Dadonghai Surf Break

Dadonghai Surf Forecast and Surf Report

Lat Long: 18.22° N 109.52° E

Issued: 1 am 17 Jun 2026 (local time)

Forecast update in  hr  min

Today's Dadonghai sea temperature is
29.8° C

Normal for this time of year

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


Dadonghai surf forecast from 17 Jun 2026:

  • Best quality surf: Thursday 18 Jun, 2PM (local time) - 5ft (1.5m), 7s period, SSE swell with glassy winds.
  • Most powerful swell: Thursday 18 Jun, 11PM (local time) - 5ft (1.6m), 7s period, SSE swell with 273 kJ wave energy.
  • Next surfable swell (1★+): Thursday 18 Jun, 2PM (local time) - 5ft (1.5m), 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 Thursday (Jun 18) at 2PM. The primary swell is predicted to be 1.5m and 7s 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 1.6m 7s and forecast to arrive on Thursday (Jun 18) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 9s period and expected on Wednesday (Jun 17) at 11AM.

Wave TypeTime (CST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Thu 18th Jun)5ft (1.5m) 7s
Best Surf 2PM (Thu 18th Jun)5ft (1.5m) 7s
Most Powerful11PM (Thu 18th Jun)5ft (1.6m) 7s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 38mm), heaviest during Thu night. Warm (max 31°C on Wed morning, min 27°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 24mm), heaviest during Sat morning. Warm (max 31°C on Sat morning, min 28°C on Sat night). Wind will be generally light.

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
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)
0.9
SSE
6
0.9
SSE
7
1.7
SSE
6
1.5
SSE
7
1.5
SSE
7
1.5
SSE
7
1.6
SSE
7
1.5
SSE
7
1.5
SSE
7
1.7
SSE
6
1.5
SSE
7
1.4
SSE
6
1.4
SSE
7
1.3
SSE
7
1.4
SSE
6
1.2
SSE
6
1.1
SSE
6
1.1
SSE
6
1.2
SSE
6
1.1
SSE
6
1.2
SSE
6
Wave Graph
Metric surfscale
Energy kJ
64
77
205
189
229
229
254
231
195
233
187
161
163
141
131
112
95
86
112
95
97
Wind (km/h)
10
SW
10
S
10
SSE
10
SSE
10
SE
5
SSE
15
SSE
10
SSE
10
SSE
15
S
15
SSE
10
SSE
15
SSE
15
SSE
10
SSE
15
SSE
15
S
10
SSE
15
S
15
S
10
SSE
Wind State
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
on
on
cross-on
on
on
on
on
on
on
on
High Tide
11:39AM1.89m
12:34PM1.83m
1:28PM1.70m
2:21PM1.51m
5:38AM0.75m
3:14PM1.28m
5:50AM0.89m
4:10PM1.05m
6:15AM1.03m
5:21PM0.84m
Low Tide
8:31PM-0.13m
9:20PM-0.04m
10:03PM0.09m
10:37PM0.22m
7:46AM0.73m
11:01PM0.36m
10:09AM0.76m
11:14PM0.47m
12:35PM0.70m
11:17PM0.55m
part cloud
cloud
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
thunderstorm
thunderstorm
thunderstorm
rain showers
thunderstorm
clear
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:05
6:05
6:05
6:05
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:19
7:19
7:19
7:20
7:20
7:20
7:20
 mm
7
5
2
10
5
2
7
5
1
8
1
2
3
1
3
1
1
Temp °C
31
31
29
28
29
28
29
30
28
31
31
28
30
30
28
30
30
28
31
31
28
Feels °C
35
35
33
31
35
33
33
34
33
34
34
33
33
33
33
34
33
33
34
34
33
Swell 1
Height (m)
Direction
Period (s)
0.9
SSE
6
0.9
SSE
7
0.1
E
11
0.1
E
10
0.1
E
10
0.1
E
10
1.6
SSE
7
1.5
SSE
7
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
1.1
SSE
6
Energy kJ
64
77
2
2
2
2
254
231
2
2
2
2
2
2
2
2
2
2
2
95
Swell 2
Height (m)
Direction
Period (s)
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
0.1
E
9
Energy kJ
2
2
2
2
2
2
Swell 3
Height (m)
Direction
Period (s)
Energy kJ
Wind waves
Height (m)
Direction
Period (s)
0.3
WSW
4
1.7
SSE
6
1.5
SSE
7
1.5
SSE
7
1.5
SSE
7
1.5
SSE
7
1.7
SSE
6
1.5
SSE
7
1.4
SSE
6
1.4
SSE
7
1.3
SSE
7
1.4
SSE
6
1.2
SSE
6
1.1
SSE
6
1.1
SSE
6
1.2
SSE
6
1.2
SSE
6
Energy kJ
3
205
189
229
229
195
233
187
161
163
141
131
112
95
86
112
97
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
1478
1152
1243
1478
281
1478
281
286
822
274
286
1310
281
1313
1308
267
1310
1270
267
1270
1270
Best forecast wave conditions in Hainan
Rating
(10 max)
Best forecast wave conditions in China
Rating
(10 max)
1
2
Header Global
Rating
(10 max)
4
5
5
4
5
6
6
6
4
4
7
7
4
9
9
7
6
5
7
5
9
  • 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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