Thunders Surf Forecast

/ Mentawi Islands (22 surf breaks) /

Indonesia (168 surf breaks)

Surf Forecasts:

Thunders surfForecast / Mentawi Islands / Indonesia

12 Day Weather and Surf, issued 6 am Sunday 12 Oct 2025 WIB

Forecast update in hr min s Forecast update imminent

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

Today's Thunders sea temperature is 29.9° C
(Which is 1.4°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Thunders this week:

The surf forecast for Thunders over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Oct 12) at 10PM. The primary swell is predicted to be 0.7m and 15s period with a secondary swell of 0.9m and 8s. Another secondary swell of 0.8m and 12s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Thunders in the next 12 days are 2.2m 17s and forecast to arrive on Tuesday (Oct 14) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 7s period and expected on Friday (Oct 17) at 10AM.

Wave Type	Time (WIB) & Date	Wave Height & Period
Next good surf (1 star+)	10PM (Sun 12th Oct)	2.5ft (0.7m) 15s
Best Surf	4AM (Tue 14th Oct)	3.5ft (1.1m) 22s
Most Powerful	10PM (Tue 14th Oct)	7ft (2.2m) 17s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Moderate rain (total 13mm), heaviest on Sun night. Warm (max 29°C on Tue afternoon, min 26°C on Sun night). Wind will be generally light.									Days 3-6 Weather Summary Heavy rain (total 40mm), heaviest during Thu night. Warm (max 29°C on Wed afternoon, min 25°C on Fri night). Wind will be generally light.
	Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18
	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	2	2	2	2	3	4	3	4	4	3	4	4	3	4	4	2	3	2	0	3
Swell Height Map See all maps
Wave Height (m) & direction (?)	S	S	S	SW	SW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SSW	SW	SSW	SW	SSW	SSW	SW	SW	SW
Period(s) (?)	16	15	15	12	12	23	20	18	17	16	16	15	14	14	13	13	14	14	13	13	13
Wave Graph (?)
kJ (?)	178	228	205	181	175	651	2510	2602	2604	2234	1880	1297	1142	811	599	517	796	691	517	509	394
Wind (km/h)	SE	SE	N	NW	WNW	ESE	SSE	WSW	S	W	SSW	ESE	WNW	WSW	SE	NW	W	NNW	WNW	WSW	SSE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	glass	cross- off	glass	glass	glass	cross- on	glass	glass	cross- on	glass	glass	cross- on	glass	cross- off	cross- off	off	cross- off	cross- on	glass
High Tide / height (m)			9:40PM 0.96	10:07AM 0.47		10:43PM 0.86	11:35AM 0.43		12:06AM 0.78		1:39PM 0.46	1:40AM 0.74		3:08PM 0.55	2:57AM 0.74		3:58PM 0.66	3:53AM 0.76		4:35PM 0.76
Low Tide / height (m)		2:36PM 0.09		4:37AM 0.17	3:19PM 0.18		6:05AM 0.23	4:20PM 0.27		7:55AM 0.25	6:20PM 0.35		9:09AM 0.22		8:38PM 0.34	9:52AM 0.19		9:53PM 0.29	10:23AM 0.17		10:43PM 0.23

	Sunday 12			Monday 13			Tuesday 14			Wednesday 15			Thursday 16			Friday 17			Saturday 18
Sunrise	6:01	-	-	6:00	-	-	6:00	-	-	6:00	-	-	5:58	-	-	5:58	-	-	5:58	-	-
Sunset	-	6:09	-	-	6:09	-	-	6:09	-	-	6:09	-	-	6:09	-	-	6:09	-	-	6:08	-

Rain (mm)	2	2	5	-	1	-	1	-	2	1	-	4	1	-	13	4	2	15	4	1	6
Temp. °C	28	28	26	28	28	27	28	29	28	28	29	27	28	29	27	27	27	26	26	26	26
Feels °C (?)	31	31	30	32	32	32	33	33	32	32	33	31	33	32	31	30	28	28	28	27	29

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 Mentawi Islands

Wind Update Continuing clean conditions at Thunders (calm at BengkuluPadangKemiling 254 km from Thunders). 0.6m 8s swell from the SSE with a 0.4m 15s groundswell from the S and a 0.3m 14s groundswell from the SSW. 3 swells combining to make bigger set waves.
57 minutes ago Thunders

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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 Thunders 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 Thunders Surf forecast

The above surf forecast table for Thunders provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Thunders can be found by selecting the local surf guide option on the grey menu. Our Thunders 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 (Thunders) 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 Thunders 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 Mentawi Islands? If you are looking for accommodation near Thunders, camping, hotels and holiday cottages in Mentawi Islands, consider staying in Sungaipenuh which is 172 km (107 miles) away.