Siriu Surf Break

Lat Long: 28.00° S 48.63° W

Issued: 2 am 04 Jul 2026 (local time)

Forecast update in  hr  min

Today's Siriu sea temperature is
16.3° C

2.8°C colder than average for this time of year

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


Siriu surf forecast from 4 Jul 2026:

  • Best quality surf: Saturday 4 Jul, 9AM (local time) - 6.5ft (2.0m), 12s period, S swell with cross-offshore winds.
  • Most powerful swell: Saturday 4 Jul, 12PM (local time) - 7.5ft (2.3m), 12s period, SSE swell with 1,413 kJ wave energy.
  • Next surfable swell (1★+): Saturday 4 Jul, 9AM (local time) - 6.5ft (2.0m), 12s 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 Saturday (Jul 04) at 9AM. The primary swell is predicted to be 2.0m and 12s period with a secondary swell of 0.4m and 10s. 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 2.3m 12s and forecast to arrive on Saturday (Jul 04) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 10s period and expected on Saturday (Jul 04) at 9AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Sat 4th Jul)6.5ft (2.0m) 12s
Best Surf 9AM (Sat 4th Jul)6.5ft (2.0m) 12s
Most Powerful12PM (Sat 4th Jul)7.5ft (2.3m) 12s

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


Updates in  hr  min  s Forecast update imminent

Alright, this is Rusty, and I’m looking at the surf for the next couple of weeks. It’s a bit of a slow start, but there’s some real potential brewing if you’re willing to wait for it.

The first real action that’s worth paddling out for kicks off on Saturday morning, July 4th. We’ve got a solid 6.6ft swell rolling in from the S at Siriu, with a period of 12 seconds. That’s a nice, long groundswell, which means it’s got some real punch and shape. The combined energy of all swells is a strong 1186. The wind is a light cross-off from the SW at 6 mph, and the water is feeling much colder than normal for this time of year, sitting at 61.3°.

This is a beginner-friendly break, but with a 6.6ft swell, it’s getting a bit too big for total beginners. The way the wind is setting up, it’s going to be clean and lined up. That’s a great window for a more experienced surfer who wants some open faces. The wind stays manageable through the afternoon, too, but it goes cross, so the morning is the real call.

Sunday morning, the 5th, is a glassy dream. The swell drops a touch to 6.2ft still from the SSE, but with a NW wind of just 3 mph, it’s going to be a mirror. It’s a short window, but if you can get out there early, you’ll be rewarded with some of the cleanest lines of the week.

After that, things get a bit messy and smaller for a stretch. The middle of the week (Monday through to the following weekend) is a bit of a write-off, with the swell dropping under 3.3ft and wind messing it up. You’ll be looking at a few days of small, ordinary conditions.

The next real standout shows up on the morning of Tuesday, July 14th. That’s a week and a half out, so keep an eye on it. We’re looking at a 5.2ft S swell with a 12-second period, and the wind is a light cross-off from the SSW at 6 mph. The combined energy is a solid 719, and it’s going to be clean. That’s a proper return to form for a morning session.

The real highlight, though, is the end of the run. The morning of Sunday, July 19th, is looking like a beast. The forecast has a 8.2ft NE swell, but with a short period of 8 seconds. The wind is dead calm, glassy, zero. The combined energy is a massive 1363. This is a big, powerful, and clean swell. At 8.2ft, this is for experts only. It’s a bit of a short period, so it might be a bit punchy and close out on a beach break, but if the banks are right, there will be some heavy, clean barrels. That’s the one to circle on the calendar if you’ve got the skills.

So, to sum it up: the best of the best is that glassy Sunday morning on the 19th for the big, powerful swell, with the Saturday morning on the 4th and the Tuesday morning on the 14th as your next best windows for clean, solid surf.

Stay stoked, and I’ll see you in the water.

Short Range Forecast

Moderate rain (total 17mm), heaviest on Mon night. Very mild (max 18°C on Mon morning, min 11°C on Sat morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Thu morning, min 11°C on Tue night). Wind will be generally light.

