Siriu Surf Break

Lat Long: 28.00° S 48.63° W

Siriu 48 hour detailed Surf Forecast

Issued: 8 am 18 Sep 2026 (local time)

Forecast update in  hr  min

Today's Siriu sea temperature is
16.5°C
2.7° 

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 Sep):

  • Morning surf: Morning surf (18 Sep, local time) - 3ft (0.9m), 10s period with SSE swell.
  • Afternoon surf: Afternoon surf (18 Sep, local time) - 3ft (0.9m), 9s period with SSE swell.
  • Evening surf: Evening surf (18 Sep, local time) - 2.5ft (0.8m), 9s period with SSE swell.

The current surf forecast for Siriu at 1PM is: 0.9m 10s primary swell from a South-southeast direction and 0.4m 10s secondary swell from a East direction, 0.5m 4s secondary swell from a Northeast direction (forecast issued at 08:00am September 18). The wind direction is predicted to be cross-onshore.

Time (-03) & DateWave HeightWave Period
Morning (18 Sep)3ft (0.9m)10s
Afternoon (18 Sep)3ft (0.9m)9s
Evening (18 Sep)2.5ft (0.8m)9s

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


Short Range Forecast

Heavy rain (total 52mm), heaviest during Sat night. Warm (max 22°C on Sun afternoon, min 18°C on Fri morning). Winds decreasing (fresh winds from the NNE on Sat night, light winds from the SSW by Sun night).

Friday
18
Saturday
19
Sunday
20
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
6 PM
9 PM
Rating
(10 max)
2
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
1
2
!
2
!
!
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
SSE
10
0.9
SSE
10
0.9
SSE
10
0.9
SSE
9
0.9
SSE
9
0.8
SSE
9
0.8
SSE
9
0.7
SSE
9
1
NE
7
1.4
ENE
7
1.4
ENE
7
1.4
ENE
7
1.7
ENE
7
1.9
ENE
7
2.4
ENE
8
2.5
ENE
8
2.5
ENE
9
2.5
ENE
9
3.5
NE
9
2.5
ENE
10
3.5
NE
10
3
NE
10
Wave Graph
Metric surfscale
Energy kJ
209
169
163
147
124
113
113
88
86
186
191
191
262
376
661
979
1084
1109
1993
1288
2037
1947
Wind (km/h)
10
N
10
NNE
20
NNE
25
NE
20
NE
15
NNE
15
NNE
15
NNE
20
NE
15
NE
15
NE
20
NE
20
NE
25
NE
30
NNE
30
NNE
25
NNE
20
NNE
25
N
20
NNE
20
N
15
N
Wind State
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross
cross
High Tide
5:37AM0.51m
12:07PM0.54m
3:55PM0.52m
11:52PM0.30m
12:05PM0.59m
11:20PM0.37m
12:15PM0.64m
Low Tide
8:21AM0.46m
2:52PM0.52m
9:45PM0.29m
1:59AM0.29m
9:41PM0.37m
3:45AM0.24m
5:46PM0.40m
part cloud
part cloud
part cloud
clear
part cloud
cloud
light rain
light rain
light rain
light rain
light rain
light rain
mod rain
heavy rain
mod rain
light rain
light rain
light rain
cloud
part cloud
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:07
6:08
6:08
 mm
1
1
1
2
2
4
8
13
10
4
2
1
1
1
Temp °C
15
18
21
21
19
18
18
18
18
18
18
18
18
18
18
18
19
19
20
22
21
20
Feels °C
13
16
18
17
17
16
16
17
16
16
16
16
16
15
13
14
16
18
18
21
20
20
  • 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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