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Surf Forecasts:
Dewata surfForecast / West / Sri Lanka
48hr Weather and Surf, issued 4 am Monday 18 May 2026 +0530Forecast update in hr min s Forecast update imminent
Dewata surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Dewata sea temperature is
29.3° C
(Which is normal for this time of year)How big are the waves at Dewata today?
The current surf forecast for Dewata at 9AM is: 1.2m 11s primary swell from a South direction and 0.4m 18s secondary swell from a South-southwest direction, 0.8m 6s secondary swell from a West-southwest direction (forecast issued at 04:30am May 18). The wind direction is predicted to be onshore.
| Time (+0530) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 4ft (1.2m) | 11s |
| Afternoon (18 May) | 4ft (1.2m) | 11s |
| Evening (18 May) | 4ft (1.2m) | 11s |
Table - waves today at Dewata. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 34mm), heaviest during Mon morning. Warm (max 29°C on Wed morning, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SW 11 | S 11 | S 11 | S 11 | S 11 | SSW 11 | SSW 11 | SSW 11 | SSW 7 | SSW 12 | SSW 12 | S 12 | S 12 | SSW 16 | SSW 16 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 15 | SSW 14 | SSW 14 | S 13 | SSW 13 | |
615 | 338 | 332 | 326 | 326 | 337 | 337 | 359 | 131 | 514 | 599 | 403 | 316 | 220 | 322 | 258 | 201 | 239 | 301 | 272 | 186 | 178 | 366 | 299 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 3:00AM0.50m | 3:22PM0.66m | 3:38AM0.49m | 3:58PM0.62m | 4:19AM0.47m | 4:33PM0.57m | ||||||||||||||||||
Low Tide | 8:38AM0.02m | 9:31PM0.05m | 9:17AM0.04m | 10:08PM0.06m | 9:57AM0.08m | 10:47PM0.08m | ||||||||||||||||||
 | |  | | | | | | | | | | | | | | | | | | | |  | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — |
 | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — | — | 6:16 | — | — |
2 | 2 | 4 | 3 | 3 | 3 | 2 | 1 | 1 | 3 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | |
Temp °C | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 29 | 29 | 28 | 28 | 28 |
30 | 31 | 30 | 30 | 30 | 30 | 31 | 30 | 28 | 28 | 30 | 30 | 30 | 31 | 31 | 31 | 29 | 30 | 30 | 30 | 30 | 29 | 30 | 30 | |
Swell 1 Height (m) Direction Period (s) | SSW 11 | S 11 | S 11 | S 11 | S 11 | SSW 11 | SSW 11 | SSW 11 | SSW 7 | SSW 12 | SSW 12 | S 12 | S 12 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | S 10 | SSW 14 | S 10 | SSW 14 | S 10 | S 13 | WSW 6 |
 kJ | 415 | 338 | 332 | 326 | 326 | 337 | 337 | 359 | 131 | 514 | 599 | 403 | 316 | 99 | 99 | 75 | 72 | 131 | 301 | 128 | 186 | 98 | 366 | 103 |
Swell 2 Height (m) Direction Period (s) | W 6 | SSW 18 | SSW 18 | SSW 14 | SSW 16 | SSW 16 | SSW 16 | SW 16 | S 12 | SSW 17 | SSW 18 | SSW 18 | SSW 18 | S 11 | S 11 | S 11 | S 10 | SSW 14 | S 10 | SSW 15 | S 10 | SSW 14 | SSW 18 | SSW 13 |
| kJ | 49 | 123 | 121 | 62 | 102 | 102 | 100 | 124 | 77 | 200 | 176 | 178 | 120 | 198 | 192 | 146 | 136 | 239 | 98 | 272 | 98 | 178 | 178 | 299 |
Swell 3 Height (m) Direction Period (s) | SW 18 | S 14 | S 14 | SW 17 | S 14 | S 13 | S 17 | S 17 | SW 16 | S 16 | SW 14 | S 16 | S 16 | SSW 16 | SSW 16 | SW 16 | SSW 15 | W 9 | W 9 | SSW 18 | SSW 18 | SSW 18 | W 8 | SSW 18 |
| kJ | 83 | 34 | 33 | 77 | 32 | 32 | 51 | 50 | 124 | 82 | 54 | 79 | 79 | 220 | 322 | 258 | 201 | 13 | 14 | 66 | 124 | 123 | 5 | 121 |
Wind waves Height (m) Direction Period (s) | SW 11 | WSW 6 | W 6 | WSW 6 | WSW 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | WSW 6 | WSW 6 | — | — | — | — | WSW 6 | SW 6 | WSW 6 | WSW 6 | WSW 6 | WSW 6 | W 6 |
| kJ | 615 | 48 | 46 | 60 | 60 | 41 | 54 | 41 | 54 | 54 | 59 | 95 | 103 | — | — | — | — | 70 | 77 | 90 | 90 | 96 | 96 | 88 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 866 | 961 | 1051 | 1985 | 2003 | 2033 | 1051 | 1001 | 1144 | 202 | 202 | 202 | 762 | 661 | 762 | 202 | 202 | 202 | 202 | 195 | 195 | 195 | 202 | 201 |
Best forecast wave conditions in West Sri Lanka | ||||||||||||||||||||||||
Best forecast wave conditions in Sri Lanka | ||||||||||||||||||||||||
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