
Surf Forecasts:
Big Wave Bay surf forecast from 11 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 5AM (local time) - 2ft (0.6m), 4s period, SW swell with 12 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 0.6m 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 1.5m 8s period and expected on Thursday (Aug 13) at 11PM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Wed 12th Aug) | 2ft (0.6m) 4s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty, and I’ve got the lowdown on what’s cookin’ for the next couple of weeks.
We’re looking at a pretty bleak start here, folks. For the next ten days or so, it’s practically a desert out there. From Tuesday the 11th right through to late August, the swell is basically non-existent at Big Wave Bay. We’re talking tiny, weak scraps of energy with nothing to get excited about. The water temp is sitting at a warm 84°, which is bang on average for this time of year, but that’s about the only thing that’s normal. The winds are mostly cross or cross-off, but there’s just no swell to work with. You’d be better off doing something else.
There is a bit of a tease on Friday morning the 14th, when we get a short window of glassy conditions with a light breeze, but with only 0.3 ft of east swell and combined energy of just 2 (weak), it’s not going to do anything. Saturday the 15th afternoon sees a sudden leap up to 2 ft of swell, but the period is an awful 3 seconds—that’s pure wind chop, not surf.
Then, just when you think it’s all over, we get a massive turnaround.
Mark your calendars for the morning of Monday the 25th of August. That’s the one. We’ve got a solid 10 ft swell rolling in from the ESE, with an 8-second period and combined energy reading a whopping 913 (strong). That’s a proper pulse of energy. And get this—the wind is forecast to be glassy from the NNW. That’s offshore and dead clean. For a sheltered spot like Big Wave Bay, that’s a dream scenario. Now, keep in mind that 10 ft is big. This is not for beginners; this is expert territory only, and with a bit of size and a clean face, it’s going to be game on for those who can handle it. The direction is from the ESE, which is a touch east of the optimum NE, but with that power and clean wind, it’ll still wrap in nicely.
The afternoon of the 25th stays clean with a 8 ft swell, but the wind swings onshore, so the morning window is your golden hour.
The next day, Wednesday the 26th morning, still has some decent leftover energy at 6 ft from the east with a clean offshore breeze from the NW. That’s still a good wave, but the standout is definitely that Monday morning. Expect crowds to be a factor, as it’s listed as “sometimes” busy, and for a wave of that quality after a long flat spell, it’ll be worth getting there early.
So, the long and short of it: endure a ten-day flat spell, then get ready for one absolute beauty of a morning on the 25th of August. It’s a long way out, so the details might shuffle a bit, but the potential is there for the best session in weeks.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 31°C on Tue morning, min 28°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Warm (max 31°C on Sun morning, min 27°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 | S 9 | E 12 | E 11 | E 11 | E 10 | SSW 8 | SSW 8 | SSW 8 | E 10 | S 8 | S 8 | S 8 | SW 3 | E 11 | E 11 | E 10 | E 10 | E 11 | E 11 | E 11 |
Wave Graph | |||||||||||||||||||||
4 | 0 | 3 | 2 | 2 | 2 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 5 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross |
High Tide | 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 | 11:01AM1.26m | 11:39PM1.31m | ||||||||
Low Tide | 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 | 5:31AM0.52m | 5:48PM0.47m | ||||||||
5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | |
— | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | |
mm | — | — | — | — | — | — | — | — | 3 | — | — | 2 | — | — | 1 | — | — | — | 1 | — | — |
Temp °C | 31 | 31 | 30 | 30 | 30 | 29 | 30 | 30 | 29 | 29 | 29 | 28 | 29 | 30 | 29 | 31 | 31 | 30 | 31 | 31 | 30 |
Feels °C | 34 | 33 | 33 | 33 | 32 | 33 | 32 | 32 | 31 | 34 | 32 | 32 | 33 | 33 | 33 | 34 | 33 | 34 | 35 | 33 | 34 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 9 | S 9 | S 9 | E 10 | E 10 | — | — | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 |
111 | 164 | 181 | 230 | 2 | 2 | — | — | 181 | 138 | 173 | 187 | 199 | 165 | 196 | 214 | 181 | 161 | 140 | 140 | 103 | |
Swell 2 Height (m) Direction Period (s) | E 14 | — | E 12 | E 11 | E 11 | — | — | — | — | E 10 | — | — | — | E 11 | E 11 | E 11 | E 10 | E 10 | E 11 | E 11 | E 11 |
4 | — | 3 | 2 | 2 | — | — | — | — | 2 | — | — | — | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | WSW 2 | — | — | S 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | — | — | — | — | SW 3 | — | — | — | — | — | SSW 2 | — |
— | 1 | — | — | 215 | 227 | 192 | 197 | 259 | — | — | — | — | 5 | — | — | — | — | — | 1 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 6 | 813 | 40 | 822 | 683 | 813 | 43 | 813 | 6 | 6 | 6 | 6 | 6 | 841 | 40 | 6 | 683 | 40 | 6 | 670 | 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.











