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Similan Islands Surf Forecast
/ Andaman Sea (9 surf breaks) /
Similan Islands surfForecast / Andaman Sea / Thailand
12 Day Weather and Surf, issued 12 pm Monday 28 Apr 2025 +07
Best Forecast Surf Conditions for Similan Islands this week:
The most powerful waves expected at Similan Islands in the next 12 days are 0.5m 15s and forecast to arrive on Saturday (May 03) at 1PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Sat 3rd May) | 1.5ft (0.5m) 15s |
Table - best surf conditions forecast for Similan Islands over the next 12 days.
Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 01 | Friday 02 | Saturday 03 | Sunday 04 | Monday 05 | Tuesday 06 | Wednesday 07 | Thursday 08 | Friday 09 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | 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 | 16 | 4 | 4 | 18 | 16 | 16 | 15 | 14 | 14 | 13 | 13 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 5 | 5 | 20 | 6 | 6 | 6 | 6 | 7 | 6 | 6 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 27 | 10 | 13 | 7 | 12 | 10 | 25 | 34 | 33 | 29 | 28 | 27 | 42 | 36 | 77 | 78 | 103 | 97 | 69 | 70 | 63 | 61 | 43 | 27 | 36 | 52 | 60 | 74 | 146 | 132 | 206 | 225 | 170 | 206 | 220 | 258 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | glass | glass | cross- on | cross | glass | on | cross- on | glass | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide / height (m) | 10:40PM 2.21 | 10:59AM 2.50 | 11:22PM 2.11 | 11:38AM 2.40 | 12:04AM 1.94 | 12:19PM 2.24 | 12:48AM 1.75 | 1:02PM 2.04 | 1:39AM 1.55 | 1:54PM 1.83 | 2:49AM 1.39 | 3:04PM 1.65 | 4:33AM 1.34 | 4:41PM 1.55 | 6:15AM 1.42 | 6:11PM 1.57 | 7:17AM 1.58 | 7:14PM 1.64 | 7:56AM 1.74 | 7:59PM 1.72 | 8:28AM 1.89 | 8:35PM 1.79 | ||||||||||||||
Low Tide / height (m) | 4:42PM -0.07 | 4:47AM -0.05 | 5:23PM -0.06 | 5:25AM 0.06 | 6:05PM 0.04 | 6:03AM 0.22 | 6:49PM 0.20 | 6:43AM 0.41 | 7:38PM 0.39 | 7:28AM 0.62 | 8:40PM 0.58 | 8:27AM 0.82 | 10:08PM 0.71 | 10:13AM 0.95 | 11:52PM 0.72 | 12:16PM 0.92 | 1:00AM 0.64 | 1:25PM 0.79 | 1:44AM 0.55 | 2:10PM 0.65 | 2:18AM 0.47 | 2:46PM 0.51 | 2:47AM 0.39 | |||||||||||||
Monday 28 | Tuesday 29 | Wednesday 30 | Thursday 01 | Friday 02 | Saturday 03 | Sunday 04 | Monday 05 | Tuesday 06 | Wednesday 07 | Thursday 08 | Friday 09 | |||||||||||||||||||||||||
| Sunrise | 6:15 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - |
| Sunset | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:38 | - | - | 6:39 | - | - | 6:39 | - | - | 6:39 | - |
 | |  |  |  |  | | | | | | | | |  |  | | | | |  | | | | | | | | | |  | | | | | | |
Rain (mm) | 11 | 19 | 1 | - | 1 | 1 | - | - | 3 | - | - | 3 | - | - | - | - | - | 1 | - | - | - | 2 | 3 | 3 | 4 | 14 | 1 | 1 | 1 | 3 | 8 | 6 | 7 | 6 | 5 | 22 |
| Temp. °C | 28 | 27 | 27 | 28 | 28 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Feels °C (?) | 31 | 30 | 30 | 33 | 31 | 32 | 33 | 33 | 32 | 33 | 32 | 32 | 33 | 32 | 32 | 33 | 32 | 32 | 33 | 31 | 32 | 32 | 30 | 30 | 30 | 28 | 31 | 30 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 |
Short Range Forecast: Heavy rain (total 36mm), heaviest during Mon afternoon. Warm (max 29°C on Tue night, min 25°C on Mon afternoon). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Thu night. Warm (max 29°C on Thu morning, min 28°C on Thu morning). Wind will be generally light. | Days 6-9 Weather Summary Heavy rain (total 27mm), heaviest during Tue afternoon. Warm (max 29°C on Sun morning, min 27°C on Tue afternoon). Winds increasing (light winds from the W on Sun morning, fresh winds from the W by Tue afternoon). | Long Range Forecast: Heavy rain (total 66mm), heaviest during Fri night. Warm (max 29°C on Wed morning, min 28°C on Fri night). Mainly fresh winds. | |||||||||||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Similan Islands 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 Similan Islands Surf forecast
The above surf forecast table for Similan Islands provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Similan Islands can be found by selecting the local surf guide option on the grey menu. Our Similan Islands 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 (Similan Islands) 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 Similan Islands 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.
Similan Islands is 107 km (66 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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