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Surf Forecasts:
Dadonghai surfForecast / Hainan / China
48hr Weather and Surf, issued 7 am Thursday 18 Sep 2025 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
29.0° C
(Which is normal for this time of year)| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | - | - |
| Afternoon (18 Sep) | 0.5ft (0.1m) | 6s |
| Evening (18 Sep) | 0.5ft (0.1m) | 7s |
Table - waves today at Dadonghai. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | Sun 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 | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 7 | 6 | 6 | 7 | 7 | 7 | 6 | 6 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 4 | 4 | 9 | 8 | 3 | 3 | 6 | 22 | 31 | 44 | 50 | 53 | 68 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | glass | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross | cross- off | cross- off | cross- off | off | glass | glass | cross- on | glass | glass | glass | glass |
High Tide / height (m) | 7:27AM 1.48 | 8:36AM 1.45 | 11:43PM 0.72 | 9:33AM 1.42 | 11:23PM 0.78 | |||||||||||||||||||
Low Tide / height (m) | 4:26PM 0.16 | 4:57PM 0.21 | 1:54AM 0.70 | 5:21PM 0.29 | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
| Sunrise | - | 6:30 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:30 | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:42 | - | - | - | - | - | - | - | 6:40 | - | - | - | - | - | - | - | 6:39 | - | - | - |
 |  | |  |  |  | | |  |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | 1 | 1 | - | - | - | - | - | 1 | 1 | - | - | - | - | - | - | - | 2 | - | - | - |
| Temp. °C | 25 | 26 | 27 | 29 | 29 | 27 | 26 | 26 | 26 | 26 | 30 | 30 | 29 | 27 | 27 | 26 | 26 | 27 | 29 | 29 | 29 | 28 | 27 | 26 |
| Feels °C (?) | 28 | 30 | 31 | 33 | 33 | 31 | 30 | 30 | 30 | 30 | 34 | 33 | 32 | 31 | 31 | 30 | 30 | 32 | 33 | 33 | 34 | 33 | 32 | 31 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Hainan
Continuing clean conditions at Dadonghai (light winds from the ESE at Danxian 143 km from Dadonghai). 0.2m 6s windswell from the SSE to make surfable waves.
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