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:
Oceano surfForecast / CAL – San Luis Obispo / USA
48hr Weather and Surf, issued 9 pm Monday 15 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Oceano surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Oceano sea temperature is
15.7° C
(Which is 1.6°C warmer than normal for this time of year)How big are the waves at Oceano today?
The current surf forecast for Oceano at 4AM is: 0.3m 16s primary swell from a Southwest direction and 0.5m 6s secondary swell from a West-northwest direction, 0.5m 9s secondary swell from a West direction (forecast issued at 09:00pm December 15). An open ocean swell of 0.2m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 2.5ft (0.7m) | 8s |
| Afternoon (16 Dec) | 4ft (1.2m) | 10s |
| Evening (16 Dec) | 5.5ft (1.7m) | 13s |
Table - waves today at Oceano. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 5 | 16 | 16 | 16 | 8 | 8 | 10 | 10 | 12 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 67 | 41 | 41 | 41 | 68 | 77 | 116 | 279 | 742 | 1025 | 1075 | 905 | 876 | 841 | 736 | 1102 | 488 | 827 | 723 | 639 | 617 | 560 | 478 | 947 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross | cross- on | cross | cross | cross | cross | cross | cross | cross- on | cross- on | cross | cross | cross | cross- off | cross | cross- off | cross- on | cross |
High Tide / height (m) | 8:14PM 1.40 | 6:54AM 2.07 | 9:04PM 1.44 | 7:25AM 2.12 | 9:46PM 1.47 | 7:59AM 2.15 | ||||||||||||||||||
Low Tide / height (m) | 12:28AM 1.13 | 2:22PM 0.35 | 1:06AM 1.18 | 2:57PM 0.26 | 1:44AM 1.22 | 3:33PM 0.20 | ||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:03 | - | - | - | - | - | - | - | 7:05 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 |
 | | | | |  | | | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 16 | 16 | 15 | 15 | 19 | 23 | 21 | 18 | 17 | 17 | 16 | 16 | 19 | 22 | 21 | 18 | 17 | 15 | 14 | 14 | 19 | 22 | 22 |
| Feels °C (?) | 13 | 12 | 12 | 11 | 11 | 15 | 18 | 17 | 14 | 13 | 14 | 12 | 13 | 16 | 19 | 19 | 16 | 16 | 13 | 12 | 12 | 16 | 18 | 18 |
- 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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