Surf Forecast Surf Report

Dadonghai surfForecast / Hainan / China

information circle12 Day Weather and Surf, issued 7 am Tuesday 20 May 2025 CST
Forecast update in hr  min  s Forecast update imminent
Dadonghai surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Dadonghai sea temperature is
28.7° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Dadonghai this week:

The surf forecast for Dadonghai over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (May 27) at 11AM. The primary swell is predicted to be 1.5m and 8s period with a secondary swell of 1.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Dadonghai in the next 12 days are 1.5m 8s and forecast to arrive on Tuesday (May 27) at 8AM. 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 8s period and expected on Monday (May 26) at 11AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+)11AM (Tue 27th May)5ft (1.5m) 8s
Best Surf11AM (Tue 27th May)5ft (1.5m) 8s
Most Powerful 8AM (Tue 27th May)5ft (1.5m) 8s

Table - best surf conditions forecast for Dadonghai over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Saturday
31
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.6
S
0.7
SSE
0.8
SSE
0.7
S
0.6
S
0.7
SE
0.8
SSE
0.8
SSE
0.8
SE
0.8
SE
0.8
SE
0.8
SE
0.9
SE
0.8
SE
0.6
SE
0.8
SE
1.4
ESE
1.6
ESE
0.7
SSE
1.3
SSE
1.4
SSE
1.5
SSE
1.4
SSE
1
SSE
0.9
SSE
1.5
W
0.7
SSE
0.6
SSE
0.7
WSW
0.6
SSE
0.9
WSW
1.3
WSW
1.3
SW
1.4
WSW
0.7
SSE
1.2
WSW
Period(s) (?)555655555556666668998888967757566676
Wave
Graph
(?)Metric surfscale
Energy (?)17232430212233322537323800060145075228238277256133108141573724384712612013149108
Wind
(km/h)
15
SSE
15
SSE
10
SSE
15
SSE
15
SSE
10
SE
15
SSE
15
SE
10
ESE
15
SSE
15
SE
10
E
10
SE
10
SE
10
NE
20
E
25
E
10
NNE
30
ENE
30
ENE
25
E
20
ENE
15
ENE
10
NE
10
WSW
15
W
5
WNW
15
W
20
W
5
NW
15
WSW
15
WSW
10
WSW
20
WSW
20
WSW
0
NW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on
cross-
on
ononcross-
on
cross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
cross-
off
crosscrosscross-
off
cross-
off
cross-
off
crosscross-
off
cross-
off
cross-
off
cross-
on
crossglasscrosscrosscross-
off
crosscrosscross-
on
cross-
on
crossglass
High Tide
/ height (m)
3:16PM
1.40
4:25PM
1.29
8:36AM
0.83
5:50PM
1.16
8:13AM
0.95
7:26PM
1.02
8:23AM
1.12
9:05PM
0.90
8:47AM
1.32
10:46PM
0.80
9:19AM
1.52
12:47AM
0.73
9:58AM
1.69
10:42AM
1.80
11:30AM
1.84
12:21PM
1.81
1:13PM
1.72
Low Tide
/ height (m)
12:23AM
0.24
12:59AM
0.30
10:56AM
0.81
1:27AM
0.40
1:31PM
0.68
1:48AM
0.52
3:06PM
0.47
2:02AM
0.63
4:19PM
0.25
2:07AM
0.71
5:23PM
0.05
1:44AM
0.73
6:24PM
-0.08
7:23PM
-0.14
8:22PM
-0.13
9:20PM
-0.06
10:15PM
0.04
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Saturday
24
Sunday
25
Monday
26
Tuesday
27
Wednesday
28
Thursday
29
Friday
30
Saturday
31
Sunrise6:07--6:07--6:05--6:05--6:05--6:05--6:05--6:05--6:05--6:05--6:05--6:05--
Sunset-7:08--7:08--7:09--7:09--7:10--7:10--7:10--7:12--7:12--7:12--7:13--7:13-
part cloudclearthunderstorm clearclearrain showersthunderstorm clearthunderstorm thunderstorm clearthunderstorm part cloudthunderstorm thunderstorm clearclearthunderstorm rain showersthunderstorm thunderstorm thunderstorm thunderstorm mod rainthunderstorm thunderstorm thunderstorm clearthunderstorm rain showersclearpart cloudrain showerspart cloudclearpart cloud
Rain (mm)
--2--21-31-1-32--3152617107157-11--2---
Temp. °C303028303128313128313128303128313127292727262726292927313128303129313129
Feels °C (?)333232333433343433353433333432323129292828293129333232333232323334333235

Short Range Forecast: Light rain (total 8mm), mostly falling on Tue night. Warm (max 31°C on Wed afternoon, min 28°C on Tue morning). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Sat afternoon. Warm (max 31°C on Fri morning, min 26°C on Sat night). Wind will be generally light.

Days 6-9 Weather Summary Heavy rain (total 79mm), heaviest during Tue morning. Warm (max 29°C on Mon morning, min 25°C on Tue morning). Winds decreasing (fresh winds from the ENE on Mon night, calm by Wed morning).

Long Range Forecast: Light rain (total 4mm), mostly falling on Thu afternoon. Warm (max 31°C on Thu morning, min 27°C on Thu morning). Wind will be generally light.

  • 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 12 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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