Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 7 am 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
27.8°C
1.1° 

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


Dadonghai surf forecast from 13 Sep 2026:

  • Most powerful swell: Monday 14 Sep, 5AM (local time) - 7.5ft (2.3m), 7s period, SE swell with 558 kJ wave energy.

Best Forecast Surf Conditions for Dadonghai this week:

The most powerful waves expected at Dadonghai in the next 16 days are 2.3m 7s and forecast to arrive on Monday (Sep 14) 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 1.8m 7s period and expected on Sunday (Sep 13) at 5PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 5AM (Mon 14th Sep)7.5ft (2.3m) 7s

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


Short Range Forecast

Heavy rain (total 187mm), heaviest during Mon morning. Warm (max 26°C on Sun morning, min 23°C on Tue afternoon). Winds decreasing (fresh winds from the SE on Sun night, calm by Tue night).

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Fri afternoon. Warm (max 29°C on Thu afternoon, min 25°C on Wed morning). Wind will be generally light.

Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
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
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)
1.7
E
8
1.8
SE
7
2.3
SE
7
2
SSE
7
1.3
SSE
7
1.3
SSE
7
0.8
S
6
0.7
S
6
0.5
S
5
0.3
SSE
4
0.4
SSE
4
0.4
S
4
0.2
S
4
0.5
E
3
0.8
ENE
8
1.2
ENE
8
1.2
ENE
8
1.2
E
8
0.9
ENE
7
1
E
8
0.1
S
7
Wave Graph
Metric surfscale
Energy kJ
0
0
537
417
154
152
46
31
13
4
6
6
1
5
0
0
0
0
0
0
1
Wind (km/h)
20
ESE
20
ESE
20
ESE
15
ESE
20
SE
5
E
15
ESE
10
ENE
5
NNE
5
S
5
SSW
10
NE
15
E
15
E
10
NE
5
E
15
ENE
10
NE
15
ENE
20
E
10
NE
Wind State
cross
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-off
glassy
glassy
on
cross-off
cross
cross
cross-off
cross
cross-off
cross-off
cross-off
cross
cross-off
High Tide
12:19PM1.19m
00:24AM1.13m
1:07PM1.02m
00:49AM1.25m
1:57PM0.85m
1:17AM1.33m
2:55PM0.72m
1:48AM1.37m
2:24AM1.37m
3:09AM1.35m
4:08AM1.32m
Low Tide
6:26PM0.52m
6:51AM0.38m
6:29PM0.60m
7:51AM0.36m
6:26PM0.64m
8:54AM0.36m
6:14PM0.64m
10:04AM0.37m
11:34AM0.38m
1:22PM0.37m
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
light rain
light rain
part cloud
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
clear
clear
thunderstorm
thunderstorm
part cloud
clear
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:28
6:28
6:28
6:30
6:30
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
6:44
6:43
6:42
6:40
 mm
13
20
48
46
38
13
4
5
1
1
1
3
1
1
Temp °C
26
25
25
24
25
25
24
24
24
27
28
26
28
29
26
29
29
26
29
30
27
Feels °C
29
27
26
25
27
29
27
27
27
31
31
30
30
31
30
33
32
29
32
32
30
  • 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
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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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