Surf Forecasts:
Praia dos Castelhanos (Ilha Bela) surf forecast from 9 Jul 2026:
- Best quality surf: Monday 13 Jul, 12AM (local time) - 5ft (1.5m), 11s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 9PM (local time) - 5.5ft (1.7m), 11s period, S swell with 639 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 9AM (local time) - 2.5ft (0.7m), 14s period with SE swell.
Best Forecast Surf Conditions for Praia dos Castelhanos (Ilha Bela) this week:
The surf forecast for Praia dos Castelhanos (Ilha Bela) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jul 10) at 9AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.5m and 9s. Another secondary swell of 0.4m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Praia dos Castelhanos (Ilha Bela) in the next 16 days are 1.7m 11s and forecast to arrive on Monday (Jul 13) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 10s period and expected on Sunday (Jul 12) at 3PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 10th Jul) | 2.5ft (0.7m) 14s |
| Best Surf | 12AM (Mon 13th Jul) | 5ft (1.5m) 11s |
| Most Powerful | 9PM (Mon 13th Jul) | 5.5ft (1.7m) 11s |
Table - best surf conditions forecast for Praia dos Castelhanos (Ilha Bela) over the next 16 days.
Short Range ForecastMostly dry. Warm (max 22°C on Fri morning, min 17°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sun afternoon. Warm (max 22°C on Sun morning, min 17°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | S 11 | S 11 | S 10 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | S 11 | SSE 11 | SSE 12 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SE 9 | SE 9 | E 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 160 | 149 | 66 | 198 | 250 | 345 | 330 | 374 | 305 | 252 | 175 | 556 | 292 | 418 | 292 | 209 | 209 | 179 | 198 | 192 | 86 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | glassy | cross-on | off | glassy | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:23AM0.86m | 11:07PM0.74m | 12:27PM0.95m | 00:18AM0.76m | 1:28PM1.05m | 00:59AM0.79m | 2:15PM1.12m | 1:33AM0.85m | 2:55PM1.15m | 2:04AM0.92m | 3:30PM1.13m | 2:36AM0.99m | 3:59PM1.09m | ||||||||
Low Tide | 5:21PM0.38m | 5:32AM0.31m | 6:36PM0.36m | 6:33AM0.21m | 7:37PM0.35m | 7:26AM0.10m | 8:27PM0.35m | 8:13AM0.02m | 9:07PM0.37m | 8:58AM-0.04m | 9:42PM0.40m | 9:40AM-0.06m | 10:12PM0.43m | ||||||||
 | |  | | | | | | |  |  |  |  | |  | | | | | | | |
 | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | 5:28 | — | — | 5:28 | — | — | 5:29 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | — | 5:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 3 | 1 | 1 | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 18 | 22 | 22 | 20 | 20 | 21 | 21 | 22 | 21 | 19 | 19 | 18 | 18 | 19 | 19 | 18 | 19 | 20 | 21 |
Feels °C | 18 | 18 | 17 | 22 | 22 | 20 | 20 | 20 | 21 | 22 | 20 | 19 | 19 | 17 | 17 | 18 | 17 | 15 | 18 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | SE 14 | SE 13 | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | S 12 | SSE 11 | SSE 12 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SE 9 | SE 9 | ESE 6 |
| kJ | 160 | 149 | 66 | 198 | 250 | 345 | 330 | 374 | 305 | 252 | 175 | 339 | 292 | 418 | 292 | 209 | 209 | 179 | 198 | 192 | 43 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 10 | S 9 | S 9 | S 8 | S 8 | S 7 | E 3 | ESE 4 | S 9 | SE 12 | SSE 16 | SE 11 | SSE 15 | SSE 14 | SE 10 | S 12 | SSW 8 | S 14 | SE 9 |
| kJ | 87 | 65 | 51 | 39 | 24 | 12 | 4 | 1 | 2 | 3 | 25 | 84 | 98 | 5 | 42 | 36 | 17 | 26 | 13 | 4 | 86 |
Swell 3 Height (m) Direction Period (s) | S 16 | — | SE 14 | E 3 | E 4 | ESE 4 | S 14 | S 14 | S 7 | SSE 21 | SSE 20 | SSE 18 | SE 11 | SE 11 | SE 8 | S 14 | SE 10 | SW 8 | S 11 | S 16 | S 15 |
| kJ | 5 | — | 29 | 1 | 1 | 1 | 4 | 4 | 1 | 44 | 75 | 64 | 44 | 59 | 10 | 32 | 17 | 2 | 22 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | ENE 3 | NE 3 | — | — | — | — | ENE 3 | WSW 3 | SSW 10 | S 11 | — | — | — | — | — | NE 2 | ENE 4 | E 5 | E 6 |
| kJ | — | — | 2 | 3 | — | — | — | — | 3 | 3 | 125 | 556 | — | — | — | — | — | 1 | 17 | 27 | 77 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 45 | 18 | 0 | 29 | 0 | 0 | 26 | 0 | 0 | 30 | 0 | 0 | 0 | 0 | 18 | 45 | 18 | 10 | 12 | 10 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Praia dos Castelhanos (Ilha Bela) Surf forecast
The above surf forecast table for Praia dos Castelhanos (Ilha Bela) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Praia dos Castelhanos (Ilha Bela) can be found by selecting the local surf guide option on the grey menu. Our Praia dos Castelhanos (Ilha Bela) 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 (Praia dos Castelhanos (Ilha Bela)) 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 Praia dos Castelhanos (Ilha Bela) 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.
Praia dos Castelhanos (Ilha Bela) is 11 km (7 miles) from the city of Ilhabela. If you plan a holiday in São Paulo, look for hotels and other accommodation in Ilhabela. Ilhabela has rooms for a wide range of budgets as well as car hire and transport links.
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