
Surf Forecasts:
Prainha surf forecast from 25 Jul 2026:
- Best quality surf: Saturday 25 Jul, 9PM (local time) - 3ft (0.9m), 9s period, SE swell with glassy winds.
- Most powerful swell: Saturday 25 Jul, 12PM (local time) - 3ft (0.9m), 9s period, SE swell with 118 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 9PM (local time) - 3ft (0.9m), 9s 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 Saturday (Jul 25) at 9PM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.3m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 0.9m 9s and forecast to arrive on Saturday (Jul 25) at 12PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Jul 30) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 25th Jul) | 3ft (0.9m) 9s |
| Best Surf | 9PM (Sat 25th Jul) | 3ft (0.9m) 9s |
| Most Powerful | 12PM (Sat 25th Jul) | 3ft (0.9m) 9s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's talk about what's on the menu for the next couple of weeks.
Right off the bat, we're in a bit of a flat spell. The first few days are looking pretty ordinary, with only small, weak waves on offer. The best bet early on is a quick window on Sunday morning, the 27th of July. We’ve got a tiny 2-foot swell from the ESE, but the real story is the glassy conditions. That Northwest wind at 3 mph is making it dead flat and clean, so for a small-wave board, it could be a fun, uncrowded session. The water temp is sitting at 66°, which is about 1° warmer than average for this time of year, so it's nothing crazy, just a touch on the warm side.
After that, things drop off again. There’s a long stretch of poor surf with very low energy, barely registering on the scale. The swell is tiny and the wind is all over the place. It’s a real lull.
Then, we start to see some life come back into the ocean around the 4th of August. The energy starts to build, and by Wednesday morning, the 5th of August, we might have something worth getting excited about. The swell is picking up to 4 feet from the ESE, with a period of 9 seconds. The energy is climbing into the moderate range, and the wind is a clean cross-offshore from the South at 6 mph. That’s a solid combination for Prainha. It’s an advanced, exposed spot, and it’s very consistent, so it won’t be a secret. Expect some crowds.
The real standout, though, looks like Thursday morning, the 6th of August. The swell holds at 4 feet from the East, but the wind is forecast to be totally glassy. That’s a rare treat. The energy is still solid, and the waves should be clean and well-shaped. For an advanced crew, this is the pick of the window. The 9-second period is a bit short, so it won't have that heavy groundswell punch, but it’ll be fun and punchy enough.
The following weekend into the second week stays a bit inconsistent. There’s a bit of a bump on Sunday the 9th of August, with a 4-foot East swell and clean cross-offshore winds in the morning. It’s promising, but it's a long way out, so treat it as a hopeful possibility rather than a sure thing.
So, to sum it up: the first week is a write-off. Keep your eyes on Thursday the 6th of August for the best chance of a clean, fun session at Prainha. The 5th of August is also a solid option if you don't mind a bit of cross-offshore wind.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Mon morning, min 16°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Wed night. Warm (max 23°C on Wed afternoon, min 17°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
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) | SE 9 | SE 9 | SE 9 | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 | E 6 | E 7 | E 7 | SSE 11 | E 7 | E 7 | SE 10 | SSE 12 | SE 12 | SE 11 |
Wave Graph | |||||||||||||||||||||
97 | 118 | 115 | 74 | 61 | 45 | 46 | 39 | 26 | 25 | 53 | 27 | 33 | 33 | 12 | 37 | 36 | 4 | 14 | 23 | 19 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | glassy | cross-off | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-off | cross | cross-on | cross-off | cross-on | cross | cross | glassy | cross-on | cross-on |
High Tide | 12:35PM1.08m | 00:28AM0.97m | 1:22PM1.16m | 1:14AM1.06m | 2:02PM1.24m | 1:54AM1.15m | 2:38PM1.29m | 2:30AM1.23m | 3:14PM1.32m | 3:06AM1.29m | 3:49PM1.33m | 3:42AM1.32m | 4:25PM1.31m | ||||||||
Low Tide | 7:43PM0.51m | 7:15AM0.26m | 8:08PM0.46m | 7:44AM0.18m | 8:26PM0.43m | 8:09AM0.12m | 8:36PM0.41m | 8:33AM0.06m | 8:47PM0.38m | 8:56AM0.03m | 9:04PM0.36m | 9:22AM0.01m | 9:27PM0.33m | ||||||||
6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | |
— | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 6 | 2 | 1 | 1 | — | — | — |
Temp °C | 18 | 19 | 18 | 17 | 18 | 18 | 20 | 20 | 19 | 22 | 20 | 18 | 21 | 23 | 23 | 17 | 17 | 17 | 18 | 18 | 19 |
Feels °C | 18 | 19 | 19 | 16 | 17 | 17 | 20 | 20 | 18 | 23 | 19 | 18 | 22 | 24 | 23 | 17 | 18 | 18 | 20 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 5 | E 7 | E 6 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 |
97 | 118 | 115 | 74 | 61 | 45 | 46 | 39 | 26 | 13 | 53 | 27 | 33 | 33 | 22 | 37 | 36 | 24 | 16 | 16 | 16 | |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | NE 4 | NE 4 | ENE 4 | ENE 4 | ESE 8 | SE 13 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SE 4 | SSE 4 | SSE 4 | SE 8 | SE 8 | SE 8 |
10 | 10 | 10 | 10 | 4 | 3 | 4 | 4 | 8 | 25 | 7 | 12 | 6 | 6 | 6 | 4 | 2 | 1 | 10 | 9 | 9 | |
Swell 3 Height (m) Direction Period (s) | — | SSE 14 | SE 15 | SE 13 | SSE 12 | E 7 | E 7 | E 7 | E 7 | SE 14 | SE 13 | SE 12 | SE 14 | SE 13 | — | SE 10 | SE 11 | SE 10 | SSE 12 | SE 12 | SE 11 |
— | 18 | 33 | 27 | 15 | 4 | 4 | 4 | 4 | 7 | 7 | 6 | 8 | 6 | — | 4 | 5 | 4 | 14 | 23 | 19 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NE 4 | — | NE 4 | NE 4 | — | ENE 6 | — | — | — | SSE 11 | — | SSE 4 | — | — | — | ENE 3 |
— | — | — | — | — | 11 | — | 5 | 16 | — | 31 | — | — | — | 12 | — | 6 | — | — | — | 4 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 128 | 0 | 0 | 73 | 4 | 0 | 73 | 4 | 11 | 73 | 11 | 11 | 140 | 126 | 52 | 126 | 61 | 11 | 33 | 40 |
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.










