Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 1 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
28.8° C
0.6° 

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


Dadonghai surf forecast from 11 Jul 2026:

  • Best quality surf: Sunday 12 Jul, 11PM (local time) - 3ft (0.9m), 8s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Friday 17 Jul, 11PM (local time) - 6ft (1.8m), 6s period, SSW swell with 249 kJ wave energy.
  • Next surfable swell (1★+): Sunday 12 Jul, 11PM (local time) - 3ft (0.9m), 8s 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 12) at 11PM. The primary swell is predicted to be 0.9m 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 6s and forecast to arrive on Friday (Jul 17) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 7s period and expected on Sunday (Jul 19) at 8AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sun 12th Jul)3ft (0.9m) 8s
Best Surf11PM (Sun 12th Jul)3ft (0.9m) 8s
Most Powerful11PM (Fri 17th Jul)6ft (1.8m) 6s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Sun afternoon. Warm (max 30°C on Tue morning, min 26°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Wed night. Warm (max 30°C on Wed morning, min 28°C on Wed morning). Winds increasing (calm on Wed night, fresh winds from the W by Fri morning).

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
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
1
0
0
0
0
1
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)
0.7
S
8
1.1
WSW
6
0.9
SSE
8
0.9
SSE
8
1.1
SSE
8
1.1
SSE
8
0.9
SSE
8
1.3
SSE
8
1.1
SSE
8
1.2
SSE
8
1.3
SSE
8
1.1
SSE
8
0.9
SSE
8
1
SSE
8
1
S
8
0.8
SSE
7
1
SSE
8
1.2
SSE
8
0.9
SSE
8
1.1
SSE
8
1
S
8
Wave Graph
Metric surfscale
Energy kJ
66
85
120
120
180
184
109
227
167
155
206
159
105
120
118
73
127
197
110
180
134
Wind (km/h)
25
W
20
W
10
WNW
20
W
20
W
10
W
25
W
15
W
5
WSW
25
WSW
15
W
15
WSW
30
W
20
W
25
WSW
35
W
25
W
25
W
30
W
30
W
25
W
Wind State
cross
cross
cross-off
cross
cross
cross
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross
cross-off
High Tide
8:46AM1.76m
9:45AM1.85m
10:43AM1.88m
11:38AM1.83m
12:31PM1.72m
3:05AM0.66m
1:20PM1.54m
3:20AM0.78m
Low Tide
4:57PM0.01m
5:52PM-0.10m
6:42PM-0.13m
7:28PM-0.11m
8:09PM-0.02m
8:42PM0.10m
5:38AM0.61m
9:08PM0.24m
thunderstorm
thunderstorm
clear
part cloud
part cloud
thunderstorm
thunderstorm
cloud
rain showers
part cloud
part cloud
rain showers
part cloud
clear
clear
part cloud
part cloud
thunderstorm
cloud
cloud
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:13
6:13
6:13
6:13
6:13
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:21
7:21
7:21
7:21
7:21
7:21
7:21
 mm
1
2
2
1
1
1
2
13
Temp °C
28
29
27
29
29
28
30
29
28
30
30
28
30
30
29
30
30
30
30
30
28
Feels °C
31
31
31
31
31
33
32
30
33
31
32
33
30
30
31
29
30
32
30
29
30
  • 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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