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Dadonghai surfForecast / Hainan / China
12 Day Weather and Surf, issued 1 pm Thursday 18 Sep 2025 CST
Best Forecast Surf Conditions for Dadonghai this week:
The most powerful waves expected at Dadonghai in the next 12 days are 0.6m 8s and forecast to arrive on Sunday (Sep 21) at 5AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 7s period and expected on Thursday (Sep 25) at 8PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 21st Sep) | 2ft (0.6m) 8s |
Table - best surf conditions forecast for Dadonghai over the next 12 days.
Short Range Forecast Moderate rain (total 16mm), heaviest on Thu afternoon. Warm (max 30°C on Fri morning, min 25°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 33mm), heaviest during Mon night. Warm (max 30°C on Mon afternoon, min 25°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 7 | 6 | 8 | 7 | 6 | 6 | 8 | 8 | 7 | 7 | 6 | 5 | 6 | 5 | 13 | 7 | 6 | 16 | 16 | 9 | 9 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 1 | 2 | 1 | 4 | 3 | 3 | 20 | 34 | 30 | 18 | 7 | 7 | 6 | 3 | 0 | 8 | 2 | 0 | 0 | 6 | 6 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- off | cross | cross | glass | cross- on | cross- on | glass | glass | glass | cross- off | cross | cross- off | off | cross | cross | cross- off | cross- off | cross- off | cross- off | cross | ||
High Tide / height (m) | 8:36AM 1.45 | 11:43PM 0.72 | 9:33AM 1.42 | 11:23PM 0.78 | 10:23AM 1.35 | 11:26PM 0.87 | 11:09AM 1.26 | 11:38PM 0.98 | 11:53AM 1.15 | 11:54PM 1.10 | 12:38PM 1.02 | 12:13AM 1.20 | 1:24PM 0.90 | ||||||||||
Low Tide / height (m) | 4:26PM 0.16 | 4:57PM 0.21 | 1:54AM 0.70 | 5:21PM 0.29 | 3:27AM 0.62 | 5:38PM 0.37 | 4:32AM 0.54 | 5:50PM 0.47 | 5:27AM 0.47 | 5:57PM 0.55 | 6:19AM 0.40 | 6:01PM 0.62 | 7:09AM 0.36 | ||||||||||
Thu 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||||
| Sunrise | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:31 | - | - | 6:31 | ||
| Sunset | 6:42 | - | - | 6:40 | - | - | 6:39 | - | - | 6:38 | - | - | 6:37 | - | - | 6:37 | - | - | 6:37 | - | - | ||
 |  |  | |  |  | | | | | | | | | | | | | |  | | |||
Rain (mm) | 8 | 1 | - | 2 | - | - | 1 | 4 | - | 6 | 4 | 2 | 7 | 8 | 1 | 3 | 2 | - | - | 13 | 17 | ||
| Temp. °C | 29 | 27 | 30 | 30 | 27 | 29 | 30 | 27 | 29 | 29 | 27 | 29 | 30 | 27 | 29 | 29 | 27 | 29 | 29 | 26 | 25 | ||
| Feels °C (?) | 34 | 31 | 34 | 34 | 31 | 33 | 34 | 32 | 34 | 34 | 32 | 33 | 34 | 31 | 33 | 32 | 32 | 30 | 29 | 26 | 23 | ||
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Recent Eyeball Surf Reports for Hainan
Continuing clean conditions at Dadonghai (light winds from the N at DANang 269 km from Dadonghai). No surfable waves
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Dadonghai surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Dadonghai Surf forecast
The above surf forecast table for Dadonghai provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Dadonghai can be found by selecting the local surf guide option on the grey menu. Our Dadonghai 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 (Dadonghai) 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 Dadonghai 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 Dadonghai, camping, hotels and holiday cottages in Hainan, consider staying in Sanya which is 4 km (2 miles) away. Other places in and around Hainan where you can find information about places to rent, and car hire include Bacun which is 63 km (39 miles) away, Li-an, Baoding and Baisha.
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