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Islita Surf Forecast
/ Guanacaste (28 surf breaks) /
Surf Forecasts:
Islita surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 5 am 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 9AM is: 0.7m 13s primary swell from a Southwest direction and 0.5m 8s secondary swell from a South direction (forecast issued at 05:00am May 18). An open ocean swell of 0.1m 6s is not directed at the surf break. The wind direction is predicted to be glassy and the swell rating is 2.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 2.5ft (0.7m) | 13s |
| Afternoon (18 May) | 2.5ft (0.7m) | 13s |
| Evening (18 May) | 2.5ft (0.7m) | 13s |
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 night. Warm (max 31°C on Mon morning, min 27°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 3 PM | 6 PM | 9 PM | 12 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 13 | SW 13 | SW 13 | SW 13 | 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 | |
178 | 175 | 175 | 178 | 178 | 154 | 178 | 202 | 246 | 152 | 109 | 109 | 164 | 188 | 314 | 310 | 371 | 206 | 208 | 206 | 261 | 208 | 302 | 191 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | glassy | on | on | glassy | glassy | glassy | off | cross-off | glassy | on | cross-on | cross-on | cross-off | off | off | off | glassy | on | cross-on | glassy | cross | on | |
High Tide | 3:26AM2.55m | 3:41PM2.86m | 4:17AM2.58m | 4:32PM2.80m | 5:09AM2.57m | 5:24PM2.69m | ||||||||||||||||||
Low Tide | 9:26AM0.14m | 10:04PM-0.09m | 10:18AM0.15m | 10:54PM-0.05m | 11:12AM0.21m | 11:47PM0.04m | ||||||||||||||||||
 |  | | | | | | | | | | | | | | | | | | |  |  | | | |
 | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | 5:18 |
 | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:55 | — | — | — | — | — | — | — | 5:55 | — | — | 5:55 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 4 | 1 | |
Temp °C | 27 | 27 | 29 | 31 | 31 | 30 | 29 | 28 | 27 | 27 | 29 | 31 | 30 | 29 | 29 | 28 | 27 | 27 | 30 | 31 | 30 | 29 | 27 | 27 |
31 | 31 | 33 | 33 | 33 | 34 | 34 | 33 | 31 | 31 | 33 | 33 | 34 | 33 | 33 | 31 | 30 | 30 | 34 | 33 | 34 | 33 | 30 | 32 | |
Swell 1 Height (m) Direction Period (s) | SW 13 | SW 13 | SW 13 | SW 13 | 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 |
 kJ | 178 | 175 | 175 | 178 | 178 | 154 | 178 | 114 | 246 | 103 | 103 | 103 | 164 | 167 | 314 | 310 | 371 | 206 | 208 | 206 | 261 | 208 | 302 | 191 |
Swell 2 Height (m) Direction Period (s) | S 6 | S 8 | S 8 | S 8 | SW 16 | 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 |
| kJ | 11 | 29 | 29 | 28 | 69 | 39 | 39 | 202 | 109 | 28 | 28 | 28 | 28 | 188 | 73 | 73 | 16 | 113 | 114 | 83 | 83 | 138 | 103 | 69 |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 18 | SW 18 | SW 17 | S 21 | 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 7 | S 7 | S 7 | SW 19 |
| kJ | 82 | 86 | 79 | 71 | 9 | 132 | 152 | 26 | 27 | 152 | 109 | 109 | 109 | 27 | 26 | 16 | 52 | 16 | 15 | 15 | 15 | 15 | 15 | 126 |
Wind waves Height (m) Direction Period (s) | — | — | N 6 | — | S 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | — | 40 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 0 | 0 | 39 | 57 | 30 | 0 | 0 | 0 | 0 | 0 | 56 | 64 | 0 | 14 | 14 |
Best forecast wave conditions in Guanacaste | ||||||||||||||||||||||||
Best forecast wave conditions in Costa Rica | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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