Thunders 48 hour detailed Surf Forecast

Lat Long: 3.08° S 100.19° E

Issued: 12 pm 18 Sep 2026 (local time)

Forecast update in hr min

Today's Thunders sea temperature is

28.6°C

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

Surf Forecasts:

How big are the waves at Thunders today (18 Sep):

Morning surf: Morning surf (18 Sep, local time) - 4.5ft (1.4m), 15s period with SW swell.
Afternoon surf: Afternoon surf (18 Sep, local time) - 4.5ft (1.4m), 14s period with SSW swell.
Evening surf: Evening surf (18 Sep, local time) - 4.5ft (1.3m), 14s period with SSW swell.

The current surf forecast for Thunders at 9PM is: 1.3m 14s primary swell from a South-southwest direction and 0.7m 18s secondary swell from a Southwest direction, 1.1m 6s secondary swell from a South-southeast direction (forecast issued at 12:00pm September 18). The wind direction is predicted to be cross-onshore.

Time (WIB) & Date	Wave Height	Wave Period
Morning (18 Sep)	4.5ft (1.4m)	15s
Afternoon (18 Sep)	4.5ft (1.4m)	14s
Evening (18 Sep)	4.5ft (1.3m)	14s

Table - waves today at Thunders. (Swell directed towards the surf break)

	Short Range Forecast Heavy rain (total 29mm), heaviest during Sat night. Warm (max 27°C on Fri morning, min 25°C on Fri night). Wind will be generally light.
	Fri 18					Saturday 19								Sunday 20
	10 AM	1 PM	4 PM	7 PM	10 PM	1 AM	4 AM	7 AM	10 AM	1 PM	4 PM	7 PM	10 PM	1 AM	4 AM	7 AM	10 AM	1 PM	4 PM	7 PM	10 PM
Rating (10 max)	1	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	0	1	1	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	SW 15	SSW 14	SSW 14	SSW 14	SSW 14	SSW 14	SW 18	SW 18	SW 17	SW 17	SW 17	SW 16	SW 16	SW 16	SW 16	SW 16	SW 16	SSW 16	SSW 16	SSW 15	SSW 15
Wave Graph
kJ	869	796	691	682	672	663	621	1974	2238	1717	1938	2468	2475	2320	2291	2291	2262	2151	2123	1963	1648
Wind (km/h)	SSE	SSE	SSE	SSE	SE	SSE	SSE	SE	SE	SSE	SSE	SSE	SE	SE	ESE	SE	SE	SE	SE	SE	SE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on	cross-on
High Tide						10:29PM0.74m			9:59AM0.41m					11:36PM0.68m				12:04PM0.36m
Low Tide			3:13PM0.18m					5:17AM0.32m			3:44PM0.24m						7:47AM0.34m			4:32PM0.31m


