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Siriu Surf Forecast
/ Santa Catarina – Sul (37 surf breaks) /
Surf Forecasts:
Siriu surfForecast / Santa Catarina – Sul / Brazil
48hr Weather and Surf, issued 2 am Thursday 21 May 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
20.4° C
(Which is 1.1°C colder than average for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 10AM is: 3.0m 14s primary swell from a South-southeast direction (forecast issued at 02:00am May 21). The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 10ft (3.0m) | 14s |
| Afternoon (21 May) | 8ft (2.5m) | 14s |
| Evening (21 May) | 8ft (2.5m) | 14s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 16mm), heaviest on Fri night. Very mild (max 17°C on Thu afternoon, min 12°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSE 15 | S 15 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | |
2560 | 4411 | 3640 | 3269 | 3135 | 2803 | 2409 | 2267 | 2541 | 2445 | 2411 | 2167 | 1937 | 1750 | 1677 | 1422 | 1211 | 1060 | 980 | 730 | 589 | 505 | 486 | 411 | |
Wind (km/h) | ||||||||||||||||||||||||
off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | off | off | off | glassy | cross-on | cross-on | off | off | off | glassy | glassy | glassy | glassy | cross-off | cross-off | cross-off | |
High Tide | 9:36PM0.65m | 3:05AM0.59m | 10:39PM0.66m | 3:47AM0.59m | 11:24PM0.64m | 4:48AM0.57m | ||||||||||||||||||
Low Tide | 00:59AM0.56m | 12:14PM0.14m | 1:57AM0.57m | 1:26PM0.17m | 2:50AM0.55m | 2:35PM0.19m | ||||||||||||||||||
 | | |  | | | | |  |  | |  |  | | | |  | | | |  | | |  | |
 | — | — | 6:50 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — |
 | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:29 | — | — | — | — | — | — | — | 5:29 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 2 | — | 1 | 1 | 4 | 2 | |
Temp °C | 13 | 12 | 12 | 14 | 16 | 17 | 14 | 13 | 12 | 12 | 12 | 14 | 16 | 17 | 16 | 15 | 13 | 12 | 12 | 14 | 14 | 15 | 15 | 15 |
11 | 9 | 8 | 10 | 12 | 12 | 10 | 10 | 10 | 9 | 10 | 13 | 14 | 16 | 16 | 14 | 11 | 12 | 12 | 15 | 14 | 15 | 15 | 14 | |
Swell 1 Height (m) Direction Period (s) | SSE 15 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | SSE 12 | E 7 | E 7 | E 8 |
 kJ | 2560 | 3216 | 3640 | 3269 | 3135 | 2803 | 2409 | 2267 | 2541 | 2445 | 2411 | 2167 | 1937 | 1750 | 1677 | 1422 | 1211 | 1060 | 980 | 730 | 589 | 179 | 269 | 294 |
Swell 2 Height (m) Direction Period (s) | ENE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 9 | E 9 | E 9 | ESE 6 | ESE 6 | SSE 12 | SSE 12 | SSE 12 |
| kJ | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 36 | 68 | 505 | 486 | 411 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 10 | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | S 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 4 |
| kJ | — | 4411 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 14 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 6 | 6 | 13 | 23 | 38 | 13 | 0 | 0 | 0 | 0 | 0 | 13 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Santa Catarina - Sul | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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