Surf Forecasts:
Dadonghai surf forecast from 18 Jul 2026:
- Best quality surf: Sunday 19 Jul, 2AM (local time) - 3ft (0.9m), 6s period, SSE swell with glassy winds.
- Most powerful swell: Monday 20 Jul, 2AM (local time) - 3ft (0.9m), 7s period, SSE swell with 84 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 2AM (local time) - 3ft (0.9m), 6s period with SSE swell.
Best Forecast Surf Conditions for Dadonghai this week:
The surf forecast for Dadonghai over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jul 19) at 2AM. The primary swell is predicted to be 0.9m and 6s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Dadonghai in the next 16 days are 0.9m 7s and forecast to arrive on Monday (Jul 20) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Sunday (Jul 19) at 8PM.
| Wave Type | Time (CST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 19th Jul) | 3ft (0.9m) 6s |
| Best Surf | 2AM (Sun 19th Jul) | 3ft (0.9m) 6s |
| Most Powerful | 2AM (Mon 20th Jul) | 3ft (0.9m) 7s |
Table - best surf conditions forecast for Dadonghai over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Sun night. Warm (max 31°C on Sun afternoon, min 27°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Warm (max 31°C on Tue afternoon, min 26°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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) | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 7 | SSE 6 | SSE 6 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 5 | SSE 5 | SSE 5 | SSE 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 52 | 57 | 53 | 55 | 84 | 64 | 55 | 77 | 48 | 55 | 48 | 37 | 40 | 68 | 43 | 20 | 31 | 37 | 26 | 11 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross | cross-on | cross-on | cross | glassy | cross-on | cross | glassy | on | cross | cross-on | on | cross | cross-off | cross-on | cross-on | cross |
High Tide | 3:20AM0.78m | 2:07PM1.31m | 3:45AM0.92m | 2:53PM1.08m | 4:15AM1.06m | 3:42PM0.85m | 4:50AM1.18m | 4:55PM0.67m | 5:29AM1.26m | 6:11AM1.33m | ||||||||||
Low Tide | 9:08PM0.24m | 7:11AM0.64m | 9:24PM0.37m | 8:46AM0.66m | 9:31PM0.48m | 10:32AM0.65m | 9:28PM0.55m | 12:41PM0.59m | 9:07PM0.58m | 2:43PM0.47m | 3:53PM0.36m | |||||||||
 |  | | |  | | | | |  | | | | | | | | |  | | |
 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 7:21 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:19 | — | — | 7:19 | — |
mm | — | — | — | — | 1 | — | — | — | — | — | 1 | — | — | 1 | — | — | 2 | — | 2 | 2 |
Temp °C | 30 | 28 | 30 | 31 | 29 | 30 | 30 | 28 | 30 | 31 | 29 | 30 | 31 | 29 | 30 | 30 | 28 | 30 | 30 | 27 |
Feels °C | 31 | 32 | 33 | 35 | 34 | 32 | 32 | 32 | 31 | 33 | 33 | 33 | 34 | 34 | 33 | 33 | 32 | 34 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | W 5 | SSE 6 | SSE 6 | W 5 | SSE 6 | SSE 6 | W 5 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | W 5 | SSE 6 | S 7 | W 5 | E 9 | E 9 | SSE 6 |
| kJ | 52 | 4 | 53 | 55 | 4 | 64 | 55 | 4 | 48 | 55 | 48 | 37 | 40 | 2 | 43 | 4 | 4 | 2 | 2 | 11 |
Swell 2 Height (m) Direction Period (s) | WSW 5 | E 10 | WSW 5 | WSW 4 | E 10 | W 5 | WSW 4 | E 10 | WSW 5 | W 5 | W 4 | WSW 4 | WSW 4 | E 10 | E 10 | WSW 4 | E 9 | — | E 9 | E 9 |
| kJ | 8 | 2 | 7 | 7 | 2 | 12 | 7 | 2 | 8 | 11 | 4 | 4 | 3 | 2 | 2 | 1 | 2 | — | 7 | 2 |
Swell 3 Height (m) Direction Period (s) | E 10 | — | E 10 | E 10 | — | E 10 | E 10 | — | E 10 | E 10 | E 10 | S 8 | E 10 | — | E 10 | E 10 | — | — | — | — |
| kJ | 2 | — | 2 | 2 | — | 2 | 2 | — | 2 | 2 | 2 | 11 | 2 | — | 2 | 2 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSE 6 | — | — | SSE 7 | — | — | SSE 7 | — | — | — | — | — | SSE 6 | — | SSE 6 | SSE 5 | SSE 5 | SSE 5 | ESE 4 |
| kJ | — | 57 | — | — | 84 | — | — | 77 | — | — | — | — | — | 68 | — | 20 | 31 | 37 | 26 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1665 | 1161 | 1665 | 1678 | 1161 | 1612 | 1259 | 14 | 1259 | 14 | 14 | 1243 | 1152 | 14 | 1152 | 1152 | 1243 | 821 | 1243 | 1310 |
Best forecast wave conditions in Hainan | ||||||||||||||||||||
Best forecast wave conditions in China | ||||||||||||||||||||
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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 16 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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