
Surf Forecasts:
Prainha surf forecast from 4 Aug 2026:
- Best quality surf: Saturday 8 Aug, 3AM (local time) - 4ft (1.2m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Saturday 8 Aug, 6AM (local time) - 4.5ft (1.3m), 8s period, E swell with 228 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 3AM (local time) - 1.5ft (0.4m), 11s period with SE 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 3AM. The primary swell is predicted to be 0.4m and 11s 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 1.3m 8s and forecast to arrive on Saturday (Aug 08) at 6AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 8s period and expected on Saturday (Aug 08) at 3PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 5th Aug) | 1.5ft (0.4m) 11s |
| Best Surf | 3AM (Sat 8th Aug) | 4ft (1.2m) 8s |
| Most Powerful | 6AM (Sat 8th Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, surf’s up, or at least it’s trying to be. Let’s get into it.
The next couple of weeks are looking pretty quiet for Prainha. We’ve got a lot of small, weak swells and plenty of onshore or cross-onshore winds messing things up. The water is sitting at a touch warmer than normal for this time of year, which is a small comfort while you’re staring at ankle-biters.
Monday afternoon kicks things off, and honestly, it’s a write-off. We’re looking at a tiny 2ft of east swell with a period of 7 seconds – that’s just wind slop. The cross-on breeze from the NE at 6 mph isn't doing it any favors either. The swell energy is weak, only 45, so don’t even bother waxing up.
Tuesday morning, the wind drops to glassy, which is a bonus, but the swell is still tiny at 1.6ft and the period hasn’t improved. It’s pretty, but flat. The afternoon brings a little more period, 12 seconds from the southeast, but the height drops to 1.3ft. It’s an optical illusion; there’s nothing to ride.
We get a bit of a ripple on Wednesday morning. The swell bumps up to 2ft, but the period is still a dismal 7 seconds. It’s clean with light airs, so if you’re desperate for a knee-high slide, it’s there. But “surfable” is the technical term, and I’d use that loosely. The afternoon gets worse with an onshore breeze chopping up what little is there.
Thursday morning is glassy again, and the swell is up to 2.3ft from the east at 8 seconds. It’s surfable, very ordinary is the call. The energy is still weak, 85. The afternoon is a no-go with the cross-onshore wind.
Friday morning is the first time we see a sniff of something better. The swell hits 3ft, and the wind is a clean cross-off from the WNW. The energy ticks up to 101, which is at least moderate. It’s still small, but there might be a few fun ones if you’re on a log. The rain showers are a bit of a downer, but the surf quality should be okay. Friday afternoon, forget it, the wind swings onshore.
Now, Saturday the 8th is our first real standout window of the whole period. The morning brings the swell up to a whole 3.3ft from the east, but the period is still 8 seconds. However, the wind is a light cross-off from the SSW, and the wave comment calls for “expect good surf conditions.” The energy spikes to 250, which is a solid bump from the weak stuff we’ve been seeing. This is the best it’s going to get for a while, make the most of the clean conditions. The afternoon is a total letdown though, as the swell crashes down to 1.3ft with a long 15-second period and a cross-shore wind. All that energy just gone.
Sunday the 9th turns to junk. The wind picks up to 12 mph from the south, and while it’s cross-off in the morning, the swell has dropped back down to 1.3ft. The energy is back down to 138. By afternoon, it’s even worse, with the swell dropping to a 6-second period and the wind going cross-shore. It’s a mess.
Monday the 10th and Tuesday the 11th are a write-off. The wind is howling from the south at 12 mph, and the swell is weak, inconsistent, and riddled with cross-chop. Not worth your time.
We get another pulse of energy mid-week on Wednesday the 12th. The swell pushes up to 3.9ft in the morning and 4.3ft in the afternoon from the east, but the period is a dismal 6 seconds. The energy jumps up to 206 and 230, which is moderate, but that short-period windswell combined with the onshore wind is going to be a messy, closed-out shorebreak. It's bigger, but not better. This is more of a novelty for the bodyboarders, or perhaps you want to get the kite out, because it looks dicey for a paddle.
Thursday the 13th, the swell drops back down, but the morning is clean with a light offshore wind. Still, it’s only 3ft, so nothing special.
