Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 am 10 Aug 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
20.0° C
1.7° 

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


Prainha surf forecast from 10 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 9AM (local time) - 2.5ft (0.8m), 13s period, SE swell with offshore winds.
  • Most powerful swell: Tuesday 11 Aug, 9AM (local time) - 2.5ft (0.8m), 13s period, SE swell with 239 kJ wave energy.
  • Next surfable swell (1★+): Monday 10 Aug, 3PM (local time) - 1.5ft (0.4m), 13s period with SE swell.

Best Forecast Surf Conditions for Prainha this week:

The surf forecast for Prainha over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 10) at 3PM. The primary swell is predicted to be 0.4m and 13s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.9m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 0.8m 13s and forecast to arrive on Tuesday (Aug 11) at 9AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Thursday (Aug 13) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Mon 10th Aug)1.5ft (0.4m) 13s
Best Surf 9AM (Tue 11th Aug)2.5ft (0.8m) 13s
Most Powerful 9AM (Tue 11th Aug)2.5ft (0.8m) 13s

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


The Lowdown

Right then, let’s have a look at what’s on offer for Prainha over the next couple of weeks. To be honest, it’s a bit of a mixed bag, with a fair few days of pretty ordinary conditions before we get a couple of windows that are worth getting excited about. Keep in mind this is an advanced spot, so when it does turn on, it’s for the crew who know what they’re doing.

The combined swell energy sits mostly in that moderate range – think values like 134 to 244 – but the consistency of the swell itself is very consistent, which is a bonus. Water temp is sitting at 68°, feeling a touch warmer than usual for this time of year, about 3° above normal, so a little extra warmth in the water.

Alright, the first real standout kicks off on Tuesday 11th August. The morning session is the pick. We’ve got a clean 3 ft wave from the southeast with a solid 13-second period. That’s proper groundswell energy, and with a light offshore breeze from the west-southwest, the lines will be clean. The afternoon stays clean too with a 2 ft swell and offshore wind, but the morning has the best energy. The combined swell energy is 244, which is a solid moderate push. This is the best bet in the first week.

The next one to keep an eye on is Sunday 16th August. The morning is looking good again – glassy conditions, calm wind, and a 3 ft swell from the east-southeast. The period is shorter though, only 8 seconds, so it’s a windswell, not the long stuff. The combined energy is 204, so there’s some push, but the short period means it might be a bit lumpy and won’t have that long, drawn-out line you’d get from a groundswell. Still, glassy and 3 ft is fun.

After that, there’s a bit of a flat spell with poor conditions through the middle of the week, but Friday 21st August morning offers another chance. Glassy again, with a 3 ft east swell but only 7-second period. The combined energy is 108 – weak to moderate. It’s surfable, but nothing special.

If you’re looking further out, Monday 24th August morning has a clean 3 ft swell from the south-southeast with a 7-second period, light offshore wind from the southwest. Combined energy is 122, so it’s okay, but again, short period windswell. The glassy morning on Tuesday 25th August is a small one, 1 ft from the southeast but with a long 14-second period giving 173 combined energy – that’s a proper groundswell pulse, but tiny. For advanced surfers at Prainha, that might be a bit of a tease, but it’s clean.

The one standout that has the most going for it is Tuesday 11th August morning. That’s when you’ve got decent size (3 ft), good direction (SE), long period (13s), and offshore wind. That’s the session to point your board towards.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Mon morning. Very mild (max 17°C on Wed afternoon, min 13°C on Mon morning). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 15mm), heaviest on Sat night. Warm (max 20°C on Sat morning, min 15°C on Thu morning). Wind will be generally light.

Monday
10
Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
2
1
1
1
0
0
1
0
1
1
1
1
0
0
0
2
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SE
13
0.4
SE
13
0.6
SE
13
0.8
SE
13
0.7
SE
13
0.7
SE
12
0.7
SE
12
0.6
SE
12
0.6
SE
12
0.6
SE
16
0.6
SE
15
0.6
SE
13
0.4
SE
14
0.6
SE
14
0.6
SE
13
0.4
SE
12
0.5
SE
8
0.6
SSE
11
0.9
ESE
8
0.9
ESE
8
0.9
ESE
8
Wave Graph
Metric surfscale
Energy kJ
106
56
108
239
156
148
146
118
98
153
174
113
64
127
108
52
35
91
99
96
96
Wind (km/h)
20
S
15
S
15
SSE
10
WSW
10
SW
5
WSW
5
WNW
15
NE
5
NNW
5
SW
20
SE
0
ESE
5
SW
5
S
10
NNW
15
N
10
NNE
10
N
0
W
15
SE
0
S
Wind State
cross-off
cross-off
cross
off
off
glassy
cross-off
cross-on
cross
cross-off
cross
glassy
glassy
cross-off
cross-off
cross
cross-on
cross-on
glassy
cross
glassy
High Tide
1:50PM1.33m
1:38AM1.12m
2:31PM1.37m
2:16AM1.22m
3:08PM1.36m
2:52AM1.29m
3:42PM1.32m
3:27AM1.33m
4:14PM1.26m
4:02AM1.33m
4:44PM1.18m
4:38AM1.28m
5:12PM1.10m
Low Tide
8:56PM0.43m
8:20AM0.06m
9:12PM0.47m
8:37AM0.01m
8:59PM0.49m
8:52AM-0.00m
8:49PM0.45m
9:11AM0.02m
9:04PM0.38m
9:33AM0.07m
9:28PM0.32m
9:59AM0.15m
9:59PM0.28m
light rain
cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
cloud
cloud
mod rain
light rain
light rain
rain showers
cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:47
6:46
6:45
6:43
6:43
6:43
6:41
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:52
5:52
5:52
5:52
5:53
5:53
 mm
1
1
1
6
1
1
5
Temp °C
14
14
15
14
14
14
14
17
17
18
18
18
18
19
19
20
20
20
20
19
19
Feels °C
10
10
11
12
12
12
13
16
17
17
16
20
19
21
21
21
22
21
19
19
22
  • 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 Prainha Surf forecast

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

Prainha is 14 km (9 miles) from Sao Francisco do Sul. If you plan a holiday in Santa Catarina - Norte, look for hotels and other accommodation in Sao Francisco do Sul. Sao Francisco do Sul has rooms for a wide range of budgets as well as car hire and transport links.

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