Surf Forecasts:
Prainha surf forecast from 27 Jul 2026:
- Best quality surf: Monday 27 Jul, 9AM (local time) - 2ft (0.6m), 8s period, ESE swell with glassy winds.
- Most powerful swell: Monday 3 Aug, 3AM (local time) - 2.5ft (0.8m), 8s period, E swell with 76 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 9AM (local time) - 2ft (0.6m), 8s period with ESE 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 27) at 9AM. The primary swell is predicted to be 0.6m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 0.8m 8s and forecast to arrive on Monday (Aug 03) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Tuesday (Jul 28) at 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 27th Jul) | 2ft (0.6m) 8s |
| Best Surf | 9AM (Mon 27th Jul) | 2ft (0.6m) 8s |
| Most Powerful | 3AM (Mon 3rd Aug) | 2.5ft (0.8m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break it down in feet for those who think that way.
Prainha is looking like a 16-day stretch where patience pays off. The first week is mostly small, weak surf with okay conditions if you’re lucky – but nothing to get excited about.
Starting Monday the 27th of July, we’ve got a 2ft ESE swell with a short 8-second interval. The energy is low, around 50 (combined energy). Monday morning is glassy with a light west wind, making it surfable but very ordinary. You’ll get a few little rides. By afternoon, the wind turns onshore from the NE at 10 km/h and it gets poor.
Tuesday the 28th is a dud. Swell drops to 1ft and the wind is messy. Don’t bother.
Wednesday the 29th: morning shows some hope with light SSW cross-offshore wind cleaning up a 2ft E swell. Still weak, but clean. Afternoon turns poor again.
Thursday the 30th: morning is glassy again with a light west wind, and the afternoon sees a longer 12-second period SSE swell at 1ft. Energy hits 101 – that’s moderate power for such a small wave. If you want a glassy session, the afternoon looks surfable.
Friday the 31st through Sunday the 2nd of August: tiny glassy mornings but the swell stays under 3ft and energy stays below 60. Not worth rushing.
Now, here comes the real window. Wednesday the 5th of August morning: a 3ft SE swell with a 10-second period brings energy up to 212. That’s strong power. Wind is light and cross from the north, making it fairly clean. It’s listed as “marginal” due to tide or conditions, but it’s the first real pulse.
Thursday the 6th of August morning is the standout. Clean cross-offshore wind from the NW at 10 km/h, 3ft SE groundswell, 10-second period, and a combined energy of 242. The report says “expect good surf conditions.” That’s the session. Go early.
Friday the 7th of August: a very long period 13-second SE swell at 2ft with strong offshore wind from the WSW at 12 mph. Clean and punchy for the size, but that long period might make it close out a bit. For advanced surfers, it’ll be fun.
From Saturday the 8th onward, it fades fast. By Sunday the 9th, swell drops to 0.7ft and energy is down to 13. Monday the 10th and Tuesday the 11th are basically flat – combined energy down to single digits. That’s the end of the run.
Best bet: Thursday morning, August 6th. That’s the one. Clean, real waves, and proper power. Set the alarm.
Keep the wax warm,
Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Wed afternoon, min 18°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Very mild (max 19°C on Fri night, min 16°C on Thu morning). Wind will be generally light. | ||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ENE 6 | ESE 8 | E 7 | SSE 12 | SSE 4 | E 7 | E 7 | SE 10 | SE 9 | E 7 | SE 8 | E 6 | E 6 | E 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 45 | 46 | 45 | 26 | 25 | 40 | 12 | 32 | 47 | 12 | 37 | 47 | 24 | 23 | 22 | 9 | 25 | 36 | 39 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | on | cross-on | cross | cross-on | cross-off | cross-off | on | cross | glassy | glassy | glassy | glassy | on | cross-on | glassy | on | glassy |
High Tide | 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 | 4:20AM1.32m | 5:03PM1.27m | |||||||
Low Tide | 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 | 9:51AM0.03m | 9:56PM0.33m | |||||||
 |  | | | | | |  | |  |  | |  | | | | | |  | |
 | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — |
 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — |
mm | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 18 | 20 | 20 | 19 | 21 | 22 | 20 | 23 | 24 | 17 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 19 | 19 |
Feels °C | 17 | 20 | 20 | 18 | 22 | 22 | 20 | 23 | 25 | 13 | 18 | 19 | 18 | 19 | 18 | 20 | 20 | 19 | 21 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 5 | E 6 | ENE 6 | E 7 | SE 12 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | E 5 | E 6 | E 6 | E 6 |
| kJ | 45 | 46 | 45 | 26 | 14 | 24 | 29 | 32 | 6 | 24 | 37 | 47 | 23 | 23 | 22 | 14 | 25 | 36 | 39 |
Swell 2 Height (m) Direction Period (s) | NE 3 | NE 4 | E 7 | ENE 4 | ESE 8 | SE 8 | ESE 8 | ESE 8 | SSE 12 | SE 11 | SSE 5 | SSE 9 | SE 10 | SE 9 | SE 8 | SE 8 | SE 8 | SE 11 | S 11 |
| kJ | 3 | 4 | 4 | 6 | 25 | 16 | 12 | 12 | 47 | 5 | 10 | 8 | 24 | 19 | 17 | 9 | 2 | 4 | 2 |
Swell 3 Height (m) Direction Period (s) | E 8 | E 7 | SE 13 | E 7 | SE 13 | SE 13 | SE 12 | SE 13 | SE 8 | SE 8 | SSE 12 | SE 11 | SE 15 | SE 13 | SE 12 | SE 11 | SE 11 | SE 7 | SE 7 |
| kJ | 4 | 4 | 7 | 1 | 7 | 7 | 6 | 7 | 15 | 2 | 13 | 5 | 8 | 7 | 6 | 5 | 5 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | NE 4 | — | ENE 4 | NE 4 | — | ENE 6 | — | — | E 7 | SSE 4 | SSE 5 | — | — | — | — | NE 4 | — | — | — |
| kJ | 6 | — | 3 | 16 | — | 40 | — | — | 33 | 12 | 27 | — | — | — | — | 6 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 0 | 73 | 28 | 11 | 54 | 52 | 0 | 52 | 61 | 0 | 0 | 0 | 11 | 73 | 52 | 61 | 73 | 11 |
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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