Saturday
4
Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
3
4
3
1
2
2
2
2
3
1
2
2
1
2
0
0
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
S
12
2.3
SSE
12
2.1
SSE
11
1.9
SSE
11
1.7
SSE
11
1.4
SSE
10
1.3
SSE
10
1.1
SE
10
1.1
SE
10
1.8
S
7
1.2
S
8
1.1
S
8
1
S
8
0.9
S
9
0.8
S
10
0.7
ESE
10
0.7
ESE
10
0.6
ESE
10
0.8
ESE
11
0.8
ESE
10
0.9
ESE
11
Wave Graph
Metric surfscale
Energy kJ
1155
1348
1034
839
643
410
296
245
217
330
160
141
135
140
133
102
100
80
128
118
176
Wind (km/h)
10
SW
10
SSE
5
W
5
NNW
15
ENE
15
N
15
N
5
NNW
10
SSW
15
SSW
10
SE
5
NW
10
NNW
10
NE
10
NNW
15
N
10
SSE
5
W
10
SSW
5
SSE
20
SW
Wind State
cross-off
cross
off
glassy
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-on
cross-off
cross-off
cross-on
cross-off
cross
cross-on
glassy
cross-off
glassy
cross-off
High Tide
4:57PM0.66m
4:26AM0.69m
5:40PM0.62m
5:14AM0.65m
6:31PM0.58m
6:13AM0.60m
7:37PM0.53m
7:40AM0.56m
11:17PM0.50m
11:31AM0.60m
00:03AM0.49m
12:39PM0.69m
00:30AM0.48m
Low Tide
11:15AM0.08m
11:49PM0.37m
12:08PM0.12m
00:48AM0.37m
1:10PM0.17m
1:53AM0.37m
2:23PM0.22m
3:03AM0.34m
3:46PM0.25m
4:12AM0.29m
5:13PM0.26m
5:15AM0.22m
6:32PM0.26m
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
light rain
heavy rain
part cloud
clear
clear
clear
clear
clear
clear
clear
part cloud
mod rain
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:05
7:05
7:05
7:05
7:05
7:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:30
5:30
5:31
5:31
5:32
5:32
5:32
 mm
2
15
6
1
3
Temp °C
14
15
12
16
16
14
18
17
15
14
15
12
16
17
14
19
18
14
14
14
14
Feels °C
11
12
10
14
13
12
16
17
13
11
12
11
13
15
12
18
16
13
13
14
10
Swell 1
Height (m)
Direction
Period (s)
2
S
12
2.3
SSE
12
2.1
SSE
11
1.9
SSE
11
1.7
SSE
11
1.4
SSE
10
1.3
SSE
10
1.1
SE
10
1.1
SE
10
1.3
S
7
1.2
S
8
1.1
S
8
1
S
8
0.9
S
9
0.8
S
10
0.7
ESE
10
0.7
ESE
10
0.6
ESE
10
0.8
ESE
11
0.8
ESE
10
0.9
ESE
11
Energy kJ
1155
1348
1034
839
643
410
296
245
217
168
160
141
135
140
133
102
100
80
128
118
176
Swell 2
Height (m)
Direction
Period (s)
0.4
ENE
10
0.4
ENE
9
0.4
ENE
10
0.4
ENE
10
0.4
ENE
10
0.4
ENE
9
0.6
SSE
18
0.5
SSE
16
0.4
SSE
15
0.9
SE
10
0.9
SE
10
0.8
ESE
10
0.8
ESE
9
0.8
ESE
9
0.7
ESE
10
0.6
S
9
0.5
S
9
0.3
S
8
0.5
NE
5
0.4
NE
5
0.4
NE
5
Energy kJ
31
29
32
32
31
35
207
147
72
134
139
120
98
100
104
61
39
11
12
9
6
Swell 3
Height (m)
Direction
Period (s)
0.1
SE
23
0.4
SSE
20
0.4
ENE
9
0.3
ENE
9
0.3
ENE
8
0.4
ESE
11
0.3
SSE
13
0.2
E
8
0.2
E
8
0.3
SSE
14
0.1
S
15
0.1
S
14
0.4
NE
5
0.3
S
7
0.2
SSW
7
0.2
S
6
Energy kJ
21
152
28
16
14
51
33
5
5
37
4
4
7
9
5
3
Wind waves
Height (m)
Direction
Period (s)
2.1
S
10
0.5
N
3
0.4
NNE
3
0.4
NNE
4
0.7
S
5
1.8
S
7
0.3
N
2
0.3
N
3
0.3
NNE
4
0.8
NNE
4
0.6
NNE
5
0.8
NNE
5
Energy kJ
861
4
4
6
25
330
1
1
2
26
17
27
Nearest Offshore or Glassy
Rating
(10 max)
4
4
4
3
2
3
2
2
2
3
2
2
2
1
2
1
1
1
1
1
1
Distance (km)
0
10
0
0
27
9
18
0
0
0
13
0
0
26
0
9
10
0
0
0
13
Best forecast wave conditions in Santa Catarina - Sul
Rating
(10 max)
4
4
4
4
3
3
3
2
2
3
3
2
2
2
2
2
1
2
1
1
1
Best forecast wave conditions in Brazil
Rating
(10 max)
4
4
4
4
4
3
4
3
4
3
3
3
2
2
2
1
2
2
1
1
1
Header Global
Rating
(10 max)
5
5
5
9
6
5
6
8
7
5
5
9
8
9
9
5
7
5
4
8
4
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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