Surf Forecasts:
Thailand surf forecast from 17 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 4PM (local time) - 10ft (3.0m), 18s period, SSW swell with cross-onshore winds.
- Most powerful swell: Wednesday 19 Aug, 10PM (local time) - 10ft (3.0m), 18s period, SSW swell with 5,242 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 4AM (local time) - 3.5ft (1.0m), 21s period with SW swell.
Best Forecast Surf Conditions for Thailand this week:
The surf forecast for Thailand over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 4AM. The primary swell is predicted to be 1.0m and 21s period with a secondary swell of 0.9m and 18s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Thailand in the next 16 days are 3.0m 18s and forecast to arrive on Wednesday (Aug 19) at 10PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 18th Aug) | 3.5ft (1.0m) 21s |
| Best Surf | 4PM (Wed 19th Aug) | 10ft (3.0m) 18s |
| Most Powerful | 10PM (Wed 19th Aug) | 10ft (3.0m) 18s |
Table - best surf conditions forecast for Thailand over the next 16 days.
Short Range ForecastHeavy rain (total 31mm), heaviest during Wed night. Warm (max 29°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Sun morning. Warm (max 28°C on Thu afternoon, min 26°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 14 | SSW 19 | SSW 18 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 305 | 687 | 1205 | 2568 | 2600 | 4323 | 4777 | 5123 | 4105 | 3543 | 2682 | 2172 | 1835 | 1557 | 2503 | 2441 | 1714 | 1321 | 1090 | 867 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | cross-on | glassy | cross-on | cross-on | cross-off | cross-on | glassy | glassy | glassy | cross-on | cross | cross-on | cross | cross | cross-on | cross-on |
High Tide | 9:23PM0.61m | 9:15AM0.51m | 10:01PM0.58m | 9:39AM0.43m | 10:44PM0.53m | 9:57AM0.35m | 11:43PM0.48m | 9:50AM0.29m | 1:17AM0.46m | 3:07AM0.47m | 3:59PM0.25m | |||||||||
Low Tide | 3:19AM0.15m | 3:15PM0.07m | 4:01AM0.20m | 3:37PM0.09m | 4:53AM0.25m | 4:02PM0.12m | 6:47AM0.28m | 4:34PM0.15m | 5:45PM0.19m | 11:27AM0.19m | 8:30PM0.19m | |||||||||
 |  | | |  |  |  | |  | |  | | | | | |  | | | | |
 | — | — | 6:33 | — | — | 6:33 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — |
 | 6:44 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:42 | — |
mm | — | 1 | — | — | 7 | — | 2 | 20 | 1 | — | — | 1 | 1 | 2 | 1 | — | — | 10 | 3 | 1 |
Temp °C | 28 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 |
Feels °C | 31 | 32 | 34 | 32 | 32 | 32 | 31 | 30 | 31 | 32 | 31 | 32 | 32 | 31 | 31 | 31 | 31 | 29 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SSW 19 | SSW 18 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 |
| kJ | 305 | 687 | 1205 | 2568 | 2600 | 4323 | 4777 | 5123 | 4105 | 3543 | 2682 | 2172 | 1835 | 1557 | 2503 | 2441 | 1714 | 1321 | 1090 | 867 |
Swell 2 Height (m) Direction Period (s) | S 10 | S 11 | SSW 21 | W 8 | SSW 16 | W 7 | W 8 | W 8 | WNW 7 | W 9 | W 8 | WNW 8 | SSW 20 | SSW 18 | W 9 | W 8 | W 8 | W 8 | S 21 | SSW 20 |
| kJ | 117 | 149 | 799 | 45 | 1507 | 28 | 31 | 29 | 17 | 39 | 31 | 35 | 634 | 1093 | 39 | 34 | 31 | 32 | 233 | 507 |
Swell 3 Height (m) Direction Period (s) | W 8 | SW 13 | SW 13 | SW 22 | W 8 | SSE 8 | WSW 20 | W 10 | W 10 | WSW 18 | SW 7 | S 21 | W 8 | W 8 | — | S 26 | SSW 24 | S 22 | W 8 | WNW 8 |
| kJ | 48 | 215 | 257 | 19 | 29 | 23 | 37 | 7 | 16 | 30 | 12 | 141 | 50 | 33 | — | 13 | 54 | 236 | 33 | 21 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 4 | S 5 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 25 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 14 | 94 | 0 | 118 | 94 | 0 | 118 | 118 | 1 | 14 | 0 | 0 | 0 | 14 | 14 | 14 | 14 | 14 | 14 | 118 |
Best forecast wave conditions in Simeulue Island | ||||||||||||||||||||
Best forecast wave conditions in Indonesia | ||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Thailand 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 Thailand Surf forecast
The above surf forecast table for Thailand provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Thailand can be found by selecting the local surf guide option on the grey menu. Our Thailand 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 (Thailand) 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 Thailand 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 Simeulue Island? If you are looking for accommodation near Thailand, camping, hotels and holiday cottages in Simeulue Island, consider staying in Batoe Nasera which is 84 km (52 miles) away.
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