
Surf Forecasts:
Rosa surf forecast from 1 Aug 2026:
- Best quality surf: Sunday 2 Aug, 6AM (local time) - 6ft (1.8m), 7s period, NE swell with offshore winds.
- Most powerful swell: Friday 7 Aug, 6PM (local time) - 5.5ft (1.7m), 9s period, S swell with 440 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 6AM (local time) - 6ft (1.8m), 7s period with NE 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 (Aug 02) at 6AM. The primary swell is predicted to be 1.8m and 7s period with a secondary swell of 1.4m and 7s. Another secondary swell of 0.1m and 10s is also forecast. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Rosa in the next 16 days are 1.7m 9s and forecast to arrive on Friday (Aug 07) at 6PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 5s period and expected on Friday (Aug 07) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 2nd Aug) | 6ft (1.8m) 7s |
| Best Surf | 6AM (Sun 2nd Aug) | 6ft (1.8m) 7s |
| Most Powerful | 6PM (Fri 7th Aug) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright folks, it's Rusty here. Gotta say, the next couple of weeks are a mixed bag, a bit of patience needed. But there’s some solid juice on the horizon. Water’s about normal for the season, sitting around 66°F, so a 3/2 or a spring suit will work.
The first few days are pretty much a write-off. Saturday and Sunday, we've got weak, short-period windswell from the NE, all chopped up by cross and onshore winds. Energy readings are low (138–213). Not worth getting wet for anything other than a workout.
Monday’s similar, small and junky. Then Tuesday afternoon starts to show some promise. Wind drops to glass, and we get a touch of longer-period S swell, around 11 seconds. It’s small, around 3ft, but the energy bumps up to 347. That’s a fun little clean wave for the logs and fishes at Rosa. Wednesday morning stays clean with a light offshore, even though there’s a bit of rain about.
Then we go quiet again for a bit. Thursday’s back to poor, with a cross-shore chop. Friday picks up some size– up to 5-6ft from the S– but the morning’s choppy. The afternoon saves it though, wind goes glassy and we get 1.7m (5-6ft) of S swell at 8 seconds. That’ll be a fun, crumbly session, energy at 438.
Saturday the 8th is where things start to fire. Morning’s clean at 1.2m (4ft), but the afternoon is the standout: 2.5m (8ft) of S swell, light winds, clean faces. Energy is cranking at 1031. This is for the experienced crew, and Rosa will have some proper walls.
Sunday the 9th holds size, 2.1m (7ft) with a longer 10-second period. Morning is clean, afternoon gets windier. Energy stays heavy at 923. Solid, but that Saturday afternoon is the pick of the weekend.
The following week brings a bigger system, but it’s a bit messier. Monday the 10th has 2.1m (7ft) in the morning with offshore winds, but the energy’s going off (1627) and the conditions are a bit tricky. Afternoon jumps to 2.5m (8ft) but is cross-on and lumpy. Not ideal.
Tuesday the 11th sees the swell peak in size, up to 2.5m (8ft+), but with a very long 14-second period. That’s proper groundswell, big and powerful. But winds are cross-shore, messing up the face. Energy is off the charts (2712), but at Rosa that size and period will be too heavy and sectiony for most. Experts only.
Then it eases down through Wednesday and Thursday, dropping to 1.5m (5ft) or so on Wednesday. Winds remain cross-shore, average conditions.
Friday the 14th morning looks like another decent little window. 1.5m (5ft) of S swell with a 10-second period, and the wind is offshore. Clean, with energy at 550. Good session for those who can dodge the crowd.
The weekend brings a big, powerful pulse. Saturday the 15th has a massive 3.0m (10ft) of S swell. That’s just too big for Rosa, and the forecast even says so. The morning wind is calm, but the size will be closing out and dangerous. Sunday the 16th is still significant, 2.3m (7-8ft) with a 12-second period. Morning wind is offshore, energy is solid at 1709. The afternoon gets a bit wild with 25km/h cross-shore winds, but the morning could be an epic, if demanding, session for experts only.
So, bottom line: the best bets are Saturday the 8th afternoon, and Sunday the 16th morning as a long-range promise. Also, keep an eye on Tuesday the 4th afternoon and Friday the 14th morning for some clean, smaller waves. Know your limits, stay safe, and enjoy the ride.
