Prainha Surf Break

Lat Long: 29.47° S 49.82° W

Prainha Surf Forecast and Surf Report

Issued: 2 am 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Prainha sea temperature is
18.8° C
1.6° 

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


Prainha surf forecast from 5 Aug 2026:

  • Best quality surf: Friday 7 Aug, 6PM (local time) - 10ft (3.0m), 12s period, SSW swell with cross-shore winds.
  • Most powerful swell: Friday 7 Aug, 6PM (local time) - 10ft (3.0m), 12s period, SSW swell with 2,053 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 12PM (local time) - 2.5ft (0.7m), 10s 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 Wednesday (Aug 05) at 12PM. The primary swell is predicted to be 0.7m and 10s period with a secondary swell of 0.6m and 6s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Prainha in the next 16 days are 3.0m 12s and forecast to arrive on Friday (Aug 07) at 6PM. 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 8s period and expected on Friday (Aug 07) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12PM (Wed 5th Aug)2.5ft (0.7m) 10s
Best Surf 6PM (Fri 7th Aug)10ft (3.0m) 12s
Most Powerful 6PM (Fri 7th Aug)10ft (3.0m) 12s

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


The Lowdown

Alright, surfers, Rusty here. Let's get into it. The long-range maps are showing a pretty quiet stretch ahead, so we gotta be patient. The next 16 days are all about picking the right windows and not getting too greedy.

Right off the bat, the first couple of days are pretty much a bust. We're looking at some small, weak swell with a touch of rain and light cross-shore winds. The energy is real low, sitting around 117-122 (moderate at best), and the waves are gutless. Not worth paddling out for.

We've got a bit of a lull for a day or two after that, where the swell just drops away. The energy numbers fall right off the cliff down into the 13-62 range, which is weak. It's a good time to wax your board or fix a ding, 'cause there's nothing happening.

Then, things start to wake up a bit around Saturday the 8th. The swell builds to chest-high, around 6ft, with a longer period of 12 seconds. The energy jumps considerably, hitting 961-1002 (strong). The morning is looking a little average, but Saturday afternoon (August 8th) is a real highlight. The wind goes glassy, the swell is solid, and it's coming from the SSE. This is one of the better windows, but it's still just a step below the best we'll see.

Sunday the 9th gets messy with a cross-onshore wind and a building swell that's a bit jumbled. The period drops back to 9 seconds, and it's not great. We'll skip that.

Monday the 10th has a clean morning with a cross-offshore wind and a nice 4ft of SSE swell at 13 seconds. That's another good one, but the afternoon gets a bit cross-shore again.

After that, the middle of the week holds some promise. Tuesday the 11th is rideable, but nothing special. The standout is Wednesday morning, August 12th. We've got 5-6ft of clean SSE swell at 12 seconds, and the wind is light and offshore. The energy is pumping at 787 (strong). This one is looking clean.

But hold on, the real gem of the whole forecast is Thursday afternoon, August 13th. The swell jumps to a solid 6ft, the period stretches way out to 15 seconds, and it's dead glassy. The energy reading is massive, at 1511 (very strong). This is proper groundswell, and it's going to be firing. The water is also a touch warmer than normal, around 66°, so it's comfortable. This is the one to circle on the calendar.

The weekend after that gets a bit mixed. Friday the 14th has another clean afternoon with some glassy conditions, but the wind is a little more on it. The energy is still up there, but it's not as clean as Thursday. Saturday the 15th gets blown out by a fresh cross-onshore wind, so it's not ideal.

Then we have a lull, a couple of days of not much. The energy drops right out again in the 47-179 range. It's looking flat.

But hold on, the long-range models are showing something interesting for Monday the 17th. The afternoon has a big 8ft east swell, but with a short 10-second period. The wind is offshore and clean, and the energy is massive at 1612 (very strong). This is big, powerful, and dumping. This one is only for the experienced. If you're a beginner, stay out of the water. This is expert territory.

