Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 am 25 Aug 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
19.7°C
1.1° 

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


Prainha surf forecast from 25 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 3AM (local time) - 1.5ft (0.5m), 16s period, SE swell with offshore winds.
  • Most powerful swell: Thursday 27 Aug, 12AM (local time) - 3.5ft (1.0m), 15s period, SE swell with 438 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 25 Aug, 3PM (local time) - 2ft (0.6m), 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 Tuesday (Aug 25) at 3PM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.1m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 1.0m 15s and forecast to arrive on Thursday (Aug 27) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 8s period and expected on Saturday (Aug 29) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Tue 25th Aug)2ft (0.6m) 13s
Best Surf 3AM (Wed 26th Aug)1.5ft (0.5m) 16s
Most Powerful12AM (Thu 27th Aug)3.5ft (1.0m) 15s

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


The Lowdown

Alright, this is Rusty comin' at ya from right here. Let’s have a good look at what’s on the table.

Right off the bat, we’ve got Prainha as our only option on the board. This spot is for the experienced crew—advanced only, and it breaks very consistently. The water’s sitting at 68°, which is a touch warmer than normal for this time of year, so you might get away with a thinner suit if you’ve got one.

The week kicks off on Tuesday morning, August 25th. It’s small, with a 2ft swell wrapping in from the southeast at 13 seconds, and the wind is glassy. It’s rideable, but nothing to write home about—just very ordinary conditions with weak energy (141). Tuesday afternoon goes flat calm, but still tiny.

Now, Wednesday morning, August 26th, is where things start to look good. The swell bumps up to 3ft from the southeast with a long 16-second period—proper groundswell energy—and the wind is offshore from the WSW at just 3 mph. That’s clean. The combined energy jumps to 348 (moderate), and the report says “expect good surf conditions.” This is the standout of the first few days. Prainha is an exposed spot, so that long-period SE swell will wrap in nicely.

Wednesday afternoon gets ruined by onshore wind, so morning is the move.

Thursday morning, August 27th, looks solid again: 3ft, SE, 14-second period, glassy with a light offshore. Clean and glassy. Good surf conditions again with 326 combined energy.

The weekend and into next week is a mixed bag. Friday morning, August 28th sees a shift—swell comes more east at 4ft but the period drops to just 7 seconds. That’s short-period windswell, weak energy (174). Glassy in the morning but choppy by afternoon. Saturday and Sunday follow a similar pattern: small, knee-to-waist high east swell, mostly weak energy, and the wind is variable. Nothing to get excited about.

Monday, August 31st has a bit of hope: 3ft, east, 9 seconds, with glassy conditions in the afternoon under light rain. Still very ordinary, but at least it’s clean.

The first week of September brings a bit of spice. Wednesday morning, September 2nd has 4ft southeast swell at 9 seconds, light cross-offshore wind, and good surf conditions with 224 energy. That’s a decent window.

But the real standout of the whole outlook? Sunday, September 6th. Both morning and afternoon are glassy—calm wind—with a 4ft to 5ft east swell at 9 seconds. That’s solid waist-to-chest high, clean, with combined energy of 264 in the morning and 320 in the afternoon. “Expect good surf conditions” for both sessions. That is the best looking day on the charts. After that, Monday morning, September 7th, still has clean 4ft waves with glassy conditions, but the onshore kicks in by afternoon.

Overall, the best windows are Wednesday August 26th morning, Thursday August 27th morning, Wednesday September 2nd morning, and then the standout Sunday September 6th all day and Monday September 7th morning. After that, the second week drops off into smaller, weaker, and more onshore conditions.

Crowds at Prainha can show up sometimes, so if you’re heading out on those good glassy mornings, you might have a few others in the water, but it’s worth it for the clean lines.

This is Rusty, signing off.

Short Range Forecast

Mostly dry. Warm (max 20°C on Thu afternoon, min 14°C on Tue morning). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 12mm), heaviest on Sun night. Warm (max 22°C on Sat morning, min 18°C on Sun night). Winds increasing (calm on Fri morning, fresh winds from the S by Sun night).

Tuesday
25
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
AM
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
1
2
0
1
2
0
0
1
0
1
1
0
0
0
0
1
1
1
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SE
13
0.6
SE
13
0.4
SE
16
0.8
SE
16
1
SE
15
1
SE
15
0.8
SE
14
0.7
SE
14
0.6
SE
13
1.1
E
7
1.1
E
8
1.2
E
8
1.1
E
8
1.2
E
9
1
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.9
E
9
0.8
E
9
Wave Graph
Metric surfscale
Energy kJ
140
104
73
348
421
438
293
179
106
123
146
186
161
210
159
130
127
134
132
126
99
Wind (km/h)
5
SW
0
ESE
10
NW
5
WSW
10
NE
5
NNE
5
SW
15
NE
15
NNE
0
NNE
15
NE
5
E
5
NNW
15
SE
25
S
10
SSE
10
SE
0
W
10
SW
5
NE
15
SSE
Wind State
glassy
glassy
cross-off
off
on
cross-on
glassy
on
cross-on
glassy
cross-on
glassy
glassy
cross
cross-off
cross
cross
glassy
cross-off
glassy
cross
High Tide
1:41PM1.28m
1:33AM1.23m
2:15PM1.34m
2:09AM1.33m
2:48PM1.38m
2:43AM1.39m
3:22PM1.39m
3:19AM1.41m
3:55PM1.35m
3:56AM1.39m
4:30PM1.28m
4:35AM1.33m
5:07PM1.17m
Low Tide
8:09PM0.38m
8:02AM0.05m
8:20PM0.34m
8:21AM0.00m
8:29PM0.31m
8:40AM-0.03m
8:43PM0.27m
9:01AM-0.02m
9:03PM0.24m
9:26AM0.02m
9:28PM0.22m
9:54AM0.11m
9:57PM0.22m
cloud
part cloud
part cloud
cloud
part cloud
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
rain showers
rain showers
mod rain
heavy rain
heavy rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:33
6:31
6:31
6:30
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:58
5:58
5:59
5:59
6:00
6:00
6:00
 mm
1
11
10
21
14
Temp °C
15
16
16
18
18
19
19
20
20
19
21
21
22
20
19
20
19
19
19
19
18
Feels °C
15
17
16
20
18
21
20
20
20
21
21
22
24
20
18
22
20
20
20
22
17
  • 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 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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