Surf Forecasts:
Lopes Mendes (Ilha Grande) surf forecast from 18 Jun 2026:
- Best quality surf: Thursday 18 Jun, 6PM (local time) - 6ft (1.9m), 13s period, S swell with cross-offshore winds.
- Most powerful swell: Friday 19 Jun, 3PM (local time) - 7ft (2.1m), 13s period, S swell with 1,584 kJ wave energy.
- Next surfable swell (1★+): Thursday 18 Jun, 6PM (local time) - 6ft (1.9m), 13s period with S swell.
Best Forecast Surf Conditions for Lopes Mendes (Ilha Grande) this week:
The surf forecast for Lopes Mendes (Ilha Grande) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jun 18) at 6PM. The primary swell is predicted to be 1.9m and 13s 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 16 days are 2.1m 13s and forecast to arrive on Friday (Jun 19) at 3PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Jun 19) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Thu 18th Jun) | 6ft (1.9m) 13s |
| Best Surf | 6PM (Thu 18th Jun) | 6ft (1.9m) 13s |
| Most Powerful | 3PM (Fri 19th Jun) | 7ft (2.1m) 13s |
Table - best surf conditions forecast for Lopes Mendes (Ilha Grande) over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 23°C on Fri afternoon, min 17°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Tue afternoon. Warm (max 21°C on Sat night, min 19°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wed 24 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Wave Height (m) Direction Period (s) | S 11 | S 15 | S 14 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | SW 6 | SW 6 | S 10 | SSW 10 | SSW 9 | SSW 9 | S 9 | S 12 | SSE 16 | SSE 15 | S 9 | S 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 475 | 358 | 1214 | 1412 | 1346 | 1584 | 757 | 353 | 278 | 118 | 151 | 56 | 205 | 181 | 147 | 106 | 172 | 206 | 309 | 607 | 654 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | off | off | cross-off | cross-off | off | on | cross-on | on | on | glassy | cross-off | cross-off | off | on | on | on | on | on |
High Tide | 3:50AM1.01m | 5:18PM0.94m | 4:32AM1.01m | 5:56PM0.87m | 5:18AM0.98m | 6:38PM0.81m | 6:12AM0.92m | 7:28PM0.78m | 7:18AM0.86m | 8:33PM0.76m | 8:57AM0.81m | 9:52PM0.77m | 10:59AM0.83m | ||||||||
Low Tide | 11:32PM0.50m | 11:41AM0.04m | 00:13AM0.54m | 12:30PM0.12m | 00:56AM0.55m | 1:21PM0.21m | 1:45AM0.55m | 2:15PM0.30m | 2:40AM0.52m | 3:15PM0.38m | 3:42AM0.47m | 4:20PM0.43m | 4:46AM0.41m | 5:27PM0.45m | |||||||
 |  | | | | | | |  |  |  | | | | | |  | |  | | | |
 | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — |
 | — | — | 5:17 | — | — | 5:19 | — | — | 5:19 | — | — | 5:19 | — | — | 5:19 | — | — | 5:19 | — | — | 5:20 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 20 | 3 | 2 |
Temp °C | 20 | 20 | 20 | 19 | 21 | 23 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 21 | 21 | 21 | 21 | 19 | 17 | 17 |
Feels °C | 19 | 19 | 19 | 19 | 20 | 21 | 19 | 21 | 19 | 23 | 22 | 20 | 20 | 22 | 21 | 22 | 22 | 21 | 17 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | S 14 | S 13 | S 13 | S 13 | S 13 | S 12 | S 12 | S 11 | E 8 | E 9 | SSW 10 | SSW 9 | SSW 9 | S 9 | S 12 | S 11 | SSE 15 | SSE 13 | S 10 |
| kJ | 475 | 358 | 1214 | 1412 | 1346 | 1584 | 757 | 353 | 278 | 118 | 57 | 61 | 205 | 181 | 147 | 106 | 172 | 149 | 309 | 307 | 654 |
Swell 2 Height (m) Direction Period (s) | ESE 9 | S 15 | ESE 8 | ESE 8 | ESE 8 | ESE 10 | ESE 7 | ESE 7 | ESE 7 | ESE 7 | S 11 | S 6 | SSE 7 | SSE 7 | SE 7 | SE 7 | E 9 | E 9 | S 10 | ESE 9 | SSE 12 |
| kJ | 47 | 339 | 24 | 14 | 24 | 33 | 83 | 82 | 66 | 41 | 85 | 27 | 27 | 43 | 39 | 53 | 79 | 76 | 64 | 25 | 224 |
Swell 3 Height (m) Direction Period (s) | S 17 | ESE 9 | ESE 9 | — | — | — | ESE 10 | ESE 9 | ESE 10 | ESE 10 | SSE 10 | S 10 | E 10 | E 10 | E 9 | E 9 | SE 7 | SSE 16 | E 9 | ESE 9 | ESE 8 |
| kJ | 90 | 26 | 25 | — | — | — | 30 | 29 | 31 | 32 | 10 | 56 | 48 | 46 | 44 | 42 | 14 | 206 | 39 | 25 | 24 |
Wind waves Height (m) Direction Period (s) | SSW 5 | — | — | — | NE 3 | — | NE 3 | NNE 3 | — | SW 6 | SW 6 | SW 6 | — | NE 2 | E 2 | NNE 2 | SW 5 | SW 5 | S 7 | S 9 | SSE 7 |
| kJ | 20 | — | — | — | 3 | — | 2 | 3 | — | 111 | 151 | 43 | — | 1 | 1 | 1 | 55 | 22 | 279 | 607 | 134 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 20 | 59 | 0 | 0 | 0 | 0 | 0 | 97 | 58 | 20 | 20 | 0 | 0 | 0 | 0 | 20 | 20 | 65 | 97 | 20 |
Best forecast wave conditions in Rio de Janeiro | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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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 16 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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