Dark Reef Surf Forecast

/ Khánh Hoà (2 surf breaks) /

Vietnam (11 surf breaks)

Surf Forecasts:

Dark Reef surfForecast / Khánh Hoà / Vietnam

12 Day Weather and Surf, issued 12 pm Thursday 18 Sep 2025 +07

Forecast update in hr min s Forecast update imminent

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

Today's Dark Reef sea temperature is 29.6° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Dark Reef this week:

The surf forecast for Dark Reef over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 23) at 10PM. The primary swell is predicted to be 0.3m and 20s period. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Dark Reef in the next 12 days are 1.6m 15s and forecast to arrive on Wednesday (Sep 24) at 10PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 8s period and expected on Thursday (Sep 25) at 4AM.

Wave Type	Time (+07) & Date	Wave Height & Period
Next good surf (1 star+)	10PM (Tue 23rd Sep)	1ft (0.3m) 20s
Best Surf	10PM (Wed 24th Sep)	5ft (1.6m) 15s
Most Powerful	10PM (Wed 24th Sep)	5ft (1.6m) 15s

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

Updates in hr min s Forecast update imminent

12 Days Hourly

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	Short Range Forecast Heavy rain (total 21mm), heaviest during Thu night. Warm (max 30°C on Sat morning, min 25°C on Fri night). Wind will be generally light.									Days 3-6 Weather Summary Heavy rain (total 31mm), heaviest during Sun afternoon. Warm (max 30°C on Sun morning, min 25°C on Mon night). Wind will be generally light.
	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	3	3	4
Swell Height Map See all maps
Wave Height (m) & direction (?)	NE	NE	NE	NE	NE	NE	NE	NE	NE	NNE	NNE	E	E	E	SSW	E	NE	ENE	ENE	NE	NE
Period(s) (?)	8	7	7	7	7	7	9	8	7	7	7	12	12	12	6	11	17	20	16	15	14
Wave Graph (?)
kJ (?)	36	34	25	25	18	19	31	24	9	5	5	3	3	3	0	2	12	154	808	955	1109
Wind (km/h)	SE	SE	WNW	SSW	SSE	W	SE	SE	WNW	S	SE	W	SSW	SE	W	SW	SSE	W	WSW	SW	W
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	glass	cross- on	cross- off	cross- off	cross- on	off	glass	cross- on	cross- off	glass	cross- on	off	glass	glass	off	glass	cross	off	off	cross- off	off
High Tide / height (m)				6:44AM 1.42			7:55AM 1.39		11:15PM 0.97	8:56AM 1.34		10:54PM 1.00	9:51AM 1.27		10:48PM 1.06	10:45AM 1.18		10:50PM 1.14	11:41AM 1.09		10:56PM 1.23
Low Tide / height (m)					3:36PM 0.23			4:05PM 0.32	2:32AM 0.91		4:28PM 0.43	3:37AM 0.79		4:44PM 0.56		4:30AM 0.66	4:54PM 0.68		5:17AM 0.55	4:57PM 0.78

	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
Sunrise	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-	5:31	-	-
Sunset	-	5:42	-	-	5:40	-	-	5:40	-	-	5:39	-	-	5:38	-	-	5:38	-	-	5:37	-

Rain (mm)	1	8	8	2	1	-	-	1	-	1	10	6	1	4	2	2	4	1	-	-	-
Temp. °C	29	28	27	29	29	26	30	29	27	30	29	26	29	27	26	29	29	26	30	30	26
Feels °C (?)	33	32	32	33	33	30	34	32	31	34	33	31	33	32	30	33	33	29	33	33	28

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 Khánh Hoà

Wind Update The wind is still cross-on at Dark Reef (light winds from the SE at Nha Trang 10 km from Dark Reef). 0.5m 7s swell from the NE with a 0.3m 4s local chop from the NNE. 2 swells combining to make bigger set waves.
2 hours 48 minutes ago Dark Reef

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2 h 48 min ago

14 km/h

Cross-On

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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.

Information about the Dark Reef Surf forecast

The above surf forecast table for Dark Reef provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Dark Reef can be found by selecting the local surf guide option on the grey menu. Our Dark Reef 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 (Dark Reef) 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 Dark Reef 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.

Dark Reef is 10 km (6 miles) from the city of Nhatrang. If you plan a holiday in Khánh Hoà, look for hotels and other accommodation in Nhatrang. Nhatrang has rooms for a wide range of budgets as well as car hire and transport links.