Surf Forecasts:
Prainha surf forecast from 14 Sep 2026:
- Best quality surf: Monday 14 Sep, 3AM (local time) - 4.5ft (1.3m), 7s period, SSE swell with offshore winds.
- Most powerful swell: Sunday 20 Sep, 3AM (local time) - 5ft (1.5m), 8s period, E swell with 324 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 3AM (local time) - 4.5ft (1.3m), 7s 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 (Sep 14) at 3AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.8m and 7s. Another secondary swell of 0.3m and 8s is also forecast. 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 8s and forecast to arrive on Sunday (Sep 20) at 3AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.2m 8s period and expected on Saturday (Sep 19) at 3PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Mon 14th Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 3AM (Mon 14th Sep) | 4.5ft (1.3m) 7s |
| Most Powerful | 3AM (Sun 20th Sep) | 5ft (1.5m) 8s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’ve gotta be straight with you—this stretch for Prainha is a bit of a disappointment. The whole 16-day window is filled with small, messy waves and winds that just keep messing things up. There ain’t a single standout day where everything clicks. If you’re not paddling out, you’re not missing much.
The first bit of surf worth mentioning is on the morning of Monday the 14th. We’ve got weak swell coming in from the SSE at 4ft, but with a short 7-second period and a cross-offshore wind from the SW at 9 mph, it’s just grovelly and poor. The combined swell energy is a weak 190. Not worth the hassle.
Tuesday the 15th sees the same story: small 2ft SE swell with a 9-second period. Morning has a clean cross-off wind at 3 mph, making it look tidy but the waves are tiny. The energy is a weak 148. Afternoon turns choppy with that cross-on ESE wind. Nothing to plan your day around.
Wednesday the 16th is a write-off. Winds cross and cross-on, swell is 2–2ft, and the energy is pathetic. Thursday the 17th morning goes glassy with an ESE wind at just 3 mph, and that 2ft SE swell at 10 seconds looks clean, but it’s knee-high at best. Weak energy (96). It’s okay if you’re desperate for a slippery session.
From Friday the 18th onward, the winds get stronger and more onshore, killing any chance of quality. Saturday the 19th sees a bump in swell to 5ft from the E at 8 seconds, but with an 18 mph onshore wind, it’s a washing machine. Combined energy is 338, but the waves will be lumpy and blown out.
Then there’s a big gap from Monday the 23rd right through to the end of the window on Tuesday the 29th. The swell drops to under 3ft, the direction stays east with short periods, and the wind is mostly onshore or cross-on. A couple of glassy mornings pop up on the 24th and 25th, but the swell is tiny—3ft and dropping. Monday the 29th morning shows a slight pulse of 4ft from the east with a 6-second period, but the energy is a moderate 204 and it’s still onshore.
Honestly, if you’re packing a paddle board, you might get a few knee-slappers on the glassy mornings, but for a proper surf, this whole outlook is a bust. The water temp anomaly isn’t even mentioned in the data, so assume it’s about average for this time of year.
Rusty.
Short Range ForecastHeavy rain (total 21mm), heaviest during Sun night. Very mild (max 17°C on Tue afternoon, min 12°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 29mm), heaviest during Sat morning. Very mild (max 19°C on Fri morning, min 16°C on Wed night). Winds increasing (calm on Thu morning, fresh winds from the NE by Fri night). | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | SSE 7 | SSE 7 | SE 9 | SE 8 | SE 9 | SE 9 | ESE 8 | E 8 | SE 9 | SE 9 | SE 10 | SE 12 | SE 12 | ENE 5 | E 6 | E 7 | E 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 240 | 139 | 68 | 44 | 53 | 95 | 98 | 42 | 73 | 51 | 68 | 50 | 35 | 62 | 48 | 270 | 302 | 287 | 313 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | off | cross-off | cross-on | cross | cross | cross-on | cross-on | glassy | on | on | on | on | on | on | cross-on | cross-on |
High Tide | 4:11AM1.30m | 4:24PM1.12m | 4:47AM1.20m | 4:46PM1.03m | 5:29AM1.08m | 5:05PM0.94m | 6:25AM0.96m | 3:17PM0.86m | 7:47AM0.87m | 2:57PM0.84m | 7:29PM0.75m | 3:37AM0.60m | 2:39PM0.82m | 9:26PM0.76m | |||||
Low Tide | 9:02PM0.16m | 9:27AM0.19m | 9:31PM0.14m | 9:52AM0.29m | 10:01PM0.16m | 10:20AM0.40m | 10:35PM0.22m | 10:50AM0.52m | 11:13PM0.32m | 11:26AM0.65m | 6:08PM0.74m | 4:56AM0.59m | 12:22PM0.78m | 6:24PM0.64m | |||||
 |  | |  |  |  |  | | |  | | | |  | |  |  | | | |
 | — | 6:13 | — | — | 6:11 | — | — | 6:09 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:06 | — | 6:06 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — |
mm | 11 | 3 | 3 | — | — | — | 2 | 2 | — | — | — | — | 1 | 2 | 2 | 7 | 12 | 5 | 18 |
Temp °C | 14 | 13 | 13 | 14 | 16 | 17 | 17 | 16 | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 |
Feels °C | 10 | 10 | 11 | 12 | 14 | 15 | 16 | 15 | 14 | 14 | 17 | 16 | 15 | 18 | 18 | 17 | 17 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 7 | SE 9 | SE 8 | E 8 | E 8 | ESE 8 | E 8 | SE 9 | SE 9 | SE 10 | SE 12 | E 4 | E 5 | E 6 | E 7 | SE 12 | E 8 | E 8 |
| kJ | 77 | 33 | 68 | 44 | 44 | 61 | 81 | 42 | 73 | 51 | 68 | 50 | 9 | 26 | 48 | 91 | 22 | 287 | 313 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 9 | E 8 | E 9 | SE 9 | SE 9 | SE 8 | SE 8 | E 8 | ESE 8 | E 8 | ESE 8 | SE 12 | SE 11 | SSE 10 | ESE 12 | SSE 12 | SE 9 | SE 9 |
| kJ | 10 | 14 | 13 | 23 | 53 | 50 | 11 | 10 | 30 | 19 | 18 | 19 | 35 | 29 | 9 | 14 | 14 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | SE 13 | SE 11 | E 5 | E 4 | SSE 8 | S 8 | SSE 13 | SE 12 | E 13 | SE 13 | E 11 | E 11 | ESE 10 | ESE 10 | ESE 10 | SSE 9 | — | SE 12 | SE 11 |
| kJ | 7 | 4 | 4 | 4 | 51 | 51 | 16 | 23 | 3 | 27 | 10 | 9 | 10 | 18 | 10 | 8 | — | 5 | 5 |
Wind waves Height (m) Direction Period (s) | SSE 7 | SSE 7 | — | — | — | SE 9 | SE 8 | SE 5 | — | — | — | — | ENE 4 | ENE 5 | — | E 7 | E 8 | ENE 8 | ENE 8 |
| kJ | 240 | 139 | — | — | — | 95 | 98 | 20 | — | — | — | — | 19 | 62 | — | 270 | 302 | 630 | 678 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 11 | 11 | 0 | 0 | 0 | 126 | 61 | 61 | 235 | 91 | 0 | 73 | 52 | 73 | 224 | 213 | 213 | 73 | 4 |
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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