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Surf Forecasts:
Dark Reef surfForecast / Khánh Hoà / Vietnam
48hr Weather and Surf, issued 6 am Monday 18 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
30.0° C
(Which is slightly warmer than usual)How big are the waves at Dark Reef today?
The current surf forecast for Dark Reef at 1PM is: 0.8m 4s primary swell from a South direction and 0.2m 9s secondary swell from a North-northeast direction, 0.1m 11s secondary swell from a East direction (forecast issued at 06:00am May 18). The wind direction is predicted to be cross-onshore.
| Time (+07) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 4s |
| Afternoon (18 May) | 3.5ft (1.0m) | 4s |
| Evening (18 May) | 4ft (1.2m) | 5s |
Table - waves today at Dark Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 12mm), heaviest on Mon afternoon. Warm (max 31°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 4 | S 4 | S 4 | S 4 | S 5 | S 5 | S 5 | S 5 | NE 9 | NE 9 | NE 9 | NE 9 | S 6 | S 6 | S 6 | NE 8 | NE 8 | S 5 | S 5 | S 5 | S 6 | S 6 | S 5 | S 5 | |
15 | 16 | 15 | 22 | 53 | 75 | 61 | 42 | 54 | 51 | 50 | 49 | 141 | 144 | 116 | 34 | 33 | 59 | 62 | 131 | 166 | 158 | 112 | 71 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-on | cross-on | cross | cross | cross-off | off | glassy | glassy | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | cross | cross-off | cross-off | cross-off | |
High Tide | 9:13AM1.73m | 9:54AM1.79m | 10:39AM1.79m | |||||||||||||||||||||
Low Tide | 6:11PM-0.13m | 7:07PM-0.15m | 8:04PM-0.10m | |||||||||||||||||||||
 |  |  | |  |  | | | | | | | | | | | | | | | |  | | | |
 | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | 5:18 |
 | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | 6:00 |
— | — | — | — | 2 | 2 | 2 | — | — | — | — | — | 2 | 1 | — | — | 1 | 1 | — | — | 1 | — | — | — | |
Temp °C | 26 | 27 | 30 | 31 | 30 | 28 | 27 | 26 | 26 | 27 | 30 | 31 | 30 | 29 | 28 | 27 | 27 | 28 | 31 | 31 | 30 | 29 | 28 | 28 |
28 | 30 | 32 | 31 | 32 | 30 | 31 | 30 | 31 | 32 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 32 | 33 | 32 | 32 | 32 | 31 | 32 | |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 10 | NE 10 | NNE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 9 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 |
 kJ | 3 | 4 | 4 | 8 | 11 | 18 | 24 | 24 | 54 | 51 | 50 | 49 | 47 | 45 | 44 | 34 | 33 | 33 | 23 | 22 | 22 | 23 | 17 | 18 |
Swell 2 Height (m) Direction Period (s) | N 10 | NE 9 | NE 9 | E 11 | E 11 | E 11 | — | NE 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 3 | 3 | 2 | 2 | 2 | — | 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | E 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 4 | S 4 | S 4 | S 4 | S 5 | S 5 | S 5 | S 5 | S 5 | S 5 | S 5 | S 4 | S 6 | S 6 | S 6 | S 5 | S 5 | S 5 | S 5 | S 5 | S 6 | S 6 | S 5 | S 5 |
| kJ | 15 | 16 | 15 | 22 | 53 | 75 | 61 | 42 | 27 | 21 | 15 | 40 | 141 | 144 | 116 | 74 | 60 | 59 | 62 | 131 | 166 | 158 | 112 | 71 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 425 | 425 | 1282 | 1289 | 1289 | 425 | 0 | 0 | 0 | 0 | 425 | 1395 | 1395 | 425 | 0 | 425 | 425 | 0 | 425 | 911 | 699 | 0 | 0 | 0 |
Best forecast wave conditions in Khánh Hoà | ||||||||||||||||||||||||
Best forecast wave conditions in Vietnam | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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