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:
Diamond Street surfForecast / CAL – San Diego County / USA
48hr Weather and Surf, issued 3 pm Saturday 13 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Diamond Street surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Diamond Street sea temperature is
17.0° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Diamond Street today?
The current surf forecast for Diamond Street at 8PM is: 0.5m 13s primary swell from a West direction and 0.3m 11s secondary swell from a South-southwest direction (forecast issued at 03:00pm December 13). The wind direction is predicted to be cross-shore.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 1.5ft (0.5m) | 13s |
| Evening (13 Dec) | 1.5ft (0.5m) | 13s |
Table - waves today at Diamond Street. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 13 | 12 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 16 | 16 | 16 | 16 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 89 | 87 | 86 | 84 | 51 | 54 | 75 | 104 | 75 | 54 | 54 | 53 | 47 | 46 | 62 | 45 | 45 | 44 | 27 | 41 | 41 | 41 | 41 | 23 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross | cross | cross | cross | cross | cross | cross- on | cross | cross | cross | cross | cross- off | cross | cross | cross- on | cross- on | cross | glass | glass | cross- off | glass | glass |
High Tide / height (m) | 5:09PM 1.03 | 5:19AM 1.62 | 6:20PM 1.02 | 5:50AM 1.69 | 7:16PM 1.03 | 6:19AM 1.75 | ||||||||||||||||||
Low Tide / height (m) | 11:52AM 0.41 | 10:53PM 0.48 | 12:41PM 0.23 | 11:33PM 0.58 | 1:21PM 0.08 | 12:10AM 0.65 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - |
| Sunset | - | 4:43 | - | - | - | - | - | - | - | 4:44 | - | - | - | - | - | - | - | 4:44 | - | - | - | - | - | - |
 | |  | | |  |  | | |  | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 14 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 16 | 17 | 17 | 18 | 19 | 18 | 18 | 18 | 19 | 19 | 19 | 20 |
| Feels °C (?) | 13 | 13 | 13 | 14 | 14 | 16 | 15 | 16 | 16 | 16 | 17 | 16 | 15 | 17 | 16 | 17 | 17 | 17 | 17 | 17 | 18 | 17 | 17 | 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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