Surf Forecasts:
Prainha surf forecast from 27 Aug 2026:
- Best quality surf: Friday 28 Aug, 9AM (local time) - 3.5ft (1.0m), 7s period, E swell with glassy winds.
- Most powerful swell: Wednesday 2 Sep, 3AM (local time) - 3.5ft (1.0m), 12s period, SE swell with 281 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 9AM (local time) - 3.5ft (1.0m), 7s 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 Friday (Aug 28) at 9AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.4m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Prainha in the next 16 days are 1.0m 12s and forecast to arrive on Wednesday (Sep 02) 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 1.6m 8s period and expected on Friday (Aug 28) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 28th Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 9AM (Fri 28th Aug) | 3.5ft (1.0m) 7s |
| Most Powerful | 3AM (Wed 2nd Sep) | 3.5ft (1.0m) 12s |
Table - best surf conditions forecast for Prainha over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s brewing for Prainha over the next couple weeks. The water’s running about 68°, which is a degree warmer than average for this time—so it’s a bit of a bonus.
Thursday morning the 27th starts off with a clean 3 ft swell out of the southeast, light crosswind, and glassy water. The combined energy is moderate at 293, with a long 14-second period. That’ll bring some push, but at a beach break, that long period can make it a bit closeout. It’s marginal, not a standout.
Friday morning the 28th is a bit better. Glassy conditions with a light offshore breeze from the southwest, and 3 ft from the east. The period is short at 7 seconds, so it’s a wind swell—more frequent but less grunt. Energy is moderate at 157. Surfable and clean, but ordinary.
Saturday morning the 29th is similar: glassy, 4 ft from the east, short period of 8 seconds, moderate energy at 142. Clean, but nothing special.
The pattern holds through the start of the next week. Monday morning the 31st has 3 ft from the east, light offshore wind, 9-second period, moderate energy at 130. Clean. Tuesday morning the 1st of September is the same deal, 3 ft, clean, but small.
The real standout appears in the second week. Thursday morning the 10th of September shows a jump: 5 ft from the south-southeast, 6-second period, with a light offshore from the west-southwest. The combined energy hits 294—moderate to strong—and the report says “expect good surf conditions.” This is the best window of the whole outlook. That size is good for advanced surfers, but will be a handful for beginners. The direction is off the SSE, not the ideal S, but it’ll work.
Then Friday morning the 11th of September is the other highlight: 5 ft from the east-southeast, glassy, light wind from the west. Energy is moderate at 274, and again “expect good surf conditions.” That morning will be clean, with a bit more shape. The period is short at 6 seconds, so it’ll be a little crumbly, but glassy offshore is a huge plus for clean faces. That’s the morning to aim for, if you can handle it.
Crowds at Prainha are sometimes an issue, so don’t expect solitude.
First week is small and average, with a few clean windows. Second week brings the real action, especially Thursday and Friday mornings. After that, the wind turns and the swell drops.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sat morning, min 18°C on Thu morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 39mm), heaviest during Mon night. Warm (max 20°C on Sun afternoon, min 17°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the SE by Tue morning). | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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 14 | SE 13 | E 7 | SE 12 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | E 9 | E 9 | SE 12 | SE 12 | SE 11 | SE 11 |
Wave Graph | |||||||||||||||||||||
293 | 179 | 110 | 106 | 21 | 142 | 138 | 124 | 102 | 84 | 82 | 153 | 127 | 119 | 68 | 102 | 81 | 263 | 207 | 155 | 177 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | glassy | cross-on | cross-on | glassy | cross | cross-off | cross-off | cross | cross-on | off | glassy | cross-off | cross-off | cross | cross | cross-on | on | cross |
High Tide | 2:48PM1.38m | 2:43AM1.39m | 3:22PM1.39m | 3:19AM1.41m | 3:55PM1.35m | 3:56AM1.39m | 4:30PM1.28m | 4:35AM1.33m | 5:07PM1.17m | 5:20AM1.23m | 5:47PM1.03m | 6:15AM1.12m | 6:36PM0.89m | ||||||||
Low Tide | 8:29PM0.31m | 8:40AM-0.03m | 8:43PM0.27m | 9:01AM-0.02m | 9:03PM0.24m | 9:26AM0.02m | 9:28PM0.22m | 9:54AM0.11m | 9:57PM0.22m | 10:24AM0.23m | 10:29PM0.25m | 10:58AM0.39m | 11:06PM0.31m | ||||||||
6:31 | — | — | 6:31 | — | — | 6:30 | — | — | 6:28 | — | — | 6:28 | — | — | 6:26 | — | — | 6:26 | — | — | |
— | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 4 | 31 | — | — | — | — | — | 4 |
Temp °C | 19 | 20 | 20 | 20 | 20 | 21 | 23 | 20 | 19 | 19 | 20 | 19 | 20 | 20 | 20 | 20 | 18 | 17 | 17 | 18 | 16 |
Feels °C | 19 | 20 | 20 | 20 | 20 | 21 | 22 | 20 | 17 | 20 | 20 | 21 | 22 | 23 | 21 | 21 | 15 | 13 | 15 | 17 | 13 |
Swell 1 Height (m) Direction Period (s) | SE 14 | SE 14 | E 7 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | E 9 | E 9 | SE 12 | SE 12 | SE 11 | SE 11 |
293 | 179 | 110 | 106 | 115 | 142 | 138 | 124 | 102 | 84 | 82 | 153 | 127 | 119 | 68 | 102 | 81 | 263 | 207 | 155 | 177 | |
Swell 2 Height (m) Direction Period (s) | E 5 | — | SE 13 | SE 12 | SE 12 | SE 11 | SE 10 | SE 10 | SSE 5 | SE 10 | SE 10 | SE 10 | SE 9 | SE 6 | SE 7 | SE 7 | — | E 9 | E 10 | E 9 | E 9 |
14 | — | 106 | 51 | 21 | 19 | 4 | 4 | 15 | 4 | 4 | 4 | 3 | 39 | 28 | 24 | — | 87 | 67 | 45 | 26 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SE 10 | — | — | SE 10 | — | — | ESE 8 | — | — | SSE 12 | — | — | — |
— | — | — | — | — | — | — | — | 4 | — | — | 4 | — | — | 13 | — | — | 172 | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | E 6 | ENE 7 | — | ENE 8 | — | — | — | SSE 5 | SSE 5 | SSE 5 | — | S 6 | — | — | WSW 3 | SE 7 | — | — | — | — |
— | 34 | 210 | — | 234 | — | — | — | 40 | 9 | 8 | — | 3 | — | — | 2 | 42 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 73 | 4 | 0 | 4 | 4 | 0 | 128 | 28 | 0 | 128 | 33 | 0 | 0 | 0 | 0 | 133 | 52 | 52 | 235 | 126 |
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.











