strong 404. A good wave, but Sunday is the call. After that, it fades away to almost nothing, so that's your window.
Water temp is around 83°, which is pretty much spot on for this time of year. So, mark your calendar for the 20th. That’s the one you don’t want to miss. It’s been a long wait, but it should be worth it.
Rusty, out.
Short Range ForecastLight rain (total 6mm), mostly falling on Thu night. Warm (max 29°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 36mm), heaviest during Sun afternoon. Warm (max 29°C on Sat afternoon, min 26°C on Sat morning). Winds decreasing (strong winds from the ENE on Sat night, light winds from the ESE by Mon night). | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | ENE 4 | E 4 | E 5 | E 6 | E 7 | E 7 | E 8 | E 9 | E 8 | E 8 | E 8 | E 7 | E 6 | E 6 | E 5 | ENE 5 | E 5 | E 14 | E 4 | ESE 5 | E 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 15 | 24 | 79 | 194 | 189 | 371 | 247 | 181 | 398 | 270 | 198 | 568 | 263 | 138 | 67 | 78 | 32 | 15 | 20 | 28 | 23 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-on | cross-off | cross | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off |
High Tide | 9:23PM0.98m | 7:53AM1.73m | 9:42PM1.05m | 8:41AM1.66m | 9:58PM1.14m | 9:24AM1.54m | 10:05PM1.25m | 10:03AM1.38m | 10:03PM1.37m | 10:35AM1.20m | 10:07PM1.48m | 10:55AM1.02m | 10:23PM1.57m | ||||||||
Low Tide | 2:05PM0.13m | 00:53AM0.69m | 2:38PM0.17m | 1:52AM0.57m | 3:08PM0.24m | 2:47AM0.47m | 3:35PM0.33m | 3:38AM0.38m | 4:00PM0.43m | 4:27AM0.33m | 4:24PM0.53m | 5:16AM0.32m | 4:46PM0.62m | ||||||||
 | |  |  | | | | |  |  |  |  | | | | | | | | |  | |
 | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — |
mm | — | — | 2 | 1 | — | 3 | — | — | — | — | 1 | 9 | 3 | 7 | 8 | 2 | 3 | 3 | 2 | 1 | 8 |
Temp °C | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 29 | 28 | 28 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 28 | 28 | 26 |
Feels °C | 29 | 27 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 27 | 28 | 26 | 25 | 26 | 28 | 28 | 29 | 30 | 29 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | S 8 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | E 7 | E 8 | E 9 | S 7 | E 8 | S 9 | SSE 8 | SSE 9 | SSE 9 | S 10 | S 10 | S 10 | S 11 | S 10 | S 10 | S 10 |
| kJ | 29 | 18 | 17 | 11 | 11 | 267 | 247 | 181 | 1 | 270 | 6 | 38 | 243 | 238 | 426 | 415 | 394 | 449 | 302 | 290 | 226 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | E 11 | — | — | SSW 8 | S 8 | N 3 | E 16 | S 9 | — | E 15 | E 15 | E 14 | E 14 | E 14 | E 10 | E 14 | E 13 | E 13 | E 13 |
| kJ | 2 | 2 | 2 | — | — | 6 | 5 | 1 | 5 | 2 | — | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 4 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | E 9 | — | — | — | — | — | S 8 | — | S 10 | E 15 | — | — | — | E 10 | E 14 | E 14 | E 14 | — | E 13 | E 13 |
| kJ | — | 2 | — | — | — | — | — | 4 | — | 2 | 5 | — | — | — | 2 | 4 | 4 | 15 | — | 3 | 3 |
Wind waves Height (m) Direction Period (s) | ENE 4 | E 4 | E 5 | E 6 | E 7 | E 7 | — | — | E 8 | NNE 3 | E 8 | E 7 | E 6 | E 6 | E 5 | ENE 5 | E 5 | E 5 | E 4 | ESE 5 | E 6 |
| kJ | 15 | 24 | 79 | 194 | 189 | 371 | — | — | 398 | 9 | 198 | 568 | 263 | 138 | 67 | 78 | 32 | 13 | 20 | 28 | 23 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 804 | 826 | 826 | 161 | 803 | 0 | 5 | 803 | 22 | 40 | 845 | 161 | 804 | 670 | 161 | 670 | 672 | 161 | 581 | 804 | 6 |
Best forecast wave conditions in Hong Kong | |||||||||||||||||||||
Best forecast wave conditions in China | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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Information about the Big Wave Bay Surf forecast
The above surf forecast table for Big Wave Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Wave Bay can be found by selecting the local surf guide option on the grey menu. Our Big Wave Bay 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 (Big Wave Bay) 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 Big Wave Bay 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.
Are you planning a holiday in Hong Kong? If you are looking for accommodation near Big Wave Bay, camping, hotels and holiday cottages in Hong Kong, consider staying in Hong Kong which is 9 km (6 miles) away. Other places in and around Hong Kong where you can find information about places to rent, and car hire include Aberdeen which is 10 km (6 miles) away, Kowloon, Shenzhen and Yantian.
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