Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 am 12 Jul 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
17.7° C
0.9° 

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


Prainha surf forecast from 12 Jul 2026:

  • Best quality surf: Monday 13 Jul, 12AM (local time) - 6ft (1.9m), 8s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Sunday 12 Jul, 9PM (local time) - 6.5ft (2.0m), 8s period, SSE swell with 515 kJ wave energy.
  • Next surfable swell (1★+): Monday 13 Jul, 12AM (local time) - 6ft (1.9m), 8s period with SSE 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 (Jul 13) at 12AM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 1.1m and 8s. Another secondary swell of 0.6m and 12s 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 2.0m 8s and forecast to arrive on Sunday (Jul 12) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Saturday (Jul 18) at 9PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 13th Jul)6ft (1.9m) 8s
Best Surf12AM (Mon 13th Jul)6ft (1.9m) 8s
Most Powerful 9PM (Sun 12th Jul)6.5ft (2.0m) 8s

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


Alright, this is Rusty. Let’s get into it.

Alright, over this 16-day run, we’ve got one spot that’s really the only game in town: Prainha. It's an advanced-level break, very consistent, and it’s going to dish out a mix of clean windows and some ordinary spells. The standouts here are Sunday morning the 12th, and then a few glassy mornings mid-week that are worth setting the alarm for.

Water temp is sitting right about 64°F, which is running about 2°F cooler than average for the time of year. Nothing wild, just a touch on the fresh side.

Let's start with Sunday the 12th – morning session is your best bet. We’ve got clean, cross-off wind from the southwest at 6 mph, with chest-high swell from the ESE at about 3 ft, period of 12 seconds. That longer period means there’s some groundswell energy in the water, good shape, and it’s packing moderate punch (combined energy of 208). Conditions are clean and the surf is good. The afternoon takes a turn though – wind swings southerly and ramps up to 15 mph, making a mess of it.

Monday the 13th morning is surfable but ordinary. Swell drops a touch to 3 ft from the SE, period drops to 9 seconds, so it’s a bit weaker (energy 187) and less organized. Wind is cross-off but a moderate breeze at 9 mph. It’s doable, but nothing special.

Tuesday the 14th morning is similar: 3 ft from the SE at 10 seconds, light cross-off wind, energy at 197. It’s clean enough but just ordinary. Afternoon gets a light cross-onshore and the vibe fades.

Now, the real windows pop up Wednesday the 15th and Thursday the 16th mornings. Wednesday morning is glassy – dead calm wind from the WNW at only 3 mph – with head-high 4 ft swell from the ESE at 10 seconds. Energy is solid at 252. That’s a sweet, clean window with good shape. Thursday morning repeats the trick: glassy, 3 ft from the ESE, 10-second period, energy at 231. Both mornings are excellent for an advanced surfer on a consistent, exposed spot like Prainha.

Friday the 17th morning is another glassy beauty, but smaller at 2 ft, 12-second period from the ESE, energy still decent at 218. Clean, but you’ll be hunting for the better sets.

After that, from Saturday the 18th onward, the swell drops off noticeably. There’s a long patch of small, weak waves. You’ll get glassy mornings on the 18th, 19th, and 20th, but the swell is mostly below knee-high with short periods (8 seconds) and very low energy (the 20th morning energy is only 115, and the afternoon just 2 – a dead flat calm). Winds are glassy or light, so it’s picturesque but barely surfable.

The last week is a real bust. From the 21st to the 27th, the swell barely gets above 2 ft, with energy mostly under 100. There’s a brief pulse of longer-period groundswell on the 23rd (1 ft, 13 seconds from SE), but at that size, combined energy is just 65 – it’s not doing anything for a surfer. Winds are mixed, sometimes offshore or glassy, but the lack of size kills it.

To sum it up: the first five days are where it’s at. Wednesday the 15th and Thursday the 16th mornings are the true standouts – glassy, head-high groundswell, clean conditions, and solid energy. Get on it. After that, you’re looking at flat spells and skimpy little waves for over a week. Not much to write home about after that first week.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Sun morning, min 12°C on Mon morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 20°C on Fri night, min 14°C on Wed night). Wind will be generally light.

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
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
0
3
1
0
3
1
1
2
2
1
2
2
0
0
2
0
1
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)
0.8
ESE
12
0.9
SE
12
1.9
SSE
8
0.8
SE
9
0.5
SE
11
1.7
SSE
8
1
SE
10
1
SE
10
1.1
SE
10
1.1
ESE
10
1.1
ESE
10
1
ESE
10
1
ESE
10
1
E
11
0.7
ESE
11
0.7
ESE
12
0.9
E
8
0.5
ESE
12
0.9
E
8
0.4
SE
11
0.3
ESE
10
Wave Graph
Metric surfscale
Energy kJ
193
252
429
97
61
412
196
204
229
250
227
218
231
233
103
123
105
82
93
31
22
Wind (km/h)
10
SW
25
S
10
S
15
SW
10
SE
10
SSW
10
SW
10
SE
10
NW
5
WNW
10
ENE
10
NW
5
WNW
10
NE
10
N
5
W
15
NE
5
NNW
5
NNW
15
NE
5
NNW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
cross-off
cross-on
cross-off
glassy
on
cross-off
glassy
on
cross-on
glassy
cross-on
glassy
glassy
on
cross
High Tide
1:57PM1.34m
1:54AM1.05m
2:45PM1.37m
2:34AM1.10m
3:30PM1.36m
3:13AM1.15m
4:11PM1.31m
3:50AM1.19m
4:49PM1.23m
4:28AM1.21m
5:26PM1.15m
5:07AM1.19m
6:03PM1.07m
Low Tide
9:11PM0.43m
8:08AM0.14m
9:42PM0.49m
8:31AM0.08m
9:39PM0.56m
8:57AM0.04m
9:10PM0.57m
9:25AM0.05m
9:24PM0.54m
9:56AM0.09m
9:50PM0.50m
10:28AM0.16m
10:24PM0.46m
clear
part cloud
clear
clear
clear
part cloud
clear
clear
clear
cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
7:01
7:00
7:00
7:00
6:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:37
5:37
5:37
5:38
5:38
5:39
5:39
 mm
Temp °C
21
21
16
14
15
16
16
16
17
16
17
16
16
16
17
18
19
20
22
24
24
Feels °C
17
16
12
11
12
14
16
15
18
16
16
16
16
15
16
17
19
20
21
21
23
  • 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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