Using Surf-Forecast’s Historical Surf Data To Find The Cleanest Waves On Earth
Our historical stats breakdown what waves are offshore almost all the time.
- Forecast
- Maps
- Live
- Weather State
- Spot Information
Siriu Surf Forecast
/ Santa Catarina – Sul (37 surf breaks) /
Surf Forecasts:
Siriu surfForecast / Santa Catarina – Sul / Brazil
48hr Weather and Surf, issued 8 am Wednesday 21 Jan 2026 -03Forecast 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
25.6° C
(Which is normal for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 2PM is: 1.1m 9s primary swell from a Southeast direction and 0.7m 10s secondary swell from a South direction (forecast issued at 08:00am January 21). The wind direction is predicted to be onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jan) | 3.5ft (1.1m) | 8s |
| Afternoon (21 Jan) | 4ft (1.2m) | 9s |
| Evening (21 Jan) | 4.5ft (1.3m) | 9s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 21 | Thursday 22 | Friday 23 | Sat 24 | |||||||||||||||||||||
| 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 138 | 145 | 177 | 225 | 281 | 275 | 293 | 305 | 279 | 284 | 328 | 368 | 341 | 334 | 288 | 267 | 204 | 200 | 226 | 167 | 406 | 297 | 250 | 207 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | on | on | on | cross- on | cross- on | cross- on | glass | cross- on | on | on | cross- on | on | glass | cross- off | cross- off | cross | cross- on | cross- on | cross- on | cross- on | glass | cross- off |
High Tide / height (m) | 3:44AM 0.74 | 3:07PM 0.77 | 4:13AM 0.70 | 3:42PM 0.75 | 4:44AM 0.65 | 4:21PM 0.71 | ||||||||||||||||||
Low Tide / height (m) | 10:13AM 0.32 | 10:28PM 0.01 | 10:51AM 0.34 | 11:12PM 0.07 | 11:34AM 0.36 | 12:05AM 0.16 | ||||||||||||||||||
Wednesday 21 | Thursday 22 | Friday 23 | Sat 24 | |||||||||||||||||||||
| Sunrise | 5:35 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 7:14 | - | - | - | - | - | - | - | 7:13 | - | - | - | - | - | - | - | 7:13 | - | - | - |
 |  |  | |  |  |  | | | | | | |  | | | | | | |  |  |  | | |
Rain (mm) | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 4 | 2 |
| Temp. °C | 20 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 20 | 23 | 23 | 23 | 22 | 21 | 21 | 20 | 18 | 22 | 24 | 25 | 23 | 23 | 22 | 22 |
| Feels °C (?) | 21 | 23 | 21 | 20 | 21 | 21 | 21 | 21 | 20 | 22 | 22 | 22 | 21 | 21 | 22 | 21 | 17 | 22 | 23 | 25 | 24 | 25 | 24 | 24 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
The World’s Most Inconsistent Waves
Huntington, Dribbleton, Virginia, Holland and the Superbank! We recently had a look at the world’s most consistent waves. This was based on the combination of swells and wind directed at 7,000 surf spots, as compiled from our data since 2006. Those stats, represented in easy-to-read graphics, are located under each wave’s spot guides, with historical swell and wind breakdowns available by month, season, and year. There is also an offshore filter, which shows how often the swells come with clean
Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Read more
Discover more articles and updates in the Greenroom.
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