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Surf Forecasts:

Siriu surfForecast / Santa Catarina – Sul / Brazil

information circle12 Day Weather and Surf, issued 2 pm Saturday 10 Jan 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
24.6° C
 (Which is slightly cooler than normal)

Best Forecast Surf Conditions for Siriu this week:

The surf forecast for Siriu over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Jan 11) at 12AM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Siriu in the next 12 days are 1.9m 8s and forecast to arrive on Friday (Jan 16) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Jan 14) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sun 11th Jan)3.5ft (1.1m) 7s
Best Surf 9PM (Sun 11th Jan)5ft (1.6m) 8s
Most Powerful 3AM (Fri 16th Jan)6ft (1.9m) 8s

Table - best surf conditions forecast for Siriu over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 25mm), heaviest during Sat night. Warm (max 29°C on Tue morning, min 22°C on Sun night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 6mm), mostly falling on Tue afternoon. Warm (max 30°C on Fri morning, min 23°C on Tue night). Wind will be generally light.

Sat
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
1
2
2
3
2
0
1
0
0
0
0
0
2
1
0
2
1
0
2
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
SSE
1.1
ENE
1.2
ENE
1.2
ENE
1.8
NE
1.2
ENE
1.1
ENE
1.1
ENE
1.1
ENE
1.3
ENE
1.2
ENE
1.2
ENE
1.3
ENE
1.5
ENE
1.6
ENE
1.4
ENE
1.7
NE
1.7
NE
1.4
ENE
1.3
ENE
1.2
ENE
Period(s) (?)1078888888888888888888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)131111170170449181146138149183174176215300302238381362238206176
Wind
(km/h)
25
NNE
5
NNE
10
NNW
5
SSW
15
NNW
5
SSE
10
NE
10
SW
10
NNE
25
NE
15
N
15
NNE
25
NE
10
N
20
NNE
30
NE
15
NNE
20
NNE
20
NE
5
WNW
15
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		glasscross-
off		cross-
off		cross-
off		glasscross-
on		cross-
off		cross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on		offcross-
on
High Tide
/ height (m)
5:48PM
0.57
6:19AM
0.50
7:10PM 11:28PM
0.50 0.47
7:13AM
0.47
12:11AM
0.54
9:36AM
0.45
12:41AM
0.61
11:24AM
0.48
1:08AM
0.67
12:04PM
0.53
1:34AM
0.72
12:36PM
0.57
2:00AM
0.75
Low Tide
/ height (m)
1:59AM
0.36
2:29PM
0.36
10:22PM
0.46
3:33AM
0.40
3:52PM
0.30
5:11AM
0.40
5:00PM
0.24
6:21AM
0.37
5:54PM
0.17
7:05AM
0.34
6:38PM
0.11
7:39AM
0.31
7:18PM
0.05
8:10AM
0.30
Sat
10
Sunday
11
Monday
12
Tuesday
13
Wednesday
14
Thursday
15
Friday
16
Sunrise--5:28--5:28--5:30--5:31--5:31--5:31--5:33
Sunset7:15--7:15--7:15--7:15--7:15--7:15--7:15--
cloud
thunderstorm
part cloud
thunderstorm
mod rain
thunderstorm
cloud
thunderstorm
part cloud
rain showers
part cloud
part cloud
rain showers
thunderstorm
part cloud
clear
thunderstorm
clear
thunderstorm
part cloud
clear
Rain (mm)
-13-271-2-3--11--1-7--
Temp. °C282528252325272329292329282429282530292429
Feels °C (?)282729282629302628292428282629282730302630
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Latest Updates

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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.

View detailed surf forecast for Siriu at:
surf-forecast.com

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Information about the Siriu Surf forecast

The above surf forecast table for Siriu provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Siriu can be found by selecting the local surf guide option on the grey menu. Our Siriu 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 (Siriu) 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 Siriu 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.

Siriu is 27 km (17 miles) from Imbituba. If you plan a holiday in Santa Catarina - Sul, look for hotels and other accommodation in Imbituba. Imbituba has rooms for a wide range of budgets as well as car hire and transport links.

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