Snow-ForecastSnow-ForecastMountain-ForecastMountain-ForecastTide-ForecastTide-ForecastWeather-ForecastWeather-Forecast
Search by country, region, or break
Search by country, region, or break

Quick Links

Surf Forecasts:

Siriu surfForecast / Santa Catarina – Sul / Brazil

information circle12 Day Weather and Surf, issued 2 pm Sunday 23 Nov 2025 -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
20.2° C
 (Which is 2.5°C colder than average for this time of year)

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 (Nov 23) at 9PM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 0.9m and 6s. Another secondary swell of 1.2m and 6s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Siriu in the next 12 days are 1.8m 9s and forecast to arrive on Wednesday (Nov 26) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 5s period and expected on Sunday (Nov 30) at 12PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Sun 23rd Nov)4.5ft (1.4m) 8s
Best Surf 9PM (Sun 23rd Nov)4.5ft (1.4m) 8s
Most Powerful 3PM (Wed 26th Nov)6ft (1.8m) 9s

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 Moderate rain (total 17mm), heaviest on Mon afternoon. Warm (max 22°C on Wed morning, min 17°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 27°C on Sat morning, min 17°C on Thu night). Winds increasing (light winds from the E on Wed night, fresh winds from the NNE by Sat morning).

Sun
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
2
2
1
1
2
2
0
1
1
1
1
0
0
1
0
0
0
0
0
0
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
2.2
SE
1.3
SSE
1.7
ESE
1.5
ESE
1.6
ESE
1.8
ESE
1.8
ESE
1.7
ESE
1.5
E
1.8
E
1.6
ESE
1.4
ESE
1.4
E
1.3
E
1.2
ESE
1.2
ESE
1.2
ESE
1.1
ESE
1.4
NE
0.9
ESE
0.7
ESE
Period(s) (?)9877788889989881099699
Wave
Graph
(?)Metric surfscale
Energy kJ (?)72720626220626941643741230951739428429024519026322719714611368
Wind
(km/h)
15
SE
5
SSE
10
ESE
10
S
10
SW
15
SSW
15
SSE
10
S
10
S
15
SE
10
E
15
NE
20
ENE
15
N
20
NNE
25
NE
25
N
30
NNE
30
NNE
15
N
5
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		glasscross-
on		crosscross-
off		cross-
off		cross-
on		crosscrosscross-
on		oncross-
on		cross-
on		crosscross-
on		cross-
on		crosscrosscross-
on		crossglass
High Tide
/ height (m)
4:01AM
0.67
3:19PM
0.62
4:50AM
0.63
4:05PM
0.60
5:56AM
0.59
4:58PM
0.56
10:01AM
0.60
6:08PM
0.53
10:47AM
0.65
7:53PM
0.52
11:25AM
0.68
10:19PM
0.57
11:58AM
0.68
Low Tide
/ height (m)
9:42PM
0.11
11:01AM
0.42
10:48PM
0.14
12:12PM
0.44
12:06AM
0.16
1:26PM
0.44
1:23AM
0.17
2:37PM
0.41
2:35AM
0.15
3:42PM
0.37
3:42AM
0.13
4:37PM
0.32
4:46AM
0.11
Sun
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunrise--5:11--5:09--5:09--5:09--5:09--5:09--5:09
Sunset6:50--6:51--6:52--6:52--6:52--6:53--6:54--
light rain
light rain
light rain
mod rain
light rain
part cloud
part cloud
part cloud
part cloud
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
part cloud
Rain (mm)
35171--------------1-
Temp. °C181819181821212022221922221824231927262226
Feels °C (?)171820181820202121211919191620201724242327
  • 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

Latest Updates

Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Ben Mondy

Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.

Feel that? If you are in the northern hemisphere, you will have had that first bite of winter. The lick of a frost, the chill of a cold offshore breeze and the sound of winter swells pounding the shores. If you are near the mountains, your favourite jackets, gloves, and footwear might get dusted off and prepped for battle. And in that beautiful Venn diagram, you will find PrimaLoft. They have spent over 40 years developing innovative insulations that have powered your warmest winter gear. In t

Read more

Read more

Discover more articles and updates in the Greenroom.

submit an eyeball surf report

Quick surf report for Siriu:

join our community of surf reporters

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

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.

Nearest locationNearest
Nearest locationNearest
Nearest locationNearest