Nai Harn Beach Surf Break

Lat Long: 7.78° N 98.30° E

Nai Harn Beach 48 hour detailed Surf Forecast

Issued: 12 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nai Harn Beach sea temperature is
29.7° C
0.6° 

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


How big are the waves at Nai Harn Beach today (18 Aug):

  • Morning surf: Morning surf (18 Aug, local time) - 3.5ft (1.0m), 8s period with W swell.
  • Afternoon surf: Afternoon surf (18 Aug, local time) - 0.5ft (0.2m), 21s period with WSW swell.
  • Evening surf: Evening surf (18 Aug, local time) - 0.5ft (0.2m), 22s period with WSW swell.

The current surf forecast for Nai Harn Beach at 6PM is: 0.2m 21s primary swell from a West-southwest direction and 0.1m 14s secondary swell from a Southwest direction (forecast issued at 12:00pm August 18). An open ocean swell of 1.0m 7s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (+07) & DateWave HeightWave Period
Morning (18 Aug)3.5ft (1.0m)8s
Afternoon (18 Aug)0.5ft (0.2m)21s
Evening (18 Aug)0.5ft (0.2m)22s

Table - waves today at Nai Harn Beach. (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 6mm), mostly falling on Tue morning. Warm (max 29°C on Tue morning, min 28°C on Tue morning). Mainly fresh winds.

Tue
18
Wednesday
19
Thursday
20
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
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
Height Map
Wave
Height (m)
Direction
Period (s)
1
W
8
0.1
SW
22
0.2
WSW
21
0.2
WSW
22
1
W
6
1
W
6
1.1
W
6
1.2
W
6
1.4
W
6
1.6
W
6
1.6
W
6
1.6
W
7
1.6
W
7
1.8
W
7
2
W
7
2
W
7
1.9
W
7
1.8
W
7
1.8
W
8
1.7
W
8
0.3
WSW
18
Wave Graph
Metric surfscale
Energy kJ
113
18
45
45
67
67
80
91
130
193
206
219
232
302
373
408
389
349
358
327
61
Wind (km/h)
20
W
25
WNW
25
WNW
25
WNW
25
W
25
W
25
W
30
WNW
30
W
30
W
30
W
30
W
35
W
35
W
35
W
35
W
30
W
30
W
30
W
30
W
25
WSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
1:36PM1.58m
2:04AM1.62m
2:05PM1.41m
2:39AM1.50m
2:39PM1.24m
Low Tide
7:38AM0.38m
7:44PM0.32m
8:14AM0.52m
8:12PM0.47m
8:56AM0.66m
8:43PM0.62m
thunderstorm
part cloud
part cloud
part cloud
part cloud
thunderstorm
thunderstorm
clear
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:40
6:40
6:39
 mm
1
1
1
1
1
1
Temp °C
28
29
29
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
Feels °C
29
30
30
29
29
29
29
28
27
27
27
27
27
27
27
27
27
28
27
28
29
  • 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 

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