- Forecast
- Maps
- Live
- Weather State
- Spot Information
Lopes Mendes (Ilha Grande) Surf Forecast
/ Rio de Janeiro (47 surf breaks) /
Surf Forecasts:
Lopes Mendes (Ilha Grande) surfForecast / Rio de Janeiro / Brazil
12 Day Weather and Surf, issued 2 am Sunday 14 Sep 2025 -03
Best Forecast Surf Conditions for Lopes Mendes (Ilha Grande) this week:
The surf forecast for Lopes Mendes (Ilha Grande) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 15) at 12AM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Lopes Mendes (Ilha Grande) in the next 12 days are 2.0m 14s and forecast to arrive on Monday (Sep 15) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 9s period and expected on Friday (Sep 19) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Mon 15th Sep) | 6ft (1.9m) 14s |
| Best Surf | 12AM (Mon 15th Sep) | 6ft (1.9m) 14s |
| Most Powerful | 9AM (Mon 15th Sep) | 6.5ft (2.0m) 14s |
Table - best surf conditions forecast for Lopes Mendes (Ilha Grande) over the next 12 days.
Short Range Forecast Light rain (total 3mm), mostly falling on Tue afternoon. Warm (max 22°C on Tue morning, min 19°C on Sun morning). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 29°C on Fri morning, min 20°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 13 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 8 | 8 | 9 | 11 | 11 | 8 | 16 | 10 | 9 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 1226 | 1240 | 1291 | 1429 | 1253 | 867 | 769 | 769 | 757 | 1050 | 917 | 850 | 298 | 449 | 878 | 72 | 71 | 0 | 5 | 15 | 12 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on | on | on | glass | cross- off | cross- off | off | off | cross- off | on | cross- on | cross | cross- off |
High Tide / height (m) | 11:52AM 0.80 | 5:49PM 0.73 | 11:47PM 0.49 | 12:42PM 0.91 | 6:51PM 12:15AM 0.65 0.60 | 1:16PM 0.98 | 12:27AM 0.72 | 1:40PM 1.03 | 12:37AM 0.85 | 1:54PM 1.05 | 12:55AM 0.97 | 2:00PM 1.07 | 1:20AM 1.08 | 2:10PM 1.09 | 1:48AM 1.16 | ||||||
Low Tide / height (m) | 9:02AM 0.73 | 3:21PM 0.67 | 10:22PM 0.48 | 3:20AM 0.36 | 5:23PM 0.64 | 10:17PM 0.58 | 4:56AM 0.29 | 6:23PM 0.55 | 6:05AM 0.19 | 6:57PM 0.46 | 6:54AM 0.09 | 7:28PM 0.38 | 7:34AM 0.02 | 7:57PM 0.31 | 8:09AM -0.01 | 8:25PM 0.25 | |||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| Sunrise | 5:54 | - | - | 5:52 | - | - | 5:52 | - | - | 5:50 | - | - | 5:50 | - | - | 5:48 | - | - | 5:48 | - | - |
| Sunset | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:51 | - | - | 5:51 | - | - | 5:51 | - |
 |  |  | | | | |  |  | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 20 | 20 | 20 | 20 | 21 | 20 | 22 | 21 | 21 | 21 | 22 | 21 | 22 | 22 | 23 | 29 | 25 | 24 | 23 | 23 | 23 |
| Feels °C (?) | 18 | 17 | 18 | 20 | 20 | 20 | 21 | 22 | 23 | 21 | 22 | 23 | 23 | 21 | 23 | 29 | 24 | 26 | 24 | 25 | 26 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Rio de Janeiro
Continuing clean conditions at Lopes Mendes (Ilha Grande) (calm at Santa Cruz (Aero) 51 km from Lopes Mendes (Ilha Grande)). A 1.9m groundswell from the SSE
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Lopes Mendes (Ilha Grande) surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Lopes Mendes (Ilha Grande) Surf forecast
The above surf forecast table for Lopes Mendes (Ilha Grande) provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Lopes Mendes (Ilha Grande) can be found by selecting the local surf guide option on the grey menu. Our Lopes Mendes (Ilha Grande) surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Lopes Mendes (Ilha Grande)) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Lopes Mendes (Ilha Grande) may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Nearest