Surf Forecasts:
Prainha surf forecast from 8 Aug 2026:
- Best quality surf: Saturday 8 Aug, 9PM (local time) - 1.5ft (0.5m), 15s period, SE swell with glassy winds.
- Most powerful swell: Monday 10 Aug, 6AM (local time) - 4ft (1.2m), 13s period, SE swell with 473 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 9PM (local time) - 1.5ft (0.5m), 15s 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 (Aug 08) at 9PM. The primary swell is predicted to be 0.5m and 15s period with a secondary swell of 0.7m and 5s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.2m 13s and forecast to arrive on Monday (Aug 10) at 6AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 08) at 6PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sat 8th Aug) | 1.5ft (0.5m) 15s |
| Best Surf | 9PM (Sat 8th Aug) | 1.5ft (0.5m) 15s |
| Most Powerful | 6AM (Mon 10th Aug) | 4ft (1.2m) 13s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s cooking over the next couple of weeks at Prainha.
Honestly, it’s a tough start. The first ten days or so are a real mixed bag with very little to get excited about. The water is running a touch warmer than normal at 68°, but that’s about the only bright spot early on. We’ve got a lot of small, weak, and messy swells coming in from the southeast, with wind directions all over the shop – mostly cross or cross-on – and the wave energy is weak to moderate (often under 200). For an advanced spot like Prainha, it’s mostly a write-off. There is a small window around Tuesday the 11th and Wednesday the 12th with light offshore winds from the southwest and some clean conditions, but the swell is tiny at 2 ft to 2 ft and the energy is still only moderate (115-150). It’s surfable but very ordinary – not worth rushing out for.
The real standout, and the one you should circle on your calendar, kicks off on Tuesday the 18th of August. We finally get a proper pulse of east swell pushing up to 5 ft. The combined wave energy jumps into the strong range (487-618). The wind on Tuesday morning is light from the southwest, giving us clean, cross-off conditions. But Wednesday the 19th is the gem – clear skies, a gentle offshore breeze from the WSW, and clean, lined-up waves. That 5 ft east swell with a 9-second period will have some push and shape. For an advanced break like this, that’s the pick of the period. Keep in mind, at this size, it’s getting into expert territory, especially with the energy level. Thursday the 20th morning also looks fun with glassy conditions and a drop to 3 ft, but the real power is on Wednesday.
After that, things taper off again into the last weekend of the month with smaller, weaker swells and a return of less favourable winds. The second week is much quieter, so make the most of that mid-week window. Crowds are possible here, so get in early.
That’s the story. The best waves are over a week away, but they look worth the wait.
Rusty.
Short Range ForecastHeavy rain (total 20mm), heaviest during Sat night. Very mild (max 19°C on Sat afternoon, min 13°C on Mon morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Tue afternoon. Very mild (max 19°C on Thu night, min 13°C on Tue afternoon). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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 14 | SE 16 | SE 14 | SE 14 | SE 5 | SE 5 | SE 5 | SE 6 | SE 13 | SE 13 | SE 12 | SE 12 | SE 13 | SE 12 | SE 12 | SE 12 | SE 15 | SE 14 | SE 12 | SE 15 | SE 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 49 | 88 | 93 | 70 | 42 | 58 | 72 | 61 | 60 | 78 | 122 | 120 | 130 | 120 | 71 | 68 | 149 | 127 | 54 | 174 | 108 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | off | cross | cross | cross | cross | cross-off | cross | off | cross-off | off | off | off | glassy | cross | cross-on | cross-on | cross | cross | cross |
High Tide | 12:00PM1.14m | 00:04AM0.91m | 1:02PM1.25m | 00:55AM1.01m | 1:50PM1.33m | 1:38AM1.12m | 2:31PM1.37m | 2:16AM1.22m | 3:08PM1.36m | 2:52AM1.29m | 3:42PM1.32m | 3:27AM1.33m | 4:14PM1.26m | ||||||||
Low Tide | 7:49PM0.43m | 7:22AM0.26m | 8:27PM0.42m | 7:54AM0.15m | 8:56PM0.43m | 8:20AM0.06m | 9:12PM0.47m | 8:37AM0.01m | 8:59PM0.49m | 8:52AM-0.00m | 8:49PM0.45m | 9:11AM0.02m | 9:04PM0.38m | ||||||||
 |  |  |  | |  | |  |  | | | | | |  | | | | | | | |
 | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | 6 | 4 | 4 | 4 | 2 | — | — | — | 1 | — | — | — | — | — | — | 1 | — | 4 | 4 |
Temp °C | 18 | 19 | 19 | 16 | 15 | 15 | 14 | 14 | 15 | 14 | 13 | 14 | 15 | 16 | 17 | 18 | 18 | 19 | 17 | 17 | 17 |
Feels °C | 17 | 20 | 21 | 14 | 12 | 12 | 9 | 10 | 12 | 12 | 11 | 13 | 14 | 17 | 19 | 19 | 19 | 20 | 15 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | E 8 | SE 16 | E 5 | E 6 | E 6 | E 7 | E 7 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 13 | SE 12 | E 5 | E 6 | E 6 | E 6 | E 6 | SE 15 | SE 13 |
| kJ | 43 | 88 | 19 | 29 | 30 | 14 | 15 | 60 | 60 | 78 | 122 | 120 | 130 | 120 | 20 | 32 | 35 | 28 | 20 | 174 | 108 |
Swell 2 Height (m) Direction Period (s) | SE 5 | ENE 8 | SE 14 | SE 14 | SE 9 | E 13 | — | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | E 5 | SE 12 | SE 12 | SE 15 | SE 14 | SE 12 | E 6 | E 6 |
| kJ | 11 | 19 | 93 | 70 | 20 | 3 | — | 19 | 18 | 28 | 28 | 17 | 9 | 11 | 71 | 68 | 149 | 127 | 54 | 20 | 18 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SE 5 | ENE 7 | — | SE 13 | — | — | — | — | SSE 5 | — | — | — | E 7 | — | SE 16 | — | — | SE 16 | SE 8 | SE 7 |
| kJ | 49 | 4 | 11 | — | 27 | — | — | — | — | 9 | — | — | — | 4 | — | 41 | — | — | 43 | 16 | 12 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 4 | — | SSE 5 | SE 5 | SE 5 | SE 5 | SE 6 | SE 5 | — | — | — | — | — | ENE 6 | — | — | — | — | — | SSE 7 |
| kJ | 85 | 16 | — | 33 | 42 | 58 | 72 | 61 | 25 | — | — | — | — | — | 43 | — | — | — | — | — | 30 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 4 | 0 | 129 | 126 | 121 | 129 | 61 | 52 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 62 | 4 | 62 | 61 | 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.
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