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Praia dos Castelhanos (Ilha Bela) surfForecast / São Paulo / Brazil
16 Day Weather and Surf, issued 8 am Monday 18 May 2026 -03Forecast update in hr min s Forecast update imminent
Praia dos Castelhanos (Ilha Bela) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Praia dos Castelhanos (Ilha Bela) sea temperature is
24.0° C
(Which is slightly warmer than usual)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 Monday (May 18) at 6PM. The primary swell is predicted to be 0.3m and 15s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Praia dos Castelhanos (Ilha Bela) in the next 16 days are 2.3m 16s and forecast to arrive on Thursday (May 21) at 6PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Tuesday (May 19) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 18th May) | 1ft (0.3m) 15s |
| Best Surf | 9PM (Tue 19th May) | 4.5ft (1.3m) 18s |
| Most Powerful | 6PM (Thu 21st May) | 7.5ft (2.3m) 16s |
Table - best surf conditions forecast for Praia dos Castelhanos (Ilha Bela) over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 28mm), heaviest during Tue night. Warm (max 24°C on Mon morning, min 20°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 30mm), heaviest during Sat night. Warm (max 20°C on Thu morning, min 19°C on Thu afternoon). Wind will be generally light. | ||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
S 10 | S 10 | SSE 15 | S 8 | S 8 | SSE 16 | SSE 15 | SSE 14 | SSE 13 | SSE 15 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | S 14 | SSE 14 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 11 | |
73 | 49 | 71 | 223 | 219 | 1137 | 1275 | 799 | 531 | 1349 | 2398 | 2233 | 1822 | 1569 | 1656 | 758 | 623 | 418 | 303 | 228 | 158 | |
Wind (km/h) | |||||||||||||||||||||
off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | on | glassy | on | glassy | cross-on | on | on | on | on | on | |
High Tide | 3:56PM1.10m | 3:17AM0.90m | 4:41PM1.00m | 3:49AM0.89m | 5:29PM0.90m | 4:26AM0.88m | 6:29PM0.80m | 5:13AM0.85m | 10:55PM0.77m | 6:16AM0.81m | 11:25PM0.78m | 7:53AM0.78m | 11:38PM0.80m | ||||||||
Low Tide | 9:45AM0.06m | 10:47PM0.47m | 10:29AM0.09m | 11:35PM0.57m | 11:22AM0.14m | 00:27AM0.64m | 12:26PM0.21m | 1:28AM0.68m | 1:41PM0.27m | 2:35AM0.67m | 2:55PM0.31m | 3:41AM0.61m | 4:04PM0.32m | ||||||||
 |  |  | | | | | |  | | |  |  | |  | | |  |  | | | |
 | 6:28 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 5:24 | — | — | 5:23 | — | — | 5:23 | — | — | 5:23 | — | — | 5:22 | — | — | 5:22 | — | — | 5:22 | — |
— | 1 | 6 | 2 | 3 | 8 | 2 | 2 | 4 | 2 | — | — | — | — | 5 | 5 | 2 | 16 | 6 | 2 | 3 | |
Temp °C | 24 | 23 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 |
26 | 23 | 21 | 19 | 19 | 22 | 22 | 21 | 21 | 19 | 19 | 19 | 21 | 20 | 21 | 17 | 20 | 20 | 18 | 19 | 18 | |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | SSE 10 | S 8 | S 8 | SSE 16 | SSE 15 | SSE 14 | SSE 13 | SSE 15 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | S 14 | SSE 14 | SSE 13 | SSE 13 | SSE 12 | ESE 6 | SSE 11 |
 kJ | 73 | 49 | 31 | 223 | 219 | 1137 | 1275 | 799 | 531 | 1349 | 2398 | 2233 | 1822 | 1569 | 1656 | 758 | 623 | 418 | 303 | 64 | 158 |
Swell 2 Height (m) Direction Period (s) | ESE 5 | SSE 16 | SSE 15 | SSE 13 | SSE 19 | SSE 8 | SE 7 | — | SE 6 | E 8 | E 7 | E 8 | E 8 | E 9 | E 9 | — | — | — | ESE 6 | SSE 12 | ESE 6 |
| kJ | 2 | 25 | 71 | 58 | 214 | 123 | 44 | — | 21 | 5 | 4 | 5 | 5 | 6 | 6 | — | — | — | 72 | 228 | 26 |
Swell 3 Height (m) Direction Period (s) | SE 16 | E 7 | E 7 | SSE 16 | SSE 15 | E 7 | E 7 | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | SSE 7 |
| kJ | 11 | 1 | 4 | 25 | 73 | 4 | 4 | — | 5 | — | — | — | — | — | — | — | — | — | — | — | 36 |
Wind waves Height (m) Direction Period (s) | WSW 2 | SW 3 | SW 5 | SSW 8 | WSW 4 | — | — | SSE 6 | — | — | — | — | — | — | SSE 14 | SE 7 | ESE 7 | ESE 6 | — | — | WSW 4 |
| kJ | 1 | 5 | 10 | 402 | 22 | — | — | 44 | — | — | — | — | — | — | 1224 | 178 | 237 | 147 | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 85 | 0 | 0 | 36 | 0 | 0 | 0 | 26 | 45 | 0 | 36 | 0 | 18 | 0 | 29 | 29 | 29 | 29 | 29 | 26 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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 Praia dos Castelhanos (Ilha Bela) 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 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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