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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 8 pm 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 5AM is: 0.6m 10s primary swell from a South direction and 0.2m 15s secondary swell from a South-southeast direction, 0.9m 5s secondary swell from a South direction (forecast issued at 08:00pm May 17). The wind direction is predicted to be cross-offshore.
| Time (-03) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 4.5ft (1.3m) | 6s |
| Afternoon (18 May) | 4.5ft (1.3m) | 6s |
| Evening (18 May) | 5ft (1.6m) | 7s |
Table - waves today at Siriu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 24mm), heaviest during Sun night. Very mild (max 18°C on Sun night, min 13°C on Mon night). Winds decreasing (fresh winds from the SW on Mon morning, calm by Tue night). | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wednesday 20 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
S 10 | S 10 | S 10 | S 10 | S 6 | SSE 6 | SSE 6 | S 6 | S 9 | S 7 | S 7 | S 7 | SSE 14 | S 13 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | S 13 | SSE 13 | SSE 13 | SSE 13 | |
125 | 94 | 92 | 68 | 82 | 134 | 130 | 122 | 55 | 240 | 493 | 418 | 311 | 1422 | 2216 | 2115 | 1847 | 1570 | 1341 | 972 | 787 | 669 | 669 | 836 | |
Wind (km/h) | ||||||||||||||||||||||||
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 | glassy | glassy | cross-off | glassy | off | cross-off | cross-on | cross-on | |
High Tide | 1:51AM0.53m | 3:30PM0.73m | 2:11AM0.55m | 4:16PM0.65m | 8:00PM0.64m | 2:35AM0.57m | ||||||||||||||||||
Low Tide | 10:06PM0.33m | 9:18AM0.08m | 11:03PM0.43m | 10:05AM0.09m | 6:31PM0.63m | 00:01AM0.51m | 11:05AM0.11m | |||||||||||||||||
 |  | |  |  |  | | |  | | | | |  | |  |  | | | | | | | | |
 | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:50 | — | — | — | — | — | — | — | 6:50 | — | — | — |
 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 |
— | — | — | 2 | 9 | 4 | 3 | 2 | 2 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 18 | 18 | 17 | 17 | 17 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 17 | 16 | 15 | 14 | 13 | 13 | 13 | 14 | 17 | 17 |
17 | 17 | 17 | 15 | 15 | 14 | 9 | 10 | 9 | 9 | 9 | 10 | 10 | 11 | 14 | 14 | 14 | 14 | 12 | 12 | 12 | 13 | 16 | 15 | |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | S 10 | S 10 | S 10 | S 9 | S 9 | SE 6 | SSE 12 | S 7 | SSE 7 | S 7 | S 14 | SSE 16 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | S 13 | SSE 13 | SSE 13 | SSE 13 |
 kJ | 125 | 94 | 92 | 68 | 67 | 46 | 44 | 41 | 33 | 51 | 295 | 276 | 167 | 961 | 2216 | 2115 | 1847 | 1570 | 1341 | 972 | 787 | 669 | 669 | 836 |
Swell 2 Height (m) Direction Period (s) | SE 4 | ESE 4 | SSE 16 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | SSE 13 | S 9 | SE 16 | SSE 12 | SSE 14 | SSE 14 | SSE 18 | ESE 6 | ESE 6 | ESE 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 6 | E 7 |
| kJ | 3 | 2 | 25 | 24 | 22 | 42 | 38 | 59 | 55 | 11 | 48 | 118 | 265 | 486 | 29 | 30 | 29 | 28 | 20 | 19 | 18 | 12 | 12 | 15 |
Swell 3 Height (m) Direction Period (s) | ENE 5 | ENE 7 | E 7 | E 7 | E 7 | E 7 | SE 15 | SE 17 | SSE 13 | — | SSE 15 | SE 20 | ESE 6 | ESE 6 | — | — | E 8 | E 8 | — | — | ENE 8 | ENE 8 | — | — |
| kJ | 3 | 5 | 4 | 4 | 1 | 1 | 9 | 11 | 55 | — | 44 | 61 | 44 | 44 | — | — | 11 | 12 | — | — | 11 | 11 | — | — |
Wind waves Height (m) Direction Period (s) | SSW 2 | SSW 3 | S 4 | S 4 | S 6 | SSE 6 | SSE 6 | S 6 | SSW 6 | S 7 | S 7 | S 7 | S 7 | S 13 | S 13 | — | — | — | — | — | — | — | — | SSE 3 |
| kJ | 1 | 3 | 9 | 14 | 82 | 134 | 130 | 122 | 68 | 240 | 493 | 418 | 311 | 1422 | 1510 | — | — | — | — | — | — | — | — | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 13 | 0 | 15 | 13 | 13 | 15 | 10 | 10 | 10 | 10 | 10 | 0 | 0 | 10 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 13 |
Best forecast wave conditions in Santa Catarina - Sul | ||||||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||||||
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