Dadonghai Surf Break

Dadonghai Surf Forecast and Surf Report

Lat Long: 18.22° N 109.52° E

Issued: 1 am 05 Jul 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
30.1° C

Slightly warmer than usual

Dadonghai surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Dadonghai surf forecast from 4 Jul 2026:

  • Best quality surf: Tuesday 7 Jul, 11PM (local time) - 3ft (0.9m), 7s period, SSE swell with glassy winds.
  • Most powerful swell: Sunday 5 Jul, 5AM (local time) - 6ft (1.9m), 8s period, SSE swell with 411 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 7 Jul, 11PM (local time) - 3ft (0.9m), 7s 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 Tuesday (Jul 07) at 11PM. The primary swell is predicted to be 0.9m and 7s 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 8s and forecast to arrive on Sunday (Jul 05) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Saturday (Jul 11) at 11PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Tue 7th Jul)3ft (0.9m) 7s
Best Surf11PM (Tue 7th Jul)3ft (0.9m) 7s
Most Powerful 5AM (Sun 5th Jul)6ft (1.9m) 8s

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 56mm), heaviest during Sun morning. Warm (max 28°C on Sun morning, min 26°C on Mon afternoon). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 11mm), heaviest on Wed morning. Warm (max 30°C on Fri morning, min 27°C on Wed morning). Wind will be generally light.

Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
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
Wave
Height (m)
Direction
Period (s)
1.9
SSE
8
1.7
SSE
8
1.3
SSE
7
1.1
SSE
6
1.1
SSE
6
1.2
SSE
6
0.9
SSE
6
1
SSE
7
0.9
SSE
6
0.8
SSE
7
0.8
SSE
7
0.7
S
7
0.6
S
7
0.6
S
7
0.5
S
7
0.4
S
6
0.5
S
8
0.6
S
9
0.5
S
9
0.5
S
9
0.6
S
9
Wave Graph
Metric surfscale
Energy kJ
400
335
177
93
108
123
53
85
60
60
67
43
33
38
24
13
33
56
38
38
54
Wind (km/h)
10
W
10
WSW
10
SW
25
WSW
5
SSW
15
SW
10
SW
15
WSW
5
W
25
WSW
25
WSW
25
WSW
25
WSW
25
W
20
WSW
25
W
20
WNW
25
W
35
W
30
W
35
W
Wind State
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross-off
cross
cross
cross
cross
High Tide
1:37PM1.38m
4:33AM0.78m
2:16PM1.25m
4:44AM0.88m
3:03PM1.08m
5:03AM1.01m
4:09PM0.89m
5:31AM1.16m
6:00PM0.71m
6:08AM1.32m
6:54AM1.48m
Low Tide
9:39PM0.29m
7:12AM0.74m
9:55PM0.37m
8:56AM0.75m
10:08PM0.45m
10:53AM0.70m
10:16PM0.54m
12:58PM0.56m
10:12PM0.60m
2:41PM0.37m
3:56PM0.17m
mod rain
thunderstorm
thunderstorm
thunderstorm
mod rain
rain showers
thunderstorm
thunderstorm
rain showers
rain showers
thunderstorm
rain showers
thunderstorm
thunderstorm
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:11
6:11
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:22
7:22
7:22
7:22
7:22
7:22
7:21
 mm
7
5
11
3
7
8
7
4
4
2
2
4
2
1
Temp °C
28
28
28
28
27
27
28
28
27
28
29
27
28
28
28
30
30
29
30
30
29
Feels °C
32
31
31
28
28
30
32
31
31
28
29
27
29
29
31
31
31
33
30
30
31
Swell 1
Height (m)
Direction
Period (s)
1.9
SSE
8
1.7
SSE
8
1.3
SSE
7
1.1
SSE
6
1.1
SSE
6
1.2
SSE
6
1.2
WSW
7
1
SSE
7
1.2
WSW
7
0.8
SSE
7
0.8
SSE
7
0.7
S
7
0.6
S
7
0.6
E
19
0.7
ESE
18
0.9
ESE
18
1.8
WSW
7
1.1
E
17
1.3
E
17
1.3
E
16
1.1
E
16
Energy kJ
400
335
177
93
108
123
135
85
139
60
67
43
33
254
344
516
353
692
935
875
577
Swell 2
Height (m)
Direction
Period (s)
0.5
W
6
0.7
W
6
0.2
E
8
0.2
E
9
0.2
E
9
1.1
W
7
0.2
E
9
0.2
E
9
0.9
SSE
6
0.2
E
9
0.2
E
15
0.2
E
14
0.5
E
19
0.6
S
7
0.5
S
7
0.4
S
6
1
E
18
0.6
S
9
0.5
S
9
0.5
S
9
0.6
S
9
Energy kJ
19
39
5
6
6
113
6
6
60
6
17
15
190
38
24
13
639
56
38
38
54
Swell 3
Height (m)
Direction
Period (s)
0.2
E
8
0.2
E
8
0.3
E
6
0.2
E
9
0.2
E
9
0.2
E
9
0.1
E
15
0.1
E
9
0.2
ESE
21
0.1
E
9
0.1
E
12
0.2
E
11
0.4
S
6
0.5
S
8
Energy kJ
5
5
6
7
6
6
4
2
44
2
3
9
12
33
Wind waves
Height (m)
Direction
Period (s)
1
WSW
6
1.4
WSW
6
1.1
WSW
6
0.9
SSE
6
1.1
WSW
7
1.4
WSW
6
1.8
WSW
7
1.7
WSW
6
2
WSW
7
1.7
WSW
7
2
WSW
7
2
WSW
7
2.3
WSW
7
2.5
WSW
8
2.4
WSW
8
3
WSW
8
Energy kJ
80
151
101
53
114
153
306
242
342
285
342
417
487
728
689
1068
Nearest Offshore or Glassy
Rating
(10 max)
3
1
1
1
1
1
1
3
1
5
6
3
3
1
2
1
3
2
2
3
3
Distance (km)
14
281
662
1152
1152
1150
1152
1243
822
1243
1243
930
665
286
87
264
87
264
264
264
267
Best forecast wave conditions in Hainan
Rating
(10 max)
3
2
3
Best forecast wave conditions in China
Rating
(10 max)
3
1
3
3
2
4
3
3
1
Header Global
Rating
(10 max)
5
9
7
5
5
8
7
5
5
9
8
9
9
6
6
5
5
4
6
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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