
Surf Forecasts:
Rosa surf forecast from 4 Aug 2026:
- Best quality surf: Saturday 8 Aug, 9PM (local time) - 6ft (1.8m), 13s period, S swell with cross-offshore winds.
- Most powerful swell: Saturday 8 Aug, 9AM (local time) - 6ft (1.9m), 14s period, S swell with 1,427 kJ wave energy.
- Next surfable swell (1★+): Wednesday 5 Aug, 9AM (local time) - 2.5ft (0.8m), 10s period with SSE 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 05) at 9AM. The primary swell is predicted to be 0.8m and 10s period with a secondary swell of 0.9m and 7s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 1.9m 14s and forecast to arrive on Saturday (Aug 08) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Friday (Aug 07) at 12PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Wed 5th Aug) | 2.5ft (0.8m) 10s |
| Best Surf | 9PM (Sat 8th Aug) | 6ft (1.8m) 13s |
| Most Powerful | 9AM (Sat 8th Aug) | 6ft (1.9m) 14s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
G’day, it’s Rusty here. Let’s cut through the noise and look at what’s actually on the menu for the next couple of weeks at Rosa.
Right off the bat, the first two days are pretty ordinary. Tuesday’s got some cross and cross-on breeze with only about 3ft of south swell – swimable but nothing to get excited about. There's a bit of energy in the water, but the conditions just aren't there to make it worth your while.
Wednesday morning is where we start to see a glimmer. The wind goes glassy early with a bit of S/SSE swell around 3ft, and that’s about as clean as it gets for a small day. It’s surfable, but you’ll be fighting for waves. The afternoon turns a bit onshore and confused, so make the most of the morning window.
Thursday and Friday are a mixed bag. Thursday morning has a cross-off breeze but the swell is weak and short-period, so it’s pretty lackluster. Friday morning looks cleaner with a cross-off wind and a touch more push, but it’s still not big. Honestly, the first five days are all pretty much the same – small, short-period swell and inconsistent conditions.
Then, a change on Saturday the 8th. The south swell starts to fill in with chest to head-high sets (6ft) and a longer period of 14 seconds. The energy jumps up significantly – you can feel the ocean waking up (combined energy around 1568 to 1697). But – and there’s always a but – the wind is cross and picking up, so it’s going to be lumpy and chunky. Not the kind of day you’d set the alarm for.
Sunday the 9th drops back a touch and stays a bit messy. The swell is there but the cross-off wind keeps it clean enough, just not the standout.
Now, keep your eyes on Monday the 10th. That’s the one. The south swell holds around 5-6ft with a solid 12-second period, the wind goes light and cross-off, and it’s glassy clean. This is the pick of the bunch for the week – good shape, good energy (combined around 808-912), and the break will be showing its best face. This is when you want to be out there.
Tuesday the 11th holds onto some of that quality in the morning with clean lines, but the afternoon gets a bit cross-on and messy.
Wednesday the 12th is a write-off. Onshore breeze, chopped up – not worth getting wet.
Thursday the 13th is patchy. There’s a bit of swell in the morning but it’s short-period and cross, so it’s not great. The afternoon swings back to the south but it’s still not clean.
Now, for the second week, the standout is Friday the 14th. Another excellent window – the swell builds to 5-6ft from the south with a longer 13-second period, and the morning has light cross-off winds and clean conditions. This has proper potential, especially if you’re an experienced surfer looking for some juice. The afternoon gets a bit cross, so go early.
After that, it fades into more ordinary territory. Saturday the 15th has some size but it’s choppy and onshore. Sunday the 16th starts clean but the wind howls in the afternoon, so it’s a short window. Monday the 17th has a bit of south swell but it’s onshore and average. And the final couple of days – Tuesday the 18th and Wednesday the 19th – are pretty poor with onshore wind and messy conditions.
So, what’s the call? If you want the best of the lot, circle Monday the 10th and Friday the 14th. Both have clean conditions, solid south swell, and that’s where you’ll find the best waves. Saturday the 8th has the size but not the wind. Everything else is pretty much forgettable.
Just a note – the water temp is sitting about average for this time of year, so nothing crazy there. And if you’re heading out on the bigger days, remember that long-period groundswell likes the points and reefs more than the beach breaks, so keep that in mind.
Stay stoked, and I’ll see you out there.
