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:
Lopes Mendes (Ilha Grande) surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 am Sunday 21 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Lopes Mendes (Ilha Grande) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Lopes Mendes (Ilha Grande) sea temperature is
25.6° C
(Which is slightly warmer than usual)How big are the waves at Lopes Mendes (Ilha Grande) today?
The current surf forecast for Lopes Mendes (Ilha Grande) at 6AM is: 0.8m 5s primary swell from a East-southeast direction and 0.3m 13s secondary swell from a South direction (forecast issued at 02:00am December 21). An open ocean swell of 1.1m 6s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Dec) | 3ft (0.9m) | 6s |
| Afternoon (21 Dec) | 1.5ft (0.5m) | 12s |
| Evening (21 Dec) | 1.5ft (0.5m) | 11s |
Table - waves today at Lopes Mendes (Ilha Grande). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 21 | Monday 22 | Tuesday 23 | ||||||||||||||||||||||
| 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 | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 5 | 5 | 5 | 6 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 7 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 18 | 22 | 37 | 47 | 51 | 75 | 73 | 64 | 63 | 63 | 64 | 54 | 53 | 71 | 71 | 46 | 40 | 39 | 23 | 22 | 96 | 118 | 121 | 128 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | off | cross- off | cross- off | cross- off | off | off | cross- off | cross- off | glass | cross | cross- off | off | glass |
High Tide / height (m) | 3:25AM 1.08 | 2:59PM 1.02 | 3:57AM 1.07 | 3:33PM 1.05 | 4:31AM 1.05 | 4:08PM 1.05 | ||||||||||||||||||
Low Tide / height (m) | 9:58AM 0.35 | 10:04PM 0.04 | 10:35AM 0.37 | 10:45PM 0.06 | 11:15AM 0.39 | |||||||||||||||||||
Sunday 21 | Monday 22 | Tuesday 23 | ||||||||||||||||||||||
| Sunrise | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:40 | - | - | - | - | - | - | - | 6:40 | - | - | - | - | - | - | - | 6:42 | - |
 | |  | | | | | | | | | | | | | | | | | | |  |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 23 | 23 | 22 | 24 | 25 | 25 | 24 | 24 | 24 | 24 | 23 | 26 | 28 | 27 | 25 | 25 | 25 | 24 | 24 | 27 | 29 | 27 | 26 | 26 |
| Feels °C (?) | 25 | 26 | 24 | 26 | 24 | 25 | 24 | 24 | 25 | 24 | 23 | 26 | 27 | 25 | 24 | 26 | 26 | 24 | 24 | 29 | 29 | 28 | 28 | 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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