Dadonghai surfForecast / Hainan / China

information circle16 Day Weather and Surf, issued 7 pm Friday 15 May 2026 CST
Forecast 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
29.1° C
(Which is slightly warmer than usual)

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 Saturday (May 16) at 2AM. The primary swell is predicted to be 1.0m 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 2.1m 7s and forecast to arrive on Thursday (May 21) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 9s period and expected on Monday (May 18) at 11PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sat 16th May)3.5ft (1.0m) 6s
Best Surf 2AM (Sat 16th May)3.5ft (1.0m) 6s
Most Powerful11AM (Thu 21st May)7ft (2.1m) 7s

Table - best surf conditions forecast for Dadonghai over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 22mm), heaviest during Fri night. Warm (max 31°C on Sat afternoon, min 26°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 78mm), heaviest during Tue afternoon. Warm (max 28°C on Tue afternoon, min 25°C on Mon night). Wind will be generally light.

Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
Fri
22
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSE
6
1
S
6
1
S
6
1.4
SE
6
1.3
SSE
6
1.4
SSE
6
1.4
SE
6
1.4
SSE
6
1.3
SSE
7
1.3
SSE
6
1.2
SSE
6
1
SSE
6
1.1
SSE
6
1.7
SSE
7
1.6
SSE
7
1.5
SSE
7
2.1
SSE
7
1.9
SSE
7
1.5
SSE
7
1.6
SSE
7
1.5
SSE
7
Wave Graph
Metric surfscale
Energy kJ
65
64
69
157
118
139
152
144
157
126
110
82
90
277
236
198
456
365
210
237
200
Wind (km/h)
5
N
5
E
15
SE
10
E
10
SE
15
SE
10
ESE
15
SE
10
E
10
E
15
SE
10
ESE
10
E
20
SE
20
SE
15
SE
20
SE
15
SE
15
SE
20
SSE
15
SSE
glassy
glassy
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
10:56PM0.84m
9:37AM1.47m
00:31AM0.77m
10:13AM1.64m
10:56AM1.77m
11:44AM1.84m
12:36PM1.83m
1:32PM1.75m
2:30PM1.62m
Low Tide
2:41AM0.71m
5:31PM0.09m
2:38AM0.74m
6:31PM-0.05m
7:31PM-0.12m
8:33PM-0.13m
9:36PM-0.08m
10:37PM0.01m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:07
6:07
6:07
6:07
6:07
6:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:07
7:07
7:07
7:07
7:08
7:08
7:08
7:09
3
2
1
2
2
6
4
2
5
6
8
8
8
11
18
8
6
7
4
2
Temp °C
29
28
31
27
31
30
27
27
26
26
27
28
26
28
28
27
28
28
27
28
29
34
34
34
30
34
32
31
31
29
30
30
32
29
30
30
31
31
31
31
32
32
Swell 1
Height (m)
Direction
Period (s)
0.3
ENE
10
1
S
6
1
S
6
0.3
E
10
0.3
E
10
0.3
ENE
9
0.4
ENE
9
0.6
ENE
8
0.8
ENE
9
0.9
ENE
9
0.9
ENE
9
0.9
ENE
9
0.8
ENE
8
0.7
ENE
8
0.6
E
8
0.6
E
9
0.5
E
9
0.4
ENE
9
0.4
ENE
9
0.4
ENE
9
1.5
SSE
7
Energy kJ
19
64
69
17
16
17
31
53
113
138
135
126
92
72
45
59
43
29
28
27
200
Swell 2
Height (m)
Direction
Period (s)
0.3
ENE
10
0.3
ENE
10
0.3
ENE
10
0.2
E
7
0.3
E
5
0.9
ENE
8
0.7
ENE
8
0.4
ENE
9
Energy kJ
19
19
18
4
4
115
63
28
Swell 3
Height (m)
Direction
Period (s)
0.2
WSW
4
0.2
E
6
Energy kJ
1
3
Wind waves
Height (m)
Direction
Period (s)
1
SSE
6
1.4
SE
6
1.3
SSE
6
1.4
SSE
6
1.4
SE
6
1.4
SSE
6
1.3
SSE
7
1.3
SSE
6
1.2
SSE
6
1
SSE
6
1.1
SSE
6
1.7
SSE
7
1.6
SSE
7
1.5
SSE
7
2.1
SSE
7
1.9
SSE
7
1.5
SSE
7
1.6
SSE
7
Energy kJ
65
157
118
139
152
144
157
126
110
82
90
277
236
198
456
365
210
237
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
2
1
1
2
1
Distance (km)
14
14
1313
51
286
286
1148
264
264
51
276
264
1270
267
267
1270
264
1313
1308
267
264
Best forecast wave conditions in Hainan
Rating
(10 max)
1
1
1
2
Best forecast wave conditions in China
Rating
(10 max)
1
1
1
2
Header Global
Rating
(10 max)
6
5
4
6
4
5
7
4
6
4
4
4
4
4
4
6
5
4
7
5
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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