Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 am 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
19.5°C
0.6° 

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


Prainha surf forecast from 11 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 6AM (local time) - 5ft (1.6m), 9s period, ESE swell with offshore winds.
  • Most powerful swell: Monday 14 Sep, 9PM (local time) - 8ft (2.5m), 8s period, ESE swell with 827 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 15 Sep, 6AM (local time) - 5ft (1.6m), 9s period with ESE 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 (Sep 15) at 6AM. The primary swell is predicted to be 1.6m and 9s period with a secondary swell of 0.3m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 2.5m 8s and forecast to arrive on Monday (Sep 14) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Friday (Sep 18) at 6AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Tue 15th Sep)5ft (1.6m) 9s
Best Surf 6AM (Tue 15th Sep)5ft (1.6m) 9s
Most Powerful 9PM (Mon 14th Sep)8ft (2.5m) 8s

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


The Lowdown

Alright, this is Rusty. Let’s have a look at what’s coming up for Prainha over the next couple of weeks.

Straight up, I’ve got to be honest with you – it’s a pretty bleak outlook for the next week or so. There’s a lot of junk in the water and the wind is mostly working against us. The first real glimmer of hope doesn’t show up until Tuesday the 15th, and even then it’s a short-lived window.

The pattern is dominated by small, weak, and short-period swell for days on end, with a lot of cross-shore and onshore wind. You’ve got a bit of a run of what I’d call “character-building” surf from Friday the 11th right through to Monday the 14th. We’re talking tiny waves, often under 3 ft, with short periods from 5 to 8 seconds, and combined energy readings in the double-digits to low triple-digits – that’s weak energy (59 to 474). The wind is mostly cross or cross-on, and the water temp is sitting around 67°, which is pretty average for the time of year.

Now, Tuesday the 15th is the one to circle. The morning shows some promise. We’ve got a 5 ft swell from the ESE, with a period of 9 seconds, and a clean offshore wind from the SW at just 6 mph. The combined energy is moderate at 399, and the conditions are described as clean. That’s about as good as it gets in this forecast. Prainha is an advanced, very consistent break that’s exposed to the swell, and with that light offshore wind, the faces should be pretty tidy. Just keep in the back of your mind that it’s an advanced spot, and that SW wind is light, so it’s not a total guarantee of perfection, but it’s the standout.

After that morning session on Tuesday, the quality drops right back off. The rest of that week and into the weekend sees the swell hanging around the 3 ft to 4 ft mark, but the wind swings around to cross and onshore again. There’s a few moments with clean conditions on the 18th and 19th mornings, but the swell is short-period and the energy is low, so you’re looking at ordinary, lumpy waves at best.

Looking way out to the 24th and 25th, there are a couple of glassy mornings with tiny, long-period swell from the SE and ESE. On the 25th we get a 1 ft swell from the ESE with an 11-second period and glassed-off conditions – a true morning for a log if you’re desperate, but it’s small. The energy readings are in the 80s (86 specifically), so weak.

Honestly, your best bet in the whole 16-day window is that Tuesday the 15th morning. It’s not a huge swell, but a clean 5 ft with offshore wind at a spot like Prainha is worth a crack. Everything else is either too small, too windy, or too chopped up to get excited about. If you’re itching for a paddle, keep an eye on the forecasts, but right now it looks like a waiting game.

Rusty.

Short Range Forecast

Heavy rain (total 117mm), heaviest during Sun night. Warm (max 20°C on Fri afternoon, min 15°C on Sat night). Winds increasing (calm on Fri night, fresh winds from the ESE by Sun night).

Days 4-6 Weather Summary

Moderate rain (total 18mm), heaviest on Mon afternoon. Very mild (max 18°C on Tue morning, min 15°C on Mon night). Wind will be generally light.

Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
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
0
0
0
0
0
1
2
0
0
0
0
0
0
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
E
8
0.1
E
13
0.4
E
8
0.8
SE
5
1.3
SE
7
1.3
SSE
7
0.9
ESE
6
0.7
SE
8
1.3
ESE
6
1.6
E
7
1.3
ESE
8
1.6
ESE
9
1.6
ESE
9
1.5
ESE
9
1.1
E
8
1.2
ESE
8
1.1
SE
8
1.1
SE
8
0.5
SE
12
0.4
SE
12
0.6
SE
13
Wave Graph
Metric surfscale
Energy kJ
40
6
18
28
144
160
57
68
123
254
202
404
374
329
173
175
133
142
69
52
113
Wind (km/h)
15
N
10
NE
10
N
30
SSE
30
SE
20
S
25
S
20
ESE
35
ESE
25
E
20
ESE
20
SSW
10
SW
10
E
10
NNW
20
SSE
15
SE
25
SE
5
SE
5
SW
20
NE
Wind State
cross
cross-on
cross-on
cross
cross
cross-off
cross-off
cross-on
cross-on
cross-on
cross-on
cross-off
off
cross-on
cross
cross
cross
cross
cross
off
cross-on
High Tide
3:06PM1.32m
3:02AM1.40m
3:34PM1.27m
3:36AM1.37m
4:00PM1.20m
4:11AM1.30m
4:24PM1.12m
4:47AM1.20m
4:46PM1.03m
5:29AM1.08m
5:05PM0.94m
6:25AM0.96m
3:17PM0.86m
Low Tide
8:19PM0.30m
8:43AM0.05m
8:38PM0.22m
9:03AM0.11m
9:02PM0.16m
9:27AM0.19m
9:31PM0.14m
9:52AM0.29m
10:01PM0.16m
10:20AM0.40m
10:35PM0.22m
10:50AM0.52m
11:13PM0.32m
rain showers
rain showers
mod rain
light rain
light rain
heavy rain
heavy rain
heavy rain
heavy rain
light rain
light rain
rain showers
part cloud
clear
rain showers
rain showers
part cloud
light rain
cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:15
6:13
6:13
6:11
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:05
6:05
6:06
6:06
6:07
6:07
6:07
 mm
3
1
10
2
3
34
14
19
31
4
5
3
1
2
3
Temp °C
19
20
20
17
17
16
16
16
17
17
17
17
18
18
18
18
18
16
16
17
18
Feels °C
19
21
20
13
12
13
13
14
12
14
15
15
18
17
18
16
16
12
15
17
15
  • 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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