Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 1 pm 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
28.5°C
0.9° 

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


Dadonghai surf forecast from 23 Aug 2026:

  • Best quality surf: Monday 24 Aug, 8PM (local time) - 3.5ft (1.1m), 8s period, SSE swell with glassy winds.
  • Most powerful swell: Wednesday 26 Aug, 11PM (local time) - 4ft (1.2m), 9s period, SSE swell with 222 kJ wave energy.
  • Next surfable swell (1★+): Monday 24 Aug, 8PM (local time) - 3.5ft (1.1m), 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 Monday (Aug 24) at 8PM. The primary swell is predicted to be 1.1m and 8s 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 1.2m 9s and forecast to arrive on Wednesday (Aug 26) 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 2.1m 7s period and expected on Tuesday (Aug 25) at 5AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Mon 24th Aug)3.5ft (1.1m) 8s
Best Surf 8PM (Mon 24th Aug)3.5ft (1.1m) 8s
Most Powerful11PM (Wed 26th Aug)4ft (1.2m) 9s

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


Short Range Forecast

Heavy rain (total 31mm), heaviest during Tue night. Warm (max 30°C on Mon afternoon, min 27°C on Sun night). Winds increasing (calm on Mon night, fresh winds from the WSW by Tue morning).

Days 5-7 Weather Summary

Moderate rain (total 10mm), heaviest on Wed afternoon. Warm (max 30°C on Fri afternoon, min 27°C on Wed night). Mainly fresh winds.

Sun
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
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
1
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)
0.9
SSE
8
1.6
WSW
6
1
SSE
8
1
SSE
8
1
S
8
0.9
SSE
8
1
SSE
8
1.1
SSE
8
1.3
SSE
8
1.1
SSE
8
1.2
SSE
8
1
SSE
8
1
SSE
8
1
S
8
0.8
SSE
8
0.9
SSE
8
0.9
SSE
8
0.7
SSE
8
1
SSE
9
0.9
SSE
8
Wave Graph
Metric surfscale
Energy kJ
102
159
133
123
134
104
130
171
206
167
212
133
127
127
81
125
112
73
181
115
Wind (km/h)
20
W
25
WSW
25
WSW
15
W
30
WSW
30
WSW
20
W
20
WSW
25
WSW
25
W
15
W
30
W
20
W
15
W
25
W
25
W
20
WNW
25
W
15
W
20
W
Wind State
cross
cross-on
cross
cross
cross-on
cross-on
cross
cross-on
cross
cross
cross
cross
cross
cross-off
cross
cross-off
cross-off
cross
cross-off
cross
High Tide
7:22AM1.38m
8:23AM1.43m
9:14AM1.47m
10:00AM1.49m
00:35AM0.68m
10:42AM1.48m
00:29AM0.74m
11:23AM1.42m
00:36AM0.83m
Low Tide
4:16PM0.28m
4:52PM0.23m
5:22PM0.20m
5:48PM0.19m
6:11PM0.21m
2:59AM0.65m
6:30PM0.26m
4:13AM0.61m
6:46PM0.32m
thunderstorm
rain showers
thunderstorm
thunderstorm
rain showers
rain showers
rain showers
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:24
6:26
6:26
6:26
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:02
7:01
7:01
7:00
7:00
6:59
6:59
 mm
1
5
4
1
4
4
3
5
4
3
2
2
1
1
1
1
Temp °C
29
28
28
30
28
28
29
28
28
28
27
29
29
27
29
30
28
28
28
27
Feels °C
30
32
30
33
33
28
31
29
30
30
30
30
30
31
30
31
31
31
31
31
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Dadonghai:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Dadonghai surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest