Dadonghai surfForecast / Hainan / China

information circle16 Day Weather and Surf, issued 1 am 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
28.7° C
(Which is normal for this time of year)

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 Friday (May 15) at 8AM. The primary swell is predicted to be 1.0m and 5s 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 1.9m 7s and forecast to arrive on Thursday (May 21) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 7s period and expected on Thursday (May 21) at 11AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Fri 15th May)3.5ft (1.0m) 5s
Best Surf 8AM (Fri 15th May)3.5ft (1.0m) 5s
Most Powerful 8AM (Thu 21st May)6ft (1.9m) 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 31mm), heaviest during Sat morning. Warm (max 32°C on Fri morning, min 26°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 105mm), heaviest during Tue morning. Warm (max 29°C on Wed afternoon, min 26°C on Mon afternoon). Wind will be generally light.

Friday
15
Saturday
16
Sunday
17
Monday
18
Tuesday
19
Wednesday
20
Thursday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
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
Wave
Height (m)
Direction
Period (s)
1.1
SSE
6
1
S
6
1.4
SSE
6
1.3
SSE
6
1.8
SSE
7
1.4
SSE
7
1.4
SSE
6
1.4
SSE
6
1.4
SSE
6
1.3
SSE
6
1.4
SSE
6
1.4
SSE
6
1.6
SSE
7
1.3
SSE
7
1.2
SSE
6
1.6
SSE
7
1.5
SSE
7
1.7
SSE
7
1.5
S
7
1.7
SSE
7
1.4
SSE
7
Wave Graph
Metric surfscale
Energy kJ
80
66
114
106
289
180
135
142
165
121
146
141
223
161
103
220
181
240
243
270
166
Wind (km/h)
15
S
15
S
5
SE
15
SSE
15
SSE
5
ESE
10
SSE
15
SSE
10
ESE
20
SE
15
ESE
10
ESE
20
SSE
10
SSE
10
ESE
15
SSE
15
SE
15
SE
15
SE
15
ESE
15
SE
on
on
cross-on
on
on
cross
cross-on
on
cross
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
9:09AM1.28m
10:56PM0.84m
9:37AM1.47m
00:31AM0.77m
10:13AM1.64m
10:56AM1.77m
11:44AM1.84m
12:36PM1.83m
1:32PM1.75m
Low Tide
4:31PM0.28m
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
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
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
6:07
<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
1
5
7
7
1
4
1
5
7
7
18
17
13
13
15
8
7
4
2
1
Temp °C
32
32
29
28
28
27
30
30
27
27
26
26
27
27
27
28
29
27
29
29
27
34
35
34
33
31
32
33
32
31
31
29
30
29
31
30
32
33
31
33
32
31
Swell 1
Height (m)
Direction
Period (s)
0.3
ENE
10
1
S
6
0.3
ENE
10
0.3
E
10
0.3
E
10
1.4
SSE
7
1.4
SSE
6
0.2
E
10
1.4
SSE
6
0.7
ENE
9
1
E
9
0.9
ENE
9
0.9
ENE
9
1.3
SSE
7
0.8
ENE
8
0.7
ENE
8
1.5
SSE
7
0.6
E
9
1.5
S
7
0.5
E
9
0.4
ENE
9
Energy kJ
18
66
19
17
17
180
135
7
165
77
173
135
132
161
94
75
181
57
243
40
25
Swell 2
Height (m)
Direction
Period (s)
0.3
ENE
10
0.3
E
10
0.3
ENE
10
0.2
E
6
0.5
ENE
9
0.9
ENE
9
0.7
ENE
9
0.5
E
9
Energy kJ
19
17
18
3
48
126
80
40
Swell 3
Height (m)
Direction
Period (s)
0.2
WSW
4
0.2
E
7
0.1
NE
8
Energy kJ
2
3
3
Wind waves
Height (m)
Direction
Period (s)
1.1
SSE
6
1.4
SSE
6
1.3
SSE
6
1.8
SSE
7
1.4
SSE
6
1.3
SSE
6
1.4
SSE
6
1.4
SSE
6
1.6
SSE
7
1.2
SSE
6
1.6
SSE
7
1.7
SSE
7
1.2
SE
7
1.7
SSE
7
1.4
SSE
7
Energy kJ
80
114
106
289
142
121
146
141
223
103
220
240
152
270
166
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
1
2
3
1
1
Distance (km)
1313
1313
1308
1313
1313
51
1313
1862
1148
281
264
1152
276
264
1270
264
1259
1270
264
1243
1243
Best forecast wave conditions in Hainan
Rating
(10 max)
2
Best forecast wave conditions in China
Rating
(10 max)
2
1
1
Header Global
Rating
(10 max)
5
5
5
5
4
5
5
4
4
6
4
6
4
4
6
4
5
5
5
4
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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