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Diria Surf Forecast
/ Guanacaste (28 surf breaks) /
Surf Forecasts:
Diria surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 5 pm Wednesday 20 May 2026 CSTForecast update in hr min s Forecast update imminent
Diria surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Diria sea temperature is
30.1° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Diria today?
The current surf forecast for Diria at 1AM is: 0.7m 15s primary swell from a Southwest direction and 0.5m 12s secondary swell from a Southwest direction (forecast issued at 05:00pm May 20). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 2.5ft (0.8m) | 15s |
| Afternoon (21 May) | 2.5ft (0.8m) | 15s |
| Evening (21 May) | 3ft (0.9m) | 15s |
Table - waves today at Diria. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 33°C on Wed afternoon, min 27°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | |
306 | 306 | 302 | 229 | 266 | 266 | 266 | 266 | 266 | 318 | 365 | 314 | 258 | 255 | 251 | 248 | 248 | 241 | 234 | 234 | 234 | 197 | 228 | 153 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | off | cross-on | cross-on | cross | cross-off | cross-off | off | cross-off | cross-off | cross-on | cross-on | cross | cross-off | cross-off | glassy | cross-off | cross-off | on | |
High Tide | 5:23PM2.59m | 6:02AM2.40m | 6:18PM2.44m | 6:59AM2.34m | 7:16PM2.28m | 7:59AM2.27m | ||||||||||||||||||
Low Tide | 11:46PM0.04m | 12:07PM0.30m | 00:40AM0.16m | 1:08PM0.42m | 1:37AM0.29m | |||||||||||||||||||
 |  |  | | |  | | | |  | | | | | |  | | | | | | | | | |
 | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — |
 | 5:58 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:59 | — | — | — | — | — | — | 5:59 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 33 | 31 | 29 | 28 | 27 | 27 | 31 | 33 | 31 | 30 | 30 | 29 | 27 | 27 | 30 | 31 | 30 | 29 | 29 | 28 | 28 | 27 | 30 | 30 |
35 | 30 | 29 | 28 | 28 | 27 | 31 | 36 | 32 | 32 | 33 | 33 | 31 | 30 | 32 | 33 | 32 | 31 | 32 | 32 | 33 | 30 | 34 | 32 | |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | S 8 | S 8 | S 8 | S 8 | S 9 |
 kJ | 306 | 306 | 302 | 229 | 266 | 266 | 266 | 266 | 266 | 318 | 365 | 314 | 258 | 255 | 251 | 248 | 248 | 241 | 234 | 74 | 72 | 93 | 76 | 96 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 11 | S 7 | S 7 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 |
| kJ | 113 | 109 | 71 | 69 | 69 | 67 | 65 | 63 | 60 | 30 | 15 | 26 | 28 | 29 | 41 | 42 | 44 | 43 | 60 | 234 | 234 | 197 | 228 | 153 |
Swell 3 Height (m) Direction Period (s) | S 7 | N 5 | NNE 5 | SW 19 | S 7 | S 7 | S 7 | NNE 5 | SSW 7 | S 7 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | S 10 | SW 10 | SW 10 | SW 10 | SSW 10 | SW 17 |
| kJ | 16 | 7 | 7 | 126 | 8 | 8 | 8 | 4 | 15 | 15 | 30 | 29 | 29 | 28 | 27 | 26 | 25 | 25 | 19 | 15 | 15 | 15 | 9 | 71 |
Wind waves Height (m) Direction Period (s) | N 5 | — | — | NE 3 | NE 3 | NE 3 | NNE 3 | — | — | — | — | — | — | NW 8 | NW 8 | N 8 | NNW 2 | — | — | — | — | — | — | — |
| kJ | 11 | — | — | 4 | 4 | 3 | 4 | — | — | — | — | — | — | 2 | 3 | 1 | 1 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 6 | 59 | 33 | 0 | 0 | 0 | 0 | 0 | 9 | 9 | 130 | 0 | 0 | 0 | 0 | 0 | 9 |
Best forecast wave conditions in Guanacaste | ||||||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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