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:
Bellows surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Monday 15 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Bellows surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Bellows sea temperature is
25.7° C
(Which is slightly warmer than usual)How big are the waves at Bellows today?
The current surf forecast for Bellows at 6AM is: 1.2m 13s primary swell from a North direction and 1.1m 14s secondary swell from a Northwest direction (forecast issued at 01:00am December 15). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 5ft (1.5m) | 15s |
| Afternoon (15 Dec) | 6ft (1.9m) | 14s |
| Evening (15 Dec) | 6ft (1.8m) | 14s |
Table - waves today at Bellows. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| 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) (?) | 13 | 13 | 13 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 628 | 495 | 492 | 811 | 1555 | 1509 | 1447 | 1407 | 1245 | 1048 | 888 | 861 | 723 | 667 | 563 | 336 | 572 | 569 | 586 | 499 | 413 | 407 | 331 | 321 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross | cross | cross- off | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 1:22AM 0.54 | 10:07AM 0.35 | 1:49AM 0.59 | 10:42AM 0.33 | 2:16AM 0.62 | 11:22AM 0.31 | ||||||||||||||||||
Low Tide / height (m) | 7:23AM 0.29 | 5:39PM -0.03 | 8:16AM 0.27 | 6:06PM -0.05 | 8:52AM 0.25 | 6:36PM -0.07 | ||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - |
| Sunset | - | - | - | - | - | - | 5:51 | - | - | - | - | - | - | - | 5:51 | - | - | - | - | - | - | - | 5:52 | - |
 | | |  | | | |  |  | | |  | |  |  | | |  | | | | | | | |
Rain (mm) | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | - | - | - | 1 | 1 | 1 | 1 |
| Temp. °C | 24 | 24 | 23 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 |
| Feels °C (?) | 26 | 25 | 24 | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 26 | 27 | 25 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 24 | 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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