Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 2 pm 12 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 12 Aug 2026:

  • Best quality surf: Thursday 13 Aug, 9AM (local time) - 2.5ft (0.7m), 16s period, SE swell with cross-offshore winds.
  • Most powerful swell: Monday 17 Aug, 3PM (local time) - 4.5ft (1.3m), 9s period, E swell with 276 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 12 Aug, 9PM (local time) - 2ft (0.6m), 12s 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 Wednesday (Aug 12) at 9PM. The primary swell is predicted to be 0.6m and 12s period with a secondary swell of 0.3m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 1.3m 9s and forecast to arrive on Monday (Aug 17) at 3PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Aug 18) at 12PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Wed 12th Aug)2ft (0.6m) 12s
Best Surf 9AM (Thu 13th Aug)2.5ft (0.7m) 16s
Most Powerful 3PM (Mon 17th Aug)4.5ft (1.3m) 9s

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


The Lowdown

Alright, surfers, Rusty here. Let's look at what Prainha has cookin' for us over the next couple of weeks. It's a bit of a mixed bag, but there are a few windows of opportunity if you're patient and picky.

The water is runnin' a touch warmer than usual for this time of year, sittin' around 68°, which is a nice bonus to start with.

We kick things off Wednesday, August 12th, with a tiny pulse of 2ft SE swell. The energy is pretty weak (145), but the wind is dead glassy. It will be surfable, but really, it's just a warm-up.

Things get a whole lot more interesting on the morning of Thursday, August 13th. That same 2ft from the SE is carrying some serious grunt, with a very long 16-second period and moderate energy (240). The wind is a clean cross-offshore from the south, so expect some clean, lined-up waves. This is a standout window for the good surfer on a longer board. The long-period groundswell means it’ll be a bit more peaky at a beach break like this, but the quality looks great.

Friday, August 14th, sees the swell drop off, but we get glassy conditions both morning and afternoon. It’s small, but clean.

Now, brace yourselves. From Saturday, August 15th, through to the morning of Tuesday, August 19th, we’re in a rough patch. The wind turns onshore and cross-onshore, and the swell gets a short, weak period with combined energies that just look messy. It’s a no-go for paddle surfing; frankly, with those winds, the setup looks more interesting for kite surfing than a paddle session.

The morning of Wednesday, August 19th brings another glassy calm, but with only 3ft of weak E swell. Clean, but small.

We then go into another long, dull run from the afternoon of the 19th through the 22nd. Small, onshore, and forgettable.

But hold on to your boards, because a real standout is brewing for later on. Sunday, August 23rd, is our top call. The morning is showing a solid 4ft of SE swell with a nice 12-second period. The combined energy is a solid 442, a big jump. And the best part? Glassy conditions from a light WSW wind. This is the real deal – clean, strong, and with some push. It’s still fine for most experienced surfers, but if you’re a beginner, that 4ft might be a bit of a handful.

Following that, Monday morning, August 24th, and Tuesday morning, August 25th, also offer up clean conditions with light offshore or cross-offshore winds and decent 3ft SE groundswell. Good follow-up sessions, but the 23rd is the one to circle.

The outlook fades again after Tuesday afternoon as the wind picks back up. So, keep your eyes on that Sunday the 23rd for the best chance of some memorable waves with no fuss.

Rusty.

Short Range Forecast

Heavy rain (total 52mm), heaviest during Fri night. Very mild (max 19°C on Sat morning, min 14°C on Wed afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Sat afternoon. Warm (max 20°C on Sun night, min 16°C on Mon night). Mainly fresh winds.

Wed
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
2
1
1
1
1
0
0
0
0
0
0
0
1
0
2
0
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)
0.7
SE
12
0.6
SE
12
0.7
SE
16
0.7
SE
15
0.6
SE
13
0.4
SE
13
0.6
SE
14
0.6
SE
13
1
ESE
8
1
ESE
8
1.1
ESE
8
1.2
E
8
1.2
E
8
1.3
E
8
1.3
E
9
1.3
E
9
1.3
E
9
1.2
E
9
1.2
E
9
1
E
9
Wave Graph
Metric surfscale
Energy kJ
144
126
239
212
109
59
127
113
125
133
151
190
195
241
252
276
274
230
235
159
Wind (km/h)
0
WNW
5
NW
5
S
15
SSE
0
SSE
5
S
5
SE
15
NNE
10
N
20
NNE
10
N
15
NE
10
E
10
NE
5
N
10
NE
5
S
25
SSE
30
SSE
10
SSE
Wind State
glassy
cross-off
cross-off
cross
glassy
glassy
glassy
cross-on
cross
cross-on
cross-on
on
cross-on
on
cross
on
glassy
cross
cross
cross
High Tide
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
5:17AM1.19m
5:41PM1.02m
6:01AM1.08m
6:13PM0.94m
Low Tide
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
10:27AM0.25m
10:32PM0.27m
10:56AM0.37m
11:08PM0.31m
cloud
part cloud
part cloud
rain showers
mod rain
light rain
light rain
heavy rain
light rain
rain showers
part cloud
part cloud
cloud
cloud
part cloud
clear
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:43
6:43
6:41
6:41
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:52
5:53
5:53
5:54
5:54
 mm
2
6
4
5
30
5
2
Temp °C
15
15
17
18
18
18
18
18
19
19
19
19
19
20
20
20
20
16
16
16
Feels °C
16
15
17
17
20
20
20
18
20
18
19
20
20
22
21
21
22
13
11
15
  • 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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