Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Islita surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 11 pm Sunday 21 Dec 2025 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
28.4° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Islita today?
The current surf forecast for Islita at 6AM is: 0.8m 11s primary swell from a South direction and 0.4m 14s secondary swell from a Southwest direction (forecast issued at 11:00pm December 21). An open ocean swell of 0.1m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Dec) | 2.5ft (0.8m) | 11s |
| Afternoon (22 Dec) | 2.5ft (0.8m) | 11s |
| Evening (22 Dec) | 2.5ft (0.7m) | 11s |
Table - waves today at Islita. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 22 | Tuesday 23 | Wednesday 24 | ||||||||||||||||||||||
| 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 152 | 152 | 152 | 152 | 149 | 149 | 146 | 110 | 108 | 106 | 104 | 104 | 104 | 104 | 102 | 102 | 169 | 130 | 102 | 99 | 91 | 88 | 87 | 85 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- on | glass | glass | cross- off | off | off | glass | glass | glass | glass | glass | off | off | off | off | on | cross- on | glass |
High Tide / height (m) | 3:53AM 2.40 | 4:29PM 2.24 | 4:31AM 2.38 | 5:07PM 2.27 | 5:09AM 2.34 | 5:44PM 2.29 | ||||||||||||||||||
Low Tide / height (m) | 9:45PM 0.55 | 10:15AM 0.29 | 10:24PM 0.56 | 10:51AM 0.30 | 11:04PM 0.57 | 11:27AM 0.34 | ||||||||||||||||||
Monday 22 | Tuesday 23 | Wednesday 24 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:52 | - | - | - | - | - | - | - | 5:54 | - | - | - | - | - | - | - | 5:54 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:25 | - | - | - | - | - | - | - | 5:27 | - | - | - | - | - | - | - | 5:27 | - |
 | | |  | | | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 24 | 24 | 23 | 26 | 28 | 28 | 26 | 25 | 24 | 24 | 23 | 26 | 28 | 28 | 26 | 25 | 24 | 24 | 23 | 26 | 28 | 28 | 26 |
| Feels °C (?) | 29 | 26 | 27 | 25 | 28 | 30 | 30 | 29 | 29 | 27 | 27 | 26 | 29 | 31 | 30 | 29 | 28 | 27 | 27 | 25 | 29 | 30 | 30 | 29 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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