Thailand Surf Forecast

/ Simeulue Island (4 surf breaks) /

Indonesia (168 surf breaks)

Surf Forecasts:

Thailand surfForecast / Simeulue Island / Indonesia

12 Day Weather and Surf, issued 12 pm Sunday 14 Sep 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 Monday (Sep 15) at 7AM. The primary swell is predicted to be 1.3m and 14s period with a secondary swell of 1.3m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thailand in the next 12 days are 1.8m 16s and forecast to arrive on Sunday (Sep 21) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives.

Wave Type	Time (WIB) & Date	Wave Height & Period
Next good surf (1 star+)	7AM (Mon 15th Sep)	4.5ft (1.3m) 14s
Best Surf	10PM (Tue 16th Sep)	4ft (1.2m) 14s
Most Powerful	4AM (Sun 21st Sep)	6ft (1.8m) 16s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 67mm), heaviest during Sun afternoon. Warm (max 28°C on Tue morning, min 23°C on Sun afternoon). Winds decreasing (fresh winds from the WSW on Sun morning, calm by Tue morning).									Days 3-6 Weather Summary Some drizzle, heaviest during Thu night. Warm (max 28°C on Wed morning, min 26°C on Wed night). Wind will be generally light.
	Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	1	0	1	3	3	2	3	3	3	4	3	4	4	2	2	3	2	2	4	3	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	SW	SW	SW	SSW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW
Period(s) (?)	15	14	14	14	15	14	14	14	16	15	15	14	14	14	13	14	13	13	17	17	17
Wave Graph (?)
kJ (?)	869	857	731	644	805	626	626	635	669	1453	1237	1158	975	874	735	661	484	531	1450	1133	1578
Wind (km/h)	SW	WSW	SW	NE	N	NW	WSW	SW	SW	W	SW	W	WNW	W	WNW	NNW	WNW	WNW	NNW	WNW	NW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	on	on	on	off	cross- off	cross	glass	glass	on	glass	on	glass	glass	cross- on	cross- on	glass	cross- on	cross- on	cross- off	cross	cross
High Tide / height (m)			11:14PM 0.57	10:58AM 0.27		12:54AM 0.53		2:04PM 0.24	2:48AM 0.54		4:04PM 0.31	3:59AM 0.59		4:47PM 0.39		4:46AM 0.63	5:19PM 0.47		5:23AM 0.65	5:49PM 0.54
Low Tide / height (m)		3:34PM 0.09		7:02AM 0.23	4:16PM 0.15		9:47AM 0.19	6:24PM 0.21		10:38AM 0.14		9:10PM 0.19	11:09AM 0.10		10:18PM 0.15	11:34AM 0.07		11:04PM 0.11	11:56AM 0.06		11:41PM 0.08

	Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Saturday 20
Sunrise	6:26	-	-	6:26	-	-	6:26	-	-	6:24	-	-	6:24	-	-	6:24	-	-	6:24	-	-
Sunset	-	6:34	-	-	6:34	-	-	6:32	-	-	6:32	-	-	6:31	-	-	6:31	-	-	6:30	-

Rain (mm)	15	39	7	5	1	-	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-
Temp. °C	26	24	25	25	26	26	28	28	27	28	28	27	28	28	27	28	28	27	28	28	27
Feels °C (?)	29	24	25	28	29	30	32	31	31	32	31	31	31	31	30	32	31	31	32	31	30

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Simeulue Island

Wind Update The wind is still cross-on at Thailand (light winds from the W at SibolgaPinangsori 299 km from Thailand). 1.3m 6s windswell from the WSW with a 1.2m 14s groundswell from the SW and a 0.5m 10s swell from the S. 3 swells combining to make bigger set waves.
1 hour 48 minutes ago Thailand

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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.