Siriu Surf Break

Lat Long: 28.00° S 48.63° W

Siriu Surf Forecast and Surf Report

Issued: 2 am 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Siriu sea temperature is
19.3°C
0.6° 

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


Siriu surf forecast from 23 Aug 2026:

  • Best quality surf: Sunday 23 Aug, 9PM (local time) - 8ft (2.5m), 14s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 9AM (local time) - 8ft (2.5m), 14s period, SSE swell with 2,541 kJ wave energy.
  • Next surfable swell (1★+): Sunday 23 Aug, 9AM (local time) - 5.5ft (1.7m), 11s period with S swell.

Best Forecast Surf Conditions for Siriu this week:

The surf forecast for Siriu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 9AM. The primary swell is predicted to be 1.7m and 11s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Siriu in the next 16 days are 2.5m 14s and forecast to arrive on Monday (Aug 24) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Friday (Aug 28) at 3AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sun 23rd Aug)5.5ft (1.7m) 11s
Best Surf 9PM (Sun 23rd Aug)8ft (2.5m) 14s
Most Powerful 9AM (Mon 24th Aug)8ft (2.5m) 14s

Table - best surf conditions forecast for Siriu over the next 16 days.


The Lowdown

Alright, Rusty here again. Let's have a look at the next 16 days out at Siriu. The water's sitting right at 67°F, which is just about normal for the season.

The forecast has a few clean windows, but it's mostly about picking your moment. There's a big, powerful swell on the horizon for early September, but it's a week away and I'll tell you more about that in a bit.

The Weekend & Early Next Week (Aug 23-26)

Starting with Sunday morning, we have some clean conditions with a light offshore breeze and a 6ft south swell. There's not a ton of energy behind it, but it's a perfectly surfable wave for a beginner. Later in the day, it gets a little bumpier as the wind turns onshore.

Monday morning is the real deal, though. The ocean will be glassy with a solid 8ft, 14-second period swell from the south-southeast. This is a powerful groundswell with plenty of energy. The surf will be clean and lined up. It's a bit more size, so you should have some experience, but this is the pick of the first week. The crowd will be out in full force. Tuesday sees the size drop to around 6ft and the wind gets a bit tricky, making things lumpy.

Mid-Week Lull & Windy Days (Aug 27-31)

The rest of the week is a bit of a fight. Wednesday and Thursday have some bigger, longer-period swell, but the wind is strong and from the NNE, which is messing it all up. It'll be cross-chopped and blown out. Not worth the hassle. Friday drops in size and the period shortens, but the wind is still howling. It's going to be frustrating. The weekend, Aug 30 and 31, brings it right down. The swell is small, around 5ft, but it's clean. Glassy on Sunday afternoon, light winds on Monday morning. These are small, fun days, but the energy is weak.

The Second Week (Sep 1 - Sep 7)

Next week starts off clean but small, with a 5ft swell on Tuesday. But the big one is Wednesday, September 2nd. The charts are showing a serious 10ft to 12ft southerly swell with favorable light winds. The energy reading is massive. This is a big, powerful beach break, and it’s going to be way overhead. This will likely be more interesting for the kite-surfers than us paddle surfers, as it might be a bit of a washing machine at the takeoff zone. Again, it's over a week out, so this is promising, but we need to keep an eye on it. After that, it looks like it fades out. We have a few small, clean days but nothing with any power. We finish the period on Sep 7 with almost nothing on the menu.

So, to sum it up. The two standouts are Monday, Aug 24th for the clean, powerful swell, and Wednesday, Sep 2nd for the big, expert-level stuff. Pick your days, and I'll see you out there.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Tue afternoon, min 10°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Fri afternoon, min 17°C on Wed night). Winds decreasing (fresh winds from the NNE on Thu afternoon, light winds from the N by Fri night).

Sunday
23
Monday
24
Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
4
4
2
4
2
0
3
2
1
2
2
1
0
1
2
1
1
1
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.7
S
11
2.1
SSE
12
2.5
SSE
13
2.5
SSE
14
2.4
SSE
14
2
SSE
13
1.8
SSE
13
1.8
SSE
12
1.4
SE
16
2.2
SSE
15
2.1
SSE
14
1.7
SSE
14
1.5
SSE
13
1.3
SSE
13
0.9
SSE
12
1.7
ENE
8
2.1
ENE
8
1.6
ENE
8
1.3
ENE
8
1.3
E
8
1.5
E
9
Wave Graph
Metric surfscale
Energy kJ
746
1240
2373
2541
2285
1319
993
918
906
2111
1835
1193
745
520
251
344
616
341
246
239
359
Wind (km/h)
10
SSW
15
SSE
10
WSW
5
S
10
SE
5
N
10
NNE
20
NE
15
N
20
NNE
20
NNE
20
N
20
NNE
25
NNE
25
N
25
N
20
NNE
15
N
25
SSW
10
ESE
10
SW
Wind State
cross-off
cross-on
off
glassy
cross-on
glassy
cross
cross-on
cross
cross
cross-on
cross
cross
cross
cross
cross
cross
cross
cross-off
cross-on
cross-off
High Tide
12:57PM0.68m
11:53PM0.52m
1:15PM0.72m
00:17AM0.60m
1:34PM0.75m
00:41AM0.67m
1:53PM0.77m
1:06AM0.73m
2:12PM0.77m
1:33AM0.78m
2:31PM0.76m
2:02AM0.81m
2:52PM0.74m
2:33AM0.82m
Low Tide
6:39PM0.35m
6:07AM0.11m
7:01PM0.31m
6:46AM0.04m
7:25PM0.28m
7:21AM-0.01m
7:51PM0.26m
7:55AM-0.04m
8:17PM0.25m
8:29AM-0.04m
8:45PM0.24m
9:04AM-0.02m
9:14PM0.24m
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
thunderstorm
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:37
6:37
6:35
6:35
6:33
6:33
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:55
5:55
5:57
5:57
5:58
5:58
5:59
 mm
1
3
Temp °C
15
14
11
14
14
13
17
18
15
20
19
18
23
24
20
25
26
22
23
22
20
Feels °C
12
10
7
12
11
12
14
14
12
17
17
16
20
21
18
23
25
22
24
24
23
  • 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 
submit an eyeball surf report

Quick surf report for Siriu:

join our community of surf reporters

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.


Information about the Siriu Surf forecast

The above surf forecast table for Siriu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Siriu can be found by selecting the local surf guide option on the grey menu. Our Siriu surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Siriu) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Siriu may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Siriu is 27 km (17 miles) from Imbituba. If you plan a holiday in Santa Catarina - Sul, look for hotels and other accommodation in Imbituba. Imbituba has rooms for a wide range of budgets as well as car hire and transport links.

Nearest locationNearest