Surf Forecasts:
Rosa surf forecast from 6 Sep 2026:
- Best quality surf: Sunday 6 Sep, 3PM (local time) - 10ft (3.0m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Saturday 12 Sep, 3PM (local time) - 10ft (3.0m), 10s period, SE swell with 1,572 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 3PM (local time) - 10ft (3.0m), 10s period with S 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 Sunday (Sep 06) at 3PM. The primary swell is predicted to be 3.0m and 10s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 3.0m 10s and forecast to arrive on Saturday (Sep 12) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Sun 6th Sep) | 10ft (3.0m) 10s |
| Best Surf | 3PM (Sun 6th Sep) | 10ft (3.0m) 10s |
| Most Powerful | 3PM (Sat 12th Sep) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, Rusty here again. Let's talk about what's happening at Rosa.
Water temp is about 65°F – right where it should be for this time of year.
We start off this Sunday, the 6th. The morning has a 8ft S swell at 8 seconds, with a cross-off breeze. It's surfable but a bit messy. Energy is moderate (971). By the afternoon, it jumps to a 10ft S swell, 10-second period, and strong energy (1522). That’s just too big for this spot – it’s going to be a mess of whitewater. Experts only, maybe.
Monday the 7th morning is the standout. A clean 6ft S swell, 10-second period, with a light cross-off from the SW at 6 mph. The energy is a solid moderate (551). Conditions are clean, the waves will have shape – this is the session you want. Crowds are possible, so don’t sleep in.
Tuesday the 8th is weak. Swell drops to 4ft, winds go cross, and by the afternoon it’s choppy. Skip it.
Wednesday the 9th morning is interesting. A 5ft ENE swell, period short at 8 seconds, but the wind is glass – absolutely flat calm. Energy is strong (685). It’ll be clean and lined up despite the short period.
Thursday the 10th is another good one. The morning has a 3ft S swell with a 12-second period – proper groundswell. Energy is moderate (592). The afternoon goes glassy with a 3ft S swell and a 14-second period (552). Long waits between sets, but the waves will be beautifully shaped.
Friday the 11th and Saturday the 12th morning are okay but not top tier. Saturday afternoon is a big 10ft SE swell with cross winds – too big for comfort.
The week after that is mostly onshore and messy. Friday the 18th morning has a tiny 2ft E swell with no wind at all – glassy but very ordinary.
Saturday the 19th morning brings a big 7ft S swell with a 15-second period – that’s very long period groundswell, and the energy is very strong (1830). But the wind is a moderate cross-shore. It’ll be powerful, but that long period can make beach breaks a bit straight.
From the 20th on, it’s mostly short-period windswell and messy conditions. Nothing to write home about.
So the clear pick is Monday morning the 7th at Rosa – 6ft, clean, light offshores. That’s your window. Thursday the 10th is a solid backup for the glassy groundswell.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Tue afternoon, min 8°C on Sun night). Winds decreasing (fresh winds from the SSW on Sun morning, light winds from the NNW by Tue night). | Days 4-6 Weather SummaryModerate rain (total 19mm), heaviest on Fri night. Warm (max 22°C on Wed morning, min 17°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | S 8 | S 10 | S 10 | S 10 | S 10 | S 10 | SSE 10 | S 9 | NE 8 | ENE 8 | ENE 8 | ENE 8 | S 12 | S 14 | S 13 | E 8 | ENE 8 | ENE 8 | SE 9 | SE 10 | ESE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 925 | 1509 | 1212 | 546 | 490 | 450 | 328 | 180 | 183 | 344 | 361 | 223 | 233 | 416 | 268 | 146 | 185 | 94 | 719 | 1572 | 1247 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | on | cross-off | cross | cross-on | cross | glassy | on | off | cross-off | glassy | glassy | cross | cross-on | cross | cross-off | cross | cross |
High Tide | 1:10PM0.74m | 00:51AM0.39m | 1:47PM0.76m | 00:49AM0.44m | 2:19PM0.73m | 00:15AM0.51m | 2:42PM0.68m | 00:26AM0.59m | 2:32PM0.61m | 00:53AM0.66m | 2:04PM0.57m | 1:26AM0.71m | 2:08PM0.57m | 2:01AM0.72m | |||||||
Low Tide | 9:19PM0.31m | 5:42AM0.05m | 7:11PM0.32m | 6:31AM-0.02m | 7:29PM0.31m | 7:13AM-0.06m | 7:51PM0.30m | 7:52AM-0.07m | 8:15PM0.28m | 8:29AM-0.03m | 8:38PM0.26m | 9:03AM0.03m | 8:57PM0.23m | ||||||||
 | |  |  | | | | |  | | |  |  | |  |  | |  | | | | |
 | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:02 | — | — | 6:02 | — | — | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | 3 | 3 | 10 | — | — | 5 |
Temp °C | 13 | 13 | 11 | 14 | 13 | 12 | 20 | 21 | 16 | 22 | 21 | 17 | 21 | 19 | 18 | 19 | 19 | 19 | 24 | 21 | 19 |
Feels °C | 6 | 6 | 6 | 11 | 10 | 9 | 17 | 17 | 15 | 22 | 22 | 18 | 22 | 21 | 20 | 21 | 20 | 20 | 25 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | E 8 | ENE 8 | S 10 | S 10 | S 10 | S 10 | SSE 10 | S 9 | E 7 | ENE 8 | S 11 | ENE 8 | ENE 8 | ENE 8 | E 8 | E 8 | ENE 8 | NE 5 | SE 9 | SE 10 | ESE 10 |
| kJ | 32 | 13 | 936 | 546 | 490 | 450 | 328 | 180 | 127 | 344 | 253 | 223 | 163 | 133 | 124 | 146 | 185 | 31 | 719 | 1572 | 1247 |
Swell 2 Height (m) Direction Period (s) | E 9 | — | E 8 | E 8 | E 8 | ENE 8 | E 5 | SE 12 | NE 8 | S 12 | SE 10 | S 10 | S 12 | S 14 | S 13 | S 12 | S 11 | ENE 8 | ENE 8 | ENE 8 | S 13 |
| kJ | 14 | — | 5 | 5 | 5 | 12 | 19 | 68 | 108 | 274 | 4 | 90 | 233 | 416 | 268 | 100 | 61 | 94 | 89 | 55 | 272 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | ENE 8 | ENE 7 | S 16 | SSE 10 | SSE 10 | — | S 13 | SSE 16 | SE 8 | E 14 | E 13 | SSE 5 | SE 6 | — | S 15 | NE 7 |
| kJ | — | — | — | — | — | 12 | 10 | 5 | 146 | 67 | — | 156 | 196 | 3 | 4 | 13 | 11 | 35 | — | 38 | 43 |
Wind waves Height (m) Direction Period (s) | S 8 | S 10 | S 10 | — | — | NE 3 | — | ENE 6 | NE 8 | — | ENE 8 | — | — | — | — | — | — | NNE 4 | ENE 8 | — | NNE 5 |
| kJ | 925 | 1509 | 1212 | — | — | 5 | — | 150 | 183 | — | 361 | — | — | — | — | — | — | 50 | 106 | — | 44 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 29 | 472 | 2 | 0 | 12 | 0 | 4 | 2 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 0 | 24 | 80 |
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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