Praia dos Castelhanos (Ilha Bela) Surf Forecast

/ São Paulo (84 surf breaks) /

Brazil (447 surf breaks) / Lat Long: (23.86° S 45.29° W)

Surf Forecasts:

Praia dos Castelhanos (Ilha Bela) surfForecast / São Paulo / Brazil

12 Day Weather and Surf, issued 8 pm Saturday 18 Oct 2025 -03

Forecast 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 21.5° C
(Which is slightly cooler than normal)

Best Forecast Surf Conditions for Praia dos Castelhanos (Ilha Bela) this week:

The surf forecast for Praia dos Castelhanos (Ilha Bela) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Oct 19) at 9AM. The primary swell is predicted to be 3.0m and 9s period with a secondary swell of 1.8m and 9s. Another secondary swell of 0.4m and 8s is also forecast. 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 12 days are 3.0m 10s and forecast to arrive on Sunday (Oct 19) 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 1.4m 5s period and expected on Sunday (Oct 19) at 3AM.

Wave Type	Time (-03) & Date	Wave Height & Period
Next good surf (1 star+)	9AM (Sun 19th Oct)	10ft (3.0m) 9s
Best Surf	9AM (Sun 19th Oct)	10ft (3.0m) 9s
Most Powerful	6PM (Sun 19th Oct)	10ft (3.0m) 10s

Table - best surf conditions forecast for Praia dos Castelhanos (Ilha Bela) over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 32mm), heaviest during Sat night. Warm (max 21°C on Sat night, min 17°C on Mon night). Mainly fresh winds.										Days 3-6 Weather Summary Mostly dry. Warm (max 20°C on Wed afternoon, min 18°C on Tue night). Mainly fresh winds.
		Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Sat 25
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	0	!	2	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	ESE	S	SSE	SSE	SSE	SSE	SSE	SSE	SE	ESE	ESE	ESE	ESE	ESE	SE	ESE	ESE	ESE	ESE	ESE	ESE
Period(s) (?)	8	9	9	9	9	10	10	10	9	9	7	8	8	8	8	8	8	8	8	9	9
Wave Graph (?)
kJ (?)	47	1288	653	586	469	661	457	301	325	300	314	261	270	212	129	463	314	357	520	858	493
Wind (km/h)	SW	SSW	SSW	SE	ESE	ESE	E	ENE	E	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE	ENE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	cross- off	cross- on	cross- on	cross- on	on	on	on	cross- on	cross- on	on	cross- on	cross- on	on	cross- on	cross- on	on	cross- on	on	cross- on
High Tide / height (m)	1:01AM 1.07		1:32PM 1.04	1:29AM 1.13		1:49PM 1.05	1:58AM 1.16		2:08PM 1.05	2:26AM 1.16		2:27PM 1.04	2:54AM 1.14		2:47PM 1.01		3:23AM 1.10	3:10PM 0.99		3:55AM 1.04	3:37PM 0.95
Low Tide / height (m)		7:24AM 0.10		7:33PM 0.22	7:54AM 0.11		7:58PM 0.15	8:22AM 0.14		8:23PM 0.11	8:49AM 0.19		8:48PM 0.09	9:16AM 0.25		9:13PM 0.09	9:44AM 0.33		9:41PM 0.12	10:15AM 0.40

		Sunday 19			Monday 20			Tuesday 21			Wednesday 22			Thursday 23			Friday 24			Sat 25
Sunrise	-	5:24	-	-	5:24	-	-	5:22	-	-	5:22	-	-	5:20	-	-	5:20	-	-	5:20	-
Sunset	-	-	6:07	-	-	6:07	-	-	6:07	-	-	6:08	-	-	6:08	-	-	6:09	-	-	6:09

Rain (mm)	21	4	1	3	2	-	1	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Temp. °C	21	19	19	18	19	19	19	19	19	19	19	20	19	20	20	20	20	20	20	21	21
Feels °C (?)	22	18	16	16	17	16	15	16	15	14	15	16	14	17	17	16	19	17	17	21	19

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for São Paulo

Wind Update Continuing clean conditions at Praia dos Castelhanos (Ilha Bela) (calm at Parati 91 km from Praia dos Castelhanos (Ilha Bela)). 0.8m 8s swell from the ESE with a 0.3m 9s swell from the S and a 0.2m 12s groundswell from the SSE. 3 swells combining to make bigger set waves.
1 hour 12 minutes ago Praia dos Castelhanos (Ilha Bela)

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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 12 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.