
Surf Forecasts:
Rosa surf forecast from 28 Jul 2026:
- Best quality surf: Saturday 1 Aug, 9PM (local time) - 6ft (1.8m), 7s period, NE swell with cross-offshore winds.
- Most powerful swell: Tuesday 4 Aug, 3AM (local time) - 3.5ft (1.1m), 12s period, S swell with 344 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 12PM (local time) - 5ft (1.5m), 6s period with NNE 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 Tuesday (Jul 28) at 12PM. The primary swell is predicted to be 1.5m and 6s period with a secondary swell of 1.1m and 6s. Another secondary swell of 0.5m and 12s is also forecast. 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 1.1m 12s and forecast to arrive on Tuesday (Aug 04) at 3AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Sunday (Aug 02) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Tue 28th Jul) | 5ft (1.5m) 6s |
| Best Surf | 9PM (Sat 1st Aug) | 6ft (1.8m) 7s |
| Most Powerful | 3AM (Tue 4th Aug) | 3.5ft (1.1m) 12s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a look at what we've got on offer at Rosa over the next couple of weeks. It's a bit of a slow starter, but there's some serious promise further down the track if you can be patient.
Right now and for the first few days, it's pretty flat and ordinary. We have a few days of very small swell, mostly around the 2ft to 3ft mark, but the wind is messy and the quality is just not there. Don't bother paddling out Tuesday the 28th or Wednesday the 29th – it's a write-off. Thursday the 30th offers a tiny bit of relief with some clean, glassy conditions in the afternoon on a weak 2ft S swell (combined energy of 134), but it's nothing to get excited about. Friday the 31st gets blown out by strong northerly winds, and Saturday the 1st of August is a total mess with a short-period 6ft NE windswell (energy of 325) and howling winds – that's kite-surfing territory, not for a paddle board. Sunday the 2nd and Monday the 3rd clean up a little with some glassy periods, but the swell is weak and short-period, just a 4ft ENE on Sunday and a 3ft ENE on Monday. It’s a long, poor run to start.
Now, things start to look interesting on Tuesday the 4th of August. The morning is the first real standout of the forecast. We've got a clean 4ft S swell rolling in with a solid 11-second period, and the wind is glassy. The combined energy jumps up to a moderate 576, and conditions are expected to be very good. This is the day to get a session in. That south swell direction is also spot-on for the exposed orientation of Rosa. Wednesday the 5th is also decent with a glassy 3ft SSE swell in the morning (energy of 269), but the Tuesday morning is the clear early winner.
After a bit of a lull and some more messy northerly wind days from the 6th through the 9th, the second week builds to another solid run. Monday the 10th of August morning shapes up as another absolute standout. We're looking at a glassy 4ft S swell with an 11-second period, and the energy is back up at a strong 545. That's a beautiful setup for Rosa, and it should be worth the wait.
Tuesday the 11th carries on the theme with a clean, cross-offshore 4ft SSE swell in the morning (energy of 528), again promising very good conditions. Wednesday the 12th looks a bit more marginal with onshore wind and a mixed-up swell.
For the standout, I'd say lock in Tuesday the 4th of August. That glassy morning with a solid 4ft south groundswell is your best bet in this window, offering clean, well-shaped waves that suit Rosa perfectly. The Monday the 10th morning is a very close second, another glassy winner with similar energy.
Water temp is about average for the time of year, nothing unusual to report.
Stay patient, and don't sleep on that Tuesday morning session.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Warm (max 24°C on Tue morning, min 16°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sat afternoon, min 16°C on Thu night). Winds decreasing (fresh winds from the NE on Fri afternoon, calm by Sat night). | ||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | ||||||||||||||
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) | ESE 8 | NE 6 | S 12 | S 11 | S 12 | S 11 | S 10 | S 9 | S 9 | SSE 9 | S 12 | S 12 | NE 6 | NE 7 | NE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||
61 | 78 | 97 | 116 | 99 | 146 | 94 | 85 | 83 | 151 | 110 | 134 | 160 | 284 | 306 | 202 | 134 | 96 | 91 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | glassy | glassy | cross-on | cross-off | cross-off | glassy | cross | cross | cross-on | cross | cross | cross-on | glassy | cross-off | cross | cross-off |
High Tide | 00:32AM0.53m | 2:13PM0.65m | 1:07AM0.59m | 2:32PM0.65m | 1:40AM0.64m | 2:55PM0.65m | 2:13AM0.67m | 3:20PM0.64m | 2:47AM0.69m | 3:47PM0.62m | 3:22AM0.68m | 4:15PM0.59m | |||||||
Low Tide | 7:50AM0.02m | 8:35PM0.29m | 8:26AM-0.01m | 9:03PM0.29m | 9:02AM-0.03m | 9:30PM0.29m | 9:37AM-0.02m | 10:00PM0.29m | 10:14AM0.00m | 10:34PM0.29m | 10:55AM0.05m | 11:15PM0.29m | |||||||
— | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | |
— | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — | — | 5:45 | — | |
mm | 1 | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Temp °C | 20 | 24 | 22 | 18 | 19 | 20 | 17 | 18 | 18 | 17 | 21 | 22 | 18 | 24 | 26 | 22 | 21 | 20 | 19 |
Feels °C | 21 | 25 | 23 | 19 | 21 | 21 | 16 | 19 | 18 | 17 | 18 | 19 | 16 | 22 | 24 | 24 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | NE 6 | NE 6 | NE 6 | S 11 | S 10 | S 9 | S 9 | SSE 9 | S 12 | S 12 | S 11 | S 10 | S 10 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
58 | 37 | 85 | 59 | 43 | 146 | 94 | 85 | 83 | 151 | 110 | 134 | 82 | 34 | 18 | 202 | 134 | 96 | 91 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 13 | S 12 | S 11 | S 12 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | S 8 | SSE 8 | S 11 | — | S 8 | S 10 | S 10 | S 10 | S 10 |
61 | 78 | 97 | 116 | 99 | 38 | 38 | 25 | 41 | 33 | 51 | 7 | 114 | — | 1 | 8 | 8 | 8 | 8 | |
Swell 3 Height (m) Direction Period (s) | SSE 14 | — | ESE 8 | ESE 8 | S 10 | ESE 8 | S 5 | S 5 | SSE 5 | S 13 | SE 5 | — | — | — | — | — | S 10 | — | E 12 |
40 | — | 26 | 24 | 49 | 12 | 17 | 12 | 10 | 92 | 4 | — | — | — | — | — | 8 | — | 3 | |
Wind waves Height (m) Direction Period (s) | NE 5 | NE 6 | — | — | — | S 3 | — | — | — | ENE 7 | NE 5 | NE 5 | NE 6 | NE 7 | NE 7 | SW 3 | — | SSW 3 | S 4 |
37 | 72 | — | — | — | 2 | — | — | — | 86 | 47 | 102 | 160 | 284 | 306 | 2 | — | 4 | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 25 | 2 | 0 | 0 | 24 | 0 | 0 | 0 | 4 | 12 | 123 | 105 | 123 | 25 | 0 | 0 | 11 | 0 |
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.










