Surf Forecasts:
Riyue Bay (Riyuewan) surf forecast from 4 Sep 2026:
- Best quality surf: Friday 11 Sep, 5AM (local time) - 3.5ft (1.1m), 6s period, ENE swell with cross-offshore winds.
- Most powerful swell: Friday 11 Sep, 11AM (local time) - 4.5ft (1.3m), 6s period, ENE swell with 130 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 5AM (local time) - 3.5ft (1.1m), 6s period with ENE 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 Friday (Sep 11) at 5AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.8m and 6s. Another secondary swell of 0.4m and 8s is also forecast. 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 1.3m 6s and forecast to arrive on Friday (Sep 11) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Saturday (Sep 05) at 2AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 11th Sep) | 3.5ft (1.1m) 6s |
| Best Surf | 5AM (Fri 11th Sep) | 3.5ft (1.1m) 6s |
| Most Powerful | 11AM (Fri 11th Sep) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Riyue Bay (Riyuewan) over the next 16 days.
The Lowdown
Alright, let’s talk about Riyue Bay.
First off, truth is, the next week and a half is mostly dead. From Friday the 4th right through to mid-week the following week, we’re looking at tiny, weak swell. Waves are barely 2 to 2 feet, short period around 7 to 8 seconds, and the combined energy is weak – under 100 (52, 56, 68...). Wind’s often glassy or light, but with no real swell, it’s just not worth paddling out. The water temp is 81°, which is 4° cooler than normal for this time of year – that’s a noticeable drop, so bring a thicker suit.
We’ve got a big gap here. Nothing really changes until around Monday the 14th, when the swell starts to nudge up, but even then it’s only marginal. Tuesday the 15th is where things start to look a bit more interesting. On Tuesday morning, we’ve got 5 feet of swell from the ENE, period 8 seconds, light NNE wind giving us clean conditions. The combined energy jumps to 366 – that’s moderate, solid enough to feel. This is a good option for the beginner to intermediate crew, cause it’s not too big. The swell direction is ENE, and Riyue Bay (Riyuewan) is a point break that works best with NE swell, so it’s a decent match. Crowds can show up sometimes, so keep that in mind.
The standout stretch looks like Wednesday the 16th. Wednesday morning brings 5 feet from the ENE again, period 7 seconds, with NNW wind around 10 km/h giving us cross-offshore, clean faces. The energy is 394 – solid. Then Wednesday afternoon, the swell switches to the south at 5 feet, period 8 seconds, with NNE wind 15 km/h still cross-off and clean. Energy jumps to 588 – that’s moderate to strong, and the wind is clean. That afternoon session is the best on offer across the whole outlook. The south swell isn’t ideal for optimum direction, but with clean conditions and that energy, it’s worth a look.
From Thursday the 17th onward, things drop back. We get some surfable waves, 3 to 4 feet, but the wind turns more onshore or cross, and conditions get ordinary. Nothing special.
So, if you’re keen, aim for the 15th and especially the 16th. The 16th afternoon is the pick. The rest of the window is either flat or just average.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Sat afternoon. Warm (max 30°C on Fri morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Mon afternoon. Warm (max 29°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | S 7 | S 7 | S 8 | S 8 | S 7 | E 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 42 | 43 | 50 | 46 | 45 | 68 | 66 | 58 | 66 | 43 | 43 | 44 | 40 | 26 | 23 | 39 | 27 | 32 | 29 | 27 | 16 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | off | glassy | glassy | glassy | glassy | on | off | on | cross-on | glassy | glassy | on | glassy | cross-on | cross-on | cross-off | cross | cross | cross-off |
High Tide | 2:50AM1.46m | 3:53AM1.49m | 5:12AM1.51m | 6:34AM1.52m | 7:49AM1.52m | 8:54AM1.49m | 11:36PM0.81m | ||||||||||||||
Low Tide | 10:49AM0.32m | 12:34PM0.25m | 2:00PM0.16m | 3:02PM0.10m | 3:49PM0.08m | 4:27PM0.11m | 4:58PM0.19m | 2:54AM0.72m | |||||||||||||
 |  |  |  | |  | |  |  | | | | | | | | |  | | | | |
 | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | 1 | — | — | 4 | 2 | — | 4 | 2 | — | 5 | 1 | — | 5 | — | — | 1 | — | — | — | — |
Temp °C | 30 | 29 | 27 | 29 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 30 | 26 |
Feels °C | 34 | 33 | 31 | 33 | 32 | 31 | 32 | 33 | 31 | 32 | 32 | 32 | 34 | 34 | 32 | 33 | 33 | 32 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | S 7 | S 7 | S 7 | S 8 | S 8 | S 7 | S 7 |
| kJ | 42 | 43 | 50 | 46 | 45 | 68 | 66 | 58 | 66 | 43 | 43 | 44 | 40 | 26 | 23 | 39 | 27 | 32 | 29 | 27 | 15 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | E 11 | ENE 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | NE 7 | NE 7 | E 9 | E 9 | NE 9 | E 9 | E 9 | E 8 | E 9 |
| kJ | 8 | 8 | 8 | 20 | 22 | 8 | 8 | 8 | 2 | 7 | 8 | 7 | 2 | 2 | 2 | 2 | 3 | 2 | 1 | 1 | 2 |
Swell 3 Height (m) Direction Period (s) | NE 6 | ENE 7 | WSW 4 | NE 6 | NE 8 | NE 7 | E 7 | E 6 | NE 7 | NE 7 | NE 6 | NE 6 | E 10 | E 9 | NE 6 | NE 6 | E 9 | NE 6 | — | SE 4 | E 9 |
| kJ | 2 | 5 | 2 | 2 | 3 | 2 | 1 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 1 | 2 | 1 | — | 1 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | N 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ENE 2 | NE 5 | ENE 3 | E 5 |
| kJ | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 3 | 16 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1246 | 37 | 37 | 1173 | 1157 | 37 | 37 | 1173 | 37 | 1157 | 1157 | 75 | 1157 | 1248 | 1090 | 1609 | 1078 | 1078 | 736 | 1157 | 736 |
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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