Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 7 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
27.9° C
1.6° 

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


Dadonghai surf forecast from 15 Aug 2026:

  • Best quality surf: Sunday 16 Aug, 2AM (local time) - 3.5ft (1.0m), 8s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Saturday 22 Aug, 8PM (local time) - 3.5ft (1.0m), 9s period, S swell with 162 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 2AM (local time) - 3.5ft (1.0m), 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 (Aug 16) at 2AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.5m and 5s. 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 1.0m 9s and forecast to arrive on Saturday (Aug 22) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Sunday (Aug 16) at 2PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Sun 16th Aug)3.5ft (1.0m) 8s
Best Surf 2AM (Sun 16th Aug)3.5ft (1.0m) 8s
Most Powerful 8PM (Sat 22nd Aug)3.5ft (1.0m) 9s

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


Short Range Forecast

Light rain (total 6mm), mostly falling on Mon night. Warm (max 31°C on Mon afternoon, min 27°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 72mm), heaviest during Wed night. Warm (max 29°C on Wed morning, min 25°C on Wed night). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
0
1
0
0
1
0
0
1
0
1
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)
1
SSE
8
1.3
WSW
6
0.9
SSE
8
1.6
WSW
6
1.3
WSW
6
0.7
SSE
7
0.8
SSE
8
0.9
WSW
6
0.9
WSW
6
0.7
S
8
0.9
WSW
6
1.2
WSW
6
0.6
S
8
0.5
S
8
1.3
WSW
5
1.1
WSW
6
1.2
WSW
6
0.6
S
10
0.9
SSE
8
Wave Graph
Metric surfscale
Energy kJ
130
109
107
154
106
55
85
50
55
68
53
84
49
30
88
77
94
69
115
Wind (km/h)
10
WNW
20
W
15
W
10
WNW
25
W
15
W
10
WNW
20
W
15
W
5
ENE
15
W
15
WNW
0
NNW
10
WNW
15
W
20
W
25
W
20
WSW
20
W
Wind State
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross
cross-off
cross
cross-off
glassy
cross-off
cross
cross
cross
cross
cross
High Tide
1:33AM0.86m
1:09PM1.29m
1:57AM1.00m
1:54PM1.08m
2:24AM1.13m
2:41PM0.87m
2:56AM1.23m
3:36PM0.70m
3:32AM1.29m
4:15AM1.32m
Low Tide
6:29AM0.53m
7:55PM0.43m
7:42AM0.52m
7:59PM0.52m
8:58AM0.52m
7:55PM0.57m
10:26AM0.51m
7:39PM0.59m
12:17PM0.48m
2:19PM0.41m
part cloud
thunderstorm
part cloud
clear
part cloud
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
thunderstorm
thunderstorm
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:24
6:24
6:24
6:24
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:08
7:07
7:07
7:07
7:06
7:05
7:05
 mm
1
3
2
8
2
12
25
2
4
19
Temp °C
28
29
30
28
30
31
29
31
31
28
29
29
27
26
29
27
29
29
27
Feels °C
33
32
31
33
32
34
34
33
34
33
32
32
32
30
32
30
30
30
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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