
Surf Forecasts:
Riyue Bay (Riyuewan) surf forecast from 4 Aug 2026:
- Best quality surf: Wednesday 5 Aug, 8PM (local time) - 2.5ft (0.8m), 17s period, ESE swell with cross-offshore winds.
- Most powerful swell: Friday 7 Aug, 2AM (local time) - 3.5ft (1.0m), 18s period, E swell with 625 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 8AM (local time) - 2ft (0.6m), 16s period with E swell.
Best Forecast Surf Conditions for Riyue Bay (Riyuewan) this week:
The surf forecast for Riyue Bay (Riyuewan) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 05) at 8AM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 0.5m and 6s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Riyue Bay (Riyuewan) in the next 16 days are 1.0m 18s and forecast to arrive on Friday (Aug 07) 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 1.4m 6s period and expected on Monday (Aug 10) at 5PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 5th Aug) | 2ft (0.6m) 16s |
| Best Surf | 8PM (Wed 5th Aug) | 2.5ft (0.8m) 17s |
| Most Powerful | 2AM (Fri 7th Aug) | 3.5ft (1.0m) 18s |
Table - best surf conditions forecast for Riyue Bay (Riyuewan) over the next 16 days.
The Lowdown
Right, let’s have a proper look at the next couple of weeks, yeah? To be honest, the first few days are a bit of a write-off. We’ve got some swell pushing through, but it’s coming in short and messy, and the wind just isn’t playing the game. You’ll be staring at a lot of bumpy, weak lines for the first few days. The water’s sitting at 84°, which is about normal for this time of year, so at least it’ll be warm while you’re waiting.
The first real window where things start to clean up is Thursday the 6th. The swell bumps up to 3ft from the E with a 17-second period, and that’s proper groundswell energy (585). It’s still small, but the afternoon sees a cross-off breeze and the surface turning clean. It’s not going to be epic, but it’s the first time it’ll genuinely be worth getting wet.
Friday the 7th is the standout of this first stretch. It’s still only 3ft, but that E swell is holding at 17 seconds, and the afternoon goes glassy. That’s the kind of clean, lined-up point surf that Riyue Bay (Riyuewan) does well. The crowd factor is a bit of a lottery—it can get busy—but if you get it on a quieter bank, it’ll be well worth it. The energy is solid (480-654), so even though it’s small, it’ll have some push.
After that, the swell drops off and the quality fades. The wind goes all over the place, and we’re back to short-period, weak S/SW slop for a good stretch. From the 8th through to around the 13th, it’s mostly small, onshore, and confused. There are moments where it looks clean—like the 10th morning—but the swell is just too weak and short to get excited about. Honestly, this is a period where you’re better off doing something else.
Now, here’s where it gets interesting. The 16th of August is the one to circle. The swell jumps to 6ft, and while the period is a short 7 seconds, the energy is up there (318). It’s still a bit rough around the edges, but that’s the biggest surf we’ve seen, and it could throw up some fun, punchy waves. It’s not a classic, but it’s the best of a pretty average bunch.
The very end of the window, around the 18th and 19th, shows a return to clean, glassy conditions, but the swell has backed down to 3ft from the S. It’s not big, but if the wind stays light, there could be some fun, clean little runners. It’s worth a paddle if you’re desperate for a wave.
