Dadonghai Surf Break

Lat Long: 18.22° N 109.52° E

Dadonghai Surf Forecast and Surf Report

Issued: 1 pm 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
27.8°C
1.2° 

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


Dadonghai surf forecast from 11 Sep 2026:

  • Best quality surf: Sunday 13 Sep, 11PM (local time) - 11ft (3.5m), 8s period, SE swell with cross-shore winds.
  • Most powerful swell: Monday 14 Sep, 2AM (local time) - 11ft (3.5m), 9s period, SE swell with 1,789 kJ wave energy.
  • Next surfable swell (1★+): Sunday 13 Sep, 11PM (local time) - 11ft (3.5m), 8s period with SE 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 (Sep 13) at 11PM. The primary swell is predicted to be 3.5m and 8s period. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Dadonghai in the next 16 days are 3.5m 9s and forecast to arrive on Monday (Sep 14) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 10s period and expected on Saturday (Sep 12) at 8PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sun 13th Sep)11ft (3.5m) 8s
Best Surf11PM (Sun 13th Sep)11ft (3.5m) 8s
Most Powerful 2AM (Mon 14th Sep)11ft (3.5m) 9s

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


Short Range Forecast

Heavy rain (total 163mm), heaviest during Sun afternoon. Warm (max 31°C on Fri afternoon, min 24°C on Fri night). Winds increasing (light winds from the NNE on Sat night, fresh winds from the ESE by Mon morning).

Days 5-7 Weather Summary

Heavy rain (total 32mm), heaviest during Mon afternoon. Warm (max 29°C on Thu morning, min 24°C on Mon night). Wind will be generally light.

Fri
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
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
1
1
1
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)
0.1
S
7
0.1
S
8
2.5
ENE
9
2.5
ENE
10
2.2
ENE
10
2.4
ESE
9
2.3
SE
8
3.5
SE
9
3
SSE
8
2
SSE
8
1.7
SSE
7
1.2
SSE
7
0.9
SSE
6
0.7
SSE
6
0.5
SE
5
0.3
S
5
0.2
S
5
0.6
ENE
8
0.8
ENE
8
0.7
ENE
8
Wave Graph
Metric surfscale
Energy kJ
1
1
0
0
0
0
598
1789
1276
511
302
135
62
27
13
5
2
0
0
0
Wind (km/h)
20
NE
20
NNE
20
NE
20
NNE
10
NNE
30
ESE
25
ESE
30
ESE
30
SE
20
ESE
10
E
10
ENE
10
ENE
10
NE
5
ESE
5
E
5
NE
5
E
15
ENE
10
NE
Wind State
cross-off
off
cross-off
off
off
cross
cross
cross
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross
glassy
cross-off
cross
cross-off
cross-off
High Tide
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
2:24AM1.37m
Low Tide
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
10:04AM0.37m
thunderstorm
mod rain
heavy rain
rain showers
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
clear
<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>
6:47
6:46
6:45
6:45
6:45
6:44
6:43
 mm
1
8
15
2
19
21
35
30
32
15
16
1
2
Temp °C
31
26
26
29
25
26
26
26
25
25
25
26
27
26
28
28
26
29
29
26
Feels °C
31
27
26
30
26
28
26
26
24
26
27
29
29
29
32
32
30
33
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
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