Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 8 pm 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
19.5°C
0.5° 

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


Prainha surf forecast from 13 Sep 2026:

  • Best quality surf: Monday 14 Sep, 6AM (local time) - 4.5ft (1.3m), 7s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Wednesday 16 Sep, 3AM (local time) - 5ft (1.6m), 8s period, SSE swell with 276 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 6AM (local time) - 4.5ft (1.3m), 7s period with SSE 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 14) at 6AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.8m and 5s. Another secondary swell of 0.3m and 8s 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 1.6m 8s and forecast to arrive on Wednesday (Sep 16) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Monday (Sep 14) at 9PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6AM (Mon 14th Sep)4.5ft (1.3m) 7s
Best Surf 6AM (Mon 14th Sep)4.5ft (1.3m) 7s
Most Powerful 3AM (Wed 16th Sep)5ft (1.6m) 8s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what this 16-day window has in store for us at Prainha.

Right off the bat, things are looking pretty bleak. The first couple of days are a write-off. Sunday the 13th and Monday the 14th deliver poor surf with messy cross-offshore winds and weak, short-period swell. Monday afternoon shows a tiny flicker of hope with surfable waves, but it’s ordinary. You’d be better off staying home. The water temp is sitting about average for this time of year, so don’t expect any surprises there.

The first real highlight comes on Tuesday morning, the 15th of September. We’ve got clean conditions with light offshore breezes from the WSW, and the swell is bumping up to 3ft from the ESE. It’s still got a short period of 8 seconds, but the combined energy reads at a moderate 276. The waves will be clean and lined up thanks to that offshore wind. This is the standout of the first week. Get out there early before the wind swings onshore in the afternoon and ruins it.

The middle of the week slips back into the ordinary. Wednesday and Thursday are poor, with cross-shore winds chopping things up. Thursday morning the 17th is glassy but tiny at 2ft, though a longer period groundswell of 12 seconds gives those waves some shape, but it’s still only surfable, not pumping.

Friday the 18th through to Tuesday the 22nd is a long stretch of “ordinary” surf. Waves hanging around 3ft to 4ft, mostly from the east, with inconsistent energy and varying winds. Nothing here will get your heart racing. Friday afternoon and Saturday morning do offer glassy conditions, but the swell is just too small and weak to make it worth a special trip.

Looking further out, Sunday the 27th of September shows some promise with light WSW winds and 3ft swell from the east, period of 8 seconds, and clean conditions. That’s about as good as it gets in the second week, but it’s still very ordinary. The following Monday, the 28th, is similar but with cross-offshore winds. Energy remains moderate throughout, but the waves just don’t have any punch.

Truth is, the pick of the entire 16 days is hands-down Tuesday morning the 15th of September. It’s the only day with a decent swell, clean offshore wind, and enough energy to get a proper wave. For the rest, it’s a lot of waiting and watching for something better to come through. Crowds are possible at Prainha if you hit the good windows, so be ready for company. If you’re a beginner, the size is mostly manageable, but the quality will be disappointing.

Stay patient, it tends not to stay this flat for long.

Rusty

Short Range Forecast

Heavy rain (total 52mm), heaviest during Sun afternoon. Very mild (max 17°C on Sat night, min 13°C on Mon afternoon). Winds decreasing (fresh winds from the S on Sun afternoon, light winds from the WSW by Tue morning).

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Thu night. Very mild (max 18°C on Thu morning, min 16°C on Tue night). Wind will be generally light.

Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
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
1
2
2
0
0
0
0
0
1
0
0
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
SE
7
1.1
SE
6
1
SE
6
1
SE
6
1.4
SE
6
0.8
ESE
5
1.2
ESE
8
1
ESE
8
1
ESE
8
1.2
SE
8
1.3
SSE
8
1.4
SSE
8
1.4
SSE
8
0.7
SE
12
0.6
SE
11
0.4
SE
12
1.2
ENE
6
0.9
E
6
0.8
E
7
Wave Graph
Metric surfscale
Energy kJ
156
94
73
75
114
37
178
140
125
177
176
221
262
134
73
52
84
60
59
Wind (km/h)
20
S
25
S
30
S
25
SSW
15
SSW
20
SW
10
SW
5
WSW
15
ENE
25
SSE
15
SSE
20
SE
20
SE
5
ENE
15
ENE
20
NE
10
NW
5
SSW
10
WSW
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
off
on
cross
cross
cross
cross
glassy
on
cross-on
cross-off
glassy
off
High Tide
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
7:47AM0.87m
2:57PM0.84m
7:29PM0.75m
Low Tide
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
11:26AM0.65m
6:08PM0.74m
heavy rain
light rain
mod rain
heavy rain
light rain
light rain
rain showers
clear
part cloud
cloud
cloud
part cloud
cloud
part cloud
clear
light rain
light rain
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:13
6:11
6:09
6:09
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:05
6:06
6:06
6:07
6:07
6:07
6:07
 mm
13
5
9
16
4
3
2
1
1
3
Temp °C
17
15
15
15
14
13
14
17
17
17
16
17
16
18
18
18
17
18
17
Feels °C
13
11
11
11
12
10
12
16
15
14
13
14
13
15
15
14
17
19
18
  • 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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