
Surf Forecasts:
Prainha surf forecast from 25 Jul 2026:
- Best quality surf: Thursday 30 Jul, 9PM (local time) - 5ft (1.5m), 7s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 9PM (local time) - 5ft (1.5m), 7s period, SSE swell with 228 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 12AM (local time) - 2.5ft (0.8m), 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 12AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.4m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.5m 7s and forecast to arrive on Thursday (Jul 30) at 9PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Tuesday (Jul 28) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Sat 25th Jul) | 2.5ft (0.8m) 9s |
| Best Surf | 9PM (Thu 30th Jul) | 5ft (1.5m) 7s |
| Most Powerful | 9PM (Thu 30th Jul) | 5ft (1.5m) 7s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
G’day, Rusty here. Right, let’s have a look at what’s on the cards for Prainha. The next couple of weeks are a bit of a mixed bag, with a long stretch of small, ordinary surf to start, then a solid run of cleaner, more powerful conditions towards the end.
We start off this Saturday morning, July 25th, with a tiny 3ft SE swell, period around 9 seconds, and the combined energy is weak at 107. The wind is glassy from the west, so the surface is clean, but the waves are just ordinary. The water temperature is about average for this time of year, nothing out of the ordinary.
That quiet spell hangs around. Saturday afternoon gets messy with a NE breeze, and Sunday morning is glassy again but with even smaller 2ft swell. From Sunday afternoon through to the end of the month, it’s a flat spell. Swell drops to 0.7ft to 2ft, the energy is low (values between 16 and 81), and the wind is often cross or cross-onshore, so the surf is poor. There’s a gap of about six days with no real recommendations.
Now, we get a bit of life early in August. Monday morning, August 3rd, the swell picks up to 3ft from the SE, period 8 seconds, and the combined energy hits 177. The wind is offshore from the WSW, making it clean. It’s still not big, but it’s a step up. Tuesday morning, August 4th, is the first real standout. We’ve got a 4ft ESE swell, period 9 seconds, and the energy is moderate at 260. The wind is glassy from the south, promising clean, glassy conditions. The waves are expected to be good.
Wednesday morning, August 5th, is another cracker. The swell holds at 4ft from the ESE, period 10 seconds, and the energy climbs to 301. Glassy conditions from the north again. Nice clean surf on offer.
The standout of the whole outlook is the morning of Thursday, August 6th. The swell bumps up to 5ft from the ESE, period 11 seconds, and the combined energy is strong at 541. The wind is dead calm, glassy, so the surf will be very clean. This is a good one for experienced surfers, as the swell is above 5ft.
Friday morning, August 7th, is similar with 5ft E swell, period 10 seconds, energy at 516, and glassy conditions from the NNE. Then Saturday morning, August 8th, is the pick of the bunch. We’ve got a 6ft E swell, period 10 seconds, and the energy is strong at 650. With calm, glassy winds, this is going to be the best session of the whole period. The swell is getting up there, so it’s one for the more advanced crew.
Sunday morning, August 9th, the swell eases back to 4ft, with a glassy WNW breeze, but it’s a step down from the peak.
So, the best on offer is definitely the mornings of the 6th, 7th, and 8th of August. Thursday the 6th and Saturday the 8th are the true standouts. It’s a long-range forecast for those days, so keep an eye on the charts, but it looks promising. Prainha is an advanced break, and it’s very consistent, so expect a crowd. The optimum swell direction is from the south, and this swell is coming from the ESE, so it’s a bit off the ideal, but the quality and size make up for it.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Mon morning, min 16°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Wed night. Warm (max 27°C on Wed night, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | ||||||||||||||
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 9 | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 7 | E 7 | E 7 | ESE 8 | ESE 8 | E 7 | SE 5 | SE 8 |
Wave Graph | |||||||||||||||||||
99 | 97 | 118 | 115 | 74 | 61 | 45 | 37 | 26 | 26 | 25 | 51 | 43 | 33 | 6 | 6 | 37 | 25 | 75 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | on | glassy | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross | cross-off | cross-on | cross-on | off | cross | cross | cross-off |
High Tide | 11:33PM0.90m | 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 | |||||||
Low Tide | 6:41AM0.35m | 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 | |||||||
— | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | |
— | — | 5:44 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | — |
Temp °C | 17 | 18 | 19 | 18 | 17 | 18 | 18 | 20 | 19 | 19 | 21 | 20 | 18 | 21 | 24 | 27 | 18 | 17 | 16 |
Feels °C | 18 | 17 | 18 | 18 | 16 | 17 | 17 | 21 | 19 | 18 | 21 | 19 | 18 | 21 | 25 | 27 | 17 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 5 | E 7 | E 7 | E 7 | ESE 8 | E 6 | E 7 | E 7 | SE 8 |
99 | 97 | 118 | 115 | 74 | 61 | 45 | 37 | 26 | 26 | 20 | 51 | 43 | 33 | 6 | 22 | 37 | 25 | 75 | |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 7 | E 8 | E 8 | ENE 4 | ENE 4 | E 7 | ENE 5 | ESE 8 | SE 13 | ESE 8 | ESE 8 | SE 11 | ESE 8 | SE 11 | SE 11 | ENE 7 |
18 | 10 | 10 | 10 | 10 | 4 | 6 | 7 | 4 | 8 | 25 | 7 | 13 | 12 | 5 | 6 | 5 | 4 | 16 | |
Swell 3 Height (m) Direction Period (s) | — | — | SSE 14 | SE 15 | SE 13 | SSE 12 | E 7 | E 7 | SE 13 | E 7 | SE 13 | SE 13 | SE 12 | SE 11 | SE 11 | SE 12 | SE 8 | E 8 | E 8 |
— | — | 18 | 33 | 27 | 15 | 4 | 4 | 7 | 4 | 7 | 7 | 6 | 5 | 5 | 6 | 2 | 1 | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | ENE 2 | NE 4 | — | ENE 5 | NE 4 | — | — | — | — | ENE 7 | — | SSE 2 | SE 5 | — |
— | — | — | — | — | 1 | 13 | — | 4 | 23 | — | — | — | — | 36 | — | 1 | 25 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 73 | 0 | 0 | 73 | 4 | 11 | 73 | 4 | 0 | 73 | 0 | 4 | 140 | 52 | 52 | 129 | 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.










