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Surf Forecasts:
Dark Reef surfForecast / Khánh Hoà / Vietnam
48hr Weather and Surf, issued 12 am Wednesday 20 May 2026 +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
30.5° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Dark Reef today?
The current surf forecast for Dark Reef at 6AM is: 0.5m 8s primary swell from a Northeast direction and 0.8m 4s secondary swell from a South direction (forecast issued at 12:00am May 20). The wind direction is predicted to be cross-offshore.
| Time (+07) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 1.5ft (0.5m) | 8s |
| Afternoon (20 May) | 3.5ft (1.0m) | 5s |
| Evening (20 May) | 3.5ft (1.0m) | 5s |
Table - waves today at Dark Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Wed afternoon. Warm (max 32°C on Wed morning, min 26°C on Tue night). Winds decreasing (fresh winds from the SSE on Wed morning, calm by Thu night). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 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 | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | S 5 | S 5 | S 5 | S 5 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | SSE 5 | S 4 | S 4 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | S 4 | |
43 | 42 | 33 | 31 | 30 | 54 | 61 | 49 | 34 | 33 | 26 | 21 | 21 | 24 | 35 | 26 | 17 | 13 | 13 | 13 | 13 | 13 | 12 | 10 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | cross-off | cross-off | |
High Tide | 10:39AM1.79m | 11:27AM1.74m | 12:16PM1.62m | |||||||||||||||||||||
Low Tide | 8:04PM-0.10m | 9:02PM-0.01m | 9:57PM0.12m | |||||||||||||||||||||
 | |  |  | |  | | | | | | | | |  |  | | | | | | | | | |
 | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — |
— | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 1 | — | |
Temp °C | 27 | 26 | 28 | 31 | 32 | 31 | 29 | 28 | 27 | 26 | 28 | 31 | 31 | 31 | 29 | 27 | 26 | 26 | 27 | 31 | 31 | 30 | 28 | 27 |
31 | 30 | 32 | 32 | 32 | 32 | 32 | 32 | 31 | 30 | 32 | 33 | 32 | 33 | 32 | 31 | 30 | 30 | 32 | 34 | 33 | 31 | 32 | 31 | |
Swell 1 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | SE 4 | NE 9 | NE 9 | NE 9 | NE 9 | ENE 9 |
 kJ | 43 | 42 | 33 | 31 | 30 | 30 | 21 | 22 | 22 | 20 | 20 | 21 | 21 | 21 | 21 | 13 | 13 | 13 | 4 | 13 | 13 | 13 | 12 | 8 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 9 | NE 9 | NE 9 | NE 9 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 13 | 13 | 13 | 13 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 5 | S 4 | S 4 | S 4 | SSE 4 | S 5 | S 5 | S 5 | S 5 | S 4 | S 4 | S 4 | SSE 4 | SSE 4 | SSE 5 | S 4 | S 4 | S 4 | SSW 4 | SSE 4 | SSE 4 | SSE 4 | SSE 4 | S 4 |
| kJ | 34 | 23 | 22 | 21 | 29 | 54 | 61 | 49 | 34 | 33 | 26 | 17 | 17 | 24 | 35 | 26 | 17 | 11 | 5 | 6 | 5 | 7 | 11 | 10 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 13 | 425 | 911 | 677 | 699 | 0 | 13 | 13 | 13 | 425 | 1282 | 455 | 425 | 425 | 13 | 425 | 425 | 425 | 911 | 911 | 425 | 425 |
Best forecast wave conditions in Khánh Hoà | ||||||||||||||||||||||||
Best forecast wave conditions in Vietnam | ||||||||||||||||||||||||
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