Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
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Surf Forecasts:
H-Reef surfForecast / HAW – Maui / USA
48hr Weather and Surf, issued 1 am Tuesday 16 Dec 2025 HSTForecast update in hr min s Forecast update imminent
H-Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's H-Reef sea temperature is
25.6° C
(Which is slightly warmer than usual)How big are the waves at H-Reef today?
The current surf forecast for H-Reef at 4AM is: 1.5m 14s primary swell from a North direction and 0.9m 12s secondary swell from a Northwest direction (forecast issued at 01:00am December 16). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | 5ft (1.5m) | 13s |
| Afternoon (16 Dec) | 4.5ft (1.4m) | 12s |
| Evening (16 Dec) | 4.5ft (1.3m) | 12s |
Table - waves today at H-Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| 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) (?) | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 15 | 14 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 932 | 946 | 796 | 772 | 653 | 594 | 420 | 413 | 563 | 577 | 586 | 492 | 485 | 407 | 376 | 437 | 479 | 353 | 294 | 334 | 501 | 808 | 949 | 880 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- off | glass | glass | cross | glass | glass | off | off | cross- off | off | off | cross- off | off | off | cross- off | off | off | off | off | glass | glass | glass | glass |
High Tide / height (m) | 1:19AM 0.83 | 11:16AM 0.51 | 1:49AM 0.87 | 11:59AM 0.49 | 2:20AM 0.91 | 12:38PM 0.49 | ||||||||||||||||||
Low Tide / height (m) | 8:04AM 0.46 | 6:05PM 0.11 | 8:40AM 0.43 | 6:37PM 0.08 | 9:12AM 0.42 | 7:11PM 0.05 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:54 | - | - | - | - | - | - | - | 6:54 | - | - | - | - | - | - | - | 6:56 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - |
 |  | |  | |  | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 24 | 24 | 24 | 24 | 25 | 26 | 26 | 24 | 24 | 24 | 24 | 24 | 26 | 26 | 26 | 24 | 24 | 24 | 24 | 24 | 26 | 26 | 26 | 25 |
| Feels °C (?) | 26 | 27 | 27 | 28 | 28 | 30 | 30 | 27 | 26 | 24 | 24 | 25 | 27 | 27 | 28 | 26 | 25 | 25 | 25 | 26 | 29 | 29 | 29 | 29 |
- 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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