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Surf Forecasts:
Siriu surfForecast / Santa Catarina – Sul / Brazil
48hr Weather and Surf, issued 2 pm Sunday 07 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
22.0° C
(Which is 1.4°C colder than average for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 5PM is: 1.0m 6s primary swell from a Northeast direction and 0.4m 8s secondary swell from a Southeast direction, 0.1m 11s secondary swell from a South direction (forecast issued at 02:00pm December 07). The wind direction is predicted to be cross-onshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Dec) | - | - |
| 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
Sunday 07 | Monday 08 | Tuesday 09 | Wednesday 10 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 72 | 80 | 64 | 61 | 96 | 100 | 103 | 97 | 76 | 88 | 62 | 71 | 79 | 155 | 164 | 197 | 158 | 230 | 320 | 218 | 300 | 532 | 370 | 494 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | 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 | cross | cross | cross | cross- off | cross- off | cross- off |
High Tide / height (m) | 2:06PM 0.61 | 4:21AM 0.61 | 8:28AM 0.61 | 2:40PM 0.64 | 4:54AM 0.55 | 9:54AM 0.59 | 3:21PM 0.65 | 5:32AM 0.50 | ||||||||||||||||
Low Tide / height (m) | 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 | 12:05AM 0.15 | 7:11AM 0.48 | |||||||||||||||
Sunday 07 | Monday 08 | Tuesday 09 | Wednesday 10 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:09 | - |
| Sunset | - | - | 7:00 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - | - | - | 7:01 | - | - | - | - | - |
 | |  |  | | | |  | | | |  |  | | |  | | |  | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 11 | 24 | 16 | 10 | - | - | - | - | - |
| Temp. °C | 29 | 27 | 25 | 22 | 21 | 21 | 21 | 25 | 26 | 25 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 22 | 22 | 22 | 25 |
| Feels °C (?) | 28 | 26 | 26 | 22 | 21 | 22 | 22 | 25 | 24 | 24 | 23 | 22 | 21 | 22 | 23 | 21 | 20 | 21 | 22 | 23 | 22 | 22 | 23 | 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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