Dadonghai Surf Break

Dadonghai Surf Forecast and Surf Report

Lat Long: 18.22° N 109.52° E

Issued: 7 pm 02 Jul 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
30.5° C

1.2°C warmer than normal for this time of year

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


Dadonghai surf forecast from 2 Jul 2026:

  • Best quality surf: Thursday 9 Jul, 8PM (local time) - 2.5ft (0.7m), 8s period, S swell with cross-offshore winds.
  • Most powerful swell: Monday 6 Jul, 5AM (local time) - 6ft (1.8m), 7s period, S swell with 338 kJ wave energy.
  • Next surfable swell (1★+): Thursday 9 Jul, 8PM (local time) - 2.5ft (0.7m), 8s period with S 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 Thursday (Jul 09) at 8PM. The primary swell is predicted to be 0.7m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Dadonghai in the next 16 days are 1.8m 7s and forecast to arrive on Monday (Jul 06) at 5AM. Winds are predicted to be cross-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 Wednesday (Jul 08) at 11AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Thu 9th Jul)2.5ft (0.7m) 8s
Best Surf 8PM (Thu 9th Jul)2.5ft (0.7m) 8s
Most Powerful 5AM (Mon 6th Jul)6ft (1.8m) 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 115mm), heaviest during Sat afternoon. Warm (max 32°C on Fri morning, min 26°C on Thu night). Winds increasing (light winds from the ESE on Fri morning, fresh winds from the SW by Sun morning).

Days 5-7 Weather Summary

Heavy rain (total 50mm), heaviest during Sun night. Warm (max 29°C on Mon morning, min 26°C on Sun night). Winds increasing (light winds from the SSW on Mon night, fresh winds from the W by Wed afternoon).

Friday
3
Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thu
9
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
S
8
0.3
S
8
0.3
SSE
8
0.9
SSE
8
1.5
SSE
8
1.4
SSE
8
1.4
SSE
8
1.5
SSE
8
1.4
SSE
8
1.4
SSE
8
1.3
S
7
1
SSE
7
1.1
SSE
7
1.2
SSE
7
1
SSE
7
1
SSE
8
0.7
S
7
0.7
S
7
0.7
S
8
0.6
S
7
0.6
S
7
Wave Graph
Metric surfscale
Energy kJ
5
12
14
107
321
264
270
267
268
221
166
96
115
128
108
123
45
48
60
36
36
Wind (km/h)
15
NE
5
ESE
10
WNW
15
W
25
WSW
30
WSW
20
SSW
30
SW
20
WSW
10
SW
20
SW
10
WSW
20
SW
25
WSW
25
WSW
25
WSW
30
W
25
W
25
WSW
25
W
20
W
Wind State
cross-off
cross
cross-off
cross
cross
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross
High Tide
12:25PM1.54m
1:01PM1.48m
4:52AM0.71m
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
Low Tide
8:24PM0.14m
8:54PM0.17m
9:18PM0.22m
5:17AM0.71m
9:39PM0.29m
7:12AM0.74m
9:55PM0.37m
8:56AM0.75m
10:08PM0.45m
10:53AM0.70m
10:16PM0.54m
12:58PM0.56m
thunderstorm
part cloud
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
mod rain
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:11
6:11
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:21
7:22
7:22
7:22
7:22
7:22
7:22
7:22
 mm
2
13
11
9
34
28
10
8
13
6
7
10
4
5
5
Temp °C
29
32
29
28
27
26
28
28
28
27
29
28
28
29
29
28
29
29
28
30
30
Feels °C
34
36
33
33
29
27
31
28
29
30
31
30
29
30
30
31
28
28
30
31
31
Swell 1
Height (m)
Direction
Period (s)
0.3
WNW
4
1.5
E
9
1.8
E
9
1.3
E
9
1.5
SSE
8
1.6
WSW
7
1.4
SSE
8
1.5
SSE
8
1.4
SSE
8
1.4
SSE
8
1.6
W
7
1.3
WSW
7
1.1
SSE
7
1.2
SSE
7
1
SSE
7
1
SSE
8
0.7
S
7
0.7
S
7
0.7
S
8
0.6
E
18
0.6
E
18
Energy kJ
4
332
561
258
321
206
270
267
268
221
285
186
115
128
108
123
45
48
60
246
230
Swell 2
Height (m)
Direction
Period (s)
0.2
S
8
0.3
S
8
0.3
SSE
8
0.9
SSE
8
0.4
E
8
1.4
SSE
8
0.5
W
5
0.2
E
8
0.1
E
8
0.1
E
8
1.3
S
7
1
SSE
7
0.8
WSW
6
0.1
E
9
0.1
E
9
0.1
E
9
0.2
E
16
0.2
ESE
20
0.5
E
19
0.6
S
7
0.6
S
7
Energy kJ
5
12
14
99
18
264
13
5
1
1
166
96
50
2
2
2
21
41
192
36
36
Swell 3
Height (m)
Direction
Period (s)
0.5
E
11
0.3
ENE
7
0.3
E
7
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
16
0.1
E
9
0.2
E
16
0.1
E
9
0.1
E
9
Energy kJ
57
10
9
1
2
2
2
2
5
2
19
2
2
Wind waves
Height (m)
Direction
Period (s)
1.3
ENE
8
0.5
W
3
1.4
WSW
5
2.4
WSW
7
1.1
W
5
1.5
WSW
6
1
WSW
5
1.6
W
7
1.9
WSW
8
1.8
WSW
6
3
WSW
8
2.5
WSW
8
2.5
WSW
8
3
WSW
8
2.1
WSW
8
Energy kJ
206
4
107
543
66
172
49
247
397
245
1066
824
887
1123
501
Nearest Offshore or Glassy
Rating
(10 max)
1
1
3
2
2
1
1
1
1
2
1
1
1
3
4
2
1
2
3
1
1
Distance (km)
1017
1152
14
264
264
264
286
1313
1308
1161
1259
1308
1161
1308
1259
710
1017
1017
930
267
264
Best forecast wave conditions in Hainan
Rating
(10 max)
3
Best forecast wave conditions in China
Rating
(10 max)
1
3
1
2
1
2
3
Header Global
Rating
(10 max)
5
9
5
9
5
7
5
5
9
7
7
6
9
8
6
6
7
9
7
7
9
  • 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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