Dark Reef 48 hour detailed Surf Forecast

Lat Long: 12.16° N 109.20° E

Issued: 12 am 20 Sep 2026 (local time)

Forecast update in hr min

Today's Dark Reef sea temperature is

29.6°C

Dark Reef 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 Dark Reef today (20 Sep):

Morning surf: Morning surf (20 Sep, local time) - 2.5ft (0.7m), 8s period with NE swell.
Afternoon surf: Afternoon surf (20 Sep, local time) - 3ft (0.9m), 7s period with NNE swell.
Evening surf: Evening surf (20 Sep, local time) - 3ft (0.9m), 7s period with NNE swell.

The current surf forecast for Dark Reef at 7AM is: 0.7m 8s primary swell from a Northeast direction and 0.5m 3s secondary swell from a North direction (forecast issued at 12:00am September 20). An open ocean swell of 0.2m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (+07) & Date	Wave Height	Wave Period
Morning (20 Sep)	2.5ft (0.7m)	8s
Afternoon (20 Sep)	3ft (0.9m)	7s
Evening (20 Sep)	3ft (0.9m)	7s

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

	Short Range Forecast Heavy rain (total 35mm), heaviest during Mon afternoon. Warm (max 29°C on Sun morning, min 25°C on Sat night). Wind will be generally light.
	Sunday 20								Monday 21								Tuesday 22
	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	1 AM	4 AM	7 AM	10 AM	1 PM	4 PM	7 PM	10 PM
Rating (10 max)	1	1	1	0	0	0	0	1	1	1	1	1	0	0	0	0	1	1	1	0	0	0	0	1
Swell Height Map See all maps
Wave Height (m) Direction Period (s)	NE 8	NE 8	NE 8	NE 8	NE 7	NNE 7	NNE 5	NNE 7	NNE 7	NE 7	NE 7	NNE 7	NNE 7	NNE 7	NNE 5	NNE 6	NNE 6	NNE 6	N 6	NE 16	NE 16	NE 15	NE 15	ENE 15
Wave Graph
kJ	75	60	59	45	65	111	35	88	66	54	54	72	61	96	69	66	57	45	60	63	64	113	112	144
Wind (km/h)	NNW	NW	NW	NE	NE	NE	NNE	NNW	WNW	WNW	WNW	E	ENE	NE	NNE	N	WNW	NW	NW	NNE	NE	NE	NNE	NNE
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy	cross-off	cross-off	cross-off	cross-on	cross-on	cross-on	cross	cross-off	cross-off	cross-off	cross-off	glassy	on	cross-on	cross-on	cross	cross-off	cross-off	cross-off	cross-on	cross-on	cross-on	cross-on	cross-on
High Tide		1:39AM1.37m								2:41AM1.34m									4:14AM1.32m
Low Tide					12:48PM0.35m									1:47PM0.32m								2:30PM0.30m


