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Surf Forecasts:
Dadonghai surfForecast / Hainan / China
48hr Weather and Surf, issued 7 am Monday 18 May 2026 CSTForecast update in hr min s Forecast update imminent
Dadonghai surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Dadonghai sea temperature is
29.6° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Dadonghai today?
The current surf forecast for Dadonghai at 12PM is: 1.3m 6s primary swell from a South-southeast direction (forecast issued at 07:00am May 18). An open ocean swell of 0.6m 9s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 4ft (1.2m) | 6s |
| Afternoon (18 May) | 4.5ft (1.3m) | 6s |
| Evening (18 May) | 3.5ft (1.1m) | 6s |
Table - waves today at Dadonghai. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 118mm), heaviest during Wed morning. Warm (max 29°C on Mon morning, min 25°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | S 6 | S 7 | S 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 7 | S 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | |
110 | 100 | 117 | 117 | 115 | 98 | 131 | 135 | 161 | 213 | 243 | 218 | 168 | 111 | 87 | 87 | 271 | 356 | 348 | 238 | 218 | 237 | 208 | 197 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross-on | cross-on | cross-on | cross | cross-on | on | on | cross | cross | cross-on | cross | cross-off | cross-off | cross-on | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | cross-on | |
High Tide | 10:56AM1.77m | 11:44AM1.84m | 12:36PM1.83m | |||||||||||||||||||||
Low Tide | 7:31PM-0.12m | 8:33PM-0.13m | 9:36PM-0.08m | |||||||||||||||||||||
 |  | | | |  | | | | |  | |  |  | | |  | | | | | | | | |
 | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | 6:07 |
 | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:08 | — | — | 7:08 |
3 | 2 | 2 | 1 | 1 | — | 2 | 4 | 15 | 11 | 6 | 3 | — | — | — | 2 | 7 | 11 | 28 | 10 | 1 | 1 | 2 | 2 | |
Temp °C | 26 | 27 | 29 | 29 | 28 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 25 | 26 | 27 | 27 | 27 | 27 |
30 | 31 | 32 | 31 | 32 | 31 | 31 | 31 | 31 | 31 | 29 | 30 | 30 | 31 | 30 | 30 | 30 | 31 | 28 | 31 | 32 | 32 | 32 | 32 | |
Swell 1 Height (m) Direction Period (s) | ENE 9 | SSE 6 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | S 7 | ENE 8 | SSE 7 | SSE 7 | SSE 6 | E 8 | E 8 | E 8 | S 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | E 9 |
 kJ | 29 | 100 | 55 | 82 | 82 | 101 | 99 | 99 | 101 | 99 | 243 | 94 | 168 | 111 | 87 | 64 | 46 | 45 | 348 | 238 | 218 | 237 | 208 | 43 |
Swell 2 Height (m) Direction Period (s) | ENE 9 | ENE 8 | — | — | ENE 9 | — | — | — | — | — | ENE 9 | ENE 8 | ENE 8 | E 8 | E 8 | — | — | — | E 9 | E 9 | E 9 | E 9 | E 9 | — |
| kJ | 27 | 40 | — | — | 137 | — | — | — | — | — | 99 | 94 | 72 | 68 | 66 | — | — | — | 55 | 57 | 60 | 43 | 44 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | — | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | S 6 | — | S 7 | — | — | — | SSE 6 | SSE 6 | SSE 7 | — | — | — | — | — | SSE 7 |
| kJ | 110 | — | 117 | 117 | 115 | 98 | 131 | 135 | 161 | 213 | — | 218 | — | — | — | 87 | 271 | 356 | — | — | — | — | — | 197 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 51 | 286 | 1313 | 1313 | 1245 | 267 | 264 | 264 | 264 | 264 | 51 | 1259 | 1243 | 51 | 51 | 264 | 264 | 264 | 276 | 1313 | 51 | 267 | 264 | 264 |
Best forecast wave conditions in Hainan | ||||||||||||||||||||||||
Best forecast wave conditions in China | ||||||||||||||||||||||||
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