Surf Forecasts:
Big Wave Bay surf forecast from 14 Aug 2026:
- Best quality surf: Friday 21 Aug, 2AM (local time) - 5ft (1.5m), 7s period, E swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 2AM (local time) - 5ft (1.5m), 7s period, E swell with 246 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 2AM (local time) - 5ft (1.5m), 7s period with E swell.
Best Forecast Surf Conditions for Big Wave Bay this week:
The surf forecast for Big Wave Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 2AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 1.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Wave Bay in the next 16 days are 1.5m 7s and forecast to arrive on Friday (Aug 21) at 2AM. 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 Sunday (Aug 16) at 11PM.
| Wave Type | Time (HKT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Fri 21st Aug) | 5ft (1.5m) 7s |
| Best Surf | 2AM (Fri 21st Aug) | 5ft (1.5m) 7s |
| Most Powerful | 2AM (Fri 21st Aug) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Big Wave Bay over the next 16 days.
The Lowdown
Alright, let’s get into it. The next couple of weeks are pretty gutless for most spots, and Big Wave Bay is no exception. We’ve got a long stretch of almost nothing on offer, so if you’re keen for a paddle, you’ll need to be patient.
We’re looking at a real quiet spell from the 14th through to the 27th of August. There’s technically swell in the water, but it’s tiny—ankle-biters at best. For days on end, the energy’s weak, readings are mostly in the single digits or low double digits, like 2 or 47, and the waves are just messy, cross-shore junk. The 21st does see a bump in energy, hitting 127, but that comes with a 40 km/h offshore wind—clean, sure, but it's blowing a gale and it makes it nearly impossible to paddle into anything. That’s not a surf day, that’s a “watch the horizon” day. The water temp’s a touch above average, 84°, which is pretty normal for this time of year.
The first real glimmer of hope shows up on the morning of the 28th. It’s still not epic, but the swell’s starting to fill in at around 4ft from the E, and the wind is cross-off and clean. Energy’s moderate at 102. It’s surfable, small and clean, but it’s a beginner-friendly size. By the afternoon, it’s picking up to 5ft, but the wind swings more cross-shore and it gets a bit lumpy.
But the standout, the one that actually gets the heart rate up, is the morning of the 29th of August. That’s when a proper pulse of swell arrives. We’re talking 8ft of ESE groundswell at 8 seconds, and the energy jumps to 857—that’s strong, real strong. The wind is light and cross-onshore, which is a bit of a shame, but it’s still the best conditions we’ve seen in the whole run. That size is well overhead, and honestly, it’s pushing into expert territory. It looks like it’s going to be a proper, heavy day. The afternoon backs off slightly to 8ft but the wind goes more onshore.
So, there you have it. A whole lot of nothing, and then one morning that could be worth the wait. Keep your eyes on that 29th. It’s a long way out, so don’t book your flights, but it’s got potential.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Fri night. Warm (max 30°C on Sat morning, min 28°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Mon night. Warm (max 30°C on Mon afternoon, min 28°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the ENE by Wed night). | |||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
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) | S 7 | S 8 | S 8 | S 8 | E 11 | E 11 | E 10 | E 10 | E 11 | E 11 | E 11 | E 11 | E 3 | E 4 | ENE 4 | E 5 | E 7 | E 6 | E 8 | E 7 |
Wave Graph | ||||||||||||||||||||
0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 6 | 24 | 20 | 23 | 47 | 117 | 246 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross | cross | cross-off | cross | cross-off | glassy | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross-off |
High Tide | 11:27PM1.00m | 10:03AM1.67m | 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 | ||||||
Low Tide | 4:27PM0.12m | 3:39AM0.56m | 4:56PM0.23m | 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 | |||||||
— | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — | |
mm | 1 | 6 | 2 | — | — | 3 | — | 4 | 4 | 2 | 6 | 1 | — | — | — | — | 1 | — | 2 | 2 |
Temp °C | 29 | 29 | 30 | 30 | 29 | 30 | 30 | 30 | 29 | 30 | 29 | 29 | 29 | 28 | 29 | 29 | 29 | 30 | 31 | 29 |
Feels °C | 32 | 34 | 35 | 33 | 33 | 35 | 34 | 35 | 33 | 35 | 34 | 31 | 31 | 32 | 31 | 31 | 31 | 32 | 33 | 27 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 8 | S 8 | S 8 | S 8 | S 10 | S 9 | S 8 | S 10 | S 9 | S 9 | S 9 | E 8 | E 8 |
152 | 149 | 176 | 207 | 190 | 204 | 210 | 195 | 191 | 161 | 127 | 214 | 157 | 111 | 151 | 164 | 125 | 142 | 117 | 186 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | E 11 | E 11 | E 10 | E 10 | E 11 | E 11 | E 11 | E 11 | E 11 | E 11 | E 10 | E 10 | E 7 | — | S 9 | S 8 |
— | — | — | — | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 23 | — | 171 | 92 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 10 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | S 8 | — | — | — | — | — | SSW 8 | — | — | — | — | E 3 | E 4 | ENE 4 | E 5 | — | E 6 | — | E 7 |
— | 212 | — | — | — | — | — | 280 | — | — | — | — | 3 | 6 | 24 | 20 | — | 47 | — | 246 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1427 | 161 | 683 | 683 | 43 | 40 | 670 | 43 | 6 | 29 | 581 | 581 | 619 | 161 | 40 | 1441 | 581 | 581 | 740 | 0 |
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.











