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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 pm Monday 18 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
20.9° C
(Which is slightly cooler than normal)How big are the waves at Siriu today?
The current surf forecast for Siriu at 6PM is: 1.4m 7s primary swell from a South direction and 0.4m 13s secondary swell from a South-southeast direction (forecast issued at 02:00pm May 18). An open ocean swell of 1.9m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | - | - |
| Afternoon (18 May) | 5ft (1.5m) | 7s |
| Evening (18 May) | 5ft (1.5m) | 7s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 4mm), mostly falling on Mon afternoon. Very mild (max 17°C on Tue morning, min 12°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 6 | S 7 | S 7 | S 7 | S 7 | S 7 | SSE 14 | S 13 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | S 13 | SSE 13 | SSE 13 | SSE 13 | SSE 14 | S 13 | S 15 | S 16 | SSE 16 | SSE 15 | |
288 | 199 | 173 | 199 | 366 | 162 | 326 | 1556 | 2282 | 2115 | 1902 | 1621 | 1384 | 958 | 787 | 669 | 669 | 929 | 1341 | 2021 | 4284 | 4532 | 3415 | 3135 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | glassy | glassy | cross-off | glassy | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 3:30PM0.73m | 2:11AM0.55m | 4:16PM0.65m | 8:00PM0.64m | 2:35AM0.57m | 5:10PM0.58m | 9:36PM0.65m | 3:05AM0.59m | ||||||||||||||||
Low Tide | 9:18AM0.08m | 11:03PM0.43m | 10:05AM0.09m | 6:31PM0.63m | 00:01AM0.51m | 11:05AM0.11m | 6:10PM0.57m | 00:59AM0.56m | ||||||||||||||||
 | |  | |  |  | |  | | |  | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:50 | — |
 | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | 5:30 |
3 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 14 | 17 | 16 | 15 | 14 | 14 | 13 | 13 | 15 | 17 | 17 | 15 | 14 | 13 | 12 | 12 | 14 |
10 | 10 | 10 | 11 | 11 | 11 | 10 | 11 | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 15 | 16 | 15 | 13 | 11 | 10 | 9 | 9 | 11 | |
Swell 1 Height (m) Direction Period (s) | S 6 | S 7 | S 7 | SSE 12 | S 7 | S 7 | S 7 | S 14 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | S 13 | SSE 13 | SSE 13 | SSE 13 | SSE 14 | SSE 14 | SSE 15 | SSE 16 | SSE 16 | SSE 15 |
 kJ | 187 | 199 | 173 | 50 | 214 | 162 | 116 | 961 | 2282 | 2115 | 1902 | 1621 | 1384 | 958 | 787 | 669 | 669 | 929 | 1341 | 1704 | 2526 | 3258 | 3415 | 3135 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 13 | SSE 13 | SE 16 | SSE 12 | SE 6 | SSE 14 | SSE 18 | ESE 6 | ESE 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | — | — |
| kJ | 31 | 59 | 55 | 11 | 29 | 32 | 326 | 486 | 18 | 18 | 15 | 16 | 15 | 5 | 10 | 11 | 16 | 9 | 9 | 9 | 9 | 5 | — | — |
Swell 3 Height (m) Direction Period (s) | SSE 14 | SE 17 | SSE 16 | SE 11 | SSE 15 | SSE 14 | ESE 6 | ESE 6 | — | — | — | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | — | — | — | — | — | — |
| kJ | 38 | 11 | 25 | 5 | 44 | 118 | 22 | 19 | — | — | — | 5 | 5 | 5 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 6 | SSW 7 | SSW 7 | S 7 | S 7 | SSW 7 | S 8 | S 13 | S 13 | — | — | — | — | — | — | — | — | — | — | S 13 | S 15 | S 16 | — | — |
| kJ | 288 | 322 | 322 | 199 | 366 | 319 | 324 | 1556 | 1507 | — | — | — | — | — | — | — | — | — | — | 2021 | 4284 | 4532 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 10 | 10 | 10 | 10 | 10 | 0 | 0 | 0 | 10 | 10 | 10 | 0 | 0 | 0 | 0 | 0 | 13 | 13 | 10 | 0 | 6 | 6 | 0 | 0 |
Best forecast wave conditions in Santa Catarina - Sul | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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