Now, Friday the 14th is our second standout. The swell jumps to 4.3ft from the SSE, and while the period is still short at 6 seconds, the energy is solid at 264. With a light cross-off wind from the SSW in the morning, this looks like the most powerful, cleanest surf of the entire window. It’s still a bit of a closeout risk with that short period, but for Prainha, this is as good as it's going to get. The afternoon brings more onshore
Short Range ForecastMostly dry. Warm (max 22°C on Thu morning, min 18°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Fri night. Warm (max 26°C on Thu night, min 14°C on Sun morning). Winds increasing (calm on Sat morning, fresh winds from the SSE by Sat night). | |||||||||||||||||||
Mon 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
PM | 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) | E 7 | E 7 | SE 12 | SE 12 | SE 12 | E 7 | E 7 | E 7 | E 8 | E 8 | SE 12 | E 8 | E 8 | E 8 | E 8 | SE 15 | SE 17 | SE 14 | SSE 6 | SE 13 |
Wave Graph | ||||||||||||||||||||
37 | 25 | 23 | 37 | 49 | 34 | 33 | 36 | 61 | 63 | 6 | 93 | 72 | 84 | 133 | 84 | 106 | 71 | 55 | 27 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | on | cross | glassy | on | cross-on | glassy | cross-on | cross-on | cross-off | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | cross |
High Tide | 6:29PM1.10m | 6:39AM1.12m | 7:21PM0.99m | 7:46AM1.04m | 8:25PM0.89m | 9:09AM1.00m | 3:15PM0.66m | 9:42PM0.83m | 3:54AM0.57m | 10:59PM0.84m | 12:00PM1.14m | 00:04AM0.91m | 1:02PM1.25m | 00:55AM1.01m | ||||||
Low Tide | 11:05PM0.37m | 11:36AM0.30m | 11:46PM0.41m | 12:22PM0.46m | 00:35AM0.47m | 1:24PM0.63m | 1:45AM0.53m | 5:51AM0.53m | 7:02PM0.49m | 6:42AM0.39m | 7:49PM0.43m | 7:22AM0.26m | 8:27PM0.42m | |||||||
— | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | |
5:47 | — | — | 5:47 | — | — | 5:49 | — | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 5 | 10 | 1 | 2 | 5 | 6 | 3 | — |
Temp °C | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 22 | 23 | 26 | 20 | 19 | 17 | 17 | 18 | 19 | 16 | 15 | 15 |
Feels °C | 19 | 19 | 21 | 21 | 21 | 20 | 20 | 20 | 21 | 23 | 25 | 22 | 20 | 17 | 18 | 19 | 21 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | SE 5 |
37 | 25 | 23 | 23 | 32 | 34 | 33 | 36 | 61 | 63 | 83 | 93 | 72 | 84 | 133 | 112 | 84 | 31 | 31 | 25 | |
Swell 2 Height (m) Direction Period (s) | SE 12 | ESE 12 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 9 | SE 9 | SE 8 | SE 8 | SE 9 | SE 18 | SE 15 | SE 17 | SE 14 | — | E 9 |
6 | 13 | 21 | 37 | 49 | 19 | 18 | 16 | 15 | 14 | 3 | 3 | 3 | 3 | 117 | 84 | 106 | 71 | — | 39 | |
Swell 3 Height (m) Direction Period (s) | E 10 | S 13 | S 12 | SE 10 | ESE 10 | S 6 | E 11 | — | SE 15 | SE 14 | SE 12 | SE 11 | SSE 8 | — | — | — | — | E 15 | — | SE 13 |
2 | 3 | 3 | 27 | 9 | 1 | 2 | — | 9 | 7 | 6 | 5 | 6 | — | — | — | — | 4 | — | 27 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SSW 3 | — | SE 4 | ENE 8 | ENE 8 | — | SSE 6 | SSE 6 | SSE 6 |
— | — | — | — | — | — | — | — | — | — | — | 1 | — | 5 | 202 | 211 | — | 63 | 55 | 74 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 178 | 40 | 11 | 73 | 4 | 0 | 73 | 4 | 0 | 73 | 4 | 0 | 52 | 0 | 0 | 33 | 0 | 80 | 129 | 61 |
Best forecast wave conditions in Santa Catarina - Norte | ||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||
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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.











