Surf Forecasts:
Rosa surf forecast from 19 Aug 2026:
- Best quality surf: Friday 21 Aug, 9PM (local time) - 10ft (3.0m), 9s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 3AM (local time) - 10ft (3.0m), 13s period, S swell with 3,017 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 9PM (local time) - 3.5ft (1.0m), 8s period with ENE swell.
Best Forecast Surf Conditions for Rosa this week:
The surf forecast for Rosa over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 9PM. The primary swell is predicted to be 1.0m and 8s period with a secondary swell of 0.4m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 3.0m 13s and forecast to arrive on Monday (Aug 24) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Friday (Aug 21) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Wed 19th Aug) | 3.5ft (1.0m) 8s |
| Best Surf | 9PM (Fri 21st Aug) | 10ft (3.0m) 9s |
| Most Powerful | 3AM (Mon 24th Aug) | 10ft (3.0m) 13s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, let’s break down what’s happening at Rosa (Rosa) over the next couple of weeks.
Water temp is about 66°F, which is normal for the season – nothing out of the ordinary.
The first few days are a bit of a washout. Wednesday the 19th and Thursday the 20th have small waves, but the wind is all wrong, so it’s not worth getting wet.
Friday the 21st morning offers a glimmer of hope. A clean 5ft SSW swell with a light offshore breeze and moderate energy (318). You’ll find a few rideable ones.
Saturday the 22nd morning looks really good. A solid 7ft S swell, period 9 seconds, with clean conditions and a gentle offshore wind. The combined energy is strong (1126). This is for the experienced crowd – the size is serious, but the quality is excellent.
Sunday the 23rd morning is a gem. Clear skies, a light 5 mph offshore wind, and a 5ft S swell with a 10-second period. Clean, fun, and solid energy (554).
The big standout is Monday the 24th morning. Glassy conditions, 5 mph wind, and a solid 8ft S swell with a 13-second period. The energy is huge (2512). This is a powerful, long-period groundswell – it’s gonna produce some proper waves. Only for experienced surfers, and because crowds here are “sometimes” an issue, you might have a few mates out.
After Monday, the quality drops. Onshore winds and chop take over through the rest of the week. There’s a bit of a lull until the start of September.
Wednesday the 2nd of September brings another pulse of long-period S swell (12 seconds, 6ft) but with rain and onshore flow, it’s messy.
Then Thursday the 3rd of September morning is worth a mention: glassy conditions again, 5 mph wind, and a 6ft S swell with a 12-second period. Strong energy (1091) and perfect, clean conditions – another session for the experienced crew.
In short: hit Saturday the 22nd, Sunday the 23rd, or Monday the 24th mornings. Monday the 24th is the one to circle – big, clean, and glassy. The rest of the time is mostly average or poor.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed afternoon. Warm (max 26°C on Thu afternoon, min 12°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Sat morning, min 10°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | S 8 | S 9 | S 9 | S 9 | S 9 | S 10 | S 12 | S 13 | S 13 | S 14 | S 13 | S 13 | S 12 | S 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 165 | 119 | 110 | 110 | 146 | 108 | 54 | 374 | 1252 | 885 | 449 | 311 | 545 | 1332 | 2483 | 2545 | 2534 | 1734 | 1070 | 690 | 488 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | cross | cross-on | cross-off | cross-off | cross | cross-off | cross-off | cross | glassy | cross-off | cross | cross-off | cross-off | cross-on | cross | cross | cross | cross |
High Tide | 12:02PM0.42m | 5:50AM0.48m | 12:30PM0.49m | 00:33AM0.28m | 7:15AM0.41m | 12:52PM0.54m | 00:32AM0.31m | 1:10PM0.58m | 7:31PM0.38m | 1:24PM0.61m | 11:38PM0.43m | 1:34PM0.64m | 00:01AM0.50m | 1:43PM0.66m | 00:28AM0.58m | ||||||
Low Tide | 1:09PM0.41m | 9:25PM0.21m | 8:57AM0.38m | 2:56PM0.45m | 9:57PM0.24m | 8:44AM0.40m | 5:09PM0.43m | 10:27PM0.29m | 4:11AM0.22m | 6:18PM0.38m | 5:19AM0.15m | 6:41PM0.33m | 6:09AM0.09m | 7:08PM0.30m | 6:51AM0.03m | 7:34PM0.27m | |||||
 |  |  | | |  |  | | | |  | | | | | | | | | |  | |
 | 6:41 | — | — | 6:41 | — | — | 6:39 | — | — | 6:39 | — | — | 6:37 | — | — | 6:37 | — | — | 6:35 | — | — |
 | — | 5:53 | — | — | 5:53 | — | — | 5:54 | — | — | 5:54 | — | — | 5:55 | — | — | 5:55 | — | — | 5:57 | — |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 21 | 19 | 24 | 26 | 20 | 20 | 19 | 14 | 15 | 14 | 13 | 14 | 13 | 13 | 14 | 14 | 13 | 18 | 18 | 15 |
Feels °C | 24 | 22 | 21 | 23 | 25 | 20 | 17 | 15 | 10 | 12 | 11 | 12 | 11 | 9 | 9 | 12 | 11 | 10 | 15 | 15 | 13 |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | S 9 | S 9 | ENE 7 | SSW 6 | ENE 7 | ENE 8 | S 9 | S 9 | S 9 | S 10 | S 12 | S 13 | S 13 | S 14 | S 13 | S 13 | S 12 | S 12 |
| kJ | 165 | 119 | 110 | 108 | 54 | 108 | 48 | 51 | 51 | 651 | 449 | 311 | 545 | 1022 | 2483 | 2545 | 2534 | 1734 | 1070 | 690 | 488 |
Swell 2 Height (m) Direction Period (s) | S 9 | S 9 | S 7 | SE 12 | SE 12 | SE 6 | ENE 7 | E 11 | — | ENE 9 | ENE 9 | S 11 | NE 8 | NE 8 | ENE 7 | ENE 7 | NE 7 | — | — | — | — |
| kJ | 2 | 1 | 24 | 6 | 6 | 1 | 54 | 2 | — | 65 | 70 | 125 | 17 | 15 | 5 | 5 | 2 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 12 | S 7 | S 10 | — | — | SE 11 | S 8 | — | — | — | — | ENE 9 | — | — | — | — | — | — | — | — | — |
| kJ | 6 | 1 | 18 | — | — | 5 | 1 | — | — | — | — | 49 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 3 | SSW 3 | — | ENE 8 | ENE 7 | S 8 | SSW 6 | S 8 | S 9 | S 9 | — | — | — | S 12 | — | — | — | NNE 3 | NE 4 | NE 4 | NE 5 |
| kJ | 2 | 2 | — | 110 | 146 | 33 | 64 | 374 | 1252 | 885 | — | — | — | 1332 | — | — | — | 7 | 11 | 35 | 62 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 12 | 2 | 24 | 11 | 24 | 2 | 0 | 2 | 0 | 0 | 24 | 0 | 0 | 12 | 15 | 25 | 12 | 4 |
Best forecast wave conditions in Santa Catarina - Sul | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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Information about the Rosa Surf forecast
The above surf forecast table for Rosa provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rosa can be found by selecting the local surf guide option on the grey menu. Our Rosa 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 (Rosa) 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 Rosa 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.
Rosa is 12 km (7 miles) from Imbituba. If you plan a holiday in Santa Catarina - Sul, look for hotels and other accommodation in Imbituba. Imbituba has rooms for a wide range of budgets as well as car hire and transport links.
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