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Thailand surfForecast / Simeulue Island / Indonesia
12 Day Weather and Surf, issued 6 am Tuesday 18 Nov 2025 WIB
Best Forecast Surf Conditions for Thailand this week:
The surf forecast for Thailand over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Nov 19) at 10AM. The primary swell is predicted to be 0.8m and 13s period with a secondary swell of 1.0m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Thailand in the next 12 days are 1.1m 13s and forecast to arrive on Saturday (Nov 22) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Monday (Nov 24) at 7AM.
| Wave Type | Time (WIB) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Wed 19th Nov) | 2.5ft (0.8m) 13s |
| Best Surf | 1PM (Sat 22nd Nov) | 3.5ft (1.1m) 13s |
| Most Powerful | 10AM (Sat 22nd Nov) | 3.5ft (1.1m) 13s |
Table - best surf conditions forecast for Thailand over the next 12 days.
Short Range Forecast Heavy rain (total 78mm), heaviest during Tue morning. Warm (max 28°C on Thu morning, min 24°C on Tue morning). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 52mm), heaviest during Fri afternoon. Warm (max 27°C on Sun morning, min 25°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 13 | 12 | 16 | 16 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 11 | 12 | 12 | 15 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 406 | 362 | 299 | 209 | 196 | 254 | 251 | 242 | 301 | 393 | 350 | 321 | 444 | 431 | 292 | 205 | 205 | 133 | 140 | 123 | 309 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross | cross- off | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross | cross- on | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross |
High Tide / height (m) | 5:19PM 0.67 | 5:26AM 0.44 | 5:48PM 0.69 | 5:58AM 0.42 | 6:18PM 0.69 | 6:29AM 0.40 | 6:48PM 0.69 | 6:58AM 0.38 | 7:19PM 0.67 | 7:28AM 0.37 | 7:52PM 0.66 | 7:59AM 0.35 | 8:26PM 0.64 | ||||||||
Low Tide / height (m) | 10:39AM 0.08 | 11:53PM 0.10 | 11:04AM 0.06 | 12:23AM 0.07 | 11:30AM 0.04 | 12:52AM 0.06 | 11:57AM 0.03 | 1:23AM 0.05 | 12:25PM 0.03 | 1:55AM 0.07 | 12:53PM 0.04 | 2:30AM 0.09 | 1:22PM 0.06 | 3:09AM 0.12 | |||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
| Sunrise | 6:18 | - | - | 6:18 | - | - | 6:18 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - |
| Sunset | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:21 | - | - | 6:21 | - |
 | |  | | | |  | | |  | | |  | | | |  |  | | |  | |
Rain (mm) | 34 | 13 | 12 | 3 | 1 | 5 | - | 1 | 9 | 7 | 12 | 14 | 5 | 4 | 6 | 2 | - | 2 | 5 | 7 | 10 |
| Temp. °C | 25 | 26 | 26 | 26 | 27 | 26 | 28 | 28 | 27 | 25 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 27 | 28 | 28 | 26 |
| Feels °C (?) | 26 | 27 | 27 | 29 | 28 | 27 | 30 | 30 | 29 | 28 | 26 | 27 | 29 | 27 | 27 | 30 | 29 | 29 | 29 | 28 | 27 |
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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 12 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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