Surf Forecasts:
Big Wave Bay surf forecast from 15 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 2PM (local time) - 4ft (1.2m), 6s period, E swell with 95 kJ wave energy.
Best Forecast Surf Conditions for Big Wave Bay this week:
The most powerful waves expected at Big Wave Bay in the next 16 days are 1.2m 6s and forecast to arrive on Thursday (Aug 20) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 8s period and expected on Saturday (Aug 15) at 11PM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 20th Aug) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Alright mates, let’s be straight with you. The next couple of weeks are looking like a proper flat spell for Big Wave Bay. The swell is just not happening and the wind is mostly making things ugly. It’s a dry spell, no doubt.
The 16th and 17th are basically a bust. We’re talking ankle-biters with onshore and cross-onshore winds. The energy is next to nothing at just 2 (weak). Save your energy.
Monday the 17th has a clean light breeze in the morning, but the surf is a tiny 0.3ft. Not worth the trip.
There’s a slow, sorry bump from the 18th to the 20th, but the wind is cross or cross-onshore, and moderate to fresh, making it all choppy and lumpy. Wave energy gets going a touch, reaching 94 (moderate) on the morning of the 20th, but it’s a short-period, weak 4ft of windswell. It’s messy.
We finally see clean conditions on Friday the 21st. There’s a cross-offshore breeze in the morning, and the afternoon goes full offshore at 25 km/h. But the swell story is a letdown, dropping back down to 2ft. It’s clean, but there’s nothing to ride.
A similar story on the 22nd with clean, cross-offshore winds but even less swell, bottoming out at 1ft. The weekend of the 23rd brings the wind onshore and the swell is still small and weak. All this poor energy is reflected in the low combined energy readings, mostly between 7 and 27 (weak).
The last week of August, from the 24th to the 31st, is more of the same. The swell stays small with the occasional jump in period, like a 15-second pulse on the 24th, but the height is a pathetic 0.3ft. The winds stay stubbornly cross-shore or onshore and fresh to strong, particularly on the 27th with a strong breeze at 40 km/h making a mess.
The best window of the whole 16 days is the 29th and 30th, but that’s only relative. On the 29th afternoon we get some energy (69 – moderate) and 4ft of east swell, but with a gentle cross-onshore. Then on the 30th morning, the wind turns cross-offshore and the surf is clean at 3ft, with energy around 52 (moderate). It’s not firing, but it’s the closest to a surfable wave you’ll see.
There is no standout in this window. Nothing that gets the heart racing. A real flat run.
Rusty.
Short Range ForecastModerate rain (total 11mm), heaviest on Sun night. Warm (max 31°C on Mon afternoon, min 28°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 65mm), heaviest during Fri afternoon. Warm (max 30°C on Thu afternoon, min 26°C on Fri afternoon). Winds increasing (light winds from the ENE on Tue night, fresh winds from the NE by Thu night). | ||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 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) | E 11 | E 11 | E 10 | E 10 | E 11 | SE 11 | SE 11 | E 3 | E 4 | E 4 | E 4 | E 5 | ESE 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 |
Wave Graph | |||||||||||||||||||
2 | 2 | 2 | 2 | 2 | 5 | 4 | 8 | 11 | 5 | 25 | 43 | 48 | 92 | 64 | 31 | 18 | 17 | 20 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross-off | off | off |
High Tide | 11:42PM1.09m | 10:36AM1.47m | 11:44PM1.20m | 11:01AM1.26m | 11:39PM1.31m | 11:20AM1.06m | 11:52PM1.41m | 11:39AM0.88m | 00:19AM1.48m | 12:03PM0.75m | 5:53PM0.73m | 00:55AM1.51m | 12:34PM0.63m | 1:42AM1.51m | |||||
Low Tide | 4:35AM0.53m | 5:23PM0.35m | 5:31AM0.52m | 5:48PM0.47m | 6:28AM0.52m | 6:11PM0.57m | 7:27AM0.53m | 6:30PM0.66m | 8:33AM0.54m | 2:49PM0.67m | 9:46AM0.54m | 3:01PM0.58m | |||||||
— | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
6:54 | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — | — | 6:50 | — | |
mm | 2 | 1 | 1 | 3 | 1 | — | 1 | 2 | — | — | — | — | — | — | — | 2 | 3 | 60 | 115 |
Temp °C | 29 | 29 | 30 | 30 | 30 | 31 | 30 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 30 | 29 | 28 | 26 | 26 |
Feels °C | 32 | 34 | 34 | 35 | 36 | 35 | 35 | 30 | 31 | 31 | 29 | 30 | 32 | 29 | 31 | 28 | 30 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 10 | ESE 6 | S 8 | S 9 | S 8 | S 8 | S 10 | S 10 |
185 | 160 | 199 | 157 | 165 | 140 | 103 | 76 | 90 | 86 | 58 | 117 | 48 | 48 | 73 | 90 | 68 | 198 | 219 | |
Swell 2 Height (m) Direction Period (s) | E 11 | E 11 | E 10 | E 10 | E 11 | SE 11 | SE 11 | SE 11 | E 11 | E 11 | E 10 | E 10 | S 8 | E 10 | — | E 6 | S 11 | — | E 6 |
2 | 2 | 2 | 2 | 2 | 5 | 4 | 4 | 2 | 2 | 2 | 2 | 69 | 2 | — | 31 | 57 | — | 20 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | ENE 7 | — | — | ENE 6 | E 6 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | 25 | — | — | 19 | 18 | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | E 3 | E 4 | E 4 | E 4 | E 5 | — | E 6 | E 6 | — | — | E 6 | — |
— | — | — | — | — | — | — | 8 | 11 | 5 | 25 | 43 | — | 92 | 64 | — | — | 17 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 683 | 144 | 161 | 40 | 1433 | 581 | 804 | 619 | 581 | 581 | 619 | 581 | 619 | 619 | 581 | 40 | 6 | 144 |
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.











