Surf Forecasts:
Riyue Bay (Riyuewan) surf forecast from 1 Sep 2026:
- Best quality surf: Tuesday 1 Sep, 2PM (local time) - 2.5ft (0.8m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 8PM (local time) - 2.5ft (0.8m), 9s period, S swell with 110 kJ wave energy.
- Next surfable swell (1★+): Tuesday 1 Sep, 2PM (local time) - 2.5ft (0.8m), 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 Tuesday (Sep 01) at 2PM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.1m and 5s. Another secondary swell of 0.8m 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 0.8m 9s and forecast to arrive on Tuesday (Sep 01) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Wednesday (Sep 02) at 5AM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2PM (Tue 1st Sep) | 2.5ft (0.8m) 9s |
| Best Surf | 2PM (Tue 1st Sep) | 2.5ft (0.8m) 9s |
| Most Powerful | 8PM (Tue 1st Sep) | 2.5ft (0.8m) 9s |
Table - best surf conditions forecast for Riyue Bay (Riyuewan) over the next 16 days.
The Lowdown
Alright, Rusty here, checking in on the swell situation for Riyue Bay.
Honestly, the first week and a half is a proper flat spell. You’re looking at really small, weak surf with combined energy barely hitting triple digits, mostly hanging around 34 to 198. The water is a bit colder than normal for this time of year, sitting at 81°, a good 3° off the average, so it feels a touch fresh. A few clean windows pop up, like the morning of Thursday the 5th with glassy conditions on a tiny 2ft ENE swell, but it's just not enough to get excited about. For the most part, the setup looks more interesting for a kite surfer than a paddle surfer, with a lot of those cross-onshore and breezy afternoons.
Then things finally change. The standout window, and the only one really worth circling on your calendar, hits Monday the 14th of September. That morning we get a pulse of clean, 4ft swell from the east with a period of 11 seconds, giving a solid moderate combined energy of 417. It gets even better that afternoon: glassy conditions, the wind drops to nothing, and that east swell builds to 5ft with a very long 14-second period. The combined energy jumps to 862, and the forecast says "very good surf conditions." That’s the pick of the whole run.
Tuesday the 15th of September hangs in there. The morning is a bit mixed with a cross-shore wind, but that 5ft east swell (13-second period, energy 763) still has some power. The afternoon glass-off is good for another 5ft wave. After that, Wednesday the 16th shows a clean morning on a 4ft east groundswell, but it fades through the day.
So to sum it up: don't bother with your board for the first 12 days. The real action is Monday the 14th of September. That afternoon, with the glass and the long-period east groundswell, Riyue Bay is going to be a proper point break dream. It's a beginner-friendly spot normally, but a 5ft set on a 14-second period will have plenty of punch for a good session. Keep in mind that long period swell can be a bit straight at certain beaches, but for a point break like this, it's pure gold. Crowds can show up here sometimes, and on a day like that, expect company.
Rusty.
Short Range ForecastHeavy rain (total 69mm), heaviest during Tue afternoon. Warm (max 31°C on Wed afternoon, min 24°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Sat afternoon. Warm (max 29°C on Fri morning, min 24°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 9 | S 9 | S 9 | S 8 | WSW 6 | S 8 | S 8 | S 7 | S 8 | S 8 | S 8 | S 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | S 8 | S 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 129 | 108 | 103 | 66 | 82 | 47 | 43 | 27 | 33 | 28 | 28 | 35 | 50 | 49 | 69 | 47 | 46 | 32 | 27 | 18 | 15 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | off | cross-off | glassy | off | glassy | on | cross-off | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | glassy | glassy |
High Tide | 1:00PM1.02m | 1:00AM1.19m | 2:03PM0.86m | 1:26AM1.31m | 3:41PM0.72m | 2:02AM1.40m | 2:50AM1.46m | 3:53AM1.49m | 5:12AM1.51m | ||||||||||||
Low Tide | 6:36PM0.61m | 7:58AM0.44m | 6:32PM0.68m | 9:15AM0.38m | 6:00PM0.70m | 10:49AM0.32m | 12:34PM0.25m | 2:00PM0.16m | 3:02PM0.10m | ||||||||||||
 |  |  |  |  |  | | |  | |  | | | | | | | | | |  | |
 | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — | 6:24 | — | — |
 | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — |
mm | 27 | 41 | 1 | — | — | — | — | — | — | — | 1 | 1 | — | 3 | 2 | 1 | 2 | 2 | 1 | 5 | 1 |
Temp °C | 26 | 25 | 25 | 29 | 31 | 26 | 30 | 31 | 27 | 29 | 29 | 26 | 28 | 28 | 26 | 28 | 29 | 26 | 28 | 28 | 27 |
Feels °C | 30 | 28 | 28 | 30 | 34 | 28 | 33 | 34 | 30 | 33 | 32 | 30 | 32 | 32 | 31 | 32 | 33 | 30 | 33 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 | S 7 | S 8 | S 8 | S 8 | S 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | S 8 | S 8 | S 7 |
| kJ | 129 | 108 | 103 | 66 | 43 | 47 | 43 | 27 | 33 | 28 | 28 | 35 | 50 | 49 | 69 | 47 | 46 | 32 | 20 | 18 | 15 |
Swell 2 Height (m) Direction Period (s) | SW 8 | NE 5 | SW 6 | SW 6 | SW 6 | NE 7 | ENE 7 | ENE 6 | NE 7 | ENE 7 | NE 7 | NE 7 | S 8 | S 8 | S 7 | S 8 | S 8 | S 7 | ENE 9 | ENE 9 | ENE 8 |
| kJ | 69 | 1 | 17 | 10 | 15 | 14 | 5 | 4 | 7 | 5 | 7 | 11 | 31 | 19 | 15 | 21 | 18 | 15 | 27 | 15 | 14 |
Swell 3 Height (m) Direction Period (s) | N 4 | E 12 | NE 7 | NE 7 | NE 7 | SW 6 | E 9 | E 9 | WSW 5 | E 10 | E 10 | ENE 10 | — | ENE 11 | — | ENE 6 | — | — | — | — | — |
| kJ | 2 | 3 | 2 | 8 | 7 | 10 | 2 | 2 | 3 | 2 | 7 | 19 | — | 12 | — | 3 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | N 3 | SW 8 | WSW 6 | — | WSW 6 | — | WSW 5 | SSW 3 | — | — | SSW 2 | NE 6 | — | — | — | — | — | WSW 4 | — | — | — |
| kJ | 7 | 84 | 71 | — | 82 | — | 9 | 1 | — | — | 1 | 26 | — | — | — | — | — | 2 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 75 | 1265 | 1265 | 75 | 717 | 1173 | 0 | 0 | 1092 | 0 | 715 | 1092 | 347 | 1530 | 1078 | 715 |
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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