Siriu surfForecast / Santa Catarina – Sul / Brazil

information circle12 Day Weather and Surf, issued 2 am Tuesday 08 Jul 2025 -03
Forecast update in hr  min  s Forecast update imminent
Siriu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Siriu sea temperature is
16.7° C
(Which is 2.2°C colder than average for this time of year)


Best Forecast Surf Conditions for Siriu this week:

The surf forecast for Siriu over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 08) at 6AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.5m and 7s. Another secondary swell of 0.5m and 4s 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 12 days are 2.1m 7s and forecast to arrive on Monday (Jul 14) 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 1.1m 6s period and expected on Wednesday (Jul 09) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 8th Jul)2ft (0.6m) 8s
Best Surf 6PM (Sun 13th Jul)6ft (1.8m) 7s
Most Powerful 3AM (Mon 14th Jul)7ft (2.1m) 7s

Table - best surf conditions forecast for Siriu over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.6
S
0.4
SSE
0.6
SSE
0.5
S
0.5
S
0.7
E
0.7
E
0.7
E
0.7
E
0.7
E
0.6
E
0.5
SSE
0.6
S
0.5
S
0.4
S
0.6
E
1.5
ESE
2
E
1.6
E
1.6
E
1.5
E
1.5
E
1.2
E
1.3
E
0.8
ESE
1.1
E
1.1
E
1
E
0.9
ESE
0.9
E
0.9
E
0.9
E
0.9
ENE
0.9
ENE
1
ENE
1
E
Period(s) (?)8131110978888812111010777777777888777777777
Wave
Graph
(?)Metric surfscale
Energy (?)801251841201099577789692971391328660622116843042923922362183001861601441129910385838079167141
Wind
(km/h)
5
SW
15
SSE
15
SW
15
SW
10
SE
10
WNW
5
NNW
20
NE
15
N
10
N
15
NE
10
SW
10
SSW
20
S
10
SW
10
SW
15
S
10
W
5
WSW
15
NE
15
N
10
N
20
NE
15
N
15
N
25
NNE
15
NNE
15
N
20
NNE
15
N
5
NNW
10
SE
5
SW
5
NNE
15
ENE
15
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscrosscross-
off
cross-
off
cross-
on
offglasscross-
on
cross-
off
cross-
off
cross-
on
cross-
off
cross-
off
crosscross-
off
cross-
off
crossoffglasscross-
on
crosscrosscross-
on
crosscrosscross-
on
crosscrosscross-
on
crossglasscross-
on
glassglasscross-
on
cross
High Tide
/ height (m)
1:31PM
0.72
12:38AM
0.57
2:04PM
0.75
1:11AM
0.61
2:35PM
0.76
1:43AM
0.65
3:07PM
0.76
2:15AM
0.69
3:39PM
0.74
2:49AM
0.71
4:12PM
0.71
3:25AM
0.72
4:47PM
0.67
4:03AM
0.70
5:23PM
0.61
4:46AM
0.67
6:00PM
0.55
5:36AM
0.62
6:40PM 11:06PM
0.49 0.46
6:46AM
0.56
7:29PM 11:55PM
0.43 0.45
12:04PM
0.58
12:26AM
0.43
Low Tide
/ height (m)
7:46PM
0.30
7:25AM
0.06
8:24PM
0.30
8:07AM
0.02
9:00PM
0.30
8:49AM
-0.00
9:36PM
0.32
9:32AM
-0.01
10:14PM
0.34
10:16AM
-0.00
10:54PM
0.37
11:02AM
0.03
11:39PM
0.39
11:53AM
0.09
12:29AM
0.40
12:53PM
0.16
1:28AM
0.40
2:05PM
0.24
9:14PM 2:35AM
0.45 0.38
3:31PM
0.30
9:24PM
0.42
3:45AM
0.32
5:08PM
0.33
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunrise7:05--7:05--7:05--7:05--7:05--7:05--7:05--7:03--7:03--7:03--7:03--7:03--
Sunset-5:32--5:32--5:32--5:34--5:34--5:35--5:35--5:36--5:36--5:37--5:37--5:37-
clearclearpart cloudclearclearclearclearclearclearclearclearclearclearclearclearclearclearpart cloudclearclearclearclearrain showerspart cloudclearclearclearclearclearpart cloudpart cloudclearclearclearclearclear
Rain (mm)
----------------------1-------------
Temp. °C181815181814191916212318191915191917202017222317222319232319202017202017
Feels °C (?)161613171614171614192118161614181818201916202116202118212118212017201917

Short Range Forecast: Mostly dry. Very mild (max 19°C on Thu morning, min 14°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 23°C on Fri afternoon, min 15°C on Fri night). Wind will be generally light.

Days 6-9 Weather Summary Some drizzle, heaviest during Tue afternoon. Warm (max 23°C on Tue afternoon, min 17°C on Mon morning). Wind will be generally light.

Long Range Forecast: Mostly dry. Warm (max 23°C on Thu morning, min 15°C on Fri night). Wind will be generally light.

  • 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 12 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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