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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 Wednesday 20 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
20.6° C
(Which is 1.0°C colder than average for this time of year)How big are the waves at Siriu today?
The current surf forecast for Siriu at 5AM is: 3.5m 15s primary swell from a South direction and 2.5m 15s secondary swell from a South-southeast direction (forecast issued at 08:00pm May 20). 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 10mm), heaviest on Fri night. Very mild (max 17°C on Thu afternoon, min 12°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SSE 14 | SSE 14 | 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 | |
1360 | 1773 | 2560 | 5380 | 3397 | 3269 | 3135 | 2803 | 2409 | 2267 | 2602 | 2445 | 2411 | 2167 | 1937 | 1750 | 1677 | 1422 | 1211 | 1060 | 903 | 730 | 589 | 505 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | off | off | off | glassy | cross-on | cross-on | glassy | cross-off | off | off | glassy | glassy | cross-off | cross | |
High Tide | 5:10PM0.58m | 9:36PM0.65m | 3:05AM0.59m | 10:39PM0.66m | 3:47AM0.59m | 11:24PM0.64m | 4:48AM0.57m | |||||||||||||||||
Low Tide | 6:10PM0.57m | 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 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 3 | 1 | — | — | — | |
Temp °C | 15 | 14 | 13 | 12 | 12 | 14 | 16 | 17 | 14 | 13 | 12 | 12 | 12 | 14 | 16 | 17 | 15 | 15 | 12 | 12 | 13 | 14 | 16 | 16 |
13 | 12 | 11 | 9 | 8 | 10 | 12 | 12 | 11 | 10 | 10 | 9 | 10 | 13 | 14 | 16 | 15 | 13 | 10 | 11 | 13 | 14 | 16 | 15 | |
Swell 1 Height (m) Direction Period (s) | SSE 14 | SSE 14 | 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 | SSE 12 |
 kJ | 1360 | 1773 | 2560 | 3216 | 3397 | 3269 | 3135 | 2803 | 2409 | 2267 | 2602 | 2445 | 2411 | 2167 | 1937 | 1750 | 1677 | 1422 | 1211 | 1060 | 903 | 730 | 589 | 505 |
Swell 2 Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 9 | E 5 | E 6 | E 6 | E 6 |
| kJ | 9 | 9 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 19 | 52 | 82 | 108 |
Swell 3 Height (m) Direction Period (s) | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 10 | — | SE 6 | S 6 |
| kJ | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 18 | 20 |
Wind waves Height (m) Direction Period (s) | — | — | — | S 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | 5380 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 6 | 0 | 13 | 15 | 38 | 13 | 0 | 0 | 0 | 0 | 0 | 13 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10 |
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)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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