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Surf Forecasts:
Lopes Mendes (Ilha Grande) surfForecast / Rio de Janeiro / Brazil
48hr Weather and Surf, issued 2 am Thursday 11 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
24.8° C
(Which is normal for this time of year)How big are the waves at Lopes Mendes (Ilha Grande) today?
The current surf forecast for Lopes Mendes (Ilha Grande) at 8AM is: 0.4m 11s primary swell from a South direction and 0.5m 3s secondary swell from a West direction (forecast issued at 02:00am December 11). An open ocean swell of 0.6m 10s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 Dec) | 1.5ft (0.4m) | 11s |
| Afternoon (11 Dec) | 2.5ft (0.8m) | 6s |
| Evening (11 Dec) | 4.5ft (1.3m) | 13s |
Table - waves today at Lopes Mendes (Ilha Grande). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| 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) (?) | 12 | 12 | 11 | 11 | 11 | 6 | 7 | 13 | 12 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 69 | 44 | 40 | 38 | 21 | 51 | 103 | 581 | 1336 | 1532 | 1497 | 1302 | 1240 | 1064 | 833 | 681 | 629 | 545 | 449 | 432 | 353 | 290 | 239 | 233 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross | on | cross- on | cross- on | glass | off | off | off | off | cross- off | cross- off | cross- off | cross- off | glass | cross- on | on | cross- off | off | off | cross- off | cross- off | off |
High Tide / height (m) | 7:07AM 0.77 | 6:31PM 0.86 | 8:43AM 0.75 | 8:00PM 0.80 | 10:32AM 0.77 | |||||||||||||||||||
Low Tide / height (m) | 1:46AM 0.27 | 2:17PM 0.59 | 2:48AM 0.34 | 3:22PM 0.55 | 3:53AM 0.38 | 4:26PM 0.48 | ||||||||||||||||||
Thursday 11 | Friday 12 | Saturday 13 | ||||||||||||||||||||||
| Sunrise | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - | 6:36 | - | - | - | - | - | - | - | 6:36 | - |
 | |  | | | | | | | |  | | | |  |  | |  |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 2 | - | - | - |
| Temp. °C | 27 | 26 | 26 | 27 | 28 | 26 | 25 | 24 | 24 | 23 | 24 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 22 | 23 | 23 | 24 | 24 | 24 |
| Feels °C (?) | 29 | 27 | 28 | 29 | 29 | 26 | 28 | 25 | 24 | 23 | 24 | 27 | 26 | 25 | 28 | 27 | 26 | 25 | 24 | 25 | 26 | 26 | 27 | 27 |
- 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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