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:
San Juan surfForecast / Lanzarote / Spain
48hr Weather and Surf, issued 11 pm Tuesday 16 Dec 2025 WETForecast update in hr min s Forecast update imminent
San Juan surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's San Juan sea temperature is
20.3° C
(Which is normal for this time of year)How big are the waves at San Juan today?
The current surf forecast for San Juan at 6AM is: 3.5m 14s primary swell from a North-northwest direction and 1.3m 13s secondary swell from a West-northwest direction (forecast issued at 11:00pm December 16). The wind direction is predicted to be cross-onshore.
| Time (WET) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 11ft (3.5m) | 14s |
| Afternoon (17 Dec) | 7.5ft (2.3m) | 13s |
| Evening (17 Dec) | 7ft (2.1m) | 13s |
Table - waves today at San Juan. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| 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) (?) | 10 | 12 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 13 | 12 | 12 | 24 | 22 | 21 | 19 | 19 | 18 | 17 | 16 | 16 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1835 | 2601 | 5247 | 4960 | 4182 | 3788 | 1915 | 2103 | 1493 | 1325 | 923 | 848 | 797 | 784 | 972 | 1992 | 3459 | 3837 | 4724 | 3948 | 4020 | 3263 | 2794 | 1736 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | cross- on | on | on | on | on | on | on | on | on | on | on | on | cross- on | on | on | on | on | cross- on | on | on | cross- on |
High Tide / height (m) | 11:35PM 2.01 | 11:53AM 1.95 | 12:12AM 2.10 | 12:32PM 2.01 | 12:48AM 2.17 | 1:09PM 2.05 | ||||||||||||||||||
Low Tide / height (m) | 5:45AM 0.54 | 5:55PM 0.50 | 6:23AM 0.45 | 6:31PM 0.44 | 6:59AM 0.38 | |||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 7:41 | - | - | - | - | - | - | - | 7:41 | - | - | - | - | - | - | - | 7:41 | - | - | - |
| Sunset | - | - | - | - | - | - | 5:58 | - | - | - | - | - | - | - | 5:59 | - | - | - | - | - | - | - | 5:59 | - |
 |  | |  |  |  | | | | | | |  | | | | | | |  | | | | | |
Rain (mm) | - | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 |
| Feels °C (?) | 10 | 10 | 10 | 11 | 12 | 11 | 12 | 12 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 15 | 15 | 16 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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