Surf Forecasts:
Rosa surf forecast from 10 Aug 2026:
- Best quality surf: Monday 10 Aug, 6PM (local time) - 8ft (2.4m), 12s period, S swell with cross-offshore winds.
- Most powerful swell: Tuesday 11 Aug, 3AM (local time) - 8ft (2.4m), 12s period, S swell with 1,721 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 6PM (local time) - 8ft (2.4m), 12s 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 Monday (Aug 10) at 6PM. The primary swell is predicted to be 2.4m and 12s period with a secondary swell of 0.5m and 9s. 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 2.4m 12s and forecast to arrive on Tuesday (Aug 11) at 3AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 6s period and expected on Friday (Aug 14) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Mon 10th Aug) | 8ft (2.4m) 12s |
| Best Surf | 6PM (Mon 10th Aug) | 8ft (2.4m) 12s |
| Most Powerful | 3AM (Tue 11th Aug) | 8ft (2.4m) 12s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright mate, here’s the lowdown at Rosa for the next couple weeks. The water’s about 67°F, which is normal for this time of year, not too warm, not too cold.
Monday the 10th kicks off with S swell at 7ft, cross-off wind, and a combined energy of 1728 (moderate) – it’s got punch but it’s a bit bumpy. Later Monday arvo the swell pumps to 8ft S, still cross-off, that’s a heavy wave.
Tuesday the 11th mornin’ is the real standout – glassy, 7ft S swell with a 12-second period. Energy’s 1303 (moderate). Clean, solid, and for the experienced only. Crowds might pop up, but it’s worth it.
Wednesday the 12th drops to 6ft–6ft S, cross-shore winds and some rain – still rideable but not perfect. Thursday the 13th comes back strong: 6ft–7ft S/SSE, 14-second period, light cross-off. That’s a proper groundswell, long period – excellent shape and power.
Friday the 14th is glassy all day, 6ft S, 13-second period. Energy around 1121–1153 (moderate). A top session for anyone with the skills.
Then it goes south. Saturday the 15th drops to 4ft with cross-shore and t-storms, Sunday the 16th is onshore slop at 5ft–4ft, poor. Monday the 17th has tiny 4ft ENE swell with glassy conditions but weak energy at 281. Tuesday the 18th has a fresh cross-off but 6ft S swell and poor quality. Wednesday the 19th through Thursday the 20th is all cross-shore junk, small swell, energy in the 300–400 range (weak). Not worth it.
Friday the 21st mornin’ has a tiny 4ft ENE with clean conditions, but low energy. Saturday the 22nd and Sunday the 23rd are mixed – some clean windows but small. Monday the 24th is poor cross-onshore with 6ft S swell, messy. Tuesday the 25th finishes with 6ft S cross-onshore and choppy.
So the pick is Tuesday the 11th mornin’ – glassy, solid, and clean. Thursday the 13th and Friday the 14th are also crackers for the experienced. After that, it’s a long stretch of small and messy, with only a few glassy windows for the longboard or foamy crowd.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Wed morning. Very mild (max 16°C on Wed night, min 12°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 44mm), heaviest during Thu night. Warm (max 23°C on Sat afternoon, min 17°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | SSE 14 | S 13 | SSE 13 | S 13 | SSE 13 | S 12 | S 11 | S 11 | S 10 | E 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1129 | 1999 | 1665 | 1277 | 1122 | 1175 | 1027 | 841 | 855 | 1428 | 1440 | 1230 | 1003 | 1011 | 672 | 369 | 338 | 225 | 240 | 190 | 233 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | glassy | cross | cross | cross | cross | cross | cross-off | cross-off | cross | glassy | glassy | cross | cross | cross | cross | cross-on | cross-on | cross |
High Tide | 2:42PM0.76m | 00:31AM0.44m | 3:20PM0.73m | 00:37AM0.52m | 3:50PM0.67m | 1:04AM0.60m | 3:20PM0.59m | 1:37AM0.66m | 2:58PM0.55m | 2:13AM0.70m | 3:07PM0.54m | 2:51AM0.70m | 3:26PM0.54m | ||||||||
Low Tide | 8:11PM0.30m | 7:35AM-0.05m | 8:37PM0.33m | 8:17AM-0.09m | 9:02PM0.35m | 8:57AM-0.08m | 9:26PM0.35m | 9:35AM-0.04m | 9:48PM0.34m | 10:10AM0.04m | 10:06PM0.32m | 10:44AM0.13m | 7:53PM0.28m | ||||||||
 |  |  |  |  |  | | | |  | |  | |  |  | |  | | | | | |
 | 6:50 | — | — | 6:48 | — | — | 6:48 | — | — | 6:48 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — |
 | — | 5:49 | — | — | 5:50 | — | — | 5:50 | — | — | 5:51 | — | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | 1 | 1 | 4 | 1 | — | 2 | 4 | 13 | 4 | 6 | 6 | 3 | 3 | 3 | 4 | — | — |
Temp °C | 14 | 14 | 12 | 14 | 13 | 12 | 14 | 15 | 16 | 17 | 17 | 17 | 18 | 19 | 19 | 22 | 23 | 20 | 20 | 20 | 20 |
Feels °C | 9 | 9 | 9 | 13 | 11 | 10 | 13 | 14 | 16 | 17 | 18 | 18 | 20 | 21 | 21 | 21 | 22 | 20 | 20 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | S 12 | SSE 14 | S 13 | SSE 13 | S 13 | SSE 13 | S 12 | SE 8 | S 11 | ESE 8 | E 8 | E 8 | E 8 |
| kJ | 1129 | 1569 | 1665 | 1277 | 1122 | 1175 | 1027 | 841 | 855 | 1428 | 1440 | 1230 | 1003 | 1011 | 672 | 196 | 291 | 133 | 240 | 190 | 233 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | — | NE 5 | NE 5 | NE 6 | SE 7 | SE 7 | SE 8 | S 11 | S 11 | S 10 | S 10 | S 10 | S 10 |
| kJ | 22 | 30 | 39 | 26 | 12 | 11 | 5 | 5 | — | 21 | 14 | 16 | 100 | 118 | 113 | 369 | 338 | 225 | 164 | 130 | 96 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NE 8 | — | — | — | — | — | — | NE 8 | NE 6 | — | E 9 | ENE 7 | — | NE 7 | E 13 | NE 7 | E 13 |
| kJ | — | — | — | — | 16 | — | — | — | — | — | — | 3 | 18 | — | 6 | 62 | — | 93 | 14 | 42 | 13 |
Wind waves Height (m) Direction Period (s) | SSW 9 | S 12 | — | — | — | — | NNE 3 | NNE 4 | NE 5 | — | — | NE 6 | — | NE 6 | NE 5 | — | E 8 | N 4 | NE 7 | NE 7 | — |
| kJ | 577 | 1999 | — | — | — | — | 7 | 22 | 35 | — | — | 16 | — | 24 | 26 | — | 282 | 12 | 97 | 75 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 24 | 0 | 0 | 4 | 4 | 4 | 4 | 25 | 0 | 0 | 4 | 0 | 0 | 4 | 2 | 39 | 25 | 2 | 2 | 23 |
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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