Surf Forecasts:
Prainha surf forecast from 13 Jul 2026:
- Best quality surf: Monday 13 Jul, 3AM (local time) - 6ft (1.8m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 6AM (local time) - 5.5ft (1.7m), 9s period, SSE swell with 423 kJ wave energy.
- Next surfable swell (1★+): Monday 13 Jul, 3AM (local time) - 6ft (1.8m), 8s period with SSE 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 13) at 3AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.9m and 9s. Another secondary swell of 0.6m and 12s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.7m 9s and forecast to arrive on Monday (Jul 13) 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 Saturday (Jul 18) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 13th Jul) | 6ft (1.8m) 8s |
| Best Surf | 3AM (Mon 13th Jul) | 6ft (1.8m) 8s |
| Most Powerful | 6AM (Mon 13th Jul) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Prainha over the next 16 days.
Righto, grab a coffee and listen up. Rusty here. We’ve got a 16-day window for Prainha, and it’s a proper mixed bag of a forecast. The pattern starts with a bit of a tease, then a few clean windows, and then a flare-up of energy right at the end that’s worth keeping an eye on.
The first few days are a slow starter. Monday the 13th has a bit of a 3ft swell from the SE, but that cross-off wind isn't doing it any favours. It’s surfable, but the energy is only moderate (322). Tuesday morning the 14th is a better look with the same 3ft SE swell, a light breeze, and some clean conditions. The energy is a notch up (201), and it’s a solid, cruisy session, but not a standout.
The real sweet spot comes on Wednesday the 15th and Thursday the 16th. Wednesday morning is glassy – dead flat calm from the NNW – with a 4ft ESE swell. The energy is moderate (255) and the waves will be clean as a whistle. Thursday morning is the same deal: glassy wind, 3ft ESE swell, building to a 12-second period, and solid energy (263). These two mornings are the best of the first week. The water temp is about average for the time of year, so no surprises there.
The sessions degrade from Friday afternoon onward through the weekend and into the next week. There’s a gap of several days with no real recommendations. The swell drops off, the wind turns onshore, and the energy fades. A few days are just flat or choppy. By Sunday the 26th, the energy is starting to build again, but the wind is howling 19 mph from the S. That’s a big 4ft SE groundswell with a very long 15-second period, and strong energy (529). That’s a powerful swell, but the cross-off wind and the long period might make it a bit too straight for a beach break, and it’s more of a kite-surfing setup than a clean paddle session.
The real standout is the Saturday morning of the 25th. We’ve got a clean, glassy morning with a 5ft SSE swell. The energy is strong (380), and the period is 8 seconds. That’s a nice size for an advanced break like Prainha, and the glassy conditions will make it look epic. The crowd is a factor here, so get in early. That’s your day.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Wed afternoon, min 13°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 24°C on Sat afternoon, min 14°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sun 19 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | SSE 8 | SE 10 | ESE 11 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | E 8 | E 8 | ESE 10 | ESE 10 | E 8 | S 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 368 | 185 | 79 | 117 | 200 | 234 | 272 | 255 | 232 | 231 | 263 | 211 | 233 | 123 | 117 | 169 | 127 | 21 | 9 | 103 | 3 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross | cross-off | cross-off | cross-on | cross-off | glassy | on | cross-off | glassy | on | cross-on | glassy | cross-on | cross | cross | cross-on | cross | glassy | on |
High Tide | 1:54AM1.05m | 2:45PM1.37m | 2:34AM1.10m | 3:30PM1.36m | 3:13AM1.15m | 4:11PM1.31m | 3:50AM1.19m | 4:49PM1.23m | 4:28AM1.21m | 5:26PM1.15m | 5:07AM1.19m | 6:03PM1.07m | 5:50AM1.14m | ||||||||
Low Tide | 9:11PM0.43m | 8:08AM0.14m | 9:42PM0.49m | 8:31AM0.08m | 9:39PM0.56m | 8:57AM0.04m | 9:10PM0.57m | 9:25AM0.05m | 9:24PM0.54m | 9:56AM0.09m | 9:50PM0.50m | 10:28AM0.16m | 10:24PM0.46m | 11:02AM0.25m | |||||||
 |  | |  | | | |  | | | | | | | | | | | | | | |
 | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — |
 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — | — | 5:40 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 14 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 16 | 16 | 16 | 17 | 17 | 19 | 20 | 22 | 24 | 24 | 22 | 23 |
Feels °C | 13 | 11 | 13 | 13 | 14 | 15 | 16 | 16 | 17 | 16 | 16 | 15 | 16 | 17 | 19 | 20 | 21 | 22 | 23 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 10 | SE 8 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 12 | ESE 12 | E 8 | E 8 | E 8 | E 8 | ESE 10 | ENE 8 | E 8 | — |
| kJ | 125 | 185 | 55 | 117 | 200 | 234 | 272 | 255 | 232 | 231 | 263 | 211 | 233 | 90 | 100 | 169 | 127 | 21 | 171 | 103 | — |
Swell 2 Height (m) Direction Period (s) | ESE 12 | SE 12 | ESE 11 | SE 11 | E 7 | — | ESE 12 | — | — | ENE 5 | ENE 6 | E 6 | E 7 | ESE 12 | ESE 12 | ESE 11 | ESE 10 | S 13 | ESE 10 | E 9 | S 13 |
| kJ | 94 | 137 | 79 | 57 | 1 | — | 138 | — | — | 18 | 35 | 28 | 48 | 123 | 117 | 46 | 43 | 3 | 9 | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 8 | E 8 | — | — | — | — | — | — | — | — | — | — | S 18 | — | SE 14 | S 10 | — | — | — |
| kJ | — | — | 16 | 1 | — | — | — | — | — | — | — | — | — | — | 6 | — | 8 | 2 | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ENE 8 | — | E 8 | ENE 8 | — | ENE 8 |
| kJ | 368 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 352 | — | 134 | 403 | — | 146 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 52 | 11 | 80 | 0 | 0 | 68 | 0 | 0 | 73 | 0 | 0 | 73 | 4 | 0 | 73 | 4 | 4 | 73 | 4 | 0 | 73 |
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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