Surf Forecasts:
Big Wave Bay surf forecast from 10 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 5AM (local time) - 2.5ft (0.7m), 4s period, SW swell with 20 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 Friday (Aug 14) at 8AM.
| 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
Alright, Rusty here again. I’ll put it plain: Big Wave Bay is looking pretty thin for most of this 16-day stretch. The first week and a half is mostly flat with tiny dribbles, so don’t get your hopes up for a proper session.
Starting on Monday the 10th, we’re looking at an east swell only 0.3ft, with combined energy sitting at 4—that’s barely a bump. The water temp is about average at 83°F, nothing unusual. The mornings are mostly clean with light cross-off winds, but the swell is just not there.
By Tuesday the 11th, it’s glassy again, but you’ve got the same tiny 0.3ft from the east with a 14-second period, so it’s more of a gentle shove than a ride.
Nothing really changes until Thursday the 20th, when we see a little life: 2ft from the ENE, combined energy up to 20. The wind is light and cross-off in the morning, so if you’re dying to get wet, that’s your first real window. Then Friday the 21st gives us a glassy morning with a 3ft swell from the ENE—short period at 4 seconds, so it’ll be a bit chunky, but the combined energy jumps to 36. That’s probably your best bet in the first two weeks—still nothing special, but clean and rideable.
Then on the 24th, a proper swell hits: 8ft from the east, 8-second period, and the combined energy is a massive 1000. That’s a lot of power, but the wind is fresh and cross-onshore, so it’ll be lumpy and messy. That size is too big for the average punter and really only for the brave or the kite crew.
The other standout is the 21st morning—glassy, clean, and some small but clean waves. But honestly, this is a quiet period. If you’re not in a rush, just wait it out—forecasts can still change.
Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Mon night. Warm (max 32°C on Mon morning, min 28°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 26mm), heaviest during Fri night. Warm (max 30°C on Fri morning, min 28°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 11 | SW 3 | E 10 | E 14 | SW 3 | SW 4 | E 11 | E 11 | S 9 | SSW 8 | S 8 | SSW 8 | S 8 | S 9 | SSW 8 | S 9 | E 11 | E 11 | S 9 | E 11 | E 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 3 | 2 | 4 | 4 | 10 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 2 | 2 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | glassy | cross | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross | cross-off | cross-off | cross | cross-off |
High Tide | 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 | 10:36AM1.47m | 11:44PM1.20m | ||||||||
Low Tide | 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 | 5:23PM0.35m | ||||||||
 |  |  | | |  |  | |  | | | | | | | | | | | | | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — |
 | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — |
mm | — | — | 2 | — | — | — | 1 | — | — | 1 | — | 6 | 2 | — | 9 | 4 | — | 4 | 1 | — | — |
Temp °C | 32 | 32 | 31 | 31 | 32 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 30 | 29 | 30 | 30 | 29 | 31 | 31 | 30 |
Feels °C | 34 | 33 | 35 | 36 | 35 | 33 | 32 | 31 | 32 | 31 | 31 | 31 | 33 | 32 | 33 | 34 | 33 | 33 | 35 | 34 | 34 |
Swell 1 Height (m) Direction Period (s) | SSW 8 | S 8 | S 9 | S 8 | S 9 | S 9 | S 9 | E 11 | S 9 | S 8 | — | S 8 | — | S 9 | S 8 | S 9 | S 9 | S 8 | S 9 | S 9 | S 8 |
| kJ | 94 | 90 | 154 | 113 | 171 | 158 | 230 | 2 | 190 | 169 | — | 173 | — | 311 | 196 | 282 | 264 | 191 | 270 | 220 | 195 |
Swell 2 Height (m) Direction Period (s) | E 11 | E 10 | E 10 | E 14 | — | E 12 | E 11 | E 11 | — | — | — | — | — | — | — | — | E 11 | E 11 | — | E 11 | E 10 |
| kJ | 2 | 2 | 2 | 4 | — | 3 | 2 | 2 | — | — | — | — | — | — | — | — | 2 | 2 | — | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | E 11 | — | — | E 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SW 3 | SSW 8 | — | SW 3 | SW 4 | — | S 9 | — | SSW 8 | S 8 | SSW 8 | S 8 | — | SSW 8 | — | — | — | — | — | — |
| kJ | — | 3 | 273 | — | 4 | 10 | — | 235 | — | 280 | 234 | 256 | 206 | — | 326 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 144 | 581 | 6 | 6 | 813 | 40 | 683 | 683 | 43 | 822 | 813 | 272 | 43 | 683 | 43 | 6 | 683 | 40 | 6 | 670 | 40 |
Best forecast wave conditions in Hong Kong | |||||||||||||||||||||
Best forecast wave conditions in China | |||||||||||||||||||||
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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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