Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Islita surfForecast / Guanacaste / Costa Rica
48hr Weather and Surf, issued 11 pm Friday 12 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
28.7° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Islita today?
The current surf forecast for Islita at 7AM is: 1.0m 7s primary swell from a South direction and 0.4m 11s secondary swell from a South-southwest direction (forecast issued at 11:00pm December 12). The wind direction is predicted to be cross-offshore.
| Time (CST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 3.5ft (1.0m) | 7s |
| Afternoon (13 Dec) | 3.5ft (1.0m) | 7s |
| Evening (13 Dec) | 2.5ft (0.7m) | 7s |
Table - waves today at Islita. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| 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) (?) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 16 | 16 | 16 | 7 | 7 | 7 | 7 | 6 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 77 | 79 | 103 | 106 | 106 | 103 | 100 | 97 | 51 | 84 | 84 | 84 | 84 | 82 | 82 | 79 | 60 | 75 | 104 | 75 | 75 | 76 | 77 | 36 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | glass | glass | glass | glass | glass | glass | off | cross- off | glass | glass | on | cross- on | glass | off | off | off | off | cross- off | glass | glass | cross- off |
High Tide / height (m) | 9:19AM 1.99 | 9:52PM 2.22 | 10:22AM 1.92 | 10:46PM 2.19 | 11:23AM 1.90 | |||||||||||||||||||
Low Tide / height (m) | 3:19AM 0.68 | 3:27PM 0.67 | 4:20AM 0.70 | 4:24PM 0.75 | 5:18AM 0.67 | 5:19PM 0.78 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| Sunrise | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - | - | - | - | - | - | 5:48 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - |
 |  | |  |  | | | | | | | | |  | | | | | | | | | | | |
Rain (mm) | 1 | - | - | 1 | - | 1 | 4 | 3 | 1 | - | - | - | - | - | 2 | 2 | - | - | - | - | - | - | - | - |
| Temp. °C | 27 | 26 | 26 | 25 | 27 | 27 | 27 | 26 | 25 | 25 | 24 | 24 | 26 | 28 | 27 | 26 | 25 | 25 | 24 | 24 | 26 | 28 | 28 | 26 |
| Feels °C (?) | 31 | 30 | 30 | 29 | 31 | 31 | 31 | 30 | 29 | 29 | 27 | 28 | 30 | 31 | 31 | 31 | 29 | 29 | 27 | 27 | 29 | 32 | 32 | 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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