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Surf Forecasts:
Siriu surfForecast / Santa Catarina – Sul / Brazil
48hr Weather and Surf, issued 8 pm Friday 05 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
21.3° C
(Which is 2.1°C colder than average for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 1AM is: 0.8m 8s primary swell from a East-southeast direction and 0.3m 7s secondary swell from a South-southeast direction, 0.8m 4s secondary swell from a Northeast direction (forecast issued at 08:00pm December 05). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (06 Dec) | 2.5ft (0.7m) | 8s |
| Afternoon (06 Dec) | 4ft (1.2m) | 5s |
| Evening (06 Dec) | 2.5ft (0.7m) | 8s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Fri 05 | Saturday 06 | Sunday 07 | Monday 08 | |||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 5 | 5 | 8 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 76 | 76 | 75 | 73 | 54 | 52 | 54 | 74 | 77 | 60 | 54 | 60 | 119 | 66 | 66 | 92 | 86 | 63 | 113 | 116 | 111 | 111 | 91 | 85 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- on | cross- on | cross- on |
High Tide / height (m) | 3:11AM 0.75 | 1:38PM 0.56 | 3:47AM 0.69 | 2:06PM 0.61 | 4:21AM 0.61 | 8:28AM 0.61 | 2:40PM 0.64 | |||||||||||||||||
Low Tide / height (m) | 8:44PM 0.03 | 10:17AM 0.42 | 9:26PM 0.03 | 10:59AM 0.49 | 10:13PM 0.05 | 6:24AM 0.59 | 11:38AM 0.54 | |||||||||||||||||
Fri 05 | Saturday 06 | Sunday 07 | Monday 08 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - |
| Sunset | 6:59 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - |
 |  | | | | | | | |  |  | |  | | | |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 23 | 20 | 19 | 19 | 19 | 24 | 28 | 26 | 23 | 21 | 20 | 20 | 20 | 26 | 29 | 27 | 25 | 22 | 21 | 20 | 21 | 25 | 27 | 26 |
| Feels °C (?) | 21 | 19 | 17 | 18 | 17 | 21 | 25 | 24 | 22 | 20 | 19 | 19 | 18 | 24 | 27 | 26 | 25 | 22 | 21 | 20 | 21 | 24 | 25 | 24 |
- 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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