Surf Forecasts:
Riyue Bay (Riyuewan) surf forecast from 20 Aug 2026:
- Best quality surf: Saturday 22 Aug, 11PM (local time) - 4.5ft (1.4m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 2AM (local time) - 8ft (2.5m), 9s period, SSW swell with 1,020 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 11PM (local time) - 4.5ft (1.4m), 9s period with S 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 Saturday (Aug 22) at 11PM. The primary swell is predicted to be 1.4m and 9s period with a secondary swell of 0.6m and 7s. 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 2.5m 9s and forecast to arrive on Friday (Aug 21) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 5s period and expected on Friday (Aug 21) at 11PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 22nd Aug) | 4.5ft (1.4m) 9s |
| Best Surf | 11PM (Sat 22nd Aug) | 4.5ft (1.4m) 9s |
| Most Powerful | 2AM (Fri 21st Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Riyue Bay (Riyuewan) over the next 16 days.
The Lowdown
Alright, let’s talk about Riyue Bay (Riyuewan). This is a point break that’s fairly exposed to swell and works best with a NE direction. The water’s sitting at 83°, which is a bit colder than normal for this time of year, but nothing too drastic.
The pattern for the next couple of weeks is tough. There’s a decent gap starting right now, with nothing really worth paddling out for until the morning of Tuesday the 25th. The last few days before that have some clean conditions but tiny waves and poor surf quality, so you’re better off waiting.
Tuesday the 25th afternoon is the first real standout. We’ve got a 4ft swell from the south with a 9-second period, and the combined energy is moderate at 634. The wind is a gentle breeze from the WSW, cross-off, so the waves will be clean. This is a beginner-friendly spot, so that size is just right. The swell direction is a bit off from the optimum NE, but the quality makes up for it.
Wednesday the 26th is interesting but quirky. The swell drops to 2ft but comes from the east with a very long 16-second period. That’s groundswell energy, and while it’s small, the long period will give the waves shape and power. The wind is light, cross-off, and the combined energy is 453, moderate. The caveat is that long-period swells like this can wall up on beach breaks, but this is a point break, so it should wrap in nicely. Crowds are possible here, so keep an eye.
Thursday the 27th afternoon also looks clean, with a 4ft south swell, 9-second period, and light cross-off wind. The combined energy is 377, moderate. Good for a beginner session.
The weekend of the 29th and 30th has glassy conditions, especially Saturday the 29th afternoon with zero wind and 3ft south swell. That’s about as clean as it gets, but the surf is ordinary, not great. The 30th afternoon picks up a bit with 4ft south swell and glassy wind, combined energy 365, good for a relaxed session.
Monday the 31st also has glassy mornings with 4ft south swell and a 10-second period, which is decent. The combined energy is 301, moderate.
After that, the first couple of days of September show some small, clean waves in the morning, but the energy is dropping. By Wednesday the 2nd afternoon and beyond, the swell disappears and the energy falls to weak levels, with tiny waves and poor conditions.
So, the best on offer is Tuesday the 25th afternoon for the clean 4ft south swell, and Wednesday the 26th afternoon for the rare long-period east swell, even though it’s small. If you’re a beginner, stick with the 25th. If you want to feel some real groundswell energy, the 26th is your call.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Thu morning. Warm (max 30°C on Fri afternoon, min 26°C on Thu morning). Winds decreasing (fresh winds from the SW on Fri afternoon, light winds from the WSW by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 31mm), heaviest during Tue afternoon. Warm (max 32°C on Sun afternoon, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | SSE 9 | SW 7 | SSW 9 | SSE 9 | SSE 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 8 | S 9 | S 8 | S 8 | WSW 7 | S 9 | E 16 | E 16 | S 9 |
Wave Graph | |||||||||||||||||||||
329 | 422 | 1020 | 579 | 564 | 340 | 190 | 239 | 239 | 186 | 210 | 291 | 161 | 257 | 201 | 136 | 241 | 177 | 198 | 245 | 155 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | glassy | cross-off | cross-off | cross-off |
High Tide | 3:19AM1.30m | 4:06AM1.32m | 5:07AM1.33m | 6:17AM1.36m | 7:22AM1.40m | 8:18AM1.44m | |||||||||||||||
Low Tide | 11:27AM0.48m | 1:11PM0.42m | 2:27PM0.35m | 3:20PM0.29m | 4:00PM0.23m | 4:35PM0.20m | 5:04PM0.19m | ||||||||||||||
6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | |
— | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — | |
mm | 11 | 3 | 1 | — | — | — | — | — | — | — | — | — | — | 8 | 4 | — | 9 | 10 | 4 | 3 | 1 |
Temp °C | 27 | 28 | 27 | 29 | 30 | 27 | 29 | 30 | 28 | 31 | 32 | 28 | 31 | 31 | 28 | 30 | 29 | 28 | 28 | 28 | 27 |
Feels °C | 29 | 29 | 27 | 29 | 29 | 28 | 30 | 31 | 31 | 33 | 34 | 31 | 34 | 35 | 34 | 34 | 34 | 34 | 33 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSE 9 | SSE 9 | ENE 7 | SSE 9 | SSE 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 8 | S 9 | S 8 | S 9 | S 8 | S 8 | S 8 | S 9 | S 8 | S 8 | S 9 |
329 | 422 | 5 | 579 | 564 | 340 | 190 | 239 | 239 | 186 | 210 | 291 | 161 | 257 | 201 | 136 | 210 | 177 | 133 | 133 | 150 | |
Swell 2 Height (m) Direction Period (s) | ENE 8 | NE 8 | ENE 7 | NE 7 | — | E 9 | — | — | — | — | — | — | E 10 | E 17 | E 18 | ESE 21 | SW 6 | E 18 | E 16 | SW 7 | E 15 |
23 | 14 | 5 | 2 | — | 2 | — | — | — | — | — | — | 2 | 6 | 6 | 42 | 61 | 160 | 198 | 62 | 155 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 12 | ESE 19 | WSW 6 | SW 7 | E 16 | SW 6 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 74 | 4 | 43 | 245 | 10 | |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 7 | SSW 9 | SW 6 | SW 7 | WSW 7 | SW 5 | SW 5 | SW 7 | SW 7 | SW 6 | SW 6 | SW 7 | SW 7 | WSW 6 | SW 7 | WSW 7 | — | WSW 6 | WSW 7 | SW 6 |
141 | 397 | 1020 | 244 | 305 | 244 | 143 | 60 | 65 | 103 | 120 | 6 | 93 | 114 | 15 | 59 | 241 | — | 155 | 204 | 42 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1379 | 1173 | 347 | 362 | 1391 | 1090 | 982 | 1248 | 621 | 621 | 576 | 621 | 621 | 621 | 580 | 1173 | 0 | 0 | 347 | 0 | 0 |
Best forecast wave conditions in Hainan | |||||||||||||||||||||
Best forecast wave conditions in China | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











