Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 2 am 19 Jul 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
18.3° C
0.1° 

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


Prainha surf forecast from 19 Jul 2026:

  • Best quality surf: Friday 24 Jul, 12AM (local time) - 4.5ft (1.4m), 9s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Friday 24 Jul, 12AM (local time) - 4.5ft (1.4m), 9s period, SSE swell with 318 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 9AM (local time) - 3.5ft (1.0m), 8s period with E 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 20) at 9AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.1m and 12s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 1.4m 9s and forecast to arrive on Friday (Jul 24) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 8s period and expected on Sunday (Jul 19) at 9PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Mon 20th Jul)3.5ft (1.0m) 8s
Best Surf12AM (Fri 24th Jul)4.5ft (1.4m) 9s
Most Powerful12AM (Fri 24th Jul)4.5ft (1.4m) 9s

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


The Lowdown

Alright, Rusty here, let’s talk about what’s heading our way.

Look, I’m not gonna sugarcoat it – the next couple of weeks are looking pretty quiet. We’re stuck in a real flat spell with only small, unremarkable swell bumping in. The best we’ve got is a few mornings that might be worth a look if you’re desperate for a paddle, but nothing that’s gonna get the heart racing.

The main break in the picture is Prainha. Water temp is sitting at 65°, which is just about bang on average for this time of year, so no surprises there. The energy in the water is mostly weak, with the combined energy reading only hitting a moderate 130 on Monday the 20th and a weak 101 on Sunday the 19th. The swell direction is swinging from east to southeast, which isn't the optimum southerly direction this place really wants to fire.

Your best bet across the whole period looks like Monday morning, July 20. It’s not a classic, but with the wind going glassy and the swell nudging 3 ft from the east at 8 seconds, it’ll be clean and surfable. The combined energy is 130 – that’s the highest moderate reading we’ve got. Not a standout in any big sense, but the best of a very average bunch.

Sunday morning, July 19 is similar – 3 ft east swell, light cross-offshore breeze, and a combined energy of 101. It’s surfable, but very ordinary. Tuesday morning, July 21 also offers a clean 3 ft east swell with glassy conditions, but again, it’s nothing special.

Things drop right off after that. We get a bit of a bump on Thursday the 23rd where the combined energy hits 232 from a south-southeast direction, but the wind is a messy cross-shore at 12 mph, so it’ll be choppy. That’s a classic case of swell energy without the quality. Same story on Friday the 24th – 3 ft from the southeast at 164 combined energy, but with a cross-shore breeze.

From Saturday July 26 right through to the end of the forecast on August 3, the swell stays tiny and inconsistent, rarely pushing above 2 ft. A lot of those days have glassy mornings, but with such small waves, it’s really only a longboard or a foiler that’s gonna get any joy. The periods are mostly short too, around 7 to 9 seconds, so there’s no grunt behind them.

One slightly interesting note – Tuesday morning, July 28 sees a long period 14-second southeast swell, but it’s only 1 ft. That’s a classic case of a groundswell that looks good on paper but just doesn’t have the size to make anything of it at a beach break. Combined energy is 100, so it’s borderline moderate.

Prainha is a consistent spot and can handle a bit of swell, but with the direction constantly off the optimum, and the size so small, it’s really a week of small, clean but weak surf. The crowds are sometimes an issue here, but with conditions this average, I wouldn’t expect a packed lineup.

Honestly, if this keeps up, you might be better off leaving the board in the car and just enjoying the beach. The forecasts can change, but for now, this is a real slow run.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Sun afternoon, min 18°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 19mm), heaviest on Wed night. Very mild (max 19°C on Wed morning, min 16°C on Thu night). Wind will be generally light.

Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
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
0
0
1
0
0
1
0
0
0
1
0
0
0
2
0
0
1
1
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)
0.9
E
8
0.1
S
13
1.7
ENE
8
1
E
8
0.9
E
8
0.1
S
11
0.9
E
8
0.6
NNE
3
0.1
SE
10
0.7
E
8
0.7
E
8
0.7
N
4
0.9
SSE
9
0.7
E
8
1.4
SSE
9
0.8
SE
9
0.8
SE
9
0.8
SE
9
0.6
SE
8
0.8
ESE
8
0.7
ESE
8
Wave Graph
Metric surfscale
Energy kJ
95
3
0
127
103
2
105
9
4
64
64
17
135
69
318
114
112
93
53
78
54
Wind (km/h)
10
NW
15
NE
10
N
5
NW
10
ESE
5
WNW
5
NNW
5
E
5
WNW
25
SW
5
WNW
20
N
20
SSE
20
SSW
15
SSW
15
SSW
10
SSE
5
SW
5
SSW
10
E
5
WNW
Wind State
cross-off
cross-on
cross
glassy
cross-on
glassy
glassy
glassy
glassy
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-off
cross
off
cross-off
cross-on
glassy
High Tide
6:40PM1.00m
6:40AM1.07m
7:21PM0.93m
7:41AM0.99m
8:11PM0.88m
8:54AM0.93m
4:18PM0.68m
9:14PM0.85m
10:17AM0.93m
10:25PM0.85m
11:34AM0.99m
11:33PM0.90m
12:35PM1.08m
00:28AM0.97m
Low Tide
11:02AM0.25m
11:02PM0.44m
11:39AM0.36m
11:46PM0.44m
12:20PM0.48m
00:39AM0.47m
1:13PM0.60m
1:52AM0.50m
6:26PM0.63m
5:56AM0.45m
7:10PM0.56m
6:41AM0.35m
7:43PM0.51m
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
light rain
light rain
heavy rain
light rain
light rain
cloud
part cloud
rain showers
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:58
6:58
6:58
6:58
6:58
6:56
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:40
5:40
5:42
5:42
5:43
5:43
5:44
 mm
1
4
11
1
1
1
Temp °C
22
25
22
21
22
22
22
23
24
19
19
19
17
17
16
17
18
18
17
18
18
Feels °C
20
22
20
20
22
23
22
23
23
17
21
19
16
15
15
16
17
18
17
18
19
  • 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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