Siriu Surf Break

Lat Long: 28.00° S 48.63° W

Siriu Surf Forecast and Surf Report

Issued: 2 pm 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Siriu sea temperature is
15.3° C
3.6° 

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


Siriu surf forecast from 12 Jul 2026:

  • Best quality surf: Monday 13 Jul, 6AM (local time) - 7.5ft (2.3m), 8s period, S swell with cross-offshore winds.
  • Most powerful swell: Monday 13 Jul, 3AM (local time) - 8ft (2.4m), 8s period, S swell with 765 kJ wave energy.
  • Next surfable swell (1★+): Monday 13 Jul, 6AM (local time) - 7.5ft (2.3m), 8s 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 Monday (Jul 13) at 6AM. The primary swell is predicted to be 2.3m and 8s period with a secondary swell of 1.9m and 8s. Another secondary swell of 0.7m and 12s is also forecast. 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 2.4m 8s and forecast to arrive on Monday (Jul 13) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Mon 13th Jul)7.5ft (2.3m) 8s
Best Surf 6AM (Mon 13th Jul)7.5ft (2.3m) 8s
Most Powerful 3AM (Mon 13th Jul)8ft (2.4m) 8s

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


Alright, Rusty here, switching to boots and inches.

The water is a frigid 60°, which is about 7° colder than usual for this time of year. You’re gonna need a thick suit.

The next couple of days are a bust. Sunday afternoon has 30 km/h cross-shore wind and a messy, lumpy sea. Monday the 13th morning shows a 7ft S swell, but it’s a short-period 8-second wind swell, with moderate energy (1159). It’s clean with cross-offshore wind, but that’s for experienced surfers only.

The best bet of the first week is Tuesday morning, the 14th. The wind drops to glassy, and you get a 6ft SE swell with a 10-second period. The energy is moderate (545), but the glassy conditions will make the waves clean and lined up. That’s the session to aim for.

From Wednesday the 15th through the 24th, it’s mostly poor. Winds are cross or cross-onshore, the swell is small, and the surf is weak. There’s a tiny window on Tuesday the 21st afternoon with glassy wind and a 3ft ENE swell, but the energy is weak (226) and the waves are small.

Now for the second week. Friday the 25th morning brings a solid 8ft S swell (10 seconds) with strong energy (1810) and clean cross-offshore wind. That’s a powerful wave for experts only. The 26th is even bigger: 8ft SSE swell with a long 14-15 second period, and energy readings are huge (2799–3234). The wind is clean and offshore.

Then Monday the 27th morning, it’s a massive 10ft SSE swell with a very long 16-second period, and the energy is overwhelming (3955). The wind is glassy. But that’s too big for this spot. It’s a chargers-only zone, and even then, it’s a maybe.

If you’re looking for the best wave, paddle out on Tuesday the 14th morning for glassy 6ft SE groundswell. For the second week, circle the 25th and 26th for powerful, clean S to SSE swells, but be aware the 26th is big. Crowds are only sometimes a problem, so you might score some empty waves.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Wed morning, min 11°C on Sun night). Winds decreasing (fresh winds from the S on Sun afternoon, calm by Tue morning).

Days 5-7 Weather Summary

Mostly dry. Warm (max 25°C on Sat morning, min 14°C on Wed night). Mainly fresh winds.

Sun
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
0
3
4
1
3
3
1
2
1
0
0
0
0
0
1
0
1
1
0
2
1
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
ESE
12
2.4
S
8
2.1
S
8
1.6
S
8
1.5
SSE
10
1.7
SE
10
1.7
SE
10
1.6
ESE
10
1.7
ESE
10
1.3
ESE
10
1.2
ESE
11
1
ESE
11
1
ESE
11
0.9
ESE
11
1.9
NE
8
1.6
ENE
8
2
NE
8
2.1
NE
8
1.6
ENE
8
2.1
NE
8
1.4
ENE
8
Wave Graph
Metric surfscale
Energy kJ
309
674
612
310
394
542
546
500
540
360
334
247
226
211
447
326
519
560
323
560
277
Wind (km/h)
25
S
15
SW
10
SW
15
S
10
WSW
5
NW
15
NE
15
N
20
N
20
NNE
20
N
20
N
25
NNE
20
N
20
NNE
20
NNE
20
N
15
NNE
20
NNE
15
N
15
N
Wind State
cross
cross-off
cross-off
cross
off
glassy
cross-on
cross
cross
cross
cross
cross
cross-on
cross
cross
cross-on
cross
cross
cross-on
cross
cross
High Tide
00:49AM0.50m
3:00PM0.82m
1:07AM0.55m
3:36PM0.78m
1:33AM0.61m
3:55PM0.72m
2:04AM0.67m
4:01PM0.65m
2:38AM0.72m
4:11PM0.60m
3:15AM0.73m
4:27PM0.56m
9:16PM0.43m
3:55AM0.71m
Low Tide
8:25PM0.29m
7:48AM0.00m
9:05PM0.33m
8:33AM-0.04m
9:39PM0.39m
9:15AM-0.05m
10:07PM0.43m
9:56AM-0.02m
10:30PM0.46m
10:35AM0.03m
10:48PM0.45m
11:12AM0.11m
8:49PM0.43m
11:48AM0.20m
part cloud
part cloud
part cloud
part cloud
clear
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:05
7:03
7:03
7:03
7:03
7:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:34
5:35
5:35
5:36
5:36
5:37
5:37
5:37
 mm
Temp °C
17
15
15
16
13
17
18
15
19
19
15
20
21
17
23
24
19
25
25
21
28
Feels °C
12
11
11
12
11
16
16
13
15
15
12
16
17
13
20
21
17
22
22
19
25
  • Map Icons:
  • Break
  • 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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