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Lopes Mendes (Ilha Grande) Surf Forecast
/ Rio de Janeiro (47 surf breaks) /
Lopes Mendes (Ilha Grande) surfForecast / Rio de Janeiro / Brazil
12 Day Weather and Surf, issued 2 am Saturday 19 Apr 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 Saturday (Apr 19) at 6AM. The primary swell is predicted to be 0.9m and 11s period with a secondary swell of 0.7m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Lopes Mendes (Ilha Grande) in the next 12 days are 1.6m 10s and forecast to arrive on Monday (Apr 21) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Apr 24) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 19th Apr) | 3ft (0.9m) 11s |
| Best Surf | 9PM (Mon 21st Apr) | 4.5ft (1.3m) 9s |
| Most Powerful | 12PM (Mon 21st Apr) | 5ft (1.6m) 10s |
Table - best surf conditions forecast for Lopes Mendes (Ilha Grande) over the next 12 days.
Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | 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) (?) | 11 | 11 | 10 | 10 | 10 | 8 | 7 | 10 | 9 | 9 | 9 | 9 | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 6 | 13 | 7 | 12 | 11 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 196 | 149 | 96 | 47 | 39 | 265 | 226 | 400 | 262 | 276 | 203 | 158 | 408 | 389 | 426 | 302 | 238 | 180 | 130 | 94 | 78 | 85 | 275 | 203 | 507 | 520 | 1035 | 1216 | 887 | 797 | 919 | 813 | 605 | 421 | 745 | 649 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | glass | glass | cross | off | off | cross- off | off | glass | cross | glass | on | on | on | glass | cross | cross- off | cross- off | cross- off | cross- off | off | cross | on | on | cross- on | glass | glass | cross- on | on |
High Tide / height (m) | 6:51PM 0.81 | 6:19AM 0.74 | 11:22PM 0.87 | 8:21AM 0.70 | 12:04AM 0.98 | 11:23AM 0.81 | 12:39AM 1.07 | 12:02PM 0.93 | 1:08AM 1.12 | 12:36PM 1.04 | 1:32AM 1.13 | 1:10PM 1.14 | 1:52AM 1.10 | 1:45PM 1.20 | 2:09AM 1.06 | 2:21PM 1.23 | 2:28AM 1.02 | 2:58PM 1.21 | 2:50AM 0.99 | 3:36PM 1.15 | 3:16AM 0.96 | 4:16PM 1.06 | ||||||||||||||
Low Tide / height (m) | 1:22PM 0.33 | 2:42AM 0.58 | 2:53PM 0.33 | 4:10AM 0.54 | 4:15PM 0.26 | 5:18AM 0.47 | 5:22PM 0.16 | 6:10AM 0.38 | 6:17PM 0.06 | 6:53AM 0.30 | 7:06PM -0.00 | 7:32AM 0.23 | 7:52PM -0.02 | 8:09AM 0.16 | 8:37PM 0.02 | 8:45AM 0.11 | 9:21PM 0.11 | 9:21AM 0.08 | 10:04PM 0.24 | 9:58AM 0.07 | 10:48PM 0.38 | 10:38AM 0.09 | 11:34PM 0.51 | |||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 29 | Wednesday 30 | |||||||||||||||||||||||||
| Sunrise | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:11 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:13 | - | - | 6:15 | - | - | 6:15 | - | - |
| Sunset | - | 5:38 | - | - | 5:38 | - | - | 5:37 | - | - | 5:37 | - | - | 5:36 | - | - | 5:35 | - | - | 5:35 | - | - | 5:34 | - | - | 5:32 | - | - | 5:31 | - | - | 5:31 | - | - | 5:30 | - |
 | |  | |  |  |  | | |  | |  | | | | | | | |  |  |  | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | 1 | - | 3 | 12 | 5 | 5 | 5 | - | - | - | - | - | - | - | - | - | - | 29 | 5 | 2 | 2 | 4 | - | - | 4 | - | 1 | 6 | 2 | - | 1 | - | - | - |
| Temp. °C | 25 | 26 | 24 | 24 | 24 | 23 | 22 | 21 | 22 | 23 | 23 | 23 | 23 | 24 | 23 | 24 | 24 | 24 | 24 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 23 | 22 | 23 | 23 | 23 | 23 | 24 | 23 |
| Feels °C (?) | 28 | 29 | 26 | 25 | 24 | 25 | 23 | 23 | 24 | 25 | 23 | 23 | 23 | 23 | 22 | 26 | 26 | 27 | 26 | 17 | 23 | 26 | 25 | 22 | 22 | 21 | 20 | 24 | 25 | 24 | 25 | 24 | 26 | 24 | 24 | 22 |
Short Range Forecast: Heavy rain (total 31mm), heaviest during Sun night. Warm (max 26°C on Sat afternoon, min 21°C on Mon morning). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 24°C on Wed afternoon, min 22°C on Tue morning). Wind will be generally light. | Days 6-9 Weather Summary Heavy rain (total 46mm), heaviest during Fri afternoon. Warm (max 24°C on Fri morning, min 21°C on Fri afternoon). Winds decreasing (strong winds from the SW on Fri afternoon, calm by Sat morning). | Long Range Forecast: Moderate rain (total 10mm), heaviest on Mon night. Warm (max 24°C on Wed afternoon, min 21°C on Mon morning). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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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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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.
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