Surf Forecasts:
Rosa surf forecast from 27 Jul 2026:
- Best quality surf: Thursday 30 Jul, 12AM (local time) - 4.5ft (1.3m), 10s period, S swell with cross-offshore winds.
- Most powerful swell: Thursday 30 Jul, 12AM (local time) - 4.5ft (1.3m), 10s period, S swell with 314 kJ wave energy.
- Next surfable swell (1★+): Monday 27 Jul, 6AM (local time) - 3ft (0.9m), 8s period with ESE 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 Monday (Jul 27) at 6AM. The primary swell is predicted to be 0.6m and 12s period with a secondary swell of 0.9m and 8s. Another secondary swell of 0.9m 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 1.3m 10s and forecast to arrive on Thursday (Jul 30) at 12AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Sunday (Aug 02) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 27th Jul) | 3ft (0.9m) 8s |
| Best Surf | 12AM (Thu 30th Jul) | 4.5ft (1.3m) 10s |
| Most Powerful | 12AM (Thu 30th Jul) | 4.5ft (1.3m) 10s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer out at Rosa.
Right off the bat, we’ve got a bit of a slow start. There’s not much to get excited about for the first few days, but things start to build. The real standout window is looking like Tuesday the 4th of August, with a serious pulse of energy rolling in.
For the best bet, I’m pointing you to Rosa itself. This spot is exposed to the swell, and it’s fairly consistent. The real magic looks like it’s shaping up for the morning of Tuesday the 4th of August. The water temp is about average for this time of year, nothing crazy. We’ve got a clean, glassy morning with a 4ft swell coming from the south, with a 12-second period – that’s a nice, long groundswell. The wind is dead calm, which is a major win for clean faces. The combined energy is pumping at a solid 859 (moderate to strong), so there’s some real grunt behind it. This is the one to circle. The swell direction of S is a good match for the spot’s optimum from the SE. Keep in mind that with a longer period like that, Rosa might hold up better with a bit of shape, and it could be a bit walled up if it’s a beach break setup. Afternoon sees it jump up to 7ft, but with onshore wind, it’s a bit more of a handful.
Leading up to that, there’s a few windows. The morning of Thursday the 30th of July is clean but small, with a 3ft ENE swell and a short period of 7 seconds. The energy is weak (177). You’ll get a wave, but it won’t be the standout. The morning of Sunday the 2nd of August has a 5ft NE swell with clean conditions, but the period is a short 7 seconds, so it’ll be a bit fat and messy. The energy is moderate (373). The morning of Thursday the 6th of August sees a 6ft south swell, clean with cross-offshore wind, but the period is 10 seconds. The energy is strong (850). It’s a solid option, but the wind is a moderate 12 mph, so it’s not as perfect as the Tuesday morning.
After that Tuesday peak, it settles down. The morning of Saturday the 8th of August is another glassy, clean morning with a 4ft SSE swell, 10-second period, and moderate energy (314). A nice little drop-in. The following Tuesday morning, the 11th of August, sees a return of glassy conditions with a 3ft south swell, but the period is a short 7 seconds, so it’ll be a bit weak (229 energy).
Overall, the end of the first week and the start of the second week have the most promise. The stretch from the 4th to the 8th of August offers the best conditions, with the 4th being the clear winner. Don’t expect much in the final few days of the outlook; it gets pretty dire.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Sun night. Warm (max 24°C on Tue morning, min 17°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Sat afternoon, min 15°C on Wed night). Winds increasing (calm on Thu morning, fresh winds from the NNE by Sat morning). | ||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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 | ESE 8 | S 11 | ESE 8 | S 12 | S 12 | NE 7 | S 12 | S 11 | S 10 | SSE 7 | S 9 | S 13 | NE 7 | S 11 | NE 6 | NE 7 | NE 6 | NE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 105 | 103 | 92 | 61 | 75 | 97 | 63 | 98 | 112 | 314 | 61 | 111 | 90 | 112 | 123 | 131 | 246 | 239 | 195 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross | cross | cross | glassy | cross-off | cross | cross-off | cross-off | glassy | cross | cross-on | cross-on | cross | cross | cross | off |
High Tide | 11:51PM0.48m | 1:59PM0.63m | 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 | |||||||
Low Tide | 7:10AM0.06m | 8:07PM0.30m | 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 | |||||||
 |  |  |  | | | | | |  | |  | | | | | | | | |
 | — | 7:00 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — |
 | — | — | 5:42 | — | — | 5:42 | — | — | 5:43 | — | — | 5:43 | — | — | 5:44 | — | — | 5:45 | — |
mm | 2 | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 22 | 20 | 19 | 24 | 23 | 18 | 24 | 21 | 17 | 17 | 17 | 17 | 21 | 21 | 17 | 24 | 25 | 21 |
Feels °C | 20 | 23 | 20 | 19 | 24 | 24 | 19 | 26 | 20 | 15 | 17 | 17 | 17 | 19 | 19 | 15 | 21 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | NE 6 | NE 7 | NE 7 | ENE 7 | S 6 | SSE 7 | S 9 | S 9 | S 9 | S 11 | S 11 | S 11 | S 10 | ENE 7 |
| kJ | 105 | 96 | 75 | 58 | 37 | 73 | 63 | 63 | 56 | 68 | 58 | 111 | 78 | 52 | 123 | 84 | 36 | 18 | 138 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 12 | S 11 | S 11 | S 12 | S 12 | S 11 | S 12 | S 11 | S 10 | ENE 7 | ENE 7 | SE 8 | S 12 | SE 7 | SE 7 | SE 7 | SE 8 | S 10 |
| kJ | 84 | 103 | 92 | 61 | 75 | 97 | 57 | 98 | 112 | 121 | 61 | 62 | 49 | 106 | 18 | 8 | 2 | 2 | 8 |
Swell 3 Height (m) Direction Period (s) | ENE 7 | NE 4 | ENE 7 | SSE 14 | — | ESE 8 | ESE 8 | S 10 | ESE 8 | ENE 7 | S 9 | SSE 8 | S 13 | SE 7 | S 8 | — | E 11 | S 9 | E 10 |
| kJ | 10 | 12 | 5 | 40 | — | 37 | 24 | 49 | 12 | 53 | 58 | 50 | 90 | 27 | 1 | — | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | NE 4 | — | NE 4 | NE 4 | NE 6 | — | — | — | — | S 10 | — | — | ENE 7 | NE 7 | NE 5 | NE 6 | NE 7 | NE 6 | NE 7 |
| kJ | 19 | — | 7 | 24 | 60 | — | — | — | — | 314 | — | — | 66 | 112 | 115 | 131 | 246 | 239 | 195 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 0 | 12 | 23 | 25 | 2 | 0 | 0 | 24 | 0 | 0 | 0 | 3 | 2 | 71 | 62 | 63 | 284 | 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.
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