
Surf Forecasts:
Prainha surf forecast from 16 Jul 2026:
- Best quality surf: Friday 17 Jul, 3AM (local time) - 2.5ft (0.8m), 7s period, E swell with cross-offshore winds.
- Most powerful swell: Saturday 18 Jul, 6PM (local time) - 3.5ft (1.1m), 9s period, E swell with 181 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 3AM (local time) - 2.5ft (0.8m), 7s 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 Friday (Jul 17) at 3AM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.5m and 11s. 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 1.1m 9s and forecast to arrive on Saturday (Jul 18) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Sunday (Jul 19) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Fri 17th Jul) | 2.5ft (0.8m) 7s |
| Best Surf | 3AM (Fri 17th Jul) | 2.5ft (0.8m) 7s |
| Most Powerful | 6PM (Sat 18th Jul) | 3.5ft (1.1m) 9s |
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 Prainha has got cookin' for us over the next couple of weeks. It's a bit of a slow burn to start, but hang in there.
Right off the bat, the water is sitting at 63°, which is about a degree and a half colder than we'd normally expect for this time of year—a little nippy, so you might want that extra rashie or a thin suit.
We kick things off on Thursday, the 16th of July. It's small, with some weak 3ft swell from the ESE, but the wind is on it and the quality is poor. Honestly, not worth paddling out.
Friday the 17th offers a moment of calm in the morning. The swell is still a modest 3ft from the East, but the wind goes glassy—dead calm, offshore from the WNW. It'll be clean, but the waves are very ordinary. It's surfable if you're desperate for a splash, but don't expect any fireworks.
Saturday and Sunday through to about Wednesday the 22nd are pretty flat and messy. The swell stays under 3ft, the period is short (8 seconds), and the winds are mostly onshore or cross-shore. There are a few glassy windows—like Sunday morning the 19th and Tuesday morning the 21st—where you might score a clean but weak wave. The energy is low, reading between 107 and 139, so it's a real knee-paddler's playground.
Now, if you've got patience, there is a proper standout on the horizon. Friday, the 24th of July, in the afternoon is the one to circle on the calendar. The swell jumps to a solid 6ft from the SSE, and even though the period is still a short 8 seconds, the combined energy spikes hard to 569—that's some serious juice in the water for Prainha. The wind is blowing cross-off from the South, which should keep things pretty clean. This is definitely a session for the advanced crew, as that size will be pushing it for beginners. It's rated as "very consistent" here, so you can expect waves to roll through, but be ready for a crowd—this spot does get busy.
The next day, Saturday the 25th of July, is still a great call. The swell drops back to 3ft from the SE, but look at that period—13 seconds! That's proper groundswell energy. The wind goes light offshore and even glassy in the afternoon (254 and 247 energy). This is a classic, clean Prainha day. It won't be as big as Friday, but the quality will be much better. Keep in mind that a long-period swell like this can be a bit straight at a beach break, but with these conditions, it'll still be fun.
After that, things quieten down again. The last week of July into the 31st sees tiny swell, with energy readings dropping below 100 for most of it. There are a few mornings with clean conditions (like the 30th and 31st), but the wave height is barely 2ft. It's not going to be a memorable end to the month.
So, your best bets are Friday afternoon the 24th for a punchy, larger session, and Saturday the 25th for the cleanest, most polished waves of the outlook.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Sat afternoon, min 14°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Tue afternoon, min 16°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||
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) | ESE 10 | ESE 10 | E 8 | E 8 | E 8 | E 8 | E 8 | SE 10 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | S 11 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 |
Wave Graph | ||||||||||||||||||||
173 | 73 | 94 | 107 | 165 | 153 | 140 | 4 | 117 | 0 | 177 | 133 | 0 | 2 | 105 | 84 | 66 | 49 | 49 | 46 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross | glassy | cross-on | cross | cross | on | cross | glassy | cross-on | glassy | cross | on | cross | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off |
High Tide | 4:49PM1.23m | 4:28AM1.21m | 5:26PM1.15m | 5:07AM1.19m | 6:03PM1.07m | 5:50AM1.14m | 6:40PM1.00m | 6:40AM1.07m | 7:21PM0.93m | 7:41AM0.99m | 8:11PM0.88m | 8:54AM0.93m | 4:18PM0.68m | 9:14PM0.85m | ||||||
Low Tide | 9:24PM0.54m | 9:56AM0.09m | 9:50PM0.50m | 10:28AM0.16m | 10:24PM0.46m | 11:02AM0.25m | 11:02PM0.44m | 11:39AM0.36m | 11:46PM0.44m | 12:20PM0.48m | 00:39AM0.47m | 1:13PM0.60m | 1:52AM0.50m | |||||||
— | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | |
5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 16 | 19 | 19 | 20 | 24 | 23 | 19 | 22 | 22 | 22 | 23 | 24 | 24 | 25 | 24 | 16 | 16 | 17 |
Feels °C | 15 | 17 | 15 | 19 | 19 | 18 | 23 | 22 | 19 | 22 | 22 | 21 | 24 | 24 | 23 | 24 | 23 | 16 | 16 | 18 |
Swell 1 Height (m) Direction Period (s) | ESE 10 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | ENE 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | SE 6 | E 8 | E 8 |
173 | 66 | 94 | 107 | 165 | 153 | 140 | 171 | 117 | 104 | 177 | 133 | 109 | 137 | 105 | 84 | 66 | 24 | 49 | 46 | |
Swell 2 Height (m) Direction Period (s) | ENE 7 | ESE 10 | ESE 11 | ESE 11 | ESE 10 | SE 10 | SE 10 | SE 10 | S 15 | — | S 12 | — | — | S 11 | S 11 | — | — | E 8 | SE 5 | SSE 5 |
73 | 73 | 45 | 44 | 20 | 4 | 4 | 4 | 4 | — | 3 | — | — | 2 | 2 | — | — | 49 | 9 | 2 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 14 | — | — | — | — | — | — | — | — | — | SSE 9 | SSE 10 |
— | — | — | — | — | — | — | — | 8 | — | — | — | — | — | — | — | — | — | 8 | 11 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | ENE 8 | — | — | ENE 8 | — | ENE 8 | — | — | — | — | — | — | SSE 5 | — | — | — |
— | — | — | — | 352 | — | — | 434 | — | 243 | — | — | — | — | — | — | 29 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 73 | 4 | 0 | 73 | 4 | 4 | 59 | 4 | 0 | 73 | 0 | 4 | 59 | 4 | 0 | 40 | 129 | 0 | 52 | 0 |
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.










