Prainha Surf Break

Lat Long: 26.23° S 48.50° W

Prainha Surf Forecast and Surf Report

Issued: 2 pm 16 Aug 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
19.6° C
1.3° 

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


Prainha surf forecast from 17 Aug 2026:

  • Best quality surf: Tuesday 18 Aug, 9AM (local time) - 3.5ft (1.0m), 8s period, E swell with glassy winds.
  • Most powerful swell: Saturday 22 Aug, 3AM (local time) - 3.5ft (1.1m), 10s period, SE swell with 222 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 18 Aug, 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 Tuesday (Aug 18) at 9AM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.2m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 1.1m 10s and forecast to arrive on Saturday (Aug 22) 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 0.5m 8s period and expected on Saturday (Aug 22) at 6AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9AM (Tue 18th Aug)3.5ft (1.0m) 8s
Best Surf 9AM (Tue 18th Aug)3.5ft (1.0m) 8s
Most Powerful 3AM (Sat 22nd Aug)3.5ft (1.1m) 10s

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's cookin' over the next couple of weeks.

Right off the bat, I gotta be straight with you – it's a slow start. We've got nothing worth paddling out for until Tuesday the 18th, so that's a couple of days of flat or junk surf to sit through. The waiting game is on.

The first real glimmer of hope comes Tuesday morning, the 18th of August. We're looking at a small 3ft easterly swell with a short 8-second period – not much grunt there. The combined energy is only 140 (weak). But the wind goes glassy, dead calm. That's a major positive. For an advanced spot like Prainha, you might get a few clean, slow rollers, but it's hardly a standout. The water temp is sitting about 67°, which is a touch warmer than normal for this time of year.

Honestly, the whole first week is pretty average. We see a few mornings with clean conditions – like Friday the 21st with a light offshore breeze from the WSW and a tiny 3ft swell, and the 31st with another light offshore – but the waves are just too weak and short-period to get excited about. Most afternoons get chopped up by onshore breezes.

Now, let's talk about the one true stand-out in this whole forecast. You need to mark your calendar for a few days' time: Tuesday, the 25th of August. The morning session sees a bump in swell to 5ft from the SSE, with a period stretching out to 11 seconds. The combined energy jumps to a solid 671 (strong to very strong). The wind is cross-off from the SW, meaning clean, lined-up faces at an exposed spot like Prainha. This is the heaviest swell on offer, and while the 5ft is manageable for most, the strength behind it will make for some proper waves. This is the pick of the window for experienced surfers. There might be a few others out, as crowds are listed as "sometimes".

After that, the energy drops off a cliff. We get another shot on Thursday the 27th, with the morning completely glassy and a clean 4ft easterly swell. It's a nice morning wave with a combined energy of 201 (moderate), but nothing compared to the Tuesday punch. The following week looks pretty slim again with small, messy conditions.

So, if you're keen, hold out for the 25th. The rest is mostly a waiting game for the next proper pulse.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 23°C on Tue afternoon, min 18°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 23°C on Fri afternoon, min 16°C on Fri night). Wind will be generally light.

Sun
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Saturday
22
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
1
0
0
0
0
1
0
0
1
1
1
0
0
0
0
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
E
8
1.2
E
8
1.2
E
8
1.2
E
8
1.1
E
8
1
E
8
1
E
8
1
E
8
0.9
E
8
0.8
E
8
0.7
E
8
0.7
E
8
0.6
E
8
0.8
E
7
0.9
E
7
0.8
E
8
1
SE
10
0.8
SE
5
0.4
SE
12
0.4
SE
13
Wave Graph
Metric surfscale
Energy kJ
164
163
185
199
163
132
136
136
102
74
57
58
42
70
87
78
192
30
35
42
Wind (km/h)
15
NE
15
NE
10
NNE
15
ENE
15
NNE
5
NNW
10
NNE
5
NE
20
S
20
SSE
10
WSW
10
N
15
NE
10
WSW
15
WSW
15
S
20
SE
10
SE
10
ESE
10
ENE
Wind State
on
cross-on
cross-on
on
cross-on
glassy
cross-on
on
cross-off
cross
off
cross
on
off
off
cross-off
cross
cross-on
cross-on
on
High Tide
5:12PM1.10m
5:17AM1.19m
5:41PM1.02m
6:01AM1.08m
6:13PM0.94m
6:57AM0.97m
6:56PM0.85m
8:16AM0.89m
3:35PM0.79m
8:15PM0.78m
4:21AM0.59m
3:08PM0.78m
9:53PM0.78m
11:24AM0.96m
11:16PM0.86m
Low Tide
9:59PM0.28m
10:27AM0.25m
10:32PM0.27m
10:56AM0.37m
11:08PM0.31m
11:29AM0.50m
11:50PM0.37m
12:09PM0.63m
6:01PM0.74m
5:01AM0.59m
1:12PM0.76m
6:41PM0.65m
6:06AM0.46m
7:09PM0.56m
cloud
cloud
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
cloud
part cloud
clear
clear
part cloud
cloud
cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:39
6:39
6:37
6:37
6:37
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:54
5:54
5:54
5:55
5:55
5:57
 mm
2
Temp °C
19
19
20
20
19
21
23
23
18
17
18
19
19
21
22
23
18
16
16
17
Feels °C
19
19
22
20
19
22
24
24
17
16
19
19
19
22
19
20
15
15
15
16
  • Map Icons:
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  • 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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