– Rusty
Short Range ForecastLight rain (total 6mm), mostly falling on Thu morning. Warm (max 25°C on Thu morning, min 18°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Sun morning. Warm (max 23°C on Thu night, min 13°C on Sun morning). Wind will be generally light. | ||||||||||||||||||
Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | ||||||||||||||
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) | S 12 | S 12 | S 12 | S 11 | SSE 10 | NE 7 | SSE 9 | ENE 7 | ENE 8 | NE 8 | ENE 8 | S 7 | S 10 | S 14 | S 14 | S 13 | S 12 | S 12 | S 11 |
Wave Graph | |||||||||||||||||||
143 | 271 | 336 | 242 | 136 | 114 | 92 | 70 | 158 | 169 | 209 | 233 | 562 | 1427 | 1391 | 986 | 566 | 403 | 253 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | glassy | on | cross | cross-off | cross-on | cross | cross-off | cross | glassy | cross | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:42AM0.61m | 5:16PM0.49m | 10:32PM0.34m | 5:32AM0.55m | 5:47PM0.43m | 11:32PM0.35m | 6:39AM0.48m | 6:19PM0.37m | 12:31PM0.61m | 6:54PM0.32m | 1:17PM0.70m | 1:12AM0.38m | 2:00PM0.75m | 1:17AM0.39m | |||||
Low Tide | 00:06AM0.30m | 12:49PM0.21m | 9:14PM0.34m | 9:47AM0.39m | 2:10PM0.28m | 9:13PM0.32m | 8:58AM0.45m | 3:48PM0.32m | 9:24PM0.30m | 3:42AM0.24m | 5:46PM0.32m | 9:34PM0.29m | 4:54AM0.17m | 7:11PM0.29m | 5:56AM0.09m | 7:43PM0.29m | |||
— | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:50 | — | — | |
— | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | — | 5:47 | — | — | 5:49 | — | |
mm | 1 | 2 | — | — | — | — | — | 3 | — | 4 | — | — | 1 | 2 | — | 2 | 4 | 2 | 4 |
Temp °C | 19 | 21 | 24 | 20 | 24 | 22 | 20 | 25 | 25 | 23 | 22 | 19 | 15 | 17 | 22 | 19 | 14 | 13 | 13 |
Feels °C | 20 | 22 | 25 | 21 | 25 | 23 | 21 | 25 | 25 | 24 | 23 | 17 | 13 | 15 | 21 | 19 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 11 | ENE 7 | ENE 7 | ENE 6 | ENE 7 | SSE 9 | SE 9 | ENE 8 | ENE 8 | S 10 | S 14 | S 14 | S 13 | S 12 | S 12 | S 11 |
143 | 271 | 336 | 242 | 68 | 85 | 64 | 70 | 44 | 19 | 209 | 123 | 562 | 1427 | 1391 | 986 | 566 | 403 | 253 | |
Swell 2 Height (m) Direction Period (s) | SE 11 | NE 7 | ESE 10 | ESE 11 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 12 | SSE 11 | S 10 | — | ENE 8 | ENE 8 | — | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
32 | 69 | 22 | 11 | 136 | 102 | 92 | 46 | 30 | 24 | 18 | — | 157 | 134 | — | 175 | 74 | 50 | 52 | |
Swell 3 Height (m) Direction Period (s) | S 5 | SE 11 | — | ENE 6 | ESE 11 | S 12 | S 11 | SSE 13 | S 10 | S 9 | SSE 8 | — | S 13 | — | — | — | — | — | E 13 |
1 | 30 | — | 4 | 11 | 3 | 2 | 18 | 8 | 6 | 13 | — | 155 | — | — | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | NNE 4 | NE 7 | ENE 7 | N 4 | NE 7 | NE 6 | — | ENE 8 | NE 8 | SSW 3 | S 7 | — | NNE 3 | NE 8 | — | S 6 | S 7 | S 7 |
88 | 22 | 91 | 78 | 9 | 114 | 79 | — | 158 | 169 | 2 | 233 | — | 7 | 306 | — | 62 | 158 | 152 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2 | 3 | 12 | 3 | 0 | 2 | 2 | 0 | 2 | 2 | 0 | 7 | 0 | 2 | 25 | 24 | 15 | 24 | 7 |
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.











