Surf Forecasts:
Khao Lak / Nang Thong surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10AM (local time) - 7.5ft (2.3m), 8s period, WSW swell with cross-onshore winds.
- Most powerful swell: Saturday 19 Sep, 7AM (local time) - 15ft (4.5m), 10s period, WSW swell with 3,663 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 7PM (local time) - 2ft (0.6m), 16s period with SW swell.
Best Forecast Surf Conditions for Khao Lak / Nang Thong this week:
The surf forecast for Khao Lak / Nang Thong over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 7PM. The primary swell is predicted to be 0.6m and 16s period with a secondary swell of 0.8m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Khao Lak / Nang Thong in the next 16 days are 4.5m 10s and forecast to arrive on Saturday (Sep 19) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 5s period and expected on Monday (Sep 21) at 1PM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Tue 15th Sep) | 2ft (0.6m) 16s |
| Best Surf | 10AM (Thu 17th Sep) | 7.5ft (2.3m) 8s |
| Most Powerful | 7AM (Sat 19th Sep) | 15ft (4.5m) 10s |
Table - best surf conditions forecast for Khao Lak / Nang Thong over the next 16 days.
Short Range ForecastHeavy rain (total 161mm), heaviest during Wed afternoon. Warm (max 29°C on Tue morning, min 25°C on Wed afternoon). Winds increasing (calm on Wed night, fresh winds from the W by Thu night). | Days 4-6 Weather SummaryHeavy rain (total 79mm), heaviest during Fri morning. Warm (max 30°C on Sun morning, min 26°C on Fri morning). Winds decreasing (fresh winds from the SW on Fri night, calm by Sun night). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 14 | W 7 | WSW 7 | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 201 | 155 | 106 | 74 | 422 | 292 | 591 | 713 | 488 | 1958 | 3188 | 2345 | 2864 | 1996 | 1046 | 617 | 432 | 239 | 208 | 182 | 127 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross-on | cross-on | on | cross-on | on | cross-on | on | cross-on | on | cross-on | cross-on | cross | cross-off | cross | glassy | glassy | on | glassy |
High Tide | 12:12PM2.26m | 00:29AM2.36m | 12:40PM2.06m | 00:57AM2.18m | 1:07PM1.84m | 1:28AM1.98m | 1:37PM1.62m | 2:08AM1.77m | 2:22PM1.41m | 3:35AM1.59m | 5:23PM1.29m | 6:14AM1.60m | 7:29PM1.46m | ||||||||
Low Tide | 6:20PM0.26m | 6:45AM0.38m | 6:43PM0.42m | 7:14AM0.55m | 7:07PM0.59m | 7:46AM0.75m | 7:33PM0.78m | 8:32AM0.96m | 8:11PM0.97m | 10:46AM1.11m | 10:20PM1.14m | 1:45PM0.95m | 1:29AM1.01m | ||||||||
 |  |  | | |  | | | | | | |  | |  | | |  |  | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:27 | — | — | 6:27 | — | — | 6:25 | — | — | 6:24 | — | — | 6:24 | — | — | 6:23 | — | — | 6:23 | — |
mm | 2 | — | 1 | 5 | 34 | 54 | 22 | 21 | 22 | 22 | 14 | 16 | 9 | 11 | 6 | — | 1 | — | — | — | 1 |
Temp °C | 29 | 28 | 27 | 28 | 25 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 30 | 29 | 26 | 29 | 29 | 27 |
Feels °C | 32 | 31 | 32 | 32 | 27 | 29 | 29 | 28 | 29 | 26 | 27 | 26 | 27 | 28 | 28 | 32 | 31 | 30 | 32 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | WSW 6 | W 6 | SW 14 | WSW 7 | SW 14 | SW 18 | SW 18 | — | — | — | — | SW 19 | SW 14 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 |
| kJ | 201 | 155 | 45 | 50 | 74 | 292 | 48 | 51 | 49 | — | — | — | — | 14 | 33 | 617 | 432 | 239 | 208 | 182 | 127 |
Swell 2 Height (m) Direction Period (s) | WSW 4 | W 9 | SW 15 | SW 14 | W 21 | SW 14 | SW 19 | SW 14 | SW 14 | — | — | — | — | SW 19 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 15 |
| kJ | 11 | 2 | 106 | 74 | 9 | 53 | 15 | 7 | 30 | — | — | — | — | 14 | 50 | 148 | 140 | 125 | 124 | 119 | 75 |
Swell 3 Height (m) Direction Period (s) | W 10 | W 9 | W 8 | WSW 8 | — | SW 11 | — | — | — | — | — | — | — | — | — | — | — | S 5 | S 5 | — | S 5 |
| kJ | 2 | 2 | 1 | 6 | — | 5 | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | 2 |
Wind waves Height (m) Direction Period (s) | — | WSW 5 | — | — | W 7 | — | WSW 8 | WSW 8 | WSW 8 | WSW 9 | WSW 10 | WSW 10 | WSW 10 | WSW 10 | WSW 9 | — | — | — | — | S 5 | — |
| kJ | — | 26 | — | — | 422 | — | 591 | 713 | 488 | 1958 | 3188 | 2345 | 2864 | 1996 | 1046 | — | — | — | — | 2 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 93 | 0 | 93 | 93 | 93 | 73 | 730 | 724 | 730 | 893 | 724 | 142 | 142 | 11 | 11 | 62 | 0 | 0 | 68 | 0 |
Best forecast wave conditions in Andaman Sea | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Khao Lak / Nang Thong surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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 16 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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