Surf Forecasts:
Big Wave Bay surf forecast from 9 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 5AM (local time) - 2.5ft (0.7m), 4s period, SSW swell with 13 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 0.7m 4s and forecast to arrive on Wednesday (Aug 12) at 5AM. 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 8s period and expected on Thursday (Aug 13) at 2PM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Wed 12th Aug) | 2.5ft (0.7m) 4s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Right, mate, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.
To be brutally honest, it’s a flat spell and a half. We’re lookin’ at a long stretch of nothin’ much at all. The first real whisper of any surf doesn’t show up until Thursday the 20th, and even then it’s barely a bump. Before that, from now through the 19th, it’s a total write-off – tiny dribbles, mostly cross-shore winds, and a whole lot of nothin’. The water’s sittin’ at a warm 83°F, which is pretty much bang on average for this time of year, so at least a dip is comfortable.
Now, if you’re desperate for a paddle by Thursday the 20th, Big Wave Bay (Big Island) will see a tiny bump of 2ft from the east, but it’s cross-onshore with a short, weak period of 4 seconds. The energy is a measly (11). It’s not good, it’s messy, and it’s really only for the die-hards who just need to get wet. Friday the 21st morning is the closest thing to a highlight in the whole window. The wind goes glassy, dead calm, and you’ll see a 2ft easterly, but again, it’s a short-period 3-second windswell (8 energy). It’s clean, but there’s no power behind it. After that, it’s back to choppy, windy nothing for the rest of the run.
There’s no stand-out swell in this 16-day window. This is a blank run for the area. The setup is sheltered and exposed from the northeast, but the swell just isn’t showin’ up. Keep an eye on the charts, but for now, leave the boards in the shed.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 34°C on Sun afternoon, min 29°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Thu morning. Warm (max 30°C on Wed morning, min 27°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 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) | E 14 | E 13 | E 12 | E 11 | E 10 | S 9 | E 14 | SSW 4 | S 9 | E 11 | E 11 | SW 4 | S 8 | E 10 | S 8 | S 9 | SSW 9 | S 8 | E 12 | E 11 | S 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 4 | 3 | 2 | 2 | 0 | 4 | 8 | 0 | 2 | 2 | 6 | 0 | 2 | 0 | 0 | 0 | 0 | 3 | 3 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | cross-off | off | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 9:23PM0.83m | 5:16AM1.83m | 9:47PM0.85m | 6:37AM1.90m | 10:14PM0.86m | 7:42AM1.94m | 10:40PM0.88m | 8:36AM1.92m | 11:05PM0.93m | 9:22AM1.83m | 11:27PM1.00m | 10:03AM1.67m | 11:42PM1.09m | ||||||||
Low Tide | 12:38PM0.16m | 10:09PM0.83m | 1:42PM0.06m | 11:32PM0.81m | 2:34PM-0.00m | 00:42AM0.76m | 3:17PM-0.01m | 1:44AM0.68m | 3:55PM0.04m | 2:43AM0.61m | 4:27PM0.12m | 3:39AM0.56m | 4:56PM0.23m | 4:35AM0.53m | |||||||
 |  |  | | |  | | | | | |  |  | | | | | | | | | |
 | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — |
 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | — | 1 | 2 | — | 5 | 1 | — | — | — | — | — |
Temp °C | 33 | 34 | 31 | 32 | 32 | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 30 | 30 | 29 |
Feels °C | 35 | 35 | 34 | 33 | 33 | 35 | 33 | 31 | 34 | 32 | 32 | 32 | 32 | 32 | 31 | 32 | 33 | 33 | 34 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 8 | SSW 8 | E 10 | S 9 | S 9 | S 9 | S 9 | E 11 | S 9 | S 8 | — | S 8 | S 8 | S 9 | S 9 | S 8 | S 9 | S 9 | S 8 |
| kJ | 85 | 120 | 122 | 94 | 2 | 162 | 173 | 164 | 194 | 2 | 240 | 140 | — | 245 | 230 | 264 | 304 | 228 | 235 | 258 | 234 |
Swell 2 Height (m) Direction Period (s) | E 14 | N 3 | E 12 | — | E 10 | — | E 14 | — | — | — | E 11 | — | — | E 10 | — | — | — | — | E 12 | E 11 | — |
| kJ | 4 | 1 | 3 | — | 2 | — | 4 | — | — | — | 2 | — | — | 2 | — | — | — | — | 3 | 3 | — |
Swell 3 Height (m) Direction Period (s) | — | E 13 | — | E 11 | — | — | E 13 | — | — | — | E 11 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 4 | — | 2 | — | — | 3 | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 3 | W 4 | — | NW 3 | SSW 8 | — | — | SSW 4 | — | SSW 9 | — | SW 4 | S 8 | SSW 9 | — | — | SSW 9 | — | — | — | — |
| kJ | 1 | 12 | — | 2 | 151 | — | — | 8 | — | 289 | — | 6 | 228 | 349 | — | — | 413 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 40 | 40 | 144 | 272 | 6 | 6 | 813 | 40 | 819 | 683 | 819 | 822 | 813 | 29 | 6 | 1441 | 40 | 6 | 683 | 40 |
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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