Surf Forecasts:
Prainha surf forecast from 19 Jul 2026:
- Best quality surf: Friday 24 Jul, 3AM (local time) - 4.5ft (1.4m), 9s period, SSE swell with cross-offshore winds.
- Most powerful swell: Friday 24 Jul, 6AM (local time) - 5ft (1.5m), 9s period, SSE swell with 352 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 3AM (local time) - 3.5ft (1.1m), 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 3AM. The primary swell is predicted to be 1.1m 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 1.5m 9s and forecast to arrive on Friday (Jul 24) at 6AM. Winds are predicted to be cross-offshore 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 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 20th Jul) | 3.5ft (1.1m) 8s |
| Best Surf | 3AM (Fri 24th Jul) | 4.5ft (1.4m) 9s |
| Most Powerful | 6AM (Fri 24th Jul) | 5ft (1.5m) 9s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here again, breaking it down in feet for those who think in yards.
Don't get too excited for the first few days. Saturday the 18th is a total dud with ankle-biters and a messy cross-on breeze. Sunday the 19th shows a bit of waist-high potential but the period is short and the wind is all over the shop. You’re not surfing anything decent until Monday the 20th morning.
That morning, Monday the 20th, is the real standout. The wind goes glassy – dead flat calm, perfect. The swell is a clean 3ft from the east with a short 8-second period, but combined wave energy is moderate (130). For an advanced wave like Prainha, that glassy, clean surface will make the small stuff feel a lot more fun.
Then it settles into a long run of small conditions. Tuesday the 21st morning has about 3ft from the east with light offshore wind (WSW), giving you clean lines. Wednesday the 22nd, Thursday the 23rd, and Friday the 24th all offer small, ordinary surf – mostly under 3ft with cross-off winds keeping them rideable. Water temp is around 64°F, about average for the season.
There’s a real dead stretch mid-period. Saturday the 26th morning is glassy and small at 2ft, but by the afternoon the wind turns onshore and messes it up. Sunday the 27th through Tuesday the 29th mornings are mostly poor – weak, short-period junk and onshore/cross-onshore winds. That’s a solid four-day gap with nothing worth chasing.
Coming into the second week, Wednesday the 29th of July morning brings another brief highlight. Glassy conditions again with a clean 3ft east swell and moderate energy (119). It’s not big, but with zero wind, every wave will be a clean little open face.
From Thursday the 30th through Sunday the 2nd of August, it’s a long run of ankle-to-waist high surf with mostly clean conditions. Swell stays from the east and while it’s small, the consistency is there. You won’t be getting barreled, but you won’t be totally skunked either.
Best bet: Monday the 20th morning for that glassy start and a solid 3ft. Wednesday the 29th morning is the other call – also glassy, a little smaller, but still worth the session.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 18°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 37mm), heaviest during Wed night. Very mild (max 19°C on Wed morning, min 15°C on Fri morning). Wind will be generally light. | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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 10 | SE 10 | E 8 | S 13 | ENE 8 | E 8 | S 12 | S 11 | E 8 | S 11 | S 10 | E 8 | E 8 | E 8 | SE 9 | E 8 | SE 9 | SE 9 | SE 9 | SE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 4 | 4 | 93 | 3 | 0 | 127 | 3 | 2 | 105 | 2 | 2 | 66 | 84 | 90 | 22 | 90 | 52 | 112 | 112 | 76 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | on | cross | glassy | on | cross | off | cross | cross-off | cross-off | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 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 | 10:17AM0.93m | 10:25PM0.85m | 11:34AM0.99m | 11:33PM0.90m | ||||||
Low Tide | 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 | 6:26PM0.63m | 5:56AM0.45m | 7:10PM0.56m | ||||||||
 |  | | | |  | | | | |  |  |  |  | |  | | | |  | |
 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — |
 | 5:39 | — | — | 5:40 | — | — | 5:40 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 10 | 24 | 2 | — | — | — | — | — |
Temp °C | 26 | 24 | 20 | 23 | 20 | 22 | 22 | 22 | 22 | 18 | 18 | 19 | 19 | 19 | 17 | 18 | 17 | 16 | 17 | 17 |
Feels °C | 23 | 22 | 18 | 22 | 17 | 21 | 23 | 22 | 21 | 15 | 19 | 19 | 19 | 19 | 14 | 17 | 15 | 15 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | E 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | SE 9 | SE 9 | SE 9 |
| kJ | 147 | 115 | 93 | 96 | 202 | 127 | 134 | 140 | 105 | 87 | 92 | 66 | 84 | 90 | 94 | 90 | 52 | 112 | 112 | 76 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SE 10 | E 9 | S 13 | — | S 12 | S 12 | S 11 | S 11 | S 11 | S 10 | SE 4 | SE 9 | SSE 10 | SE 9 | SE 9 | SE 9 | E 8 | E 8 | E 8 |
| kJ | 4 | 4 | 2 | 3 | — | 3 | 3 | 2 | 2 | 2 | 2 | 3 | 3 | 9 | 22 | 21 | 52 | 36 | 35 | 33 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | S 9 | — | — | — | — | — | — | — | S 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | 8 |
Wind waves Height (m) Direction Period (s) | ENE 8 | — | — | ENE 8 | — | — | — | — | — | — | — | S 4 | — | — | — | SSE 2 | SSE 5 | — | — | — |
| kJ | 313 | — | — | 181 | — | — | — | — | — | — | — | 14 | — | — | — | 1 | 8 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 40 | 4 | 4 | 77 | 4 | 0 | 73 | 4 | 0 | 128 | 11 | 0 | 4 | 28 | 62 | 61 | 11 | 0 | 0 | 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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