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:
Browns surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 7 pm Tuesday 16 Dec 2025 HSTForecast update in hr min s Forecast update imminent
Browns surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Browns sea temperature is
26.1° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Browns today?
The current surf forecast for Browns at 1AM is: 1.0m 12s primary swell from a North direction and 0.4m 5s secondary swell from a Southwest direction (forecast issued at 07:00pm December 16). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 3.5ft (1.0m) | 13s |
| Afternoon (17 Dec) | 3ft (0.9m) | 13s |
| Evening (17 Dec) | 3.5ft (1.1m) | 13s |
Table - waves today at Browns. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 11 AM | 2 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 301 | 236 | 233 | 292 | 347 | 347 | 347 | 277 | 273 | 390 | 447 | 339 | 311 | 243 | 214 | 206 | 277 | 277 | 165 | 125 | 151 | 155 | 232 | 224 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | cross- off | glass | glass | cross- on | cross- on | cross- on | cross | cross | cross- on | glass | glass | on | cross- on | cross- on | glass | glass | glass | glass | glass | cross- on | cross- on |
High Tide / height (m) | 2:33AM 0.79 | 1:58PM 0.32 | 3:06AM 0.81 | 2:38PM 0.31 | 3:40AM 0.83 | |||||||||||||||||||
Low Tide / height (m) | 6:58PM 0.08 | 9:48AM 0.21 | 7:33PM 0.06 | 10:23AM 0.19 | 8:08PM 0.05 | 10:57AM 0.17 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:52 | - | - |
| Sunset | 5:46 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - | 5:46 | - | - | - | - | - | - | - |
 |  | | | |  | | | | | |  | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 24 | 25 | 24 | 24 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 24 | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 26 | 26 |
| Feels °C (?) | 28 | 29 | 28 | 28 | 27 | 27 | 28 | 27 | 27 | 28 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 28 | 28 |
- 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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