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Surf Forecasts:
Siriu surfForecast / Santa Catarina – Sul / Brazil
48hr Weather and Surf, issued 8 pm Saturday 06 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
21.9° C
(Which is 1.5°C colder than average for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 12AM is: 1.0m 5s primary swell from a Northeast direction and 0.6m 8s secondary swell from a East-southeast direction, 0.1m 8s secondary swell from a Northeast direction (forecast issued at 08:00pm December 06). The wind direction is predicted to be cross-shore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Dec) | 3ft (0.9m) | 6s |
| Afternoon (07 Dec) | 3.5ft (1.1m) | 6s |
| Evening (07 Dec) | 3ft (0.9m) | 6s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sat 06 | Sunday 07 | Monday 08 | Tuesday 09 | |||||||||||||||||||||
| 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) (?) | 5 | 8 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 83 | 65 | 56 | 60 | 111 | 54 | 72 | 83 | 77 | 63 | 96 | 96 | 91 | 94 | 71 | 71 | 62 | 60 | 82 | 97 | 103 | 107 | 125 | 129 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 3:47AM 0.69 | 2:06PM 0.61 | 4:21AM 0.61 | 8:28AM 0.61 | 2:40PM 0.64 | 4:54AM 0.55 | 9:54AM 0.59 | |||||||||||||||||
Low Tide / height (m) | 9:26PM 0.03 | 10:59AM 0.49 | 10:13PM 0.05 | 6:24AM 0.59 | 11:38AM 0.54 | 11:06PM 0.09 | 6:41AM 0.53 | 12:16PM 0.56 | ||||||||||||||||
Sat 06 | Sunday 07 | Monday 08 | Tuesday 09 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - |
| Sunset | 7:00 | - | - | - | - | - | - | - | 7:00 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - |
 |  |  | | |  | | | |  | | | | | | | | | | |  |  |  |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 10 | 15 |
| Temp. °C | 24 | 21 | 21 | 21 | 21 | 27 | 29 | 26 | 25 | 22 | 22 | 21 | 21 | 25 | 27 | 26 | 24 | 23 | 22 | 22 | 22 | 23 | 23 | 23 |
| Feels °C (?) | 23 | 20 | 20 | 20 | 20 | 27 | 28 | 25 | 26 | 23 | 23 | 22 | 22 | 25 | 26 | 24 | 24 | 23 | 22 | 22 | 23 | 24 | 22 | 22 |
- 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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