Siriu surfForecast / Santa Catarina – Sul / Brazil

information circle48hr Weather and Surf, issued 8 am Sunday 17 May 2026 -03
Forecast update in hr  min  s Forecast update imminent
Siriu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Siriu sea temperature is
21.3° C
(Which is slightly cooler than normal)

How big are the waves at Siriu today?

The current surf forecast for Siriu at 2PM is: 0.8m 10s primary swell from a South-southeast direction and 0.2m 4s secondary swell from a East-southeast direction (forecast issued at 08:00am May 17). The wind direction is predicted to be cross-onshore.

Time (-03) & DateWave HeightWave Period
Morning (17 May)3ft (0.9m)10s
Afternoon (17 May)2.5ft (0.8m)10s
Evening (17 May)2.5ft (0.7m)10s

Table - waves today at Siriu. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 21mm), heaviest during Sun night. Warm (max 21°C on Sun morning, min 13°C on Mon night). Wind will be generally light.

Sunday
17
Monday
18
Tuesday
19
Wed
20
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)
2
1
0
0
1
1
1
0
0
1
2
0
1
2
2
3
3
4
3
3
3
4
4
4
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)
1
S
10
0.9
SSE
10
0.9
SSE
10
0.8
SSE
10
0.8
S
10
0.7
S
10
0.7
S
10
0.6
S
10
1.2
S
6
1.5
SSE
7
1.7
SSE
7
1.1
SE
6
1.2
S
6
2.2
S
7
2.1
S
8
2
S
7
0.9
SSE
14
1.5
SSE
18
1.8
SSE
16
2.2
SSE
15
2.2
SSE
15
2.1
SSE
14
1.9
SSE
14
1.7
SSE
14
Wave Graph
Metric surfscale
Energy kJ
225
177
170
133
125
94
92
68
112
189
268
88
109
453
487
434
298
1393
1675
2279
1994
1724
1341
1090
Wind (km/h)
10
SW
10
SSW
10
SSE
10
S
15
SSW
15
SW
15
SW
20
SW
20
SW
25
SW
30
SW
30
WSW
30
SW
25
SW
20
SW
20
SW
20
SW
15
SW
15
S
15
S
10
S
5
SW
5
SW
5
WSW
cross-off
cross-off
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
glassy
glassy
High Tide
2:47PM0.78m
1:51AM0.53m
3:30PM0.73m
2:11AM0.55m
4:16PM0.65m
8:00PM0.64m
2:35AM0.57m
Low Tide
8:39AM0.09m
10:06PM0.33m
9:18AM0.08m
11:03PM0.43m
10:05AM0.09m
6:31PM0.63m
00:01AM0.51m
part cloud
part cloud
clear
part cloud
cloud
light rain
light rain
light rain
light rain
light rain
light rain
light rain
rain showers
light rain
light rain
cloud
part cloud
clear
clear
cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:50
6:50
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:30
5:30
5:30
5:30
2
1
1
5
5
1
2
2
1
1
Temp °C
17
18
21
19
18
18
17
17
17
16
15
14
14
13
13
13
13
14
17
16
16
15
14
13
17
18
22
20
17
17
16
15
15
13
11
9
9
9
9
10
10
11
14
13
14
14
13
12
Swell 1
Height (m)
Direction
Period (s)
1
S
10
0.9
SSE
10
0.9
SSE
10
0.8
SSE
10
0.8
S
10
0.7
S
10
0.7
S
10
0.6
S
10
0.5
S
10
0.4
SSE
10
1.4
SSE
7
1.1
SE
6
0.8
ESE
6
1.6
S
7
1.6
SSE
7
1.5
S
7
1.4
S
7
1.5
SSE
18
1.8
SSE
16
2.2
SSE
15
2.2
SSE
15
2.1
SSE
14
1.9
SSE
14
1.7
SSE
14
Energy kJ
225
177
170
133
125
94
92
68
47
32
175
88
43
247
292
243
195
1393
1675
2279
1994
1724
1341
1090
Swell 2
Height (m)
Direction
Period (s)
0.2
ENE
7
0.2
ESE
5
0.2
ESE
4
0.2
ESE
5
0.2
ENE
5
0.2
E
4
0.5
S
4
0.2
SSE
16
0.2
SSE
15
0.3
SSE
15
0.5
S
9
0.5
S
9
0.5
S
9
0.4
SSE
12
0.4
SSE
12
0.7
ESE
6
0.9
SSE
14
1.1
S
7
1
S
7
0.6
ESE
6
0.6
E
6
0.5
E
6
0.5
E
6
0.5
E
6
Energy kJ
5
2
2
2
3
2
9
24
22
42
45
41
40
50
47
39
265
120
96
29
27
18
18
18
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
12
0.2
ENE
7
0.2
ENE
7
0.2
ENE
7
0.1
E
7
0.2
ENE
7
0.2
SSE
16
0.2
E
7
0.1
E
7
0.1
E
7
0.3
SSE
14
0.4
SSE
13
0.4
SSE
13
0.1
SE
16
0.3
SSE
15
0.5
SSE
14
0.7
ESE
6
0.8
ESE
6
0.7
ESE
6
Energy kJ
6
5
5
5
1
5
25
4
1
1
38
59
55
11
44
118
39
44
39
Wind waves
Height (m)
Direction
Period (s)
0.3
SE
4
0.5
S
4
0.8
SSW
4
0.5
S
4
1.2
S
6
1.5
SSE
7
1.7
SSE
7
0.8
SSW
6
1.2
S
6
2.2
S
7
2.1
S
8
2
S
7
1.7
S
7
1.9
S
13
Energy kJ
3
6
24
10
112
189
268
50
109
453
487
434
298
1210
Nearest Offshore or Glassy
Rating
(10 max)
2
1
1
1
1
1
1
1
1
1
2
1
2
2
2
3
3
4
4
4
4
4
4
4
Distance (km)
0
0
13
10
0
0
0
9
13
13
10
10
10
10
10
0
0
0
10
10
10
0
0
0
Best forecast wave conditions in Santa Catarina - Sul
Rating
(10 max)
2
2
1
1
1
1
1
1
2
2
2
1
2
3
3
3
4
5
4
4
4
4
4
4
Best forecast wave conditions in Brazil
Rating
(10 max)
2
2
1
2
2
2
1
2
2
2
2
1
3
3
3
3
4
5
4
4
4
4
4
4
Header Global
Rating
(10 max)
7
4
8
6
4
4
5
6
5
4
5
4
5
4
4
4
4
4
4
4
4
4
4
4
  • 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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