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Surf Forecasts:

Siriu surfForecast / Santa Catarina – Sul / Brazil

information circle12 Day Weather and Surf, issued 8 am Wednesday 19 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
20.8° C
 (Which is 1.6°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 Wednesday (Nov 19) at 9PM. The primary swell is predicted to be 2.1m and 8s period with a secondary swell of 1.7m and 8s. Another secondary swell of 0.5m and 16s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Siriu in the next 12 days are 2.1m 16s and forecast to arrive on Thursday (Nov 20) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Saturday (Nov 22) at 9AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Wed 19th Nov)7ft (2.1m) 8s
Best Surf 9PM (Wed 19th Nov)7ft (2.1m) 8s
Most Powerful 6AM (Thu 20th Nov)7ft (2.1m) 16s

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 Mostly dry. Warm (max 26°C on Fri afternoon, min 16°C on Wed night). Mainly fresh winds.

Days 3-6 Weather Summary Moderate rain (total 11mm), heaviest on Sat afternoon. Warm (max 21°C on Sat morning, min 15°C on Sun night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
3
2
0
1
0
0
0
0
1
1
2
3
3
1
0
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
S
1.4
S
1.6
S
2.2
SSE
2.2
SSE
1.4
SSE
1
S
0.8
SSE
0.7
SSE
0.7
SSE
1.1
S
0.7
S
1.6
SSE
2
S
1.7
SSE
1.5
SSE
1.6
ESE
1.1
ENE
1
E
1.2
ESE
1.2
E
Period(s) (?)978161413121212111110988876777
Wave
Graph
(?)Metric surfscale
Energy kJ (?)103179368227618866693191981451282771024615764122782429388128146
Wind
(km/h)
20
SSW
30
S
10
SW
20
NNE
30
NNE
25
N
30
N
30
NNE
20
N
20
SW
25
SSW
20
S
20
S
20
SSW
15
SSW
10
S
15
E
10
NE
15
NNE
20
ENE
15
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		crosscross-
off		crosscross-
on		crosscrosscross-
on		crosscross-
off		cross-
off		crosscross-
off		cross-
off		cross-
off		crossoncross-
on		cross-
on		cross-
on		cross
High Tide
/ height (m)
12:48PM
0.64
1:38AM
0.75
1:11PM
0.64
2:11AM
0.75
1:37PM
0.64
2:45AM
0.73
2:07PM
0.64
3:20AM
0.70
2:40PM
0.63
4:01AM
0.67
3:19PM
0.62
4:50AM
0.63
4:05PM
0.60
Low Tide
/ height (m)
7:24PM
0.09
8:12AM
0.28
7:50PM
0.07
8:46AM
0.32
8:20PM
0.07
9:22AM
0.35
8:55PM
0.08
10:04AM
0.39
9:42PM
0.11
11:01AM
0.42
10:48PM
0.14
12:12PM
0.44
12:06AM
0.16
Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Sunrise5:11--5:11--5:11--5:11--5:11--5:11--5:09--
Sunset-6:46--6:47--6:47--6:49--6:50--6:51--6:52-
clear
part cloud
clear
clear
clear
clear
clear
clear
part cloud
rain showers
rain showers
rain showers
light rain
light rain
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
Rain (mm)
---------14321-------
Temp. °C212117232318252620211919171717201918222118
Feels °C (?)181614191914212218201718151414181717191816
  • 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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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.

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