Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 7 pm 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
27.8°C
1.4° 

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


Dadonghai surf forecast from 2 Sep 2026:

  • Best quality surf: Wednesday 9 Sep, 8PM (local time) - 2ft (0.6m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Wednesday 9 Sep, 8PM (local time) - 2ft (0.6m), 9s period, S swell with 57 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 9 Sep, 8PM (local time) - 2ft (0.6m), 9s 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 Wednesday (Sep 09) at 8PM. The primary swell is predicted to be 0.6m and 9s 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 0.6m 9s and forecast to arrive on Wednesday (Sep 09) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 4s period and expected on Thursday (Sep 03) at 2PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Wed 9th Sep)2ft (0.6m) 9s
Best Surf 8PM (Wed 9th Sep)2ft (0.6m) 9s
Most Powerful 8PM (Wed 9th Sep)2ft (0.6m) 9s

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


Short Range Forecast

Light rain (total 3mm), mostly falling on Sat afternoon. Warm (max 31°C on Thu afternoon, min 25°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 13mm), heaviest on Sun afternoon. Warm (max 30°C on Mon afternoon, min 25°C on Sat night). Wind will be generally light.

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
S
8
0.5
S
8
0.5
S
8
0.5
S
8
0.5
S
8
0.4
SSE
8
0.4
SSE
8
0.4
SSE
8
0.4
SSE
8
0.3
SSE
7
0.4
SSE
8
0.9
W
4
0.5
S
8
0.5
S
8
0.4
SSE
7
0.4
SSE
8
0.4
SSE
7
0.4
SSE
7
0.6
S
8
Wave Graph
Metric surfscale
Energy kJ
33
29
34
31
33
20
22
22
20
10
21
25
32
30
18
22
18
15
48
Wind (km/h)
10
NW
20
WNW
20
W
5
NW
15
WNW
15
W
5
N
5
SW
5
W
5
NNE
5
SW
15
W
5
NNW
10
W
10
W
5
NNE
5
W
5
SW
5
NE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross
off
cross-on
glassy
cross-off
cross-on
cross
glassy
cross
cross
glassy
cross
glassy
cross-off
High Tide
2:07AM1.32m
3:47PM0.68m
2:48AM1.42m
3:42AM1.48m
4:52AM1.52m
6:14AM1.55m
7:34AM1.58m
Low Tide
9:50AM0.37m
6:53PM0.62m
11:32AM0.32m
1:28PM0.24m
2:55PM0.15m
3:54PM0.09m
4:38PM0.08m
clear
clear
clear
clear
clear
part cloud
clear
clear
rain showers
rain showers
clear
thunderstorm
thunderstorm
clear
thunderstorm
thunderstorm
rain showers
thunderstorm
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:28
6:28
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:54
6:54
6:53
6:52
6:52
6:51
6:51
 mm
3
1
2
4
1
3
1
1
Temp °C
27
29
31
28
29
30
27
28
28
27
28
28
27
29
30
27
29
30
27
Feels °C
29
30
32
32
30
31
30
31
31
32
32
31
32
32
32
32
33
33
31
  • 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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