Similan Islands surfForecast / Andaman Sea / Thailand

information circle16 Day Weather and Surf, issued 6 pm Tuesday 26 May 2026 +07
Forecast update in hr  min  s Forecast update imminent
Similan Islands surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Similan Islands sea temperature is
30.2° C
(Which is slightly warmer than usual)

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 Tuesday (Jun 02) at 7AM. Winds are predicted to be onshore at the time the swell arrives.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 7AM (Tue 2nd Jun)10ft (3.0m) 8s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 27mm), heaviest during Tue night. Warm (max 29°C on Tue afternoon, min 27°C on Tue night). Winds increasing (light winds from the W on Wed morning, fresh winds from the W by Thu night).

Days 5-7 Weather Summary

Heavy rain (total 66mm), heaviest during Fri afternoon. Warm (max 28°C on Fri night, min 26°C on Fri afternoon). Mainly strong winds.

Tue
26
Wednesday
27
Thursday
28
Friday
29
Saturday
30
Sunday
31
Monday
1
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
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
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
WSW
7
1.3
W
8
0.6
SW
16
0.6
SW
15
0.6
SW
15
1.7
WSW
7
1.8
WSW
7
1.7
W
7
1.6
W
7
1.8
WSW
7
1.7
WSW
7
1.8
WSW
7
2.2
WSW
7
2.4
WSW
8
2
WSW
7
2.3
WSW
7
2.5
WSW
8
2.5
WSW
8
2.5
WSW
8
3
W
9
3
WSW
8
Wave Graph
Metric surfscale
Energy kJ
198
206
157
139
134
261
308
274
240
308
289
317
471
640
426
573
746
886
908
1228
1313
Wind (km/h)
25
W
25
W
10
W
25
W
30
WSW
25
W
30
W
35
W
30
WSW
30
W
25
WSW
35
WSW
35
WSW
30
W
35
WSW
35
W
40
WSW
40
WSW
40
WSW
40
WSW
40
WSW
on
on
on
on
on
on
on
on
on
on
cross-on
on
on
on
on
on
on
on
on
cross-on
cross-on
High Tide
6:59PM1.63m
7:38AM1.84m
7:50PM1.66m
8:17AM1.94m
8:33PM1.69m
8:52AM2.01m
9:11PM1.72m
9:25AM2.07m
9:47PM1.75m
9:58AM2.10m
10:21PM1.75m
10:32AM2.11m
10:55PM1.74m
11:06AM2.10m
Low Tide
1:21AM0.55m
2:05PM0.60m
2:03AM0.50m
2:46PM0.49m
2:40AM0.45m
3:22PM0.39m
3:14AM0.40m
3:55PM0.32m
3:46AM0.37m
4:28PM0.27m
4:19AM0.36m
5:00PM0.26m
4:50AM0.36m
rain showers
thunderstorm
cloud
part cloud
thunderstorm
part cloud
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:43
6:43
6:43
6:44
6:44
6:44
6:44
6:45
1
10
2
2
5
7
14
9
4
14
13
3
4
2
3
2
4
2
Temp °C
29
28
29
29
29
29
29
29
28
26
28
28
27
28
28
28
28
28
28
28
28
30
29
31
30
30
30
29
29
28
26
29
27
25
27
27
26
27
26
26
27
26
Swell 1
Height (m)
Direction
Period (s)
0.3
SW
16
0.3
SW
16
1.2
W
6
0.6
W
8
0.6
SW
15
0.5
SW
14
0.5
SW
17
0.6
SW
16
0.6
SW
15
0.6
SW
15
0.5
SW
14
0.4
SW
14
0.4
SW
14
0.4
SW
13
0.3
SW
13
0.3
SW
13
0.2
NNW
6
0.2
SSW
12
0.2
SSW
12
0.3
SW
16
0.3
SW
16
Energy kJ
42
41
123
45
134
97
142
203
149
136
102
71
67
45
27
27
3
15
15
42
38
Swell 2
Height (m)
Direction
Period (s)
0.3
SW
13
0.3
SW
13
0.6
SW
16
0.6
SW
15
0.1
SW
20
0.3
SW
18
0.4
SW
13
0.1
NW
6
0.2
SSW
13
0.1
SW
17
0.1
SW
16
Energy kJ
27
27
157
139
15
50
61
2
16
12
10
Swell 3
Height (m)
Direction
Period (s)
0.3
SW
13
0.1
SW
15
Energy kJ
27
9
Wind waves
Height (m)
Direction
Period (s)
1.5
WSW
7
1.3
W
8
1
W
6
1.3
W
6
1.7
WSW
7
1.8
WSW
7
1.7
W
7
1.6
W
7
1.8
WSW
7
1.7
WSW
7
1.8
WSW
7
2.2
WSW
7
2.4
WSW
8
2
WSW
7
2.3
WSW
7
2.5
WSW
8
2.5
WSW
8
2.5
WSW
8
3
W
9
3
WSW
8
Energy kJ
198
206
73
110
261
308
274
240
308
289
317
471
640
426
573
746
886
908
1228
1313
Nearest Offshore or Glassy
Rating
(10 max)
4
1
4
1
1
2
4
3
4
2
2
4
2
2
2
2
2
2
3
2
2
Distance (km)
864
633
864
97
112
633
698
633
698
97
633
698
633
633
97
633
716
716
698
716
716
Best forecast wave conditions in Andaman Sea
Rating
(10 max)
Best forecast wave conditions in Thailand
Rating
(10 max)
1
1
2
2
Header Global
Rating
(10 max)
9
6
6
7
9
6
9
7
6
5
5
5
4
7
7
4
7
4
4
4
4
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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