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:
Grandma's surfForecast / HAW – Maui / USA
48hr Weather and Surf, issued 1 am Friday 12 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Grandma's surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Grandma's sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Grandma's today?
The current surf forecast for Grandma's at 6AM is: 0.4m 13s primary swell from a South-southwest direction (forecast issued at 01:00am December 12). An open ocean swell of 0.7m 12s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Dec) | 1.5ft (0.4m) | 13s |
| Afternoon (12 Dec) | 1ft (0.3m) | 13s |
| Evening (12 Dec) | 1.5ft (0.5m) | 11s |
Table - waves today at Grandma's. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| 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 | 11 AM | 2 PM | 5 PM | 8 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 13 | 13 | 13 | 13 | 11 | 11 | 11 | 10 | 10 | 12 | 12 | 12 | 12 | 15 | 15 | 15 | 15 | 15 | 16 | 15 | 11 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 209 | 205 | 59 | 58 | 34 | 34 | 58 | 57 | 55 | 54 | 36 | 28 | 28 | 28 | 28 | 17 | 17 | 43 | 42 | 42 | 39 | 34 | 43 | 73 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | cross | glass | cross- on | cross- on | cross | cross | 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 | cross- on | cross- on | cross- on |
High Tide / height (m) | 10:58PM 0.42 | 10:05AM 0.51 | 11:54PM 0.50 | 10:58AM 0.44 | 12:42AM 0.58 | 11:50AM 0.38 | ||||||||||||||||||
Low Tide / height (m) | 3:42AM 0.25 | 4:45PM 0.03 | 5:21AM 0.26 | 5:18PM 0.02 | 6:53AM 0.24 | 5:51PM 0.00 | ||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:54 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:45 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - |
 |  |  |  | |  | | | | | | | | | | |  | | | | | | | | |
Rain (mm) | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | - | - | - | - | - |
| Temp. °C | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 24 |
| Feels °C (?) | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 23 | 22 | 24 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 27 | 25 | 26 | 27 | 27 |
- 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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