The last few days of the window, the 18th through the 20th, see the swell settle down. We have some clean, glassy mornings with a mix of east and south swells in the 3-6ft range. Nothing giant, but some fun, clean waves if you're just looking to get wet.

So, to sum it up: The standout session is Thursday afternoon, August 13th, at Prainha. It's got quality, size, and perfect conditions. The Saturday morning, August 8th, and the Monday afternoon, August 17th, are also worth a look, but for different reasons. The 17th is big and powerful, not for the faint of heart. The 8th is a good solid session, but the 13th is the one with the magic.

Keep your eyes on the charts, 'cause the long-range stuff is always a bit of a gamble, but this one has some real potential.

Rusty, out.

Short Range Forecast

Light rain (total 5mm), mostly falling on Wed morning. Warm (max 21°C on Thu morning, min 10°C on Fri night). Winds increasing (calm on Wed morning, fresh winds from the WSW by Thu night).

Days 4-6 Weather Summary

Some drizzle, heaviest during Sat afternoon. Very mild (max 17°C on Sat afternoon, min 12°C on Sat morning). Wind will be generally light.

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
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
1
1
1
0
0
0
0
4
3
3
2
0
1
2
3
1
1
2
1
2
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
SSE
10
0.7
SSE
10
0.6
SSE
9
0.5
SSE
9
0.5
SSE
9
0.3
SSE
11
0.2
S
10
1.4
SSW
9
1.9
S
12
1.9
SSE
12
1.8
SSE
12
1.6
SSE
12
1.1
SSE
11
1.8
S
9
1.4
SSE
11
1.3
SSE
13
1.3
S
12
1.4
S
11
1.4
SSE
10
1.5
SSE
10
1.4
SSE
11
Wave Graph
Metric surfscale
Energy kJ
86
85
56
45
44
28
7
333
1048
1002
901
718
275
568
478
554
497
457
386
399
469
Wind (km/h)
5
NE
5
ENE
10
N
5
N
10
ENE
10
NW
20
WSW
30
SW
5
SW
15
N
5
ENE
20
SW
20
SSW
15
S
0
ESE
5
SW
15
S
15
SSW
15
SW
15
S
5
SE
Wind State
cross
glassy
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
cross-off
cross
cross-on
glassy
cross-off
cross
cross
cross-off
cross
glassy
High Tide
10:18AM0.37m
4:36PM0.34m
11:03PM0.34m
5:11AM0.40m
4:59PM0.31m
11:56PM0.32m
6:13AM0.33m
12:15PM0.55m
00:45AM0.31m
1:11PM0.63m
1:30AM0.29m
2:07PM0.67m
2:12AM0.27m
3:03PM0.67m
9:30PM0.30m
4:00PM0.64m
10:49PM0.39m
Low Tide
1:36PM0.19m
7:48PM0.17m
8:00AM0.29m
2:55PM0.26m
8:28PM0.13m
8:14AM0.29m
9:12PM0.12m
4:09AM0.15m
10:02PM0.14m
5:22AM0.08m
11:09PM0.18m
6:23AM0.01m
8:02PM0.29m
7:13AM-0.05m
8:17PM0.32m
light rain
rain showers
part cloud
clear
clear
rain showers
part cloud
clear
clear
part cloud
light rain
clear
part cloud
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:00
6:58
6:58
6:58
6:56
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:49
5:50
5:50
5:51
5:52
5:52
5:52
 mm
1
2
2
1
Temp °C
19
19
18
21
21
20
17
17
12
16
17
15
13
13
13
13
14
13
14
14
14
Feels °C
21
21
18
22
21
20
12
11
8
13
17
12
9
9
11
11
11
9
11
10
12
  • 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 17 km (11 miles) from Torres. If you plan a holiday in Rio Grande Do Sul, look for hotels and other accommodation in Torres. Torres has rooms for a wide range of budgets as well as car hire and transport links.

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