Siriu Surf Forecast

/ Santa Catarina – Sul (37 surf breaks) /

Brazil (447 surf breaks) / Lat Long: (28.00° S 48.63° W)

Surf Forecasts:

Siriu surfForecast / Santa Catarina – Sul / Brazil

48hr Weather and Surf, issued 2 pm Thursday 18 Sep 2025 -03

Forecast 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 19.2° C
(Which is normal for this time of year)

How big are the waves at Siriu today?

The current surf forecast for Siriu at 5PM is: 1.7m 10s primary swell from a East direction and 1.1m 11s secondary swell from a Southeast direction (forecast issued at 02:00pm September 18). The wind direction is predicted to be cross-onshore.

Time (-03) & Date	Wave Height	Wave Period
Morning (18 Sep)	-	-
Afternoon (18 Sep)	5.5ft (1.7m)	10s
Evening (18 Sep)	6ft (1.9m)	10s

Table - waves today at Siriu. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Thursday 18				Friday 19								Saturday 20								Sunday 21
	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM	12 PM	3 PM	6 PM	9 PM	0 AM	3 AM	6 AM	9 AM
Rating (10 max)	1	0	1	2	2	2	3	1	0	0	0	1	1	2	2	1	0	0	1	2	2	1	1	2
Swell Height Map See all maps
Wave Height (m) & direction (?)	E	E	E	ENE	E	E	E	E	E	E	E	E	E	E	E	E	E	E	E	ENE	ENE	ENE	ENE	ENE
Period(s) (?)	10	10	10	10	10	10	9	9	9	9	9	8	8	8	8	8	8	9	9	9	9	9	9	9
Wave Graph (?)
kJ (?)	613	590	514	725	546	524	425	357	351	355	209	239	200	195	165	157	196	290	380	400	352	344	294	249
Wind (km/h)	NE	NE	NE	NNE	NNE	N	NNW	NNE	NE	NE	NNE	N	N	N	NNW	NE	ENE	ENE	NE	E	NNE	ENE	N	NNE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- on	cross- on	cross- on	cross- on	cross	cross	cross- off	cross	cross- on	cross- on	cross- on	cross	cross	cross- off	cross- off	cross- on	cross- on	cross- on	cross- on	glass	glass	cross- on	cross	glass
High Tide / height (m)		1:36PM 0.74			12:00AM 0.62					1:37PM 0.72				12:25AM 0.70				1:37PM 0.71				12:54AM 0.76
Low Tide / height (m)				7:00PM 0.35				6:51AM 0.01				7:19PM 0.31				7:24AM -0.01				7:40PM 0.27				7:54AM 0.01

	Thursday 18				Friday 19								Saturday 20								Sunday 21
Sunrise	-	-	-	-	-	-	-	6:07	-	-	-	-	-	-	-	6:07	-	-	-	-	-	-	-	6:05
Sunset	-	-	6:07	-	-	-	-	-	-	-	6:08	-	-	-	-	-	-	-	6:08	-	-	-	-	-

Rain (mm)	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1
Temp. °C	22	22	20	19	19	19	19	21	24	24	21	19	19	19	19	23	24	23	20	20	20	19	19	20
Feels °C (?)	21	20	20	19	19	19	19	20	21	21	20	18	18	19	19	23	24	22	21	22	22	21	19	22

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Santa Catarina - Sul

Wind Update The wind is still cross-on at Siriu (light winds from the ENE.(Wind varies from 010 to 080 degs) at Florianopolis Airport 38 km from Siriu). 1.9m 10s swell from the E with a 0.8m 12s groundswell from the SE. 2 swells combining so expect closeout sets.
2 hours 35 minutes ago Siriu

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38 km away, 2 h 35 min ago

13 km/h

ENE

0.0

19.2

Air / Water (°C)

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