Rosa Surf Break

Lat Long: 28.13° S 48.64° W

Rosa Surf Forecast and Surf Report

Issued: 8 am 13 Aug 2026 (local time)

Forecast update in  hr  min

Today's Rosa sea temperature is
18.7° C
0.3° 

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


Rosa surf forecast from 13 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 3PM (local time) - 6ft (1.9m), 13s period, S swell with cross-offshore winds.
  • Most powerful swell: Thursday 13 Aug, 6PM (local time) - 7ft (2.1m), 13s period, S swell with 1,514 kJ wave energy.
  • Next surfable swell (1★+): Thursday 13 Aug, 3PM (local time) - 6ft (1.9m), 13s period with S swell.

Best Forecast Surf Conditions for Rosa this week:

The surf forecast for Rosa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 3PM. The primary swell is predicted to be 1.9m and 13s period with a secondary swell of 0.4m and 5s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Rosa in the next 16 days are 2.1m 13s and forecast to arrive on Thursday (Aug 13) at 6PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Tuesday (Aug 18) at 9PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Thu 13th Aug)6ft (1.9m) 13s
Best Surf 3PM (Thu 13th Aug)6ft (1.9m) 13s
Most Powerful 6PM (Thu 13th Aug)7ft (2.1m) 13s

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


The Lowdown

Second text (Imperial)

Alright, let’s talk Rosa in numbers you can feel in your bones.

We kick off Thursday morning with a solid 7ft south swell, a long 14-second period pushing the energy to 1587. That’s some serious grunt. Water temp is sitting about average for this time of year at 66°F. The wind is a light cross-offshore, keeping it clean. This is for experienced surfers only – the size and power mean business. The wave quality is excellent.

That keeps rolling into Thursday afternoon, still a strong 6ft south swell with a 13-second period, energy at 1313. Still clean, still quality.

Friday morning the swell holds at 6ft from the SSE, period 13 seconds, energy 1460, but the wind turns onshore. It’s light, so it’s not blown out, but it’s not as good. The quality drops.

Friday afternoon bumps up a bit to 7ft from the SSE, but the onshore wind strengthens and things get messy. Saturday sees a drop in size, the wind goes cross, and the period shortens. Surf turns marginal. Sunday the wind howls and conditions get poor. That poor spell runs through Monday into Tuesday morning, though Tuesday morning does give us a glassy, clean 5ft east-northeast swell – a small, clean window.

Then it’s back to marginal or poor through Wednesday and Thursday. Thursday afternoon (20th) goes glassy again but with a tiny 5ft easterly swell and a short period.

Now listen up. Friday the 21st of August is a standout. The morning brings a clean 7ft south swell. The wind is a light cross-offshore, making for very good surf. This is the pick of the first week.

But the real highlight is Monday the 24th of August. The morning cranks with a 6ft south swell, 12-second period, energy at 1127, and a light cross-offshore breeze. Excellent conditions for the experienced. Then Tuesday the 25th afternoon – a solid 8ft south swell with a 12-second period and energy roaring at 3673. That’s a ton of power. The wind is a light cross-onshore, so it’s a bit bumpy, but the size is massive for those who want a real test.

So, a decent start for the big-wave crew, then a quiet patch, followed by a real promising run of south swells in the second week, especially around the 21st and then the 24th and 25th. Rosa is pretty consistent, so it won't stay quiet for long.

Rusty.

Short Range Forecast

Heavy rain (total 64mm), heaviest during Fri night. Very mild (max 18°C on Fri night, min 17°C on Thu morning). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 3mm), mostly falling on Sun morning. Warm (max 24°C on Mon morning, min 16°C on Tue night). Wind will be generally light.

Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
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
4
3
2
2
1
2
1
1
0
0
1
0
0
1
1
1
1
2
2
1
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
14
1.9
S
13
1.5
S
13
1.8
SSE
13
2.1
SSE
13
1.6
S
12
1.3
S
12
2.1
ENE
8
1.9
ENE
8
2
ENE
8
2.1
ENE
8
2.2
ENE
8
2.1
ENE
8
2.2
ENE
8
1.9
ENE
9
1.6
ENE
9
1.5
ENE
9
1.3
ENE
9
1.1
ENE
9
1.4
S
8
1.1
S
8
Wave Graph
Metric surfscale
Energy kJ
1576
1303
713
1127
1430
773
456
481
406
511
592
650
638
715
588
405
343
274
212
239
161
Wind (km/h)
10
SW
15
SSW
10
SE
10
E
15
ENE
20
ENE
10
NNE
20
NNE
20
NNE
20
NNE
15
NE
25
NNE
25
NNE
25
NE
20
NNE
10
N
25
SSW
20
SW
15
SSW
5
ENE
10
NNE
Wind State
cross-off
cross-off
cross-on
on
on
on
cross
cross-on
cross
cross-on
cross-on
cross
cross
cross-on
cross
cross
cross-off
cross-off
cross-off
glassy
cross
High Tide
3:20PM0.59m
1:37AM0.66m
2:58PM0.55m
2:13AM0.70m
3:07PM0.54m
2:51AM0.70m
3:26PM0.54m
3:30AM0.67m
3:49PM0.55m
4:12AM0.62m
4:15PM0.54m
4:57AM0.55m
12:02PM0.42m
Low Tide
9:26PM0.35m
9:35AM-0.04m
9:48PM0.34m
10:10AM0.04m
10:06PM0.32m
10:44AM0.13m
7:53PM0.28m
11:16AM0.24m
8:20PM0.22m
8:42AM0.31m
8:52PM0.20m
8:49AM0.34m
1:09PM0.41m
9:25PM0.21m
light rain
rain showers
mod rain
light rain
mod rain
heavy rain
light rain
light rain
light rain
light rain
cloud
part cloud
clear
clear
clear
clear
clear
cloud
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:48
6:47
6:46
6:45
6:43
6:43
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:51
5:52
5:52
5:52
5:52
5:53
 mm
2
9
10
4
9
21
5
2
2
3
Temp °C
17
17
17
17
17
18
18
18
18
19
19
19
24
24
19
23
22
17
17
18
16
Feels °C
18
17
18
17
16
18
19
17
17
18
18
17
22
22
19
25
20
15
18
18
16
  • 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 Rosa Surf forecast

The above surf forecast table for Rosa provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rosa can be found by selecting the local surf guide option on the grey menu. Our Rosa 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 (Rosa) 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 Rosa 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.

Rosa is 12 km (7 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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