Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 2 am 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
20.4°C
1.5° 

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


Prainha surf forecast from 5 Sep 2026:

  • Best quality surf: Monday 7 Sep, 6PM (local time) - 2ft (0.6m), 10s period, SE swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 3AM (local time) - 8ft (2.4m), 10s period, SSE swell with 1,023 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 6PM (local time) - 2ft (0.6m), 10s 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 Monday (Sep 07) at 6PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.2m and 8s. 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 2.4m 10s and forecast to arrive on Monday (Sep 07) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 5s period and expected on Saturday (Sep 12) at 9AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Mon 7th Sep)2ft (0.6m) 10s
Best Surf 6PM (Mon 7th Sep)2ft (0.6m) 10s
Most Powerful 3AM (Mon 7th Sep)8ft (2.4m) 10s

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


The Lowdown

Alright folks, Rusty here with a look at the upcoming stretch. We’re gonna be stuck in a bit of a flat spell to kick things off, but don’t let that get you down. The best of the action is shaping up for the second week, and it looks worth the wait.

First up, we’ve got Prainha. It’s an advanced, very consistent spot that’s exposed to the swell. Right now, the water’s sitting at 69°, which is a touch warmer than normal for the time of year – you might not need the thickest wetsuit just yet.

The first few days are a write-off. Saturday morning, September 5th, has a tiny 2ft easterly swell with weak energy (98), and a crosswind making a mess of things. That afternoon gets even worse with stronger wind. Sunday the 6th is equally poor. Monday the 7th morning sees a bit more size at 6ft from the SSE and the combined energy jumps to moderate (405), but the conditions are still marginal – not worth getting excited about. Tuesday the 8th morning improves slightly, with a tiny 3ft ESE swell and a clean offshore wind from the SW for the first time. The energy is still weak (105), so it’s just small, clean waves for a quick paddle if you’re desperate.

Then we hit a real gem on Wednesday morning, September 9th. We’ve got glassy conditions with the wind going dead calm from the NW. There’s a 4ft easterly swell with moderate energy (194). It’s surfable, but it’s nothing mind-blowing on its own. Still, you can’t beat flat water.

The whole first week is mostly small, weak, and messy. There’s a long gap of nothing special until we get to the real standout.

And here it is. The best window is the week of September 14th. Monday afternoon, the 14th, is the pick of the bunch. We get a 5ft ESE groundswell with a solid 12-second period and a very strong combined energy of 698. The wind is a light cross-off from the SSW, leaving it clean. That’s the kind of day you make plans for. It’s a powerful, lined-up swell for an advanced spot. Expect some sets to be a bit straight, as a long period groundswell like that can be at a beach, but with the right conditions, Prainha could be firing.

Tuesday morning, the 15th, is still very solid – a 4ft ESE swell, 11-second period, and clean offshore wind from the SW. It’s still pumping. The rest of that week settles down again, with some clean but smaller days, before another bump on Sunday the 20th morning, with a 5ft easterly swell, 8-second period, and a clean offshore wind. That’s a good, solid size for the advanced crew, clean and lined up.

So, bottom line: Don’t waste your time this week. Save your energy for that Monday, September 14th afternoon and the Tuesday after. That’s where the magic is.

Rusty.

Short Range Forecast

Heavy rain (total 31mm), heaviest during Sat afternoon. Very mild (max 16°C on Sat morning, min 12°C on Mon morning). Winds decreasing (fresh winds from the SSE on Sun afternoon, calm by Mon night).

Days 4-6 Weather Summary

Light rain (total 7mm), mostly falling on Wed night. Very mild (max 19°C on Wed afternoon, min 13°C on Tue morning). Wind will be generally light.

Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
1
0
1
1
0
1
1
0
0
1
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)
0.7
E
8
0.7
E
8
0.9
SE
6
0.5
E
8
1.1
SE
6
1.5
SE
10
1.7
SSE
8
0.4
SE
10
0.9
SE
7
0.9
ESE
7
1.1
E
8
1.1
E
8
1.1
E
8
1.1
E
8
1
E
8
0.8
E
8
0.8
E
8
0.7
E
8
0.6
E
8
0.7
E
8
0.5
E
7
Wave Graph
Metric surfscale
Energy kJ
69
68
46
28
67
424
336
27
69
89
138
153
165
167
132
82
80
57
42
57
27
Wind (km/h)
20
SSE
30
SSE
20
S
20
S
25
SE
25
S
20
SSW
15
S
10
WSW
10
SW
10
ENE
5
WNW
5
NW
15
NE
10
SSE
5
S
10
ENE
5
NNW
0
N
5
N
20
N
Wind State
cross
cross
cross-off
cross-off
cross
cross-off
cross-off
cross-off
off
off
on
cross-off
glassy
cross-on
cross
cross-off
on
glassy
glassy
glassy
cross-on
High Tide
10:43AM1.01m
10:43PM0.79m
12:01PM1.13m
11:48PM0.92m
12:52PM1.24m
00:36AM1.07m
1:31PM1.32m
1:16AM1.21m
2:05PM1.35m
1:52AM1.32m
2:37PM1.35m
2:28AM1.38m
3:06PM1.32m
Low Tide
7:03PM0.50m
6:36AM0.32m
7:37PM0.45m
7:12AM0.19m
8:04PM0.43m
7:41AM0.09m
8:23PM0.43m
8:02AM0.03m
8:27PM0.42m
8:16AM0.00m
8:16PM0.38m
8:27AM0.01m
8:19PM0.30m
light rain
heavy rain
heavy rain
part cloud
cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
rain showers
cloud
part cloud
cloud
cloud
rain showers
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:20
6:20
6:18
6:18
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:02
6:02
6:02
6:04
6:04
6:05
6:05
 mm
3
16
12
7
5
12
Temp °C
16
15
15
15
15
14
13
16
16
15
17
17
18
19
19
18
19
19
20
20
20
Feels °C
14
10
12
12
10
6
9
14
15
14
17
18
17
18
20
20
20
21
21
23
20
  • 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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