Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
- 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 pm Monday 01 Dec 2025 -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
20.4° C
(Which is 2.7°C colder than average for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 10PM is: 0.8m 9s primary swell from a South direction and 0.3m 8s secondary swell from a East-southeast direction, 0.8m 5s secondary swell from a East-northeast direction (forecast issued at 08:00pm December 01). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 Dec) | - | - |
| Afternoon (01 Dec) | - | - |
| Evening (01 Dec) | 2.5ft (0.8m) | 9s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 9 | 6 | 6 | 6 | 6 | 10 | 10 | 11 | 11 | 11 | 11 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 101 | 99 | 74 | 50 | 73 | 124 | 110 | 139 | 167 | 91 | 91 | 233 | 143 | 164 | 188 | 187 | 193 | 203 | 225 | 188 | 186 | 156 | 139 | 118 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross- off | cross | cross | glass | cross- on | cross | cross- off | cross- off | cross- off | cross- off | off | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross | cross- on |
High Tide / height (m) | 12:18AM 0.71 | 12:43PM 0.60 | 1:05AM 0.77 | 12:52PM 0.55 | 1:49AM 0.79 | 1:02PM 0.53 | ||||||||||||||||||
Low Tide / height (m) | 6:09PM 0.21 | 6:47AM 0.13 | 6:49PM 0.15 | 7:44AM 0.18 | 7:27PM 0.10 | 8:39AM 0.25 | ||||||||||||||||||
Mon 01 | Tuesday 02 | Wednesday 03 | Thursday 04 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - |
| Sunset | 6:55 | - | - | - | - | - | - | - | 6:57 | - | - | - | - | - | - | - | 6:58 | - | - | - | - | - | - | - |
 |  | |  |  |  |  | | | |  | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | 2 | 3 | - | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 21 | 21 | 21 | 20 | 22 | 25 | 23 | 23 | 22 | 21 | 20 | 20 | 23 | 23 | 23 | 22 | 19 | 19 | 20 | 19 | 21 | 23 | 23 |
| Feels °C (?) | 23 | 22 | 23 | 22 | 22 | 25 | 27 | 25 | 24 | 23 | 22 | 21 | 21 | 23 | 20 | 21 | 20 | 17 | 18 | 19 | 18 | 20 | 21 | 22 |
- 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
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
5 Reasons Why Costa Rica Is A Surfer (and Non Surfer) Paradise
With or without a surfboard, Costa Rica is a bucket list destination that has shown what a nation is capable of when nature is put first.
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