Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Dark Reef surfForecast / Khánh Hoà / Vietnam
48hr Weather and Surf, issued 12 am Saturday 20 Dec 2025 +07Forecast 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
25.5° C
(Which is normal for this time of year)How big are the waves at Dark Reef today?
The current surf forecast for Dark Reef at 3AM is: 1.6m 9s primary swell from a Northeast direction and 0.1m 8s secondary swell from a East direction (forecast issued at 12:00am December 20). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (+07) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Dec) | 5ft (1.6m) | 9s |
| Afternoon (20 Dec) | 5.5ft (1.7m) | 6s |
| Evening (20 Dec) | 5.5ft (1.7m) | 9s |
Table - waves today at Dark Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||||||||||
| 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 | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 9 | 9 | 9 | 9 | 9 | 6 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 8 | 8 | 9 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 450 | 429 | 408 | 427 | 437 | 486 | 225 | 380 | 454 | 360 | 294 | 254 | 254 | 254 | 294 | 302 | 274 | 594 | 671 | 687 | 816 | 853 | 911 | 872 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross | cross- off | cross- off | cross | cross | cross | cross | cross | cross |
High Tide / height (m) | 8:04PM 1.54 | 8:42PM 1.58 | 9:21PM 1.61 | |||||||||||||||||||||
Low Tide / height (m) | 5:15AM 0.07 | 5:52AM 0.05 | 6:30AM 0.05 | |||||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:56 | - | - | - | - | - | - | - | 5:58 | - | - | - | - | - | - | - | 5:58 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - |
 |  | |  | | | | | | | | |  | | | | |  |  |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 1 | 1 | 1 | - |
| Temp. °C | 23 | 23 | 22 | 23 | 26 | 27 | 26 | 24 | 23 | 23 | 22 | 22 | 26 | 27 | 26 | 25 | 24 | 23 | 24 | 24 | 25 | 26 | 25 | 24 |
| Feels °C (?) | 25 | 25 | 24 | 25 | 28 | 27 | 26 | 25 | 24 | 25 | 23 | 23 | 27 | 27 | 26 | 26 | 25 | 24 | 25 | 25 | 25 | 26 | 25 | 25 |
- 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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