Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 1 pm 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
27.4°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 10 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 5PM (local time) - 15ft (4.5m), 9s period, SSE swell with glassy winds.
  • Most powerful swell: Tuesday 15 Sep, 5PM (local time) - 15ft (4.5m), 9s period, SSE swell with 3,167 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 15 Sep, 5PM (local time) - 15ft (4.5m), 9s 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 Tuesday (Sep 15) at 5PM. The primary swell is predicted to be 4.5m and 9s 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 4.5m 9s and forecast to arrive on Tuesday (Sep 15) at 5PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 6.5m 10s period and expected on Wednesday (Sep 16) at 8PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Tue 15th Sep)15ft (4.5m) 9s
Best Surf 5PM (Tue 15th Sep)15ft (4.5m) 9s
Most Powerful 5PM (Tue 15th Sep)15ft (4.5m) 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 Fri afternoon, min 24°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 130mm), heaviest during Mon afternoon. Warm (max 29°C on Tue afternoon, min 25°C on Sun night). Winds decreasing (strong winds from the SSE on Mon afternoon, calm by Tue afternoon).

Thu
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
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
2
!
3
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)
0.3
S
7
0.2
S
8
0.2
S
7
0.1
S
7
0.1
S
8
0.1
S
7
2.4
ENE
9
0.1
S
8
0.1
S
11
0.2
SSE
9
0.2
SSE
8
0.6
SE
10
0.7
SSE
9
1.7
SSE
7
2.5
SSE
8
4.5
SSE
9
3
SSW
7
5.5
SW
9
6
WSW
10
5
WSW
10
Wave Graph
Metric surfscale
Energy kJ
10
4
4
1
1
1
0
1
2
8
6
89
70
310
954
3167
936
0
0
0
Wind (km/h)
20
E
10
NNE
15
ENE
20
ENE
15
NNE
25
NE
10
NE
10
N
10
NNW
20
N
15
WNW
35
SE
45
SSE
25
S
10
SW
5
WSW
10
ENE
10
E
5
E
10
NNE
Wind State
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-on
on
on
cross-on
glassy
cross-off
cross
glassy
cross-off
High Tide
11:40PM0.73m
10:40AM1.48m
11:47PM0.85m
11:31AM1.35m
00:03AM0.99m
12:19PM1.19m
00:24AM1.13m
1:07PM1.02m
00:49AM1.25m
1:57PM0.85m
1:17AM1.33m
2:55PM0.72m
1:48AM1.37m
Low Tide
5:40PM0.20m
3:30AM0.58m
6:02PM0.31m
4:45AM0.50m
6:17PM0.42m
5:50AM0.43m
6:26PM0.52m
6:51AM0.38m
6:29PM0.60m
7:51AM0.36m
6:26PM0.64m
8:54AM0.36m
6:14PM0.64m
clear
clear
clear
part cloud
part cloud
part cloud
thunderstorm
rain showers
part cloud
thunderstorm
rain showers
thunderstorm
heavy rain
thunderstorm
thunderstorm
thunderstorm
part cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:28
6:28
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:49
6:47
6:46
6:45
6:45
6:45
6:44
 mm
1
2
3
18
32
38
28
8
3
5
1
Temp °C
30
26
29
31
26
30
30
27
28
27
26
26
26
27
27
29
26
29
29
27
Feels °C
30
28
30
31
27
29
31
31
31
29
28
25
24
29
29
32
30
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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