	6:09	—	—	—	—	—	6:09	—	—	—	—	—	—	—	6:09	—	—	—	—	—	—
	—	—	6:15	—	—	—	—	—	—	—	6:15	—	—	—	—	—	—	—	6:15	—	—
mm	1	2	1	1	—	—	1	2	2	—	—	—	—	2	7	6	1	—	—	—	—
Temp °C	27	27	27	26	26	26	25	26	27	27	27	26	26	26	25	25	25	26	27	26	26
Feels °C	29	28	28	27	27	27	26	27	27	27	28	27	27	28	27	26	26	27	29	28	29
Swell 1 Height (m) Direction Period (s)	SW 15	SSW 14	SSW 14	SSW 14	SSW 14	SSW 14	SW 14	SW 18	SW 17	SW 17	SW 17	SW 16	SW 16	SW 16	SW 16	SW 16	SW 16	SSW 16	SSW 16	SSW 15	SSW 15
kJ	869	796	691	682	672	663	581	1974	2238	1717	1938	2468	2475	2320	2291	2291	2262	2151	2123	1963	1648
Swell 2 Height (m) Direction Period (s)	WNW 9	WNW 9	SW 20	SW 19	SW 18	SW 18	SW 18	WNW 8	WNW 8	SW 13	SW 13	WNW 8	WNW 8	WNW 8	WNW 8	WNW 8	WNW 8	WNW 8	WNW 7	WNW 7	W 16
kJ	26	25	136	179	388	465	621	13	13	517	394	12	12	12	6	6	6	6	5	5	5
Swell 3 Height (m) Direction Period (s)	SW 20	SW 20	WNW 8	WNW 8	WNW 8	WNW 8	WNW 8	W 15	W 15	WNW 8	WNW 8	W 15	W 15	—	—	—	—	—	—	—	—
kJ	99	98	24	23	14	13	14	4	4	13	12	4	4	—	—	—	—	—	—	—	—
Wind waves Height (m) Direction Period (s)	SSE 7	SSE 7	SSE 7	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SSE 6	SE 6	SE 6	SSE 6	SSE 6
kJ	64	68	83	71	82	82	71	82	77	82	85	71	73	77	71	60	82	91	83	67	66
Nearest Offshore or Glassy	Bommie Peak Mentawi Islands	Bommie Peak Mentawi Islands	Bommie Peak Mentawi Islands	Ujung Walur Sumatra - Mainland	Jimmys Sumatra - Mainland	Hideaways (Mentawi Islands) Mentawi Islands	Pitstops Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Icelands Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Ujung Walur Sumatra - Mainland	Green Bush Mentawi Islands	Green Bush Mentawi Islands	Rags Left Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Hideaways (Mentawi Islands) Mentawi Islands	Telescopes Mentawi Islands	Green Bush Mentawi Islands
Rating (10 max)	3	3	3	3	4	3	2	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Distance (km)	62	62	62	475	450	168	173	168	168	138	168	475	32	32	9	168	168	168	168	135	32
Best forecast wave conditions in Mentawi Islands	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Bommie Peak			Hideaways (Mentawi Islands)	Beng Beng	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)		Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Hideaways (Mentawi Islands)	Beng Beng	Hideaways (Mentawi Islands)
Rating (10 max)	3	3	3			3	2	4	4	4	4		4	4	4	4	4	4	4	4	4
Best forecast wave conditions in Indonesia	Desert Point (Bangko-Bangko) Lombok - West	Super Suck Sumbawa	Asu Nias	Keusik Luhur Java - Central	Keusik Luhur Java - Central	Keusik Luhur Java - Central	Keusik Luhur Java - Central	Keusik Luhur Java - Central	Benkunqut Sumatra - Mainland	Hideaways (Mentawi Islands) Mentawi Islands	Treasure Island Banyak Islands	Batu Mandi Java - Central	Impossibles Bali - The Bukit	Super Suck Sumbawa	Super Suck Sumbawa	Super Suck Sumbawa	T-Land Timor	Ndao Timor	Super Suck Sumbawa	Savu Left Timor	Super Suck Sumbawa
Rating (10 max)	4	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Header Global	Otago Peninsula - Papanui Beach New Zealand	Otago Peninsula - Allans Beach New Zealand	Otago Peninsula - Sandfly Bay New Zealand	Otago Peninsula - Allans Beach New Zealand	Weld Road New Zealand	El Huerto Spain	El Huerto Spain	Cathedral Rock Australia	Shingles New Zealand	Fairhaven Australia	Kaifu Rivermouth Japan	Trial Harbour Australia	Trial Harbour Australia	Easter Reef Australia	Asu Indonesia	Asu Indonesia	Gas Bay Australia	Easky Left Ireland	Papatowai New Zealand	Papatowai New Zealand	Cobblestones Australia
Rating (10 max)	5	5	5	4	6	5	5	5	5	5	5	8	8	5	4	4	5	5	9	9	6

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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Thunders 48 hour detailed Surf Forecast

How big are the waves at Thunders today (18 Sep):

Short Range Forecast

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