Siriu Surf Break

Lat Long: 28.00° S 48.63° W

Siriu 48 hour detailed Surf Forecast

Issued: 2 pm 18 Aug 2026 (local time)

Forecast update in  hr  min

Today's Siriu sea temperature is
18.8° C
0.2° 

Siriu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Siriu today (18 Aug):

  • Afternoon surf: Afternoon surf (18 Aug, local time) - 5ft (1.5m), 8s period with ENE swell.
  • Evening surf: Evening surf (18 Aug, local time) - 4.5ft (1.3m), 9s period with ENE swell.

The current surf forecast for Siriu at 8PM is: 1.3m 8s primary swell from a East-northeast direction and 0.1m 10s secondary swell from a South direction (forecast issued at 02:00pm August 18). An open ocean swell of 0.7m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.

Time (-03) & DateWave HeightWave Period
Morning (18 Aug)--
Afternoon (18 Aug)5ft (1.5m)8s
Evening (18 Aug)4.5ft (1.3m)9s

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


Short Range Forecast

Some drizzle, heaviest during Wed afternoon. Warm (max 33°C on Tue afternoon, min 17°C on Thu night). Wind will be generally light.

Tue
18
Wednesday
19
Thursday
20
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
Rating
(10 max)
2
1
2
2
2
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
NE
8
1.5
ENE
8
1.4
ENE
8
1.3
ENE
9
1.3
ENE
9
1.2
ENE
8
1.1
ENE
8
1
ENE
8
0.9
ENE
8
0.9
ENE
8
0.9
ENE
8
0.9
ENE
8
0.8
ENE
8
0.9
ENE
8
0.9
ENE
8
0.9
ENE
8
0.9
ENE
8
1.1
ENE
7
0.5
S
9
0.6
ENE
7
Wave Graph
Metric surfscale
Energy kJ
481
294
284
245
245
190
153
125
113
107
83
83
77
96
96
94
94
134
42
41
Wind (km/h)
15
N
15
N
10
NW
5
SW
5
SSW
10
SSW
10
SSW
15
S
15
S
10
S
10
S
5
S
5
NE
10
NNE
10
NNE
15
NNE
20
NNE
20
NNE
15
NNE
15
N
Wind State
cross
cross
cross-off
glassy
glassy
cross-off
cross-off
cross
cross
cross
cross
cross
cross-on
cross
cross-on
cross
cross-on
cross-on
cross
cross
High Tide
4:18PM0.58m
5:03AM0.59m
4:39PM0.55m
6:01AM0.51m
12:32PM0.51m
4:54PM0.51m
Low Tide
9:51AM0.35m
9:35PM0.25m
9:21AM0.40m
10:01PM0.27m
9:02AM0.45m
2:44PM0.49m
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
light rain
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:53
5:53
 mm
1
Temp °C
31
33
28
24
22
19
19
20
22
20
19
18
18
18
18
19
23
23
20
19
Feels °C
30
32
29
26
23
19
19
20
22
20
19
19
19
19
18
19
21
20
19
18
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Siriu surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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