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:
Praia dos Castelhanos (Ilha Bela) surfForecast / São Paulo / Brazil
48hr Weather and Surf, issued 8 pm Friday 12 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Praia dos Castelhanos (Ilha Bela) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Praia dos Castelhanos (Ilha Bela) sea temperature is
25.5° C
(Which is slightly warmer than usual)How big are the waves at Praia dos Castelhanos (Ilha Bela) today?
The current surf forecast for Praia dos Castelhanos (Ilha Bela) at 1AM is: 1.0m 11s primary swell from a South direction and 0.4m 4s secondary swell from a East-southeast direction, 0.6m 4s secondary swell from a East direction (forecast issued at 08:00pm December 12). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 3ft (0.9m) | 10s |
| Afternoon (13 Dec) | 2.5ft (0.8m) | 10s |
| Evening (13 Dec) | 2.5ft (0.7m) | 10s |
Table - waves today at Praia dos Castelhanos (Ilha Bela). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Fri 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 8 | 9 | 9 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 456 | 358 | 291 | 227 | 174 | 173 | 139 | 139 | 136 | 106 | 106 | 106 | 104 | 78 | 142 | 55 | 54 | 52 | 52 | 62 | 33 | 33 | 35 | 39 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | cross- off | off | cross- off | cross- off | cross- on | cross- on | cross- on | glass | on | glass | glass | cross- off | glass | cross- on | on | cross- on | glass | cross- on | glass | glass | cross- on | on |
High Tide / height (m) | 7:43PM 0.79 | 10:28AM 0.74 | 10:13PM 0.78 | 11:16AM 0.78 | 11:44PM 0.85 | 11:53AM 0.81 | ||||||||||||||||||
Low Tide / height (m) | 3:01PM 0.57 | 3:39AM 0.40 | 4:09PM 0.49 | 4:44AM 0.41 | 5:07PM 0.40 | 5:42AM 0.40 | ||||||||||||||||||
Fri 12 | Saturday 13 | Sunday 14 | Monday 15 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - |
| Sunset | 6:42 | - | - | - | - | - | - | - | 6:42 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - |
 |  | |  |  | | |  |  | |  | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | 2 | 3 | - | - | 3 | - | - | - | - | - | 1 | - | - | - | - | - | - | - | - | - | 2 |
| Temp. °C | 26 | 25 | 24 | 23 | 22 | 25 | 25 | 24 | 25 | 25 | 24 | 24 | 24 | 25 | 26 | 27 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 27 |
| Feels °C (?) | 29 | 26 | 27 | 24 | 24 | 28 | 28 | 28 | 28 | 29 | 27 | 28 | 28 | 29 | 30 | 29 | 28 | 27 | 29 | 28 | 28 | 30 | 30 | 30 |
- 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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