Siriu surfForecast / Santa Catarina – Sul / Brazil

information circle48hr Weather and Surf, issued 2 pm Monday 18 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
20.9° C
(Which is slightly cooler than normal)

How big are the waves at Siriu today?

The current surf forecast for Siriu at 6PM is: 1.4m 7s primary swell from a South direction and 0.4m 13s secondary swell from a South-southeast direction (forecast issued at 02:00pm May 18). An open ocean swell of 1.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (-03) & DateWave HeightWave Period
Morning (18 May)--
Afternoon (18 May)5ft (1.5m)7s
Evening (18 May)5ft (1.5m)7s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Light rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 17°C on Tue morning, min 12°C on Wed night). Wind will be generally light.

Mon
18
Tuesday
19
Wednesday
20
Thu
21
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
6 AM
9 AM
Rating
(10 max)
2
1
1
1
2
2
2
5
4
3
3
4
4
3
3
3
2
2
3
5
!
!
5
5
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)
1.9
S
6
1.5
S
7
1.4
S
7
1.5
S
7
2
S
7
1.3
S
7
0.9
SSE
14
2.1
S
13
2.1
SSE
16
2.1
SSE
16
2.1
SSE
15
2
SSE
14
1.9
SSE
14
1.6
SSE
13
1.5
S
13
1.4
SSE
13
1.4
SSE
13
1.6
SSE
13
1.9
SSE
14
2.5
S
13
3
S
15
3
S
16
2.5
SSE
16
2.5
SSE
15
Wave Graph
Metric surfscale
Energy kJ
288
199
173
199
366
162
326
1556
2282
2115
1902
1621
1384
958
787
669
669
929
1341
2021
4284
4532
3415
3135
Wind (km/h)
25
SW
25
SW
20
SW
20
SW
20
SW
20
SW
15
SW
15
SW
15
S
10
S
10
S
5
SW
5
SW
5
SW
5
SW
5
SW
10
SSE
10
SSE
10
S
15
SW
10
SW
15
SW
15
WSW
15
SW
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross
cross-off
glassy
glassy
cross-off
glassy
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
3:30PM0.73m
2:11AM0.55m
4:16PM0.65m
8:00PM0.64m
2:35AM0.57m
5:10PM0.58m
9:36PM0.65m
3:05AM0.59m
Low Tide
9:18AM0.08m
11:03PM0.43m
10:05AM0.09m
6:31PM0.63m
00:01AM0.51m
11:05AM0.11m
6:10PM0.57m
00:59AM0.56m
light rain
light rain
light rain
light rain
cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
3
2
1
1
Temp °C
14
14
14
14
14
14
13
14
17
16
15
14
14
13
13
15
17
17
15
14
13
12
12
14
10
10
10
11
11
11
10
11
14
14
14
13
13
13
12
15
16
15
13
11
10
9
9
11
Swell 1
Height (m)
Direction
Period (s)
1.5
S
6
1.5
S
7
1.4
S
7
0.4
SSE
12
1.5
S
7
1.3
S
7
1.1
S
7
1.6
S
14
2.1
SSE
16
2.1
SSE
16
2.1
SSE
15
2
SSE
14
1.9
SSE
14
1.6
SSE
13
1.5
S
13
1.4
SSE
13
1.4
SSE
13
1.6
SSE
13
1.9
SSE
14
2.1
SSE
14
2.4
SSE
15
2.5
SSE
16
2.5
SSE
16
2.5
SSE
15
Energy kJ
187
199
173
50
214
162
116
961
2282
2115
1902
1621
1384
958
787
669
669
929
1341
1704
2526
3258
3415
3135
Swell 2
Height (m)
Direction
Period (s)
0.4
SSE
10
0.4
SSE
13
0.4
SSE
13
0.1
SE
16
0.3
SSE
12
0.7
SE
6
0.9
SSE
14
0.9
SSE
18
0.5
ESE
6
0.5
ESE
6
0.5
E
6
0.5
E
6
0.5
E
6
0.3
E
6
0.4
E
6
0.4
E
6
0.4
E
7
0.3
ENE
7
0.3
ENE
7
0.3
ENE
7
0.3
ENE
7
0.2
ENE
7
Energy kJ
31
59
55
11
29
32
326
486
18
18
15
16
15
5
10
11
16
9
9
9
9
5
Swell 3
Height (m)
Direction
Period (s)
0.3
SSE
14
0.1
SE
17
0.2
SSE
16
0.1
SE
11
0.3
SSE
15
0.5
SSE
14
0.6
ESE
6
0.5
ESE
6
0.2
ENE
7
0.2
ENE
7
0.2
ENE
7
Energy kJ
38
11
25
5
44
118
22
19
5
5
5
Wind waves
Height (m)
Direction
Period (s)
1.9
S
6
1.9
SSW
7
1.9
SSW
7
1.5
S
7
2
S
7
1.7
SSW
7
1.6
S
8
2.1
S
13
2.1
S
13
2.5
S
13
3
S
15
3
S
16
Energy kJ
288
322
322
199
366
319
324
1556
1507
2021
4284
4532
Nearest Offshore or Glassy
Rating
(10 max)
2
2
2
2
2
2
2
5
4
4
4
4
4
3
3
3
2
3
5
5
7
8
5
5
Distance (km)
10
10
10
10
10
0
0
0
10
10
10
0
0
0
0
0
13
13
10
0
6
6
0
0
Best forecast wave conditions in Santa Catarina - Sul
Rating
(10 max)
2
2
2
3
3
3
4
5
4
4
4
4
4
4
4
4
3
4
5
6
9
9
5
5
Best forecast wave conditions in Brazil
Rating
(10 max)
2
2
2
3
3
3
4
5
5
4
4
4
5
5
5
5
4
4
5
6
9
9
5
5
Header Global
Rating
(10 max)
5
5
4
4
4
4
4
4
5
4
5
5
5
4
5
5
4
5
5
4
4
5
5
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

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Siriu 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.


Nearest locationNearest
Nearest locationNearest
Nearest locationNearest