So, to call it: the best on offer is Friday the 7th for the clean, long-period E swell, and Sunday the 16th for the biggest, most powerful surf of the run. The 7th is more of a quality call, the 16th is more about size. If you can only pick one, I’d go for the 7th—it’ll be cleaner and more fun on the point. The rest? It’s a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 44mm), heaviest during Fri night. Warm (max 30°C on Thu afternoon, min 26°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Sat afternoon. Warm (max 33°C on Sun afternoon, min 26°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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 16 | ESE 17 | ESE 17 | ESE 17 | E 17 | E 18 | E 17 | E 16 | E 14 | E 13 | S 8 | S 8 | S 8 | SW 6 | S 8 | S 8 | S 9 | S 9 | S 9 | S 9 | S 9 |
Wave Graph | |||||||||||||||||||||
193 | 307 | 390 | 482 | 476 | 625 | 586 | 422 | 138 | 80 | 136 | 136 | 78 | 132 | 108 | 116 | 194 | 181 | 150 | 189 | 235 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | glassy | cross-off | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:32PM0.88m | 3:07AM1.21m | 4:13PM0.70m | 3:43AM1.33m | 4:31AM1.44m | 5:32AM1.53m | 6:40AM1.61m | 7:48AM1.67m | |||||||||||||
Low Tide | 9:04AM0.63m | 7:59PM0.60m | 10:47AM0.53m | 7:36PM0.65m | 12:38PM0.39m | 2:09PM0.24m | 3:16PM0.10m | 4:11PM0.00m | 4:58PM-0.04m | ||||||||||||
6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
— | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | |
mm | 1 | 8 | 8 | — | 5 | 4 | — | 9 | 9 | 1 | 12 | 4 | — | — | — | — | 1 | — | — | 1 | — |
Temp °C | 29 | 29 | 27 | 29 | 30 | 28 | 30 | 30 | 28 | 30 | 30 | 29 | 31 | 33 | 29 | 32 | 33 | 29 | 31 | 28 | 27 |
Feels °C | 32 | 32 | 31 | 32 | 34 | 33 | 34 | 35 | 33 | 34 | 36 | 35 | 34 | 37 | 33 | 35 | 35 | 32 | 34 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | E 16 | ESE 17 | ESE 17 | ESE 17 | E 17 | E 18 | E 17 | E 16 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 9 | S 9 | S 9 | S 9 |
193 | 307 | 390 | 482 | 476 | 625 | 586 | 422 | 133 | 74 | 136 | 136 | 78 | 80 | 108 | 116 | 194 | 181 | 150 | 189 | 235 | |
Swell 2 Height (m) Direction Period (s) | E 8 | S 6 | S 7 | S 7 | E 7 | S 7 | S 7 | S 7 | E 14 | E 13 | E 12 | E 12 | E 10 | E 10 | E 16 | E 15 | E 15 | E 15 | E 15 | E 16 | E 15 |
5 | 16 | 38 | 43 | 8 | 51 | 59 | 54 | 138 | 80 | 47 | 25 | 8 | 2 | 5 | 4 | 4 | 4 | 4 | 5 | 17 | |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | E 7 | E 7 | — | SW 6 | E 7 | E 7 | E 16 | ESE 18 | E 17 | E 15 | E 9 | — | E 16 | E 10 | E 11 | E 9 | SE 10 | SE 11 | SE 10 |
5 | 10 | 17 | 15 | — | 9 | 9 | 4 | 137 | 61 | 52 | 18 | 2 | — | 5 | 2 | 2 | 2 | 4 | 4 | 4 | |
Wind waves Height (m) Direction Period (s) | SSW 6 | SW 5 | WSW 7 | SW 6 | SSW 6 | WSW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | SW 7 | SW 6 | SW 8 | SW 8 | SW 6 | WSW 6 |
41 | 72 | 29 | 8 | 101 | 41 | 47 | 38 | 16 | 17 | 120 | 42 | 26 | 132 | 32 | 51 | 143 | 91 | 99 | 133 | 109 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 347 | 347 | 0 | 347 | 0 | 0 | 347 | 0 | 0 | 347 | 37 | 0 | 0 | 347 | 349 | 0 | 930 | 621 | 576 | 0 | 621 |
Best forecast wave conditions in Hainan | |||||||||||||||||||||
Best forecast wave conditions in China | |||||||||||||||||||||
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Information about the Riyue Bay (Riyuewan) Surf forecast
The above surf forecast table for Riyue Bay (Riyuewan) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Riyue Bay (Riyuewan) can be found by selecting the local surf guide option on the grey menu. Our Riyue Bay (Riyuewan) 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 (Riyue Bay (Riyuewan)) 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 Riyue Bay (Riyuewan) 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 Hainan? If you are looking for accommodation near Riyue Bay (Riyuewan), camping, hotels and holiday cottages in Hainan, consider staying in Wanning which is 26 km (16 miles) away. Other places in and around Hainan where you can find information about places to rent, and car hire include Li-an which is 27 km (17 miles) away, Baoding, Bacun and Baimalingcaifachang.











