Dadonghai Surf Break

Dadonghai Surf Forecast and Surf Report

Lat Long: 18.22° N 109.52° E

Issued: 1 pm 28 Jun 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
30.2° C

Slightly warmer than usual

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


Dadonghai surf forecast from 28 Jun 2026:

  • Best quality surf: Monday 29 Jun, 2AM (local time) - 2.5ft (0.7m), 7s period, SSE swell with glassy winds.
  • Most powerful swell: Sunday 5 Jul, 11AM (local time) - 5ft (1.6m), 6s period, WSW swell with 170 kJ wave energy.
  • Next surfable swell (1★+): Monday 29 Jun, 2AM (local time) - 2.5ft (0.7m), 7s 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 Monday (Jun 29) at 2AM. The primary swell is predicted to be 0.7m and 7s period with a secondary swell of 0.5m and 3s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Dadonghai in the next 16 days are 1.6m 6s and forecast to arrive on Sunday (Jul 05) at 11AM. 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 6s period and expected on Sunday (Jul 05) at 2PM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Mon 29th Jun)2.5ft (0.7m) 7s
Best Surf 2AM (Mon 29th Jun)2.5ft (0.7m) 7s
Most Powerful11AM (Sun 5th Jul)5ft (1.6m) 6s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Moderate rain (total 15mm), heaviest on Sun night. Warm (max 32°C on Sun afternoon, min 27°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 18mm), heaviest on Wed night. Warm (max 31°C on Wed afternoon, min 26°C on Wed night). Wind will be generally light.

Sun
28
Monday
29
Tuesday
30
Wednesday
1
Thursday
2
Friday
3
Saturday
4
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
1
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
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
S
7
0.7
SSE
7
0.7
SSE
5
0.6
SSE
5
1
SSE
5
0.9
SSE
6
0.8
SSE
6
1.3
SSE
6
1.2
SSE
6
0.9
SSE
6
0.6
SSE
6
0.5
S
6
0.4
SSE
6
0.6
SE
5
0.3
S
8
0.5
SSE
6
0.5
S
6
0.3
S
8
0.4
SSE
7
0.9
W
4
1.6
WSW
6
Wave Graph
Metric surfscale
Energy kJ
44
55
30
20
46
64
41
98
103
56
25
17
10
19
12
23
18
11
15
30
170
Wind (km/h)
10
SW
0
NE
10
SE
15
SE
5
E
10
SSE
15
SE
10
ESE
10
SE
15
SE
10
ENE
15
ESE
15
E
10
E
15
E
15
E
10
ENE
10
S
10
SSE
5
NW
10
SW
Wind State
cross-on
glassy
cross-on
cross-on
glassy
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
cross
cross
cross
cross
cross
cross-off
on
on
glassy
cross-on
High Tide
9:42AM1.53m
10:24AM1.57m
11:06AM1.58m
11:46AM1.58m
12:25PM1.54m
1:01PM1.48m
4:52AM0.71m
1:37PM1.38m
Low Tide
5:58PM0.15m
6:36PM0.12m
7:14PM0.10m
7:50PM0.11m
8:24PM0.14m
8:54PM0.17m
9:18PM0.22m
5:17AM0.71m
part cloud
rain showers
thunderstorm
part cloud
rain showers
thunderstorm
part cloud
thunderstorm
clear
thunderstorm
thunderstorm
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:21
7:21
7:21
7:21
7:21
7:22
7:22
7:22
 mm
4
1
2
3
5
2
2
1
3
3
1
2
1
3
2
4
Temp °C
32
30
31
32
29
31
31
29
31
31
28
31
31
28
30
30
28
30
30
28
30
Feels °C
34
35
34
34
34
35
34
33
35
34
32
34
34
32
33
32
32
34
33
33
34
Swell 1
Height (m)
Direction
Period (s)
0.7
S
7
0.7
SSE
7
0.7
SSE
5
0.2
E
10
0.2
E
10
0.9
SSE
6
0.2
E
9
0.1
E
8
1.2
SSE
6
0.9
SSE
6
0.6
SSE
6
0.5
S
6
0.4
SSE
6
0.2
S
9
0.3
S
8
0.5
SSE
6
0.5
S
6
0.5
E
7
0.4
ENE
7
0.5
E
8
0.7
E
8
Energy kJ
44
55
30
8
8
64
6
1
103
56
25
17
10
6
12
23
18
28
16
34
58
Swell 2
Height (m)
Direction
Period (s)
0.1
E
14
0.1
E
12
0.2
E
11
0.2
E
9
0.1
E
7
0.1
E
7
0.1
E
8
0.1
E
8
0.2
E
8
0.4
SE
4
0.2
S
9
0.2
E
8
0.2
S
8
0.2
E
8
0.4
SSE
5
0.4
SSE
7
0.4
SSE
6
0.4
SSE
8
Energy kJ
4
3
9
6
1
1
1
1
5
4
6
5
6
5
9
15
13
23
Swell 3
Height (m)
Direction
Period (s)
0.1
E
9
0.1
E
9
0.2
W
3
0.1
E
8
0.1
E
7
0.1
E
8
0.1
E
8
0.2
E
8
0.3
E
5
0.1
E
6
0.1
S
9
0.3
S
8
0.2
S
7
0.2
S
10
Energy kJ
2
2
1
1
1
1
1
5
4
1
2
11
4
7
Wind waves
Height (m)
Direction
Period (s)
0.5
SW
3
0.6
SSE
5
1
SSE
5
0.8
SSE
6
1.3
SSE
6
0.5
E
3
0.4
ESE
5
0.6
SE
5
0.7
SE
7
0.6
E
6
0.5
E
6
0.4
W
3
0.9
W
4
1.6
WSW
6
Energy kJ
5
20
46
41
98
5
7
19
44
30
18
2
30
170
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
2
2
1
2
Distance (km)
1243
14
1862
1150
14
1308
1460
1308
1308
1351
1155
821
1313
1308
1152
1351
14
1152
1150
14
1150
Best forecast wave conditions in Hainan
Rating
(10 max)
1
1
1
1
Best forecast wave conditions in China
Rating
(10 max)
1
1
1
1
Header Global
Rating
(10 max)
5
5
6
7
5
5
5
5
5
5
4
5
9
6
5
5
8
5
4
5
5
  • 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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