Siriu Surf Break

Lat Long: 28.00° S 48.63° W

Siriu Surf Forecast and Surf Report

Issued: 2 am 21 Jul 2026 (local time)

Forecast update in  hr  min

Today's Siriu sea temperature is
17.9° C
0.8° 

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


Siriu surf forecast from 21 Jul 2026:

  • Best quality surf: Sunday 26 Jul, 3AM (local time) - 10ft (3.0m), 9s period, S swell with cross-offshore winds.
  • Most powerful swell: Sunday 26 Jul, 3AM (local time) - 10ft (3.0m), 9s period, S swell with 1,372 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 9AM (local time) - 4.5ft (1.3m), 8s period with ENE 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 Tuesday (Jul 21) at 9AM. The primary swell is predicted to be 1.3m and 8s period with a secondary swell of 0.3m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Siriu in the next 16 days are 3.0m 9s and forecast to arrive on Sunday (Jul 26) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Thursday (Jul 23) at 3AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 21st Jul)4.5ft (1.3m) 8s
Best Surf 3AM (Sun 26th Jul)10ft (3.0m) 9s
Most Powerful 3AM (Sun 26th Jul)10ft (3.0m) 9s

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


The Lowdown

Right then, let’s have a look at what’s on the cards for the next couple of weeks. The forecast is for Siriu, a spot that's exposed to the east and best with an easterly swell direction. The water's sitting at 64°, which is about 1° cooler than average for this time of year – nothing to write home about, just a touch on the fresh side.

The good news is we’ve got some action kicking off straight away. Tuesday morning, the 21st of July, is looking like a solid little session. We’ve got a 4ft swell pushing in from the ENE, with a period of 8 seconds. The wind is glassy out of the SSW at just 3 mph, and the wave energy is a moderate 235. It’s a great way to start the period – clean, small, and perfect for a beginner. The afternoon turns a bit cross-on, so the morning is the clear winner here.

Wednesday the 22nd, morning again is the pick. Another glassy start, this time with a light WNW wind, and the swell is a touch smaller at 4ft. Still clean, still fun. The afternoon gets a bit messy with a cross-shore breeze.

Now, Thursday the 23rd is the real standout. The morning brings a solid 7ft swell from the south, with a period of 9 seconds. The wind is a clean cross-off from the SW at 9 mph, and the wave energy is pumping in at a strong 1334. This is excellent, proper surf for experienced surfers. It’s a bit too big for the beginners, but for anyone with a bit of time in the water, this is the one to aim for. The afternoon drops off a little quality-wise, but the morning session is pure gold.

Friday the 24th and Saturday the 25th offer a more moderate, but still fun, run of surf. Friday morning we get a 5ft swell from the SE with glassy conditions, and Saturday morning has a 5ft SE swell with a clean cross-off wind. The weekend’s afternoon sessions are looking good too, with clean conditions on Saturday afternoon and a 5ft swell.

Sunday the 26th is another highlight. The morning is clear, with a 6ft swell from the south, a clean cross-off wind at 12 mph, and a strong wave energy of 728. The afternoon gets a bit too cross-shore and choppy, so get out early.

After that, there’s a real drought. From Monday the 27th, the surf quality drops off a cliff. The wind turns onshore and messy, the swell gets small and weak, and the conditions are poor. This run of bad surf stretches all the way through to the end of the month and into the first days of August. There’s about a week-long gap here with nothing worth paddling out for.

Then, on Monday the 3rd of August, we see a flicker of hope. The morning brings a 2ft swell from the SE, but with a 12-second period, it’s a long-period groundswell. The wind is a clean cross-off from the SW at 12 mph, and the wave energy is moderate at 223. It’s small, but it’s clean. The next morning, Tuesday the 4th, is even better: a 3ft swell from the south, glassy conditions with an ESE wind, and clean surf. Not a huge day, but a welcome return to form.

Overall, the best of the bunch is hands-down Thursday morning the 23rd of July. That 7ft south swell with the clean offshore wind is the pick of the entire forecast. The second shout goes to Sunday morning the 26th, also with a solid south swell and clean conditions. After that, it’s a waiting game for the next pulse in early August.

Rusty.

Short Range Forecast

Moderate rain (total 12mm), heaviest on Wed morning. Warm (max 27°C on Tue afternoon, min 16°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 29mm), heaviest during Sat morning. Very mild (max 19°C on Sat morning, min 13°C on Sun night). Wind will be generally light.

Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
2
2
2
4
2
3
2
1
1
2
3
3
3
1
2
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
ENE
8
1.3
ENE
8
1.3
ENE
8
1.2
ENE
8
1.5
ENE
8
1.2
ENE
8
2.2
S
9
1.9
SSE
9
1.8
SSE
9
1.6
SE
9
1.6
SE
9
1.6
SE
9
1.5
SE
9
1.4
SE
9
1.8
S
13
1.8
S
9
1.6
S
8
1.1
ESE
9
1.2
SE
9
1
ESE
9
0.9
ESE
9
Wave Graph
Metric surfscale
Energy kJ
217
201
217
188
300
190
735
592
547
408
408
354
320
268
1138
541
360
199
231
161
119
Wind (km/h)
5
SW
5
NE
10
N
5
WNW
10
NNE
15
SSW
10
SW
15
S
5
S
5
E
5
NE
10
N
10
NNW
10
SW
20
SW
15
SW
20
S
5
WNW
15
NNE
20
NNE
20
N
Wind State
glassy
cross-on
cross
glassy
cross
cross-off
cross-off
cross
glassy
glassy
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross
glassy
cross
cross-on
cross
High Tide
5:44PM0.52m
11:26PM0.35m
6:39AM0.52m
6:22PM0.49m
12:23PM0.53m
7:29PM0.46m
12:44PM0.60m
10:32PM0.46m
1:06PM0.65m
11:42PM0.51m
1:28PM0.70m
00:20AM0.56m
1:51PM0.73m
00:51AM0.62m
Low Tide
1:28PM0.37m
10:47PM0.35m
10:04AM0.46m
3:00PM0.43m
3:12AM0.30m
4:48PM0.43m
4:31AM0.24m
6:10PM0.40m
5:33AM0.18m
6:55PM0.36m
6:23AM0.12m
7:27PM0.33m
7:04AM0.07m
7:55PM0.31m
cloud
clear
clear
light rain
light rain
rain showers
light rain
rain showers
light rain
light rain
light rain
light rain
heavy rain
light rain
part cloud
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
7:01
7:01
7:00
7:00
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:38
5:38
5:39
5:39
5:40
5:40
5:42
 mm
3
2
2
1
1
3
2
3
3
20
1
Temp °C
24
27
22
19
20
17
17
18
17
17
17
17
19
18
18
18
18
14
20
20
15
Feels °C
25
28
22
21
21
15
16
16
17
17
17
18
18
16
14
14
15
13
17
16
11
  • 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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