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Praia dos Castelhanos (Ilha Bela) surfForecast / São Paulo / Brazil
16 Day Weather and Surf, issued 8 am Saturday 16 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
23.9° 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 Sunday (May 17) at 9AM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.3m and 3s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Praia dos Castelhanos (Ilha Bela) in the next 16 days are 2.3m 15s and forecast to arrive on Thursday (May 21) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 8s period and expected on Tuesday (May 19) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sun 17th May) | 2.5ft (0.8m) 11s |
| Best Surf | 9PM (Tue 19th May) | 4.5ft (1.4m) 18s |
| Most Powerful | 6PM (Thu 21st May) | 7.5ft (2.3m) 15s |
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 ForecastModerate rain (total 14mm), heaviest on Mon afternoon. Warm (max 23°C on Sun morning, min 20°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Wed morning. Warm (max 21°C on Wed morning, min 19°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||
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 11 | S 11 | SSE 11 | S 11 | SSE 11 | S 11 | S 10 | S 10 | S 9 | SSE 8 | SSE 20 | SSE 16 | SSE 15 | S 14 | SSE 13 | SSE 15 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | |
191 | 154 | 205 | 154 | 156 | 82 | 51 | 49 | 181 | 178 | 216 | 1841 | 1658 | 1178 | 531 | 1567 | 2218 | 1728 | 1288 | 1106 | 1156 | |
Wind (km/h) | |||||||||||||||||||||
glassy | on | cross-on | off | cross-off | cross-on | off | off | off | off | off | off | off | cross-off | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | |
High Tide | 2:31PM1.19m | 2:22AM0.93m | 3:13PM1.16m | 2:48AM0.91m | 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 | ||||||||
Low Tide | 9:15PM0.24m | 9:05AM0.06m | 10:01PM0.35m | 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 | ||||||||
 |  |  |  |  |  | | |  | |  | | | | | | | |  |  |  | |
 | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — |
 | — | 5:25 | — | — | 5:24 | — | — | 5:24 | — | — | 5:23 | — | — | 5:23 | — | — | 5:23 | — | — | 5:22 | — |
— | — | — | 2 | 2 | — | 1 | 4 | 5 | 2 | — | — | 3 | 2 | 5 | 1 | — | 2 | 7 | 11 | 25 | |
Temp °C | 22 | 22 | 22 | 23 | 23 | 23 | 22 | 22 | 21 | 20 | 20 | 20 | 21 | 20 | 20 | 19 | 19 | 19 | 19 | 18 | 19 |
23 | 23 | 23 | 25 | 23 | 24 | 23 | 22 | 20 | 20 | 19 | 20 | 22 | 20 | 20 | 19 | 19 | 19 | 19 | 16 | 19 | |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | SSE 11 | S 11 | SSE 11 | S 11 | S 10 | S 10 | S 9 | SSE 8 | SSE 7 | SSE 16 | SSE 15 | S 14 | SSE 13 | SSE 15 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 14 |
 kJ | 191 | 154 | 205 | 154 | 156 | 82 | 51 | 49 | 181 | 178 | 125 | 1841 | 1658 | 1178 | 531 | 1567 | 2218 | 1728 | 1288 | 1106 | 1156 |
Swell 2 Height (m) Direction Period (s) | E 8 | SSE 13 | E 7 | E 3 | SW 3 | E 4 | E 4 | SSE 16 | SSE 15 | SSE 13 | SSE 20 | S 8 | SE 6 | SE 6 | SSE 6 | E 8 | E 8 | — | E 8 | E 9 | E 9 |
| kJ | 5 | 35 | 1 | 2 | 1 | 5 | 1 | 25 | 42 | 59 | 216 | 233 | 18 | 23 | 21 | 5 | 5 | — | 6 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | SE 13 | E 8 | SE 12 | E 7 | E 4 | E 7 | SE 16 | E 4 | E 7 | SSE 16 | SSE 15 | E 7 | E 7 | E 8 | — | — | — | — | — | — | — |
| kJ | 7 | 4 | 6 | 1 | 1 | 1 | 11 | 1 | 4 | 25 | 73 | 4 | 4 | 4 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | ENE 2 | — | SW 3 | NE 3 | WSW 3 | SW 4 | — | — | SW 4 | SSW 8 | SW 4 | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | — | 2 | 3 | 1 | 4 | — | — | 10 | 196 | 26 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 29 | 10 | 0 | 75 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 45 | 45 | 36 | 29 | 29 | 45 | 37 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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