Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 pm 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 20 Jul 2026:

  • Best quality surf: Sunday 26 Jul, 12AM (local time) - 6.5ft (2.0m), 7s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Sunday 26 Jul, 12AM (local time) - 6.5ft (2.0m), 7s period, SSE swell with 418 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 9AM (local time) - 3ft (0.9m), 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 0.9m 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 2.0m 7s and forecast to arrive on Sunday (Jul 26) 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 1.5m 6s period and expected on Thursday (Jul 23) at 9AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Mon 20th Jul)3ft (0.9m) 8s
Best Surf12AM (Sun 26th Jul)6.5ft (2.0m) 7s
Most Powerful12AM (Sun 26th Jul)6.5ft (2.0m) 7s

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


The Lowdown

Alright, grab your board and let’s talk about what’s coming up at Prainha. The next couple of weeks start off pretty flat and messy – honestly, not much to get excited about until we hit the back end of July. The first real chance of a decent session doesn’t show up until Thursday morning, July 30. Before that, you’re looking at a long stretch of tiny, weak waves with onshore or cross‑shore winds, mostly under 3 ft and hardly any punch. The water’s sitting at 65°F which is dead average for this time of year, so no surprises there.

Thursday the 30th morning brings a pulse of 5 ft swell from the SSE, with a short period of 8 seconds. It’s not a groundswell, so the shape will be a bit lumpy, but the wind is clean offshore from the SW at 12 mph, and the combined energy reads 386 – that’s solid moderate power. It’s a proper session for advanced surfers, though the short period means it’ll be a bit quick and disorganised. Crowds can happen here sometimes, so don’t be surprised if a few others have the same idea.

Then things really turn on. Saturday August 1 afternoon, the swell drops to 3 ft but it’s coming from the SE with a period of 15 seconds – proper long‑period groundswell. That means better shaped waves, more energy in each set, and easier paddling between sets. Wind goes offshore from the SW at 6 mph, making for clean faces. Combined energy is 333, still moderate but quality is up. It’s a standout window.

But the true highlight is Sunday August 2 afternoon. The swell is 3 ft from the ESE, period 13 seconds, and the wind goes glassy – dead calm – with the ENE barely a whisper. Combined energy hits 532, the highest of the whole forecast, and the conditions are described as “very good” – glassy, long period, clean. This is the one to circle. The swell direction isn’t exactly the optimum S, but SE‑ESE still works well at Prainha. Expect some longer lulls, but when the sets come, they’ll have shape and push. A few crowds are possible, but with that quality it’s worth it.

Beyond the 2nd, the outlook fades quickly into the following week, so make the most of that window from July 30 through August 2. After that, it’s back to small, choppy junk.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 24°C on Sun night, min 18°C on Tue night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 54mm), heaviest during Fri night. Warm (max 23°C on Sat afternoon, min 16°C on Thu morning). Winds decreasing (fresh winds from the SSE on Wed night, calm by Fri morning).

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
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
0
1
0
0
0
0
0
0
0
1
1
0
1
1
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
E
8
0.9
E
8
0.9
E
8
0.1
S
11
0.9
E
8
0.9
E
8
0.1
S
10
0.8
E
8
0.8
E
8
0.6
N
4
0.7
E
8
0.8
SE
8
0.6
E
8
0.8
SE
9
0.8
SE
9
0.7
SE
9
0.8
E
7
0.8
SE
8
2
SSE
7
Wave Graph
Metric surfscale
Energy kJ
169
103
103
2
103
103
2
80
82
9
69
71
51
99
99
76
66
77
418
Wind (km/h)
10
NNW
5
WNW
5
E
5
WSW
0
WNW
5
ENE
10
NNW
20
S
5
SSE
10
WNW
30
S
20
S
10
S
5
S
20
ESE
10
S
5
WSW
10
SSW
15
SSW
Wind State
cross
glassy
on
glassy
glassy
on
cross
cross-off
cross
cross-off
cross-off
cross-off
cross-off
glassy
cross-on
cross-off
glassy
cross-off
cross-off
High Tide
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
11:02PM0.44m
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
part cloud
clear
clear
clear
clear
part cloud
cloud
cloud
light rain
light rain
cloud
light rain
light rain
mod rain
heavy rain
rain showers
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
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
5:42
5:42
5:43
5:43
5:44
 mm
3
2
2
5
8
33
1
Temp °C
24
20
21
21
22
23
24
19
20
20
17
17
17
16
16
17
20
23
19
Feels °C
21
19
22
22
22
23
24
18
21
19
14
14
16
17
14
16
21
22
16
  • 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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