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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 Sunday 17 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
21.3° C
(Which is slightly cooler than normal)How big are the waves at Siriu today?
The current surf forecast for Siriu at 7AM is: 1.0m 10s primary swell from a South direction and 0.2m 7s secondary swell from a East-northeast direction (forecast issued at 02:00am May 17). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 3ft (0.9m) | 10s |
| Afternoon (17 May) | 2.5ft (0.8m) | 10s |
| Evening (17 May) | 2.5ft (0.7m) | 10s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 20mm), heaviest during Sun night. Warm (max 21°C on Sun morning, min 13°C on Mon night). Winds decreasing (fresh winds from the SW on Mon afternoon, calm by Tue night). | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
S 11 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | S 10 | S 10 | S 10 | S 10 | S 7 | SSE 7 | SE 7 | SSE 6 | S 6 | S 7 | S 8 | S 7 | SSE 14 | SSE 18 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | |
229 | 229 | 225 | 177 | 170 | 133 | 125 | 94 | 92 | 68 | 130 | 262 | 114 | 149 | 109 | 568 | 548 | 475 | 311 | 1231 | 2189 | 2279 | 2048 | 1724 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | glassy | cross-off | cross-off | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | |
High Tide | 2:47PM0.78m | 1:51AM0.53m | 3:30PM0.73m | 2:11AM0.55m | 4:16PM0.65m | 8:00PM0.64m | ||||||||||||||||||
Low Tide | 8:39AM0.09m | 10:06PM0.33m | 9:18AM0.08m | 11:03PM0.43m | 10:05AM0.09m | 6:31PM0.63m | ||||||||||||||||||
 |  | |  |  | |  |  | | | |  | | | | |  | | | | | | | | |
 | — | — | 6:48 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — |
 | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — |
— | — | — | — | — | — | — | 4 | 1 | 2 | 3 | 3 | 2 | 2 | 1 | 1 | 1 | — | — | — | — | — | — | — | |
Temp °C | 18 | 18 | 18 | 18 | 21 | 19 | 19 | 18 | 18 | 17 | 17 | 17 | 15 | 14 | 14 | 14 | 13 | 13 | 14 | 15 | 17 | 17 | 16 | 15 |
19 | 20 | 19 | 18 | 22 | 19 | 19 | 17 | 17 | 16 | 15 | 15 | 11 | 9 | 10 | 10 | 9 | 9 | 11 | 12 | 14 | 15 | 15 | 14 | |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | S 10 | SSE 10 | SSE 10 | SSE 10 | S 10 | S 10 | S 10 | S 10 | S 10 | SSE 15 | SE 7 | SSE 6 | ESE 6 | S 8 | SSE 8 | S 7 | S 7 | SSE 18 | SSE 16 | SSE 15 | SSE 15 | SSE 14 |
 kJ | 229 | 229 | 225 | 177 | 170 | 133 | 125 | 94 | 92 | 68 | 47 | 42 | 114 | 149 | 54 | 283 | 336 | 243 | 168 | 1231 | 2189 | 2279 | 2048 | 1724 |
Swell 2 Height (m) Direction Period (s) | E 4 | E 7 | ENE 7 | ESE 5 | ESE 4 | ENE 7 | ENE 5 | E 4 | SSE 16 | S 5 | SSE 15 | NE 7 | S 7 | S 9 | S 8 | ESE 7 | SSE 15 | ESE 6 | SSE 14 | S 7 | ESE 6 | ESE 6 | E 6 | E 6 |
| kJ | 1 | 4 | 5 | 2 | 2 | 5 | 3 | 1 | 25 | 17 | 22 | 2 | 102 | 41 | 69 | 50 | 43 | 31 | 269 | 116 | 31 | 26 | 24 | 18 |
Swell 3 Height (m) Direction Period (s) | E 7 | SE 12 | SE 12 | ENE 7 | ENE 7 | ESE 5 | E 7 | E 7 | E 7 | SSE 16 | E 7 | — | S 9 | SSE 13 | SSE 13 | SSE 12 | S 12 | SSE 14 | ESE 6 | ESE 6 | — | — | — | — |
| kJ | 4 | 6 | 6 | 5 | 5 | 2 | 1 | 4 | 4 | 24 | 1 | — | 60 | 59 | 33 | 51 | 11 | 82 | 33 | 33 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SE 4 | S 3 | S 5 | SSW 5 | S 7 | SSE 7 | SSW 7 | SSW 9 | S 6 | S 7 | S 8 | S 7 | S 7 | S 13 | — | — | — | — |
| kJ | — | — | — | — | — | — | 3 | 6 | 15 | 33 | 130 | 262 | 121 | 326 | 109 | 568 | 548 | 475 | 311 | 1210 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 9 | 10 | 0 | 0 | 0 | 0 | 13 | 13 | 15 | 15 | 10 | 10 | 10 | 10 | 0 | 0 | 10 | 10 | 10 | 0 |
Best forecast wave conditions in Santa Catarina - Sul | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wind Speed (km/h)
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Ocean Swells (m)- Wind Speed (km/h)
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