Surf Forecasts:
Riyue Bay (Riyuewan) surf forecast from 13 Sep 2026:
- Best quality surf: Friday 18 Sep, 8AM (local time) - 4.5ft (1.3m), 8s period, ENE swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 2AM (local time) - 6ft (1.9m), 7s period, SSE swell with 387 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 2AM (local time) - 3.5ft (1.1m), 7s 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 Tuesday (Sep 15) at 2AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.4m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Riyue Bay (Riyuewan) in the next 16 days are 1.9m 7s and forecast to arrive on Monday (Sep 14) at 2AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 15th Sep) | 3.5ft (1.1m) 7s |
| Best Surf | 8AM (Fri 18th Sep) | 4.5ft (1.3m) 8s |
| Most Powerful | 2AM (Mon 14th Sep) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Riyue Bay (Riyuewan) over the next 16 days.
The Lowdown
Alright, let’s get into it. This is Rusty.
To be honest, the next week and a half or so at Riyue Bay (Riyuewan) is pretty bleak for proper surf. There’s a long stretch of small, onshore junk and lumpy conditions, so no real recommendations until we get to the second week. The first decent look comes on the morning of Monday, September 21st, but even that is just a glimmer.
The best on offer is looking at the morning of Sunday, September 27th. We’ve got a solid 8 ft swell from the SSE with a very long period of 12 seconds – that’s proper groundswell energy. The combined energy is 1757 (moderate strong stuff), so there’s plenty of weight behind it. The wind is light and cross-shore from the ENE, so the surface is clean. At this height, it’s getting into expert territory, and the long period will make it a little straight for beach breaks but perfect for a point. The water temp is a touch cooler than average for this time of year, sitting at 82°, but that’s a pretty normal deviation.
There’s also Monday, September 28th, with a 5 ft SSE swell but the wind goes cross-onshore, so it’s a bit messier. Not the standout.
The setup across the board is a point break, which loves these longer-period groundswells. Crowds are sometimes, so there’s likely to be a few out, but it won’t be a zoo on the standouts.
All up, you’re waiting a long time, but that morning on the 27th has some real promise. Keep an eye on that wind staying light.
– Rusty
Short Range ForecastHeavy rain (total 111mm), heaviest during Sun morning. Warm (max 27°C on Tue afternoon, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Fri afternoon. Warm (max 29°C on Thu afternoon, min 25°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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) | ENE 8 | SE 7 | SSE 7 | SSE 7 | SSE 7 | S 7 | E 14 | E 14 | E 13 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 7 | E 8 | E 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 194 | 227 | 387 | 261 | 114 | 104 | 36 | 33 | 32 | 45 | 92 | 90 | 112 | 137 | 134 | 134 | 257 | 163 | 134 | 118 | 131 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | cross-on | glassy | glassy | cross | glassy | glassy | on | glassy | cross-on | cross-on | cross-off | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 11:39AM1.17m | 11:53PM1.11m | 12:33PM1.02m | 00:12AM1.22m | 1:30PM0.88m | 00:33AM1.30m | 2:42PM0.77m | 00:59AM1.34m | 1:29AM1.35m | 2:08AM1.34m | 2:59AM1.31m | ||||||||||
Low Tide | 5:51PM0.54m | 6:18AM0.45m | 5:55PM0.64m | 7:15AM0.40m | 5:50PM0.71m | 8:13AM0.37m | 5:28PM0.73m | 9:18AM0.37m | 10:36AM0.37m | 12:11PM0.37m | |||||||||||
 | |  |  | |  | | |  |  | | |  | |  | | | | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — |
 | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — |
mm | 30 | 23 | 31 | 5 | 18 | 1 | 1 | 2 | — | — | 4 | — | 2 | 1 | — | 1 | 7 | 7 | 2 | 1 | 7 |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 27 | 24 | 28 | 28 | 26 | 28 | 29 | 26 | 27 | 28 | 26 | 29 | 29 | 26 |
Feels °C | 28 | 27 | 28 | 28 | 27 | 28 | 31 | 31 | 28 | 33 | 33 | 31 | 32 | 33 | 30 | 30 | 31 | 30 | 32 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 9 | ENE 8 | SSE 7 | SSE 7 | S 7 | S 6 | S 6 | S 5 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 13 | E 8 | E 7 | E 8 | E 7 |
| kJ | 194 | 137 | 59 | 261 | 114 | 104 | 36 | 24 | 9 | 45 | 92 | 90 | 112 | 137 | 134 | 134 | 35 | 163 | 134 | 118 | 131 |
Swell 2 Height (m) Direction Period (s) | E 15 | E 15 | E 14 | ENE 8 | ENE 8 | ENE 7 | ENE 6 | ENE 7 | ENE 8 | S 5 | E 13 | E 13 | S 4 | — | E 15 | — | — | E 14 | ENE 10 | SE 4 | E 13 |
| kJ | 17 | 17 | 16 | 35 | 23 | 20 | 8 | 5 | 21 | 4 | 13 | 13 | 1 | — | 4 | — | — | 16 | 32 | 3 | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | — | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | S 4 | S 4 | ENE 12 | — | — | — | — | — | ENE 13 | E 13 | S 7 |
| kJ | — | — | — | 16 | 15 | 16 | 35 | 33 | 32 | 13 | 2 | 1 | 30 | — | — | — | — | — | 32 | 13 | 1 |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 7 | SSE 7 | — | — | — | — | — | — | — | — | — | — | — | ENE 8 | — | ENE 8 | — | — | — | — |
| kJ | 162 | 227 | 387 | — | — | — | — | — | — | — | — | — | — | — | 126 | — | 257 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 347 | 349 | 347 | 353 | 1243 | 0 | 359 | 1075 | 75 | 359 | 349 | 0 | 356 | 1597 | 0 | 353 | 715 | 0 | 347 | 1157 | 0 |
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.
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