Khao Lak / Nang Thong surf break

Khao Lak / Nang Thong surfForecast / Andaman Sea / Thailand

information circle12 Day Weather and Surf, issued 12 pm Tuesday 16 Dec 2025 +07
Forecast update in hr  min  s Forecast update imminent
Khao Lak / Nang Thong surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Khao Lak / Nang Thong sea temperature is
28.6° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Khao Lak / Nang Thong this week:

The surf forecast for Khao Lak / Nang Thong over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Dec 17) at 10AM. The primary swell is predicted to be 0.2m and 17s period with a secondary swell of 0.2m and 13s. Another secondary swell of 0.2m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Khao Lak / Nang Thong in the next 12 days are 0.4m 15s and forecast to arrive on Thursday (Dec 18) at 4PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Sunday (Dec 21) at 10PM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)10AM (Wed 17th Dec)0.5ft (0.2m) 17s
Best Surf10AM (Wed 17th Dec)0.5ft (0.2m) 17s
Most Powerful 4PM (Thu 18th Dec)1.5ft (0.4m) 15s

Table - best surf conditions forecast for Khao Lak / Nang Thong over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 30°C on Tue morning, min 24°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 29°C on Sun morning, min 24°C on Fri night). Wind will be generally light.

Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
1
0
1
1
0
1
1
0
0
1
0
0
1
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.3
SW
0.3
SW
0.2
WSW
0.2
WSW
0.3
SW
0.3
SW
0.4
SW
0.4
SW
0.4
SW
0.4
SW
0.4
SW
0.3
SW
0.3
SW
0.3
SW
0.3
SW
0.3
SW
0.3
SW
0.1
SW
0.2
WSW
0.3
SW
0.2
WSW
Period(s) (?)8814171616151514141413131313161616151515
Wave
Graph
(?)Metric surfscale
Energy kJ (?)10918284141577873727128272725414110213321
Wind
(km/h)
5
ENE
5
NW
10
ENE
5
NNE
10
WNW
5
ESE
0
ENE
10
W
5
E
5
ENE
5
WNW
5
ESE
0
N
10
NW
10
E
5
NE
10
NW
5
E
5
NNE
10
WNW
5
ESE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
on
offcross-
off
onoffglassonoffglasscross-
on
offglasscross-
on
offglasscross-
on
offglasscross-
on
cross-
off
High Tide
/ height (m)
8:06PM
2.06
8:28AM
1.77
8:46PM
2.16
9:09AM
1.85
9:23PM
2.25
9:46AM
1.91
9:58PM
2.33
10:21AM
1.96
10:33PM
2.38
10:55AM
2.00
11:06PM
2.41
11:29AM
2.02
11:39PM
2.42
Low Tide
/ height (m)
1:54PM
0.70
2:47AM
0.63
2:36PM
0.62
3:24AM
0.51
3:13PM
0.53
3:58AM
0.40
3:48PM
0.46
4:30AM
0.33
4:21PM
0.40
5:03AM
0.28
4:54PM
0.37
5:35AM
0.26
5:27PM
0.37
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Sunrise6:33--6:33--6:33--6:35--6:35--6:35--6:35--
Sunset-6:09--6:10--6:10--6:12--6:12--6:13--6:13-
part cloud
thunderstorm
clear
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
Rain (mm)
-2-------------------
Temp. °C302925292826282725282725282725292725292725
Feels °C (?)323228303130293028283028283028302927292927
  • 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 Khao Lak / Nang Thong Surf forecast

The above surf forecast table for Khao Lak / Nang Thong provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Khao Lak / Nang Thong can be found by selecting the local surf guide option on the grey menu. Our Khao Lak / Nang Thong 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 (Khao Lak / Nang Thong) 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 Khao Lak / Nang Thong 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.

Khao Lak / Nang Thong is 81 km (50 miles) from Kathu. If you plan a holiday in Andaman Sea, look for hotels and other accommodation in Kathu. Kathu has rooms for a wide range of budgets as well as car hire and transport links.

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