Surf Forecasts:
Khao Lak / Nang Thong surf forecast from 31 Jul 2026:
- Best quality surf: Tuesday 4 Aug, 4PM (local time) - 7ft (2.1m), 8s period, WSW swell with cross-onshore winds.
- Most powerful swell: Thursday 6 Aug, 1AM (local time) - 10ft (3.0m), 9s period, WSW swell with 1,342 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 1PM (local time) - 3.5ft (1.0m), 8s period with W 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 Friday (Jul 31) at 1PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.4m and 18s. 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 3.0m 9s and forecast to arrive on Thursday (Aug 06) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Fri 31st Jul) | 3.5ft (1.0m) 8s |
| Best Surf | 4PM (Tue 4th Aug) | 7ft (2.1m) 8s |
| Most Powerful | 1AM (Thu 6th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Khao Lak / Nang Thong over the next 16 days.
Short Range ForecastLight rain (total 4mm), mostly falling on Fri afternoon. Warm (max 29°C on Sun morning, min 26°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 68mm), heaviest during Wed night. Warm (max 29°C on Mon morning, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | |||||||||||||||
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) | W 8 | W 8 | W 9 | W 8 | W 8 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | WSW 8 | WSW 8 | WSW 9 | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 133 | 133 | 120 | 93 | 91 | 125 | 78 | 78 | 76 | 54 | 54 | 54 | 445 | 555 | 576 | 696 | 982 | 1342 | 885 | 907 | 755 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | glassy | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 11:15AM2.51m | 11:38PM2.25m | 11:44AM2.52m | 00:09AM2.31m | 12:14PM2.49m | 00:40AM2.33m | 12:45PM2.40m | 1:15AM2.31m | 1:20PM2.26m | 1:54AM2.23m | 2:00PM2.07m | 2:41AM2.12m | 2:52PM1.86m | 3:46AM1.99m | |||||||
Low Tide | 5:39PM0.13m | 5:39AM0.27m | 6:06PM0.11m | 6:11AM0.28m | 6:35PM0.12m | 6:45AM0.32m | 7:06PM0.17m | 7:22AM0.41m | 7:39PM0.27m | 8:04AM0.53m | 8:18PM0.40m | 8:56AM0.68m | 9:08PM0.57m | ||||||||
 |  |  |  | |  |  | |  | | | | | | | | | | | | | |
 | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:47 | — | — | 6:47 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:46 | — | — | 6:46 | — |
mm | — | 3 | — | — | — | — | — | — | 1 | — | — | 4 | — | 4 | 7 | 10 | 9 | 34 | 13 | 12 | 18 |
Temp °C | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 27 | 28 |
Feels °C | 32 | 31 | 32 | 33 | 31 | 31 | 33 | 32 | 31 | 32 | 32 | 31 | 32 | 31 | 30 | 29 | 28 | 29 | 29 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 9 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | SW 14 | WSW 8 | SW 12 | WSW 9 | WSW 16 | WSW 16 | SW 16 | SW 15 | SW 15 | SW 18 |
| kJ | 133 | 133 | 120 | 84 | 82 | 61 | 63 | 42 | 28 | 26 | 27 | 54 | 445 | 66 | 576 | 26 | 26 | 40 | 36 | 36 | 48 |
Swell 2 Height (m) Direction Period (s) | SW 18 | SW 18 | SW 18 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | WSW 11 | WSW 18 | WSW 18 | SW 16 | — | — | SW 21 | SW 20 | WSW 19 | SW 14 |
| kJ | 50 | 80 | 79 | 93 | 91 | 125 | 78 | 78 | 76 | 54 | 54 | 24 | 31 | 30 | 42 | — | — | 17 | 15 | 36 | 8 |
Swell 3 Height (m) Direction Period (s) | WSW 14 | WSW 13 | WSW 13 | SW 13 | SW 13 | NNW 5 | — | — | NW 6 | SW 19 | SW 19 | SW 18 | — | — | — | — | — | — | — | — | — |
| kJ | 18 | 17 | 17 | 7 | 6 | 2 | — | — | 1 | 15 | 14 | 12 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | W 6 | — | WSW 8 | — | WSW 8 | WSW 8 | WSW 9 | WSW 9 | WSW 8 | WSW 9 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 42 | — | 555 | — | 696 | 982 | 1342 | 885 | 907 | 755 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 73 | 0 | 0 | 73 | 0 | 0 | 73 | 0 | 93 | 674 | 73 | 73 | 73 | 73 | 73 | 73 | 750 | 142 | 142 | 730 |
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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