Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
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Surf Forecasts:
Praia dos Castelhanos (Ilha Bela) surfForecast / São Paulo / Brazil
48hr Weather and Surf, issued 8 pm Tuesday 16 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
24.8° C
(Which is normal for this time of year)How big are the waves at Praia dos Castelhanos (Ilha Bela) today?
The current surf forecast for Praia dos Castelhanos (Ilha Bela) at 4AM is: 1.6m 7s primary swell from a South direction and 0.4m 9s secondary swell from a East-southeast direction, 0.2m 10s secondary swell from a South-southeast direction (forecast issued at 08:00pm December 16). The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 5ft (1.6m) | 8s |
| Afternoon (17 Dec) | 4.5ft (1.3m) | 8s |
| Evening (17 Dec) | 3.5ft (1.0m) | 8s |
Table - waves today at Praia dos Castelhanos (Ilha Bela). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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) (?) | 8 | 8 | 5 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 8 | 8 | 8 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 7 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 35 | 35 | 53 | 220 | 273 | 322 | 291 | 192 | 145 | 120 | 98 | 116 | 185 | 157 | 59 | 146 | 141 | 122 | 88 | 85 | 60 | 57 | 48 | 23 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross | cross- off | cross- off | cross | cross | cross- on | cross- on | cross- on | on | on | on | cross- on | on | on | on | on | cross- on | cross- on | cross- on | on | on | on |
High Tide / height (m) | 1:16AM 0.98 | 12:57PM 0.87 | 1:51AM 1.03 | 1:26PM 0.90 | 2:22AM 1.06 | 1:54PM 0.94 | ||||||||||||||||||
Low Tide / height (m) | 6:38PM 0.23 | 7:16AM 0.36 | 7:16PM 0.16 | 7:55AM 0.34 | 7:53PM 0.10 | 8:32AM 0.34 | ||||||||||||||||||
Tue 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - |
| Sunset | 6:44 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - |
 |  |  | |  | | |  | |  | | |  | | | | |  | | | | | | | |
Rain (mm) | 3 | 8 | 21 | 9 | 2 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 23 | 22 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 23 | 23 |
| Feels °C (?) | 27 | 28 | 23 | 21 | 22 | 22 | 21 | 22 | 21 | 21 | 21 | 22 | 22 | 21 | 22 | 22 | 22 | 21 | 22 | 23 | 23 | 25 | 24 | 23 |
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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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