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:
Rockpiles surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Saturday 13 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Rockpiles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rockpiles sea temperature is
25.9° C
(Which is slightly warmer than usual)How big are the waves at Rockpiles today?
The current surf forecast for Rockpiles at 8PM is: 0.9m 5s primary swell from a South-southwest direction and 0.4m 8s secondary swell from a East direction (forecast issued at 01:00pm December 13). An open ocean swell of 0.8m 11s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 1.5ft (0.5m) | 8s |
| Afternoon (13 Dec) | 3ft (0.9m) | 4s |
| Evening (13 Dec) | 3ft (0.9m) | 5s |
Table - waves today at Rockpiles. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 4 | 4 | 5 | 5 | 6 | 5 | 4 | 4 | 7 | 14 | 4 | 4 | 13 | 4 | 4 | 8 | 8 | 4 | 4 | 5 | 5 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 28 | 28 | 29 | 37 | 47 | 40 | 57 | 10 | 6 | 71 | 0 | 6 | 6 | 0 | 6 | 4 | 10 | 10 | 18 | 15 | 22 | 27 | 69 | 73 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | cross- on | on | on | cross- on | cross- on | on | on | cross- on | on | on |
High Tide / height (m) | 10:54AM 0.36 | 1:13AM 0.51 | 11:45AM 0.30 | 1:48AM 0.57 | 12:35PM 0.25 | 2:20AM 0.62 | ||||||||||||||||||
Low Tide / height (m) | 5:46PM 0.02 | 7:46AM 0.23 | 6:12PM 0.02 | 8:52AM 0.20 | 6:39PM 0.01 | |||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:01 |
| Sunset | - | - | 5:51 | - | - | - | - | - | - | - | 5:51 | - | - | - | - | - | - | - | 5:51 | - | - | - | - | - |
 | | |  | | | |  | |  | | |  | | | | | | |  | | | | | |
Rain (mm) | - | - | - | 1 | 1 | 1 | 1 | - | - | 1 | 2 | 1 | - | 1 | 1 | 1 | 4 | 1 | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 23 | 24 | 24 | 24 | 25 | 24 | 25 | 24 | 24 | 24 |
| Feels °C (?) | 22 | 23 | 23 | 24 | 25 | 24 | 25 | 26 | 27 | 25 | 26 | 26 | 26 | 26 | 23 | 26 | 27 | 25 | 26 | 24 | 26 | 26 | 26 | 25 |
- 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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