This is Rusty, out.
Short Range ForecastMostly dry. Warm (max 23°C on Sat morning, min 16°C on Sun afternoon). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Wed morning. Warm (max 24°C on Tue morning, min 17°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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) | NE 6 | NE 6 | NE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | NE 7 | NE 7 | S 12 | S 11 | S 11 | SSE 10 | ENE 7 | ENE 7 | ENE 8 | NE 7 | ENE 8 | S 8 | S 8 | S 9 |
Wave Graph | |||||||||||||||||||||
99 | 193 | 284 | 202 | 169 | 138 | 117 | 160 | 136 | 213 | 244 | 181 | 133 | 104 | 89 | 101 | 176 | 67 | 362 | 390 | 375 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-off | cross-on | glassy | cross-on | cross-on | cross | cross | glassy | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | cross | glassy | cross |
High Tide | 3:47PM0.62m | 3:22AM0.68m | 4:15PM0.59m | 4:00AM0.66m | 4:45PM0.55m | 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 | ||||||
Low Tide | 10:14AM0.00m | 10:34PM0.29m | 10:55AM0.05m | 11:15PM0.29m | 11:45AM0.12m | 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 | ||||
6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:54 | — | — | 6:54 | — | — | 6:52 | — | — | 6:52 | — | — | |
— | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:45 | — | — | 5:46 | — | — | 5:46 | — | — | 5:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 12 | — | — | — | — | — | 1 | — | — |
Temp °C | 23 | 22 | 18 | 18 | 19 | 16 | 22 | 23 | 20 | 24 | 23 | 20 | 18 | 19 | 18 | 24 | 23 | 20 | 25 | 23 | 21 |
Feels °C | 20 | 19 | 16 | 17 | 19 | 18 | 21 | 22 | 20 | 26 | 25 | 21 | 20 | 20 | 18 | 25 | 24 | 22 | 28 | 25 | 22 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 10 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | S 13 | S 12 | ENE 7 | S 11 | S 11 | ENE 7 | SSE 10 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 8 | S 8 | S 9 |
34 | 18 | 8 | 202 | 169 | 138 | 117 | 31 | 74 | 88 | 244 | 181 | 71 | 100 | 89 | 101 | 129 | 67 | 47 | 390 | 375 | |
Swell 2 Height (m) Direction Period (s) | SE 9 | E 11 | S 8 | S 10 | S 10 | SSW 4 | S 15 | ESE 12 | SE 11 | S 12 | ENE 7 | ENE 7 | SSE 10 | S 12 | SSE 9 | S 9 | SSE 9 | SSE 11 | — | ENE 8 | ENE 8 |
3 | 2 | 1 | 2 | 2 | 2 | 17 | 14 | 31 | 213 | 75 | 63 | 133 | 3 | 66 | 57 | 42 | 24 | — | 48 | 52 | |
Swell 3 Height (m) Direction Period (s) | E 11 | — | — | — | — | S 9 | SSW 4 | SSW 6 | S 6 | SE 11 | SE 10 | ESE 10 | ESE 11 | E 11 | S 11 | SE 14 | SSE 13 | N 4 | — | — | — |
2 | — | — | — | — | 2 | 2 | 3 | 3 | 30 | 28 | 11 | 12 | 2 | 9 | 7 | 16 | 1 | — | — | — | |
Wind waves Height (m) Direction Period (s) | NE 6 | NE 6 | NE 7 | — | S 3 | — | — | NE 7 | NE 7 | NNW 4 | — | — | — | ENE 7 | N 4 | N 4 | NE 7 | S 8 | S 8 | — | NNE 3 |
99 | 193 | 284 | — | 1 | — | — | 160 | 136 | 7 | — | — | — | 104 | 6 | 22 | 176 | 51 | 362 | — | 2 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 71 | 284 | 25 | 24 | 11 | 0 | 6 | 2 | 2 | 4 | 0 | 0 | 0 | 12 | 3 | 3 | 2 | 3 | 25 | 0 | 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.











