Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Prainha surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 pm Thursday 18 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Prainha surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Prainha sea temperature is
27.5° C
(Which is 2.9°C warmer than normal for this time of year)How big are the waves at Prainha today?
The current surf forecast for Prainha at 8PM is: 1.4m 10s primary swell from a South-southwest direction and 0.3m 11s secondary swell from a Southeast direction, 0.9m 6s secondary swell from a East-southeast direction (forecast issued at 02:00pm December 18). The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | - | - |
| Afternoon (18 Dec) | 4.5ft (1.3m) | 9s |
| Evening (18 Dec) | 4.5ft (1.3m) | 10s |
Table - waves today at Prainha. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||||||
| 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 | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 6 | 6 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 245 | 277 | 408 | 314 | 301 | 248 | 220 | 181 | 177 | 146 | 88 | 158 | 59 | 111 | 75 | 72 | 49 | 47 | 32 | 51 | 72 | 138 | 132 | 76 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross- on | cross | glass | glass | on | on | on | cross- on | glass | glass | glass | glass | on | on | on | cross- on | glass | glass | cross | cross- on |
High Tide / height (m) | 1:25PM 0.82 | 2:28AM 0.97 | 1:53PM 0.84 | 2:59AM 0.98 | 2:20PM 0.87 | 3:29AM 0.97 | ||||||||||||||||||
Low Tide / height (m) | 7:43PM 0.08 | 8:21AM 0.31 | 8:21PM 0.04 | 8:57AM 0.31 | 9:01PM 0.02 | |||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:05 | - |
| Sunset | - | - | 6:36 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - | - | - | 6:37 | - | - | - | - | - |
 |  | |  |  | | | | | |  |  | | | | | | |  |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | 1 | 1 | - | - | - | - | 1 | 1 | - | - | - | - | - | - |
| Temp. °C | 23 | 22 | 21 | 21 | 21 | 21 | 21 | 24 | 26 | 25 | 23 | 23 | 23 | 22 | 22 | 25 | 26 | 26 | 24 | 23 | 22 | 22 | 22 | 26 |
| Feels °C (?) | 24 | 23 | 22 | 22 | 23 | 23 | 23 | 26 | 27 | 26 | 26 | 26 | 27 | 26 | 26 | 29 | 29 | 28 | 26 | 26 | 26 | 26 | 25 | 29 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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