Thailand surfForecast / Simeulue Island / Indonesia

information circle12 Day Weather and Surf, issued 12 am Tuesday 23 Dec 2025 WIB
Forecast update in hr  min  s Forecast update imminent
Thailand surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Thailand sea temperature is
29.5° C
(Which is slightly warmer than usual)


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 Tuesday (Dec 23) at 7AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.6m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thailand in the next 12 days are 1.4m 16s and forecast to arrive on Saturday (Dec 27) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave TypeTime (WIB) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Tue 23rd Dec)2.5ft (0.7m) 14s
Best Surf 4PM (Fri 26th Dec)2.5ft (0.8m) 18s
Most Powerful10PM (Sat 27th Dec)4.5ft (1.4m) 16s

Table - best surf conditions forecast for Thailand over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 29°C on Tue afternoon, min 27°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 33mm), heaviest during Thu night. Warm (max 28°C on Thu night, min 26°C on Fri night). Wind will be generally light.

Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Mon
29
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
2
1
2
2
1
2
1
1
1
2
3
2
2
2
2
2
1
1
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.7
SW
0.8
SW
0.8
SW
0.8
S
0.9
S
0.9
S
0.7
SW
0.5
S
0.7
SW
0.9
SW
0.7
SW
0.8
SSW
1.1
SW
1.2
SW
1.2
SW
1.2
SW
1.1
SW
1.1
SW
1
SW
0.8
SW
0.7
SW
Period(s) (?)141413101110131814142018181616151414141313
Wave
Graph
(?)Metric surfscale
Energy kJ (?)211224215140188174180156194305388427711757748657482476395205175
Wind
(km/h)
5
SW
5
ESE
10
SSE
5
SSW
5
NE
5
SW
10
NNW
5
NW
10
SW
15
WSW
10
SW
5
W
10
S
10
SSE
10
SSE
10
SE
15
ESE
20
SE
15
SSE
15
S
15
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
off
cross-
on
glassoffoncross-
off
crossonononglasscross-
on
crosscrosscrosscross-
off
crosscrosscross-
on
cross-
on
High Tide
/ height (m)
8:02AM
0.39
8:18PM
0.69
8:40AM
0.40
8:51PM
0.68
9:24AM
0.42
9:25PM
0.65
10:14AM
0.44
10:03PM
0.60
11:13AM
0.46
10:49PM
0.54
12:22PM
0.49
11:48PM
0.47
1:36PM
0.54
Low Tide
/ height (m)
2:28AM
0.08
1:23PM
0.07
3:00AM
0.09
1:59PM
0.11
3:34AM
0.10
2:39PM
0.15
4:10AM
0.11
3:27PM
0.20
4:50AM
0.12
4:31PM
0.25
5:35AM
0.12
6:03PM
0.28
6:29AM
0.12
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Mon
29
Sunrise-6:33--6:33--6:33--6:35--6:35--6:35--6:35-
Sunset--6:32--6:32--6:34--6:34--6:35--6:35--6:36
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
part cloud
rain showers
thunderstorm
part cloud
rain showers
thunderstorm
thunderstorm
Rain (mm)
---------95181-45-1071
Temp. °C282829282829282929282828272828272827272626
Feels °C (?)323232323232313333313232313131302929292828
  • 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 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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