Surf Forecasts:
Prainha surf forecast from 20 Jul 2026:
- Best quality surf: Friday 24 Jul, 12AM (local time) - 4ft (1.2m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Sunday 26 Jul, 6AM (local time) - 4.5ft (1.3m), 11s period, SE swell with 371 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 6PM (local time) - 3ft (0.9m), 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 Monday (Jul 20) at 6PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.1m and 12s. 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 11s and forecast to arrive on Sunday (Jul 26) 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 1.2m 8s period and expected on Tuesday (Jul 21) at 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 20th Jul) | 3ft (0.9m) 8s |
| Best Surf | 12AM (Fri 24th Jul) | 4ft (1.2m) 8s |
| Most Powerful | 6AM (Sun 26th Jul) | 4.5ft (1.3m) 11s |
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 on the cards for Prainha.
We’ve got a bit of a slow start, to be honest. The first few days are looking pretty ordinary. The swell is small, around 3 to 3 feet, and that short period of 8 seconds means the waves are a bit weak and lacking any real punch. The combined energy is low to moderate (103 on Monday morning). The wind is a major issue too, with onshore and cross-offshore directions making things messy. The water is sitting at 66°, which is about average for this time of year, so nothing to worry about there.
The first real standout doesn’t arrive until Sunday the 26th of July. That morning, we finally get some juice. The swell jumps to 4 feet out of the southeast, with a period of 11 seconds – that’s a proper groundswell bringing some real energy (371). The wind is offshore from the southwest at 6 mph, and the description says “expect good surf conditions”. This is your session. The waves will have some shape and power, and the offshore wind will keep the faces clean. Keep in mind, with the swell direction coming from the southeast and the optimum being from the south, it’s a good match for Prainha’s exposed setup. The crowd factor is listed as “sometimes”, so you might have a few out, but it’s not a circus.
Now, after that little burst, the surf drops right back off. The energy drops again and the combined energy figures go back into the low hundreds. We’re looking at a long stretch of small, weak waves from the 27th right through to the beginning of August. The period stays short, mostly in the 7-8 second range, and the wind is often a problem. There’s a little window on the morning of Tuesday the 4th of August, with glassy conditions and a small 3-foot swell, but it’s nothing to write home about.
So, the verdict: Sunday the 26th of July is the clear winner. That’s the one to plan for. The rest of the 16 days is mostly a flat spell with small, weak waves. Don’t be disheartened, though – it tends not to stay poor for long here, and you know how forecasts can change.
Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Wed night. Warm (max 23°C on Mon afternoon, min 17°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 33mm), heaviest during Fri night. Warm (max 22°C on Sat afternoon, min 15°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
AM | 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 8 | E 8 | S 11 | E 8 | E 8 | S 10 | E 8 | E 8 | E 9 | E 8 | SSE 6 | SSE 8 | SE 9 | SE 9 | E 8 | SE 9 | SE 9 | SE 9 | SE 11 | SE 10 | SE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 103 | 105 | 2 | 103 | 78 | 2 | 82 | 107 | 119 | 68 | 51 | 207 | 81 | 79 | 78 | 88 | 91 | 75 | 371 | 313 | 260 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-off | glassy | on | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross-on | off | cross | off | off | off | cross | off |
High Tide | 7:21PM0.93m | 7:41AM0.99m | 8:11PM0.88m | 8:54AM0.93m | 4:18PM0.68m | 9:14PM0.85m | 10:17AM0.93m | 10:25PM0.85m | 11:34AM0.99m | 11:33PM0.90m | 12:35PM1.08m | 00:28AM0.97m | 1:22PM1.16m | 1:14AM1.06m | |||||||
Low Tide | 11:39AM0.36m | 11:46PM0.44m | 12:20PM0.48m | 00:39AM0.47m | 1:13PM0.60m | 1:52AM0.50m | 6:26PM0.63m | 5:56AM0.45m | 7:10PM0.56m | 6:41AM0.35m | 7:43PM0.51m | 7:15AM0.26m | 8:08PM0.46m | ||||||||
 |  |  | | |  |  |  |  | | | | | |  |  |  | | | | | |
 | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — |
 | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — | — | 5:44 | — | — | 5:44 | — |
mm | — | — | — | — | — | — | — | 1 | 5 | — | — | 5 | 5 | 4 | 17 | 1 | 1 | — | — | — | — |
Temp °C | 21 | 23 | 23 | 23 | 23 | 23 | 22 | 19 | 19 | 17 | 17 | 16 | 17 | 17 | 17 | 20 | 22 | 17 | 20 | 20 | 17 |
Feels °C | 20 | 23 | 23 | 23 | 22 | 23 | 20 | 18 | 21 | 15 | 15 | 15 | 18 | 18 | 18 | 22 | 22 | 13 | 19 | 19 | 16 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 8 | E 8 | SSE 5 | SE 9 | E 8 | E 8 | SE 9 | SE 9 | SE 9 | SE 11 | SE 10 | SE 10 |
| kJ | 103 | 105 | 137 | 103 | 78 | 134 | 82 | 107 | 119 | 68 | 50 | 18 | 81 | 63 | 72 | 88 | 91 | 75 | 371 | 313 | 260 |
Swell 2 Height (m) Direction Period (s) | — | S 12 | S 11 | S 11 | S 10 | S 10 | S 9 | S 8 | S 8 | SE 9 | — | E 8 | E 8 | SE 9 | SE 9 | E 8 | E 7 | ENE 7 | ENE 7 | E 7 | E 9 |
| kJ | — | 3 | 2 | 2 | 2 | 2 | 2 | 1 | 12 | 3 | — | 51 | 49 | 79 | 78 | 40 | 27 | 18 | 11 | 4 | 6 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | S 13 | SSE 4 | — | — | SE 9 | — | — | — | — | SE 13 | SE 16 | — | — | — |
| kJ | — | — | — | — | — | — | — | 3 | 1 | — | — | 20 | — | — | — | — | 7 | 10 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSE 4 | N 3 | SSE 4 | SSE 6 | SSE 8 | — | — | — | — | — | SW 3 | — | — | — |
| kJ | — | — | — | — | — | — | — | 10 | 6 | 6 | 51 | 207 | — | — | — | — | — | 2 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 73 | 4 | 0 | 73 | 4 | 0 | 52 | 0 | 126 | 61 | 0 | 0 | 28 | 0 | 4 | 0 | 0 | 0 | 91 | 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.
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