Surf Forecasts:
Big Wave Bay surf forecast from 23 Aug 2026:
- Most powerful swell: Monday 31 Aug, 2AM (local time) - 4ft (1.2m), 5s period, E swell with 74 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 5s and forecast to arrive on Monday (Aug 31) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Monday (Aug 24) at 5AM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 31st Aug) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the cards.
To be straight up with you, Big Wave Bay is looking like a flat spell for the foreseeable future. There's no real surf to get excited about in this 16-day run. We're looking at a long gap with pretty much nothing on offer. The first recommendation isn't coming until late in the period, so you're looking at over a week of small, weak, and messy conditions before anything even registers.
The problem is the swell just isn't there. For days on end we're seeing tiny waves, mostly from the east, with periods all over the place but very little energy. The combined energy values are mostly in the single digits or low tens – that's weak stuff. The winds are a real problem too, often cross-shore or cross-onshore, and sometimes blowing a near gale. The water temp anomaly is average for this time of year, so no surprises there.
Now, the only time it looks like it might get a pulse is around Monday the 31st of August. The swell jumps up, but it's a short-period easterly windswell. The combined energy hits 620, which is a lot of raw power, but the wind is a fresh cross-shore from the northeast at 22 mph. It's going to be lumpy and difficult. For the more experienced surfers, it might offer some hefty, choppy waves, but it's a far cry from clean. The next day is similar, with strong cross-shore winds and messy conditions.
Honestly, this setup looks more like it's for the kite crowd than anyone paddling. The winds are strong and the surf is poor quality.
There's a very small window on the morning of Friday the 28th of August where the wind goes light offshore from the northwest, then even goes glassy in the afternoon. The swell is only 0.3 ft though, so you'd be bobbing around more than riding.
So the standout? There isn't one. Not really. The only day with any significant size is the 31st of August, but with those cross-shore winds and short-period swell, it's going to be a battle. It's the best of a bad lot, but it's not good.
Keep an eye on it, because things can change. But as it stands, it's a flat, windy outlook.
- Rusty
Short Range ForecastHeavy rain (total 29mm), heaviest during Wed morning. Warm (max 30°C on Sun night, min 28°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Sat afternoon. Warm (max 32°C on Fri afternoon, min 27°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 10 | E 14 | E 14 | SE 14 | ESE 17 | SE 16 | ESE 14 | ESE 15 | ESE 12 | ESE 10 | E 9 | E 11 | E 11 | E 11 | E 11 | E 11 | E 11 | E 10 | E 9 |
Wave Graph | |||||||||||||||||||
2 | 4 | 4 | 8 | 27 | 66 | 40 | 22 | 14 | 10 | 2 | 2 | 2 | 2 | 2 | 2 | 9 | 8 | 6 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross | cross | cross-off | cross | cross-on | on | cross-on | cross-on | cross-on | cross-off | off | glassy | off | off | off | cross-on |
High Tide | 4:11AM1.52m | 9:28PM0.88m | 5:59AM1.57m | 9:45PM0.88m | 6:57AM1.64m | 10:03PM0.89m | 7:37AM1.68m | 10:17PM0.92m | 8:13AM1.69m | 10:19PM0.98m | 8:47AM1.65m | 10:02PM1.08m | |||||||
Low Tide | 1:14PM0.36m | 10:57PM0.86m | 1:54PM0.29m | 00:07AM0.80m | 2:28PM0.24m | 1:04AM0.73m | 2:59PM0.21m | 1:56AM0.65m | 3:30PM0.21m | 2:46AM0.57m | 3:59PM0.24m | 3:35AM0.50m | |||||||
— | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
6:47 | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | |
mm | 5 | — | — | 6 | 2 | 2 | 6 | 7 | 1 | 3 | — | — | — | — | — | — | — | 10 | 51 |
Temp °C | 30 | 30 | 30 | 29 | 29 | 30 | 29 | 28 | 29 | 28 | 29 | 30 | 29 | 30 | 32 | 31 | 30 | 29 | 27 |
Feels °C | 34 | 33 | 32 | 31 | 34 | 34 | 33 | 31 | 32 | 31 | 33 | 34 | 34 | 34 | 36 | 36 | 33 | 32 | 29 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | E 10 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 8 | S 9 | S 9 | S 8 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 |
217 | 219 | 2 | 190 | 251 | 245 | 200 | 230 | 258 | 241 | 288 | 241 | 169 | 225 | 189 | 186 | 246 | 202 | 246 | |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 14 | SE 14 | ESE 17 | SE 16 | ESE 14 | ESE 12 | ESE 12 | ESE 10 | E 9 | E 8 | E 11 | E 11 | E 11 | E 11 | E 11 | E 10 | N 3 |
2 | 2 | 4 | 8 | 27 | 66 | 40 | 15 | 14 | 10 | 2 | 1 | 2 | 2 | 2 | 2 | 9 | 8 | 1 | |
Swell 3 Height (m) Direction Period (s) | — | E 14 | — | E 10 | SE 13 | E 8 | ESE 17 | ESE 15 | — | — | — | E 11 | E 8 | — | — | — | — | — | E 9 |
— | 4 | — | 2 | 7 | 4 | 30 | 22 | — | — | — | 2 | 1 | — | — | — | — | — | 6 | |
Wind waves Height (m) Direction Period (s) | — | — | S 8 | — | — | — | — | — | — | — | — | — | — | — | SW 2 | — | — | — | WSW 2 |
— | — | 264 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 1 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 144 | 161 | 40 | 40 | 43 | 3 | 683 | 683 | 161 | 144 | 740 | 40 | 6 | 6 | 6 | 40 | 6 | 1441 |
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.











