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Riyue Bay (Riyuewan) surfForecast / Hainan / China
48hr Weather and Surf, issued 1 am Monday 18 May 2026 CSTForecast update in hr min s Forecast update imminent
Riyue Bay (Riyuewan) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Riyue Bay (Riyuewan) sea temperature is
29.0° C
(Which is normal for this time of year)How big are the waves at Riyue Bay (Riyuewan) today?
The current surf forecast for Riyue Bay (Riyuewan) at 7AM is: 1.0m 6s primary swell from a South-southeast direction and 0.7m 8s secondary swell from a East-northeast direction (forecast issued at 01:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 3.5ft (1.0m) | 6s |
| Afternoon (18 May) | 3ft (0.9m) | 9s |
| Evening (18 May) | 3ft (0.9m) | 8s |
Table - waves today at Riyue Bay (Riyuewan). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 49mm), heaviest during Wed afternoon. Warm (max 28°C on Mon morning, min 25°C on Wed afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSE 6 | SSE 6 | SSE 6 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 9 | ENE 9 | E 8 | E 8 | S 7 | S 7 | S 7 | S 7 | S 7 | S 6 | SSE 6 | SSE 6 | S 6 | S 7 | S 7 | S 7 | S 7 | |
103 | 82 | 82 | 106 | 129 | 123 | 120 | 123 | 123 | 116 | 119 | 144 | 163 | 139 | 131 | 107 | 86 | 134 | 134 | 115 | 134 | 138 | 138 | 138 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross | cross | cross-on | cross-on | cross | cross | cross-on | cross-on | |
High Tide | 10:07AM1.71m | 10:51AM1.76m | 11:39AM1.76m | |||||||||||||||||||||
Low Tide | 6:48PM-0.11m | 7:47PM-0.13m | 8:47PM-0.09m | |||||||||||||||||||||
 |  |  | |  | | | | | | | | | | |  | | | | | |  | | | |
 | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — |
1 | — | 1 | 1 | — | 1 | 1 | — | 2 | 2 | 1 | 2 | 1 | 1 | — | — | 2 | 3 | 3 | 4 | 13 | 1 | — | — | |
Temp °C | 26 | 27 | 27 | 28 | 28 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 25 | 26 | 26 | 26 |
30 | 32 | 31 | 31 | 31 | 29 | 30 | 30 | 31 | 31 | 29 | 30 | 30 | 31 | 30 | 30 | 30 | 29 | 30 | 30 | 28 | 31 | 31 | 31 | |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SSE 6 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | S 6 | S 6 | E 8 | E 8 | E 8 | S 7 | S 7 | S 7 | S 7 | S 6 | E 8 | E 8 | S 6 | S 7 | S 7 | S 7 | S 7 |
 kJ | 103 | 82 | 82 | 106 | 129 | 123 | 120 | 94 | 78 | 116 | 116 | 113 | 163 | 139 | 131 | 107 | 86 | 60 | 44 | 115 | 134 | 138 | 138 | 138 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | — | — | — | — | ENE 9 | ENE 9 | — | — | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | — | — | E 9 | E 9 | E 9 | E 9 | E 9 |
| kJ | 24 | 54 | 72 | — | — | — | — | 123 | 123 | — | — | 144 | 88 | 86 | 84 | 84 | 63 | — | — | 56 | 59 | 60 | 61 | 61 |
Swell 3 Height (m) Direction Period (s) | E 9 | ESE 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 26 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 6 | — | — | SSE 6 | S 6 | S 6 | S 6 | — | — | S 6 | S 6 | S 7 | — | — | — | — | — | SSE 6 | SSE 6 | — | — | — | — | — |
| kJ | 92 | — | — | 68 | 76 | 92 | 94 | — | — | 97 | 119 | 128 | — | — | — | — | — | 134 | 134 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 359 | 0 | 362 | 1249 | 1249 | 349 | 347 | 362 | 349 | 347 | 347 | 347 | 347 | 1157 | 347 | 37 | 37 | 347 | 347 | 1379 | 1249 | 37 | 37 | 37 |
Best forecast wave conditions in Hainan | ||||||||||||||||||||||||
Best forecast wave conditions in China | ||||||||||||||||||||||||
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