Surf spot

Bang Niang Rivermouth

Forecast conditions and map view for Bang Niang Rivermouth in Thailand. Open the interactive surf map to inspect wind, waves, and nearby spots.

Country: Thailand
Coordinates: 8.6743, 98.2409

Metric
Metric	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00	18:00	21:00	00:00	03:00	06:00	09:00	12:00	15:00
Wave height (m)	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.4	0.5	0.4	0.3	0.5	0.2	0.4	0.3	0.4	0.5	0.5	0.3	0.5	0.3	0.3	0.3	0.5	0.5	0.6	0.5	0.7	0.6	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.6	0.6
Wave direction	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	SW	WSW	SW	WSW	WSW	WSW	SW	WSW	SW	W	SW	SW	WSW	W	WSW	W	WSW	WSW	WSW	WSW	WSW	WSW	SW	W	SW	WNW	WNW	WNW	WNW	WNW	WNW	WSW	WSW	WSW	WSW	WSW	WSW	SW
Wave period (s)	14.5	14.8	14.7	14.6	14.6	14.4	14	13.8	13.4	13.3	13	12.7	12.4	12.2	12	11.8	11.6	11.3	10.8	5.3	4	3.3	3.1	5.1	6.2	3.5	10.7	3.5	5.2	3.5	5.9	4.2	5	3.7	4.8	4.8	4.8	4	5	5	5.8	5.5	5.5	6.3	6.5	6.8	7	6.8	6.6	6.5	6.3	6.3	6	5.8	5.2	5
Wave energy (kJ)	20	21	25	29	33	37	40	39	37	36	35	33	31	27	26	25	21	17	16	6	2	4	4	7	7	6	11	5	6	3	15	9	5	6	4	5	5	8	12	20	17	26	24	24	22	23	25	25	24	23	19	18	19	17	18	19
Wind speed (km/h)	1.5	3.9	2.2	4.7	9.1	4.9	1.1	2.2	2.6	2.5	4	5.4	7.4	10.2	4.8	4	4	4.3	4.4	6.9	9.1	8	3.3	1.5	0.5	1.5	2.2	5.6	9.5	7.6	3.6	3.6	1.1	1.1	2	7.4	10.8	13.5	11.7	18.3	18.5	12.9	13.4	8.6	11.7	14	18.8	14.8	13.4	13.5	10.4	11.6	7.5	12	11.2	8.2
Wind direction	ENEGlassy	ENEGlassy	EGlassy	WGlassy	WOnshore	NWGlassy	NNEGlassy	EGlassy	SSEGlassy	SGlassy	SGlassy	SSWCross	SWCross	SWCross	SSWGlassy	SGlassy	SGlassy	SGlassy	SGlassy	SWCross	WSWCross-on	WCross-on	NWGlassy	NNWGlassy	NWGlassy	SSEGlassy	SGlassy	WSWCross-on	WCross-on	WCross-on	WGlassy	WGlassy	WNWGlassy	WNWGlassy	SEGlassy	WSWCross-on	WCross-on	NWOnshore	NWOnshore	WOnshore	WCross-on	NWOnshore	WNWOnshore	WOnshore	WOnshore	WNWOnshore	WNWOnshore	WNWOnshore	WOnshore	WOnshore	WOnshore	WOnshore	WNWOnshore	WOnshore	WSWCross-on	WSWCross-on

Bang Niang Rivermouth, Thailand is a mellow tropical surf spot on the Andaman coast, near Khao Lak in Phang Nga province. It’s a river mouth break where the sandbar and river flow help shape the waves, making it a fun, accessible option when conditions line up.

What it’s like

Wave type: Mostly a beachbreak/river-mouth setup
Best for: Beginners to intermediate surfers
Wave quality: Typically softer and less powerful than Thailand’s better-known reef or point breaks
Crowds: Usually lighter than major surf destinations, though it can get busy in peak season or on good swell days

Conditions

Best swell: Smaller to medium swells
Wind: Offshore winds from the right direction can clean it up nicely
Tide: Can be tide-sensitive since sandbars shift around the river mouth
Season: The main surf season on Thailand’s Andaman coast is generally May to October, during the southwest monsoon

What makes it interesting

The river mouth sandbars can create playful, rideable peaks.
It’s often a good place to learn or warm up because the waves are usually manageable.
The area around Khao Lak has a laid-back feel, with beaches, guesthouses, and easy access to other nearby surf checks.

Things to keep in mind

Conditions can be inconsistent and change with tides, swell direction, and sand movement.
River mouths can have currents, especially after rain or bigger swell.
Local knowledge helps a lot for choosing the best time and takeoff spot.