	—	5:31	—	—	—	—	—	—	—	5:31	—	—	—	—	—	—	—	5:31	—	—	—	—	—	—
	—	—	—	—	—	5:40	—	—	—	—	—	—	—	5:39	—	—	—	—	—	—	—	5:38	—	—
mm	—	—	—	—	1	2	2	1	—	1	1	1	2	4	4	2	1	—	—	1	2	4	4	2
Temp °C	26	25	26	29	29	29	27	27	26	25	26	29	28	28	27	27	26	25	26	28	28	27	27	27
Feels °C	30	29	30	32	31	31	30	31	30	29	30	33	32	31	31	31	30	29	30	32	30	30	30	31
Swell 1 Height (m) Direction Period (s)	NE 8	NE 8	NE 8	NE 8	ENE 13	ENE 13	NE 7	NNE 7	NNE 7	NE 7	NE 7	NE 7	ENE 12	NE 12	NE 12	ENE 17	NNE 6	NNE 6	NNE 6	NE 16	NNE 6	ENE 15	S 8	S 7
kJ	75	60	59	45	17	17	25	88	66	54	54	53	14	6	6	28	44	44	33	63	46	88	63	38
Swell 2 Height (m) Direction Period (s)	S 6	S 5	S 5	ENE 13	S 5	—	ENE 13	ENE 13	ENE 12	ENE 12	NE 12	ENE 12	E 19	NE 18	NE 18	ENE 12	ENE 17	ENE 17	ENE 15	NE 12	NE 16	SSW 8	ENE 15	ENE 15
kJ	2	2	2	17	2	—	17	16	15	15	6	15	7	13	12	14	27	29	46	5	64	13	87	84
Swell 3 Height (m) Direction Period (s)	ENE 13	ENE 13	ENE 13	S 5	S 5	—	—	—	—	—	—	—	—	—	—	—	NE 12	NE 12	NE 12	S 6	SSW 7	NE 15	NE 15	ENE 15
kJ	17	17	17	2	2	—	—	—	—	—	—	—	—	—	—	—	6	5	5	1	5	113	112	144
Wind waves Height (m) Direction Period (s)	—	NNE 3	N 3	N 4	NE 7	NNE 7	NNE 5	—	—	—	—	NNE 7	NNE 7	NNE 7	NNE 5	NNE 6	NNE 6	NNE 6	N 6	NNE 6	NNE 5	NNE 6	NNE 6	NNE 6
kJ	—	3	5	6	65	111	35	—	—	—	—	72	61	96	69	66	57	45	60	34	47	43	40	36
Nearest Offshore or Glassy	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Cobra Reef - Cemento West Luzon	Cape Pakarang Left Andaman Sea	Koh Lanta - Khlong Dao Andaman Sea	Lang Co Da Nang	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Bang Niang Rivermouth Andaman Sea	Bang Niang Rivermouth Andaman Sea	Lang Co Da Nang	Hon Chong Beach Break Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Bang Niang Rivermouth Andaman Sea	Bang Niang Rivermouth Andaman Sea	Badoc Island Lefts West Luzon	Lang Co Da Nang	Cue Dai Beach Da Nang
Rating (10 max)	1	1	1	2	3	1	1	1	1	1	1	1	2	2	1	1	1	1	1	1	1	1	1	2
Distance (km)	0	0	0	1395	1260	1223	471	0	0	0	0	0	1260	1260	471	13	0	0	0	1260	1260	1363	471	425
Best forecast wave conditions in Khánh Hoà	Dark Reef	Dark Reef	Dark Reef					Dark Reef	Dark Reef	Dark Reef	Dark Reef	Dark Reef				Hon Chong Beach Break	Dark Reef	Dark Reef	Dark Reef
Rating (10 max)	1	1	1					1	1	1	1	1				1	1	1	1
Best forecast wave conditions in Vietnam	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà				Lang Co Da Nang	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà			Binh An Da Nang	China Beach Da Nang	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà	Dark Reef Khánh Hoà				Binh An Da Nang	Cue Dai Beach Da Nang
Rating (10 max)	1	1	1				1	1	1	1	1	1			1	2	1	1	1				1	2
Header Global	Luna Park Australia	Asu Indonesia	Asu Indonesia	Asu Indonesia	Nine Mile New Zealand	Papatowai New Zealand	Papatowai New Zealand	Shipwrecks Bay-Peaks New Zealand	Shipwrecks Bay-Peaks New Zealand	Shipwreck Bay-Supertubes New Zealand	Cyclops Australia	Cyclops Australia	Ethel Wreck Australia	Shipwrecks Bay-Peaks New Zealand	Papatowai New Zealand	Easter Reef Australia	Easter Reef Australia	Easter Reef Australia	Easter Reef Australia	Quarantine Australia	Dunedin - Bobs Beach New Zealand	Trial Harbour Australia	Trial Harbour Australia	Papatowai New Zealand
Rating (10 max)	5	4	4	4	9	9	9	7	8	8	5	5	5	5	5	8	8	9	9	6	7	9	9	8

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

Latest Updates

Ben Mondy

Six Sun-Soaked Summer Surf Spots: Backed by 20 years of Swell and Wind Stats (and with our 20% Summer Subscription Sale)

Ben Mondy

Summer School: The Timeline of The Boardshort

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Dark Reef 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.

Dark Reef 48 hour detailed Surf Forecast

How big are the waves at Dark Reef today (20 Sep):

Short Range Forecast

Latest Updates

Road Testing the new Db Surf Roller Pro

Summer's Short. Life Is Long.

Roadsurfing in the Basque country

Six Sun-Soaked Summer Surf Spots: Backed by 20 years of Swell and Wind Stats (and with our 20% Summer Subscription Sale)

Summer School: The Timeline of The Boardshort

FREE! Surf-Forecast.com widget for your website