Similan Islands Surf Break

Lat Long: 8.57° N 97.63° E

Similan Islands Surf Forecast and Surf Report

Issued: 12 am 11 Jul 2026 (local time)

Forecast update in  hr  min

Today's Similan Islands sea temperature is
29.7° C
0.7° 

Similan Islands surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Similan Islands surf forecast from 10 Jul 2026:

  • Most powerful swell: Monday 13 Jul, 10AM (local time) - 10ft (3.0m), 8s period, WSW swell with 1,058 kJ wave energy.

Best Forecast Surf Conditions for Similan Islands this week:

The most powerful waves expected at Similan Islands in the next 16 days are 3.0m 8s and forecast to arrive on Monday (Jul 13) 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 0.1m 5s period and expected on Wednesday (Jul 15) at 1AM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10AM (Mon 13th Jul)10ft (3.0m) 8s

Table - best surf conditions forecast for Similan Islands over the next 16 days.


Short Range Forecast

Moderate rain (total 12mm), heaviest on Mon morning. Warm (max 29°C on Sun afternoon, min 28°C on Fri night). Mainly strong winds.

Days 4-6 Weather Summary

Heavy rain (total 38mm), heaviest during Tue morning. Warm (max 28°C on Mon night, min 28°C on Mon night). Mainly fresh winds.

Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
WSW
6
1.9
WSW
7
2.2
WSW
7
2.5
WSW
8
2.5
WSW
8
2.5
W
8
3
WSW
8
2.4
W
8
2.2
W
8
2.5
WSW
8
2.2
W
8
2.1
W
8
2.2
W
8
2
W
8
1.9
W
9
2
W
8
2
W
8
1.7
W
8
1.8
W
8
1.9
W
7
2
W
8
Wave Graph
Metric surfscale
Energy kJ
237
307
445
822
867
857
1058
819
650
893
675
617
659
559
537
546
539
377
358
381
458
Wind (km/h)
30
WSW
30
WSW
40
WSW
35
SW
35
WSW
35
WSW
35
WSW
35
WSW
30
WSW
35
WSW
30
SW
30
SW
30
WSW
30
WSW
25
WSW
30
WSW
25
WSW
25
WSW
30
WSW
30
WSW
35
WSW
Wind State
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
on
on
cross-on
on
on
on
High Tide
7:02AM1.91m
7:35PM1.59m
8:08AM2.04m
8:45PM1.70m
9:06AM2.18m
9:42PM1.83m
9:57AM2.31m
10:32PM1.93m
10:44AM2.39m
11:18PM2.01m
11:27AM2.41m
00:00AM2.04m
12:07PM2.36m
00:41AM2.03m
Low Tide
1:44PM0.53m
1:42AM0.47m
2:48PM0.35m
2:47AM0.37m
3:42PM0.17m
3:41AM0.26m
4:30PM0.04m
4:29AM0.19m
5:14PM-0.03m
5:14AM0.17m
5:55PM-0.04m
5:57AM0.20m
6:34PM0.01m
part cloud
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:16
6:16
6:16
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:52
6:52
6:52
6:52
6:52
6:52
6:52
 mm
1
1
1
2
3
2
9
7
2
3
5
2
5
2
3
2
1
Temp °C
28
28
28
28
29
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
28
Feels °C
27
27
27
27
28
27
26
27
28
27
27
28
28
28
29
28
28
29
28
27
28
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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 16 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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