
Surf Forecasts:
Prainha surf forecast from 5 Aug 2026:
- Best quality surf: Saturday 8 Aug, 12AM (local time) - 6ft (1.8m), 12s period, S swell with glassy winds.
- Most powerful swell: Friday 7 Aug, 9PM (local time) - 8ft (2.5m), 12s period, S swell with 1,750 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 6AM (local time) - 2.5ft (0.8m), 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 6AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.6m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 2.5m 12s and forecast to arrive on Friday (Aug 07) 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 1.0m 5s period and expected on Friday (Aug 07) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Wed 5th Aug) | 2.5ft (0.8m) 10s |
| Best Surf | 12AM (Sat 8th Aug) | 6ft (1.8m) 12s |
| Most Powerful | 9PM (Fri 7th Aug) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, let’s get into it.
Okay folks, Rusty here. We’re looking at Prainha over the next couple of weeks. The long-range is promising some real excitement, but we’ve got to be patient. The start is pretty quiet, with a bit of a dry spell before things kick into gear.
The first few days are a write-off for any decent waves. Wednesday and Thursday are mainly small, messy, and not worth paddling out for. Friday afternoon actually brings a spike in size to nearly 5ft from the S, but the wind is howling from the SW at 16 mph, so it’s a choppy mess. That setup looks more interesting for kite surfing than paddle surfing, honestly. We don’t get a real recommendation until late in the week.
Saturday, August 8th, is where it starts to turn. The morning is a bit junky with a 6ft SSE swell (12s period) and some cross-chop, but the afternoon is the real deal. The wind goes completely glassy, and the conditions clean up beautifully for that same 6ft SSE groundswell. This is a solid one for surfers who want clean, easy paddling conditions, though the swell is a bit overhead so it might be a handful for beginners.
Sunday is back to being poor as the wind picks up again, but Monday, August 10th, delivers a gem for the morning. You get a clean, glassy morning with a nice 4ft S swell (11s period). Perfect for a morning session. The water temp here is about what you’d expect for this time of year, so no worries there.
Now, the standouts are coming. Wednesday, August 12th is going to be a cracker for experienced crew. The morning session has a 5ft SSE groundswell with a long 12-second period, and it's clean with a light cross-offshore wind. This is proper, powerful surf. The longer period means better-shaped waves and bigger lulls between sets, perfect for a point break or reef setup. This isn’t a beginner wave at that size.
Then, hold onto your boardies, because Tuesday, August 18th is the big one. The morning brings a solid 8ft S swell. That’s big, expert-only territory. And the wind is offshore from the WNW. This is a serious, powerful swell with a 9-second period. It’s a heavy, expert-only wave for sure. The afternoon has the same size but with a cross-onshore wind, so the morning is the window to go absolutely mental.
To sum it up: the first few days are a waste. Get in the water on Saturday afternoon, August 8th, for a clean one, and lock in Wednesday morning, August 12th, for great quality. The absolute standout, the one to circle on the calendar, is the morning of Tuesday, August 18th, for the big, powerful stuff, but that’s only for the hardcore crew.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Tue night. Warm (max 23°C on Thu morning, min 15°C on Fri afternoon). Winds increasing (calm on Tue night, fresh winds from the SW by Thu night). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 17°C on Sat morning, min 10°C on Mon morning). Wind will be generally light. | ||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | SSE 11 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 11 | SSE 10 | S 9 | S 12 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | S 10 | SSE 11 | S 11 | S 13 | S 11 |
Wave Graph | |||||||||||||||||||
130 | 86 | 85 | 56 | 45 | 30 | 28 | 9 | 372 | 926 | 791 | 793 | 494 | 275 | 545 | 460 | 371 | 556 | 184 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-on | cross-off | cross-off | cross-on | off | cross-off | cross-off | glassy | cross | glassy | cross-off | cross-off | cross-on | glassy | glassy | cross | on |
High Tide | 10:08PM0.35m | 4:22AM0.47m | 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 | |||
Low Tide | 00:52AM0.24m | 7:41AM0.27m | 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 | ||||
— | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | |
— | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | |
mm | 5 | — | 1 | 2 | — | — | 1 | — | — | — | — | 1 | — | — | — | — | 2 | 8 | 8 |
Temp °C | 19 | 20 | 20 | 19 | 23 | 22 | 21 | 17 | 17 | 13 | 17 | 17 | 16 | 13 | 13 | 12 | 11 | 12 | 12 |
Feels °C | 21 | 22 | 21 | 20 | 25 | 22 | 21 | 12 | 11 | 10 | 15 | 19 | 13 | 8 | 9 | 10 | 10 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | SSE 11 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | E 6 | ENE 8 | ENE 8 | ENE 8 | S 12 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | SSE 10 | SSE 11 | S 11 | S 13 | S 11 |
130 | 86 | 85 | 56 | 45 | 22 | 60 | 32 | 23 | 926 | 791 | 793 | 494 | 275 | 324 | 460 | 371 | 556 | 184 | |
Swell 2 Height (m) Direction Period (s) | E 7 | E 7 | E 6 | E 7 | E 6 | SSE 9 | SSE 8 | SSE 8 | SE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 9 |
33 | 32 | 30 | 33 | 22 | 30 | 28 | 6 | 3 | 13 | 24 | 78 | 62 | 25 | 24 | 11 | 11 | 11 | 39 | |
Swell 3 Height (m) Direction Period (s) | ESE 11 | SE 10 | E 10 | SE 15 | SSE 13 | SSE 12 | SSE 11 | SSE 10 | — | — | — | ENE 8 | — | — | SSE 12 | S 10 | — | — | — |
11 | 4 | 2 | 9 | 17 | 14 | 23 | 9 | — | — | — | 55 | — | — | 59 | 18 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 7 | N 4 | SW 5 | S 9 | — | NE 3 | — | SSW 4 | S 7 | S 10 | — | — | — | SSE 5 |
— | — | — | — | — | 40 | 9 | 55 | 372 | — | 2 | — | 17 | 69 | 545 | — | — | — | 52 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 9 | 137 | 0 | 0 | 165 | 3 | 166 | 614 | 0 | 9 | 0 | 78 | 147 | 166 | 0 | 0 | 41 | 5 |
Best forecast wave conditions in Rio Grande Do Sul | |||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||
Header Global | |||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











