Surf Forecasts:
Big Wave Bay surf forecast from 20 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 5AM (local time) - 5ft (1.5m), 7s period, E swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 5AM (local time) - 6.5ft (2.0m), 8s period, ENE swell with 428 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 5AM (local time) - 5ft (1.5m), 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 Tuesday (Aug 25) at 5AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 0.2m and 18s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Big Wave Bay in the next 16 days are 2.0m 8s and forecast to arrive on Wednesday (Aug 26) at 5AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 10s period and expected on Saturday (Aug 22) at 2AM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 25th Aug) | 5ft (1.5m) 7s |
| Best Surf | 5AM (Tue 25th Aug) | 5ft (1.5m) 7s |
| Most Powerful | 5AM (Wed 26th Aug) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what Big Wave Bay has in store for us over the next couple of weeks. I'll be straight with you – it's a tough stretch.
Right off the bat, we are looking at a long, dry spell. From Thursday the 20th of August all the way through to Saturday the 29th of August, there is simply nothing worth paddling out for. The first surf that's even worth a mention won't show up until Sunday the 30th of August. That’s over a week of flat, windy, and messy conditions.
The water temp is sitting at a warm 84°F, which is pretty much spot on average for the time of year, so at least the swim will be nice.
The first real glimmer of hope comes on Sunday the 30th of August. The morning is actually looking like the standout of the entire forecast. We’ll have a clean 4ft swell coming from the east, with the wind swinging offshore out of the north-northeast at a light 3 mph. The combined energy is a weak 165, but those are the cleanest conditions we’ll see. It’s a rare moment of glassy, clean conditions at this sheltered spot, but the waves are small and weak. If you’re a beginner, this is the time to get wet.
The following morning, Monday the 31st of August, also has potential. The swell bumps up to 5ft from the east with a period of 9 seconds, and the combined energy is a moderate 372. Winds are light offshore from the north-northeast at 6 mph, keeping it clean. This is a proper groundswell, and for a setup like Big Wave Bay, that longer period will bring some better shape and a bit more push. This is your best bet for the whole window, but it’s over a week away, so keep an eye on it.
After that, things get messy again with strong onshore winds and stormy conditions pushing into September. There’s nothing else that’s going to deliver.
So, to wrap it up: don't bother this week. Save your energy for the morning of Sunday the 30th of August if you need a tiny, clean wave, or circle Monday the 31st of August for the best chance at something with a bit of a punch – but it's a long-range call, so don't bet the farm on it.
Rusty.
Short Range ForecastModerate rain (total 19mm), heaviest on Sat night. Warm (max 30°C on Sat afternoon, min 27°C on Thu morning). Winds decreasing (fresh winds from the ENE on Thu morning, calm by Sat morning). | Days 4-6 Weather SummaryHeavy rain (total 23mm), heaviest during Mon morning. Warm (max 30°C on Sun morning, min 27°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 6 | E 6 | ENE 5 | ENE 5 | S 9 | SSW 10 | S 9 | E 11 | E 11 | E 11 | E 11 | ENE 3 | ENE 6 | E 6 | ENE 7 | ENE 7 | E 8 | ENE 7 | E 7 | E 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 72 | 21 | 6 | 2 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 3 | 83 | 24 | 175 | 204 | 89 | 355 | 85 | 45 | 334 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross | cross | cross | cross-on | cross | cross-off | cross | glassy | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 12:03PM0.75m | 5:53PM0.73m | 00:55AM1.51m | 12:34PM0.63m | 1:42AM1.51m | 1:15PM0.54m | 2:44AM1.50m | 4:11AM1.52m | 9:28PM0.88m | 5:59AM1.57m | 9:45PM0.88m | 6:57AM1.64m | 10:03PM0.89m | ||||||||
Low Tide | 8:33AM0.54m | 2:49PM0.67m | 9:46AM0.54m | 3:01PM0.58m | 11:05AM0.50m | 3:17PM0.51m | 12:20PM0.43m | 1:14PM0.36m | 10:57PM0.86m | 1:54PM0.29m | 00:07AM0.80m | 2:28PM0.24m | 1:04AM0.73m | ||||||||
 |  |  | |  | | | |  | | | |  | | | | | | | |  | |
 | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
mm | 2 | — | 4 | 5 | — | 1 | 1 | — | 6 | 1 | 1 | 5 | 7 | — | 7 | — | — | 2 | — | — | — |
Temp °C | 28 | 29 | 28 | 29 | 29 | 29 | 29 | 30 | 29 | 30 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 28 | 31 | 32 | 31 | 32 | 33 | 34 | 34 | 32 | 35 | 35 | 35 | 34 | 36 | 34 | 35 | 32 | 31 | 29 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 10 | S 10 | S 9 | S 10 | S 9 | S 9 | E 11 | S 9 | SSW 9 | S 8 | S 10 | S 9 | S 9 | S 10 | S 10 | E 7 | S 10 | S 9 | E 7 |
| kJ | 320 | 390 | 453 | 646 | 492 | 618 | 427 | 356 | 2 | 220 | 232 | 173 | 267 | 212 | 157 | 230 | 179 | 246 | 190 | 175 | 106 |
Swell 2 Height (m) Direction Period (s) | ENE 6 | E 6 | ENE 5 | ENE 5 | — | — | — | E 11 | — | E 11 | E 11 | E 10 | E 6 | E 6 | ESE 18 | E 7 | SE 16 | S 9 | E 7 | E 7 | S 9 |
| kJ | 72 | 21 | 6 | 2 | — | — | — | 2 | — | 2 | 2 | 2 | 50 | 24 | 33 | 97 | 66 | 136 | 85 | 45 | 164 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | SE 15 | SE 16 | SE 14 | SE 17 | SE 20 | SE 17 | ESE 16 | SE 12 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 10 | 8 | 45 | 16 | 76 | 24 | 6 | — |
Wind waves Height (m) Direction Period (s) | E 5 | — | — | — | — | SSW 10 | — | — | SSW 9 | — | — | ENE 3 | ENE 6 | — | ENE 7 | ENE 7 | E 8 | ENE 7 | — | — | ENE 7 |
| kJ | 70 | — | — | — | — | 904 | — | — | 352 | — | — | 3 | 83 | — | 175 | 204 | 89 | 355 | — | — | 334 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 813 | 683 | 43 | 683 | 832 | 819 | 683 | 671 | 40 | 40 | 6 | 40 | 40 | 40 | 3 | 683 | 581 | 581 | 683 | 581 | 161 |
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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