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

information circle48hr Weather and Surf, issued 8 am Monday 18 May 2026 -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
24.0° C
(Which is slightly warmer than usual)

How big are the waves at Praia dos Castelhanos (Ilha Bela) today?

The current surf forecast for Praia dos Castelhanos (Ilha Bela) at 12PM is: 0.5m 10s primary swell from a South direction and 0.2m 16s secondary swell from a South-southeast direction (forecast issued at 08:00am May 18). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (-03) & DateWave HeightWave Period
Morning (18 May)2ft (0.6m)10s
Afternoon (18 May)1.5ft (0.5m)10s
Evening (18 May)1ft (0.3m)15s

Table - waves today at Praia dos Castelhanos (Ilha Bela). (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy 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.

Monday
18
Tuesday
19
Wednesday
20
Thu
21
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
6 AM
9 AM
12 PM
3 PM
6 PM
9 PM
12 AM
3 AM
Rating
(10 max)
1
1
1
0
1
1
1
1
2
2
2
2
3
4
4
4
4
4
4
3
3
2
2
3
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.6
S
10
0.6
S
10
0.5
S
10
0.5
S
10
0.3
SSE
15
0.3
SSE
15
0.4
SSE
15
0.8
S
9
1.2
S
8
1.3
S
8
1.2
SSE
8
1.3
S
8
0.8
SSE
18
1.3
SSE
18
1.5
SSE
16
1.7
SSE
16
1.9
SSE
16
1.7
SSE
15
1.6
SSE
14
1.4
SSE
14
1.3
SSE
14
1.2
SSE
13
1.2
SSE
13
1.3
SSE
14
Wave Graph
Metric surfscale
Energy kJ
74
73
50
49
45
42
71
101
200
223
202
219
381
961
1137
1375
1696
1275
1106
799
646
531
531
714
Wind (km/h)
15
W
10
WSW
10
SW
15
WSW
15
SW
20
W
20
W
25
W
20
W
20
W
20
W
20
WSW
15
SW
10
SW
5
SW
10
SW
5
SW
5
WSW
10
WSW
10
SSW
10
SSW
10
S
10
S
10
SSW
off
off
cross-off
cross-off
cross-off
off
off
off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross
cross
cross-off
High Tide
3:56PM1.10m
3:17AM0.90m
4:41PM1.00m
3:49AM0.89m
5:29PM0.90m
Low Tide
9:45AM0.06m
10:47PM0.47m
10:29AM0.09m
11:35PM0.57m
11:22AM0.14m
00:27AM0.64m
cloud
cloud
part cloud
cloud
light rain
light rain
light rain
rain showers
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:30
6:30
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:24
5:23
5:23
5:23
1
2
1
1
2
1
1
1
2
1
2
3
2
1
1
1
1
1
1
1
Temp °C
22
23
24
23
22
21
21
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
23
25
26
23
23
21
20
18
19
19
19
19
20
22
22
22
22
22
21
21
21
21
21
21
Swell 1
Height (m)
Direction
Period (s)
0.6
S
10
0.6
S
10
0.5
S
10
0.5
S
10
0.4
SSE
10
0.4
SSE
10
0.4
SSE
10
0.8
S
9
0.3
SSE
13
1.3
S
8
1.2
SSE
8
1.3
S
8
1.3
S
8
1.3
SSE
18
1.5
SSE
16
1.7
SSE
16
1.9
SSE
16
1.7
SSE
15
1.6
SSE
14
1.4
SSE
14
1.3
SSE
14
1.2
SSE
13
1.2
SSE
13
1.3
SSE
14
Energy kJ
74
73
50
49
31
31
31
101
35
223
202
219
206
961
1137
1375
1696
1275
1106
799
646
531
531
714
Swell 2
Height (m)
Direction
Period (s)
0.2
ESE
4
0.2
ESE
5
0.2
SSE
16
0.2
SSE
16
0.3
SSE
15
0.3
SSE
15
0.4
SSE
15
0.3
SSE
16
0.2
SSE
16
0.4
SSE
13
0.3
SSE
15
0.5
SSE
19
0.8
SSE
18
1.2
SSE
8
1
SSE
8
1
SSE
7
0.8
SE
7
0.7
SE
7
0.7
SE
6
0.6
SE
6
0.6
SE
6
0.6
SE
6
0.5
SE
6
Energy kJ
2
2
26
25
45
42
71
48
26
58
45
214
381
178
123
101
55
44
40
30
23
21
16
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
17
0.1
SE
16
0.1
E
7
0.1
E
7
0.1
E
7
0.2
E
7
0.3
SSE
13
0.1
E
7
0.2
SSE
16
0.2
SSE
20
0.4
SSE
15
0.6
SSE
14
0.2
E
7
0.2
E
7
0.2
E
7
0.2
E
7
0.2
E
7
0.2
E
7
0.1
E
8
0.2
E
8
0.2
E
8
0.2
E
8
Energy kJ
11
11
1
1
1
4
35
1
25
40
73
165
4
4
4
4
4
4
1
5
5
5
Wind waves
Height (m)
Direction
Period (s)
0.2
WSW
2
0.3
SW
2
0.5
SW
3
0.7
SSW
4
0.5
SSW
5
0.5
SW
5
0.5
WSW
3
1.2
S
8
1.7
SSW
8
0.4
WSW
3
0.8
WSW
4
0.6
SW
3
0.8
SSE
6
0.8
SE
6
Energy kJ
1
1
5
15
12
10
5
200
402
4
22
6
44
45
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
2
2
2
1
3
4
4
4
4
4
4
3
3
3
3
3
Distance (km)
0
0
0
85
0
0
0
0
0
0
0
36
0
0
0
0
0
0
0
0
0
29
26
0
Best forecast wave conditions in São Paulo
Rating
(10 max)
1
1
1
1
1
1
1
1
2
2
2
3
3
4
4
4
4
4
4
3
3
3
3
4
Best forecast wave conditions in Brazil
Rating
(10 max)
2
1
1
3
3
2
2
2
2
4
4
4
4
4
4
4
4
4
4
3
3
5
4
5
Header Global
Rating
(10 max)
4
4
4
5
4
4
4
4
4
4
4
4
4
4
5
5
4
4
4
5
5
5
4
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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