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Islita Surf Forecast
/ Guanacaste (28 surf breaks) /
Surf Forecasts:
Islita surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 5 pm Monday 18 May 2026 CSTForecast update in hr min s Forecast update imminent
Islita surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Islita sea temperature is
30.6° C
(Which is 1.7°C warmer than normal for this time of year)How big are the waves at Islita today?
The current surf forecast for Islita at 2AM is: 0.6m 18s primary swell from a Southwest direction and 0.6m 13s secondary swell from a South-southwest direction (forecast issued at 05:00pm May 18). The wind direction is predicted to be offshore and the swell rating is 2.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 1.5ft (0.4m) | 18s |
| Afternoon (19 May) | 2ft (0.6m) | 14s |
| Evening (19 May) | 2.5ft (0.8m) | 16s |
Table - waves today at Islita. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 9mm), mostly falling on Wed afternoon. Warm (max 31°C on Mon afternoon, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 13 | SSW 13 | SW 13 | SSW 17 | SW 18 | SW 18 | SW 18 | SW 18 | SW 14 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | |
178 | 154 | 178 | 202 | 246 | 152 | 109 | 109 | 164 | 188 | 314 | 310 | 371 | 206 | 208 | 206 | 261 | 208 | 302 | 233 | 269 | 262 | 266 | 266 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | glassy | off | off | cross-off | glassy | on | cross-on | glassy | glassy | off | off | off | cross-off | on | cross-on | cross | cross-on | cross-off | off | glassy | glassy | on | |
High Tide | 3:41PM2.86m | 4:17AM2.58m | 4:32PM2.80m | 5:09AM2.57m | 5:24PM2.69m | 6:04AM2.52m | ||||||||||||||||||
Low Tide | 10:04PM-0.09m | 10:18AM0.15m | 10:54PM-0.05m | 11:12AM0.21m | 11:47PM0.04m | |||||||||||||||||||
 |  |  | | | | |  | | |  | | | | | |  | | |  | |  | | | |
 | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — |
 | 5:54 | — | — | — | — | — | — | — | 5:55 | — | — | — | — | — | — | — | 5:55 | — | — | — | — | — | — | 5:55 |
— | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 3 | 3 | 2 | — | — | — | — | — | |
Temp °C | 31 | 30 | 29 | 28 | 27 | 27 | 30 | 31 | 30 | 29 | 29 | 28 | 27 | 27 | 30 | 31 | 30 | 29 | 27 | 27 | 27 | 27 | 29 | 31 |
33 | 35 | 34 | 32 | 31 | 31 | 34 | 33 | 33 | 34 | 34 | 31 | 30 | 30 | 33 | 33 | 34 | 33 | 30 | 31 | 31 | 32 | 33 | 34 | |
Swell 1 Height (m) Direction Period (s) | SW 13 | SSW 13 | SW 13 | SSW 13 | SW 18 | SSW 12 | SSW 12 | SSW 12 | SW 14 | SW 14 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 |
 kJ | 178 | 154 | 178 | 114 | 246 | 103 | 103 | 103 | 164 | 167 | 314 | 310 | 371 | 206 | 208 | 206 | 261 | 208 | 302 | 233 | 269 | 262 | 266 | 266 |
Swell 2 Height (m) Direction Period (s) | S 8 | S 7 | S 7 | SSW 17 | SSW 13 | S 8 | S 8 | S 8 | S 8 | SW 17 | SW 12 | SW 12 | S 7 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 13 | SSW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 |
| kJ | 40 | 39 | 39 | 202 | 109 | 28 | 28 | 28 | 28 | 188 | 73 | 73 | 16 | 113 | 114 | 83 | 83 | 138 | 103 | 69 | 68 | 66 | 65 | 61 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 18 | S 7 | S 7 | SW 18 | SW 18 | SW 18 | SW 18 | S 7 | S 7 | S 7 | SSW 16 | S 7 | S 7 | S 7 | S 12 | S 7 | S 7 | SW 19 | S 7 | S 7 | S 7 | S 7 |
| kJ | 69 | 132 | 152 | 26 | 27 | 152 | 109 | 109 | 109 | 27 | 27 | 16 | 52 | 16 | 15 | 15 | 11 | 15 | 15 | 126 | 8 | 15 | 8 | 8 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 7 | — | — | — | — | — | N 9 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 25 | — | — | — | — | — | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 39 | 33 | 0 | 0 | 0 | 0 | 0 | 39 | 109 | 0 | 0 | 0 | 0 | 0 | 0 | 57 | 64 | 14 | 39 | 0 | 0 | 0 | 0 | 36 |
Best forecast wave conditions in Guanacaste | ||||||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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