Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 pm 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 11 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 12PM (local time) - 2.5ft (0.8m), 13s period, SE swell with cross-offshore winds.
  • Most powerful swell: Thursday 13 Aug, 9AM (local time) - 2.5ft (0.7m), 16s period, SE swell with 239 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 6AM (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 11) at 6AM. The primary swell is predicted to be 0.6m and 13s period with a secondary swell of 0.7m and 5s. Another secondary swell of 0.7m 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 0.7m 16s and forecast to arrive on Thursday (Aug 13) at 9AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 8s period and expected on Tuesday (Aug 18) at 3AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 11th Aug)2ft (0.6m) 13s
Best Surf12PM (Tue 11th Aug)2.5ft (0.8m) 13s
Most Powerful 9AM (Thu 13th Aug)2.5ft (0.7m) 16s

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


The Lowdown

Righto, grab a coffee and let's chew the fat about what Prainha’s got cooking over the next couple of weeks. The good news is the swell sticks around, but we’ve got a bit of a mixed bag with conditions. For the keen ones, Thursday the 13th is the standout, but we have to pick our windows carefully outside of that.

The pattern kicks off with some small, average waves through Tuesday the 11th and Wednesday the 12th. You’ll find surfable 2ft to 2ft waves from the southeast, but the wind is mostly cross-off or cross-on, and the whole thing is pretty ordinary. The combined swell energy sits around 150 (moderate), but it’s not really doing anything special.

Now, Thursday morning the 13th, that’s our first real highlight. We get 2ft of swell from the southeast, but the period stretches out to a nice 16 seconds, bumping the combined energy up to 239 (moderate but punchy). The wind is a light cross-off from the south, so the lines should be pretty clean for a good session. This is the one to aim for.

After that, things get a bit messy. Friday the 14th offers a tiny 1ft glass-off in the morning, but the energy is weak at 80. The weekend and into next week sees a bigger pulse of swell, growing to 3ft from the east-southeast and east, but it gets chopped up by cross-onshore and onshore winds. The period drops to 8 or 9 seconds, so it’s just messy, short-period windswell. Not worth getting excited about.

The middle of the following week, from Tuesday the 18th to Thursday the 20th, gets a bit punchy with 4ft and 3ft from the east-southeast and east, but the wind is terrible – strong cross-shore or cross-onshore, making it a choppy mess. You’d want a kite for that, not a paddleboard.

The last few days of the forecast, from the 22nd through the 26th, are mostly tiny or poor. The best of the bunch is Monday morning the 24th with 2ft from the east and a clean offshore wind from the southwest, but it’s only got a short 7-second period, so the waves will be weak and won’t have much push. Then on Tuesday morning the 25th, we get a glassy 2ft with a long 15-second period, giving it a combined energy of 175 (moderate). That could be a sneaky fun session if you’re keen on a small, clean day.

So, if you’re only going to paddle out once, make it Thursday morning the 13th. That’s the cleanest, best-shaped window. After that, it’s a game of picking the least-worst conditions. Keep the faith, though – it tends not to stay poor for long around here.

Catch ya in the water.
Rusty.

Short Range Forecast

Light rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 17°C on Wed night, min 12°C on Tue afternoon). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 12mm), heaviest on Fri night. Warm (max 20°C on Sat morning, min 17°C on Thu night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
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
1
1
0
1
2
0
1
1
0
1
1
0
1
0
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
0.6
SE
13
0.7
SE
13
0.7
SE
12
0.7
SE
12
0.7
SE
12
0.6
SE
13
0.7
SE
16
0.7
SE
15
0.6
SE
13
0.4
SE
14
0.6
SE
15
0.6
SE
13
0.4
SE
12
0.6
SE
9
0.7
SE
8
0.7
SE
8
0.7
SE
9
0.9
ESE
8
Wave Graph
Metric surfscale
Energy kJ
108
136
156
148
148
144
100
239
212
113
64
136
109
50
67
72
67
81
113
Wind (km/h)
20
SSE
10
SW
15
S
10
SW
5
WSW
10
NNE
10
NW
10
S
25
SSE
5
NNW
5
SW
10
ESE
5
WNW
10
NW
10
NE
0
WSW
15
NE
5
ENE
5
ENE
Wind State
cross
cross-off
cross-off
off
off
cross-on
cross-off
cross-off
cross
glassy
glassy
cross-on
cross-off
cross-off
cross-on
glassy
cross-on
on
glassy
High Tide
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
8:20AM0.06m
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
cloud
cloud
light rain
cloud
cloud
part cloud
part cloud
part cloud
part cloud
cloud
cloud
rain showers
rain showers
rain showers
rain showers
light rain
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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>
5:52
5:52
5:52
5:52
5:53
5:53
 mm
2
1
3
2
2
4
Temp °C
16
14
13
13
14
16
17
17
17
17
19
19
19
20
20
20
19
20
20
Feels °C
12
13
11
12
14
15
17
16
15
18
20
20
21
21
21
23
20
23
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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