Surf Forecasts:
Rosa surf forecast from 18 Jul 2026:
- Best quality surf: Monday 20 Jul, 9AM (local time) - 7ft (2.2m), 8s period, NE swell with offshore winds.
- Most powerful swell: Saturday 18 Jul, 9PM (local time) - 7ft (2.2m), 9s period, NE swell with 730 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 9AM (local time) - 7ft (2.2m), 8s 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 Monday (Jul 20) at 9AM. The primary swell is predicted to be 2.2m and 8s period with a secondary swell of 1.7m and 8s. Another secondary swell of 0.2m and 12s 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 2.2m 9s and forecast to arrive on Saturday (Jul 18) at 9PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Thursday (Jul 23) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Mon 20th Jul) | 7ft (2.2m) 8s |
| Best Surf | 9AM (Mon 20th Jul) | 7ft (2.2m) 8s |
| Most Powerful | 9PM (Sat 18th Jul) | 7ft (2.2m) 9s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Hey, Rusty here. Let’s talk about what’s on the cards for Rosa over the next couple of weeks. The water is unusually cold—60.8°F with a big anomaly of -4.9°F, so that’s seriously chilly for this time of year. The first few days are a bit of a write‑off with cross‑shore winds and choppy conditions, but we’ve got a couple of clean windows that are worth getting excited about.
Saturday 18th and Sunday 19th are messy—cross‑onshore winds, poor surf, not worth saddling up. Monday 20th morning is the first real glimmer: glassy conditions, 7.2ft of NE swell, period 8 seconds, and the combined energy sitting at 1058 (moderate to strong). That’s a solid sized wave for an intermediate, but the swell direction is NE, not the preferred SE, so it mightn’t line up perfectly. Still, glassy and clean—definitely a session to consider.
Tuesday 21st morning is glassy again but smaller, 4.9ft ENE. Wednesday 22nd afternoon turns glassy after a rainy morning, 4.3ft ENE. Thursday 23rd sees clean cross‑offshore winds but size remains modest. Then Friday 24th is the real standout. Friday afternoon delivers glassy, dead calm conditions with 4.6ft of SE swell, period 8 seconds, combined energy 376. That swell direction is bang on the optimum for Rosa, so expect those
Short Range ForecastMostly dry. Warm (max 27°C on Sun morning, min 19°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 43mm), heaviest during Wed morning. Warm (max 20°C on Tue afternoon, min 14°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | ||||||||||||||
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) | ENE 8 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 9 | SSE 9 | SSE 9 | SSE 9 | SE 8 | SE 8 | SE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 554 | 639 | 528 | 378 | 467 | 619 | 365 | 368 | 294 | 237 | 223 | 192 | 212 | 263 | 322 | 453 | 454 | 319 | 232 | 173 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-on | cross | off | cross-on | cross | cross-off | glassy | glassy | cross | glassy | cross-off | cross-off | cross-off | cross-off | off | glassy | cross |
High Tide | 4:10PM0.48m | 9:45PM0.42m | 3:44AM0.65m | 4:34PM0.48m | 10:51PM0.37m | 4:30AM0.61m | 5:03PM0.49m | 11:38PM0.34m | 5:20AM0.55m | 5:36PM0.48m | 00:06AM0.32m | 6:20AM0.48m | 12:23PM0.43m | 6:14PM0.46m | 7:50AM0.43m | 12:58PM0.49m | 7:05PM0.43m | 1:24PM0.54m | 8:37PM0.41m | |
Low Tide | 7:14PM0.38m | 12:07PM0.16m | 8:06PM0.32m | 9:37AM0.29m | 12:54PM0.25m | 8:55PM0.29m | 9:28AM0.34m | 1:52PM0.33m | 9:43PM0.28m | 9:39AM0.38m | 3:06PM0.38m | 10:32PM0.29m | 3:17AM0.26m | 4:35PM0.40m | 11:47PM0.32m | 4:29AM0.21m | 5:59PM0.38m | |||
 |  | | |  |  | | | | |  |  |  |  |  |  | | | | | |
 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — |
 | 5:37 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:38 | — | — | 5:39 | — | — | 5:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | 19 | 18 | 3 | 2 | — | 1 | — | — | — | — |
Temp °C | 26 | 20 | 27 | 27 | 20 | 21 | 22 | 21 | 19 | 20 | 19 | 20 | 18 | 18 | 18 | 18 | 15 | 18 | 18 | 16 |
Feels °C | 24 | 19 | 24 | 24 | 18 | 22 | 22 | 20 | 20 | 22 | 20 | 21 | 20 | 18 | 16 | 16 | 14 | 18 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SSE 16 | ENE 9 | ENE 8 | S 13 | S 12 | ENE 8 | S 11 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 9 | SSE 9 | SSE 9 | SSE 9 | SE 8 | SE 8 | SE 8 |
| kJ | 26 | 465 | 348 | 13 | 11 | 403 | 10 | 368 | 294 | 237 | 223 | 192 | 212 | 263 | 322 | 453 | 454 | 319 | 232 | 173 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | S 15 | S 13 | — | — | S 12 | — | S 11 | S 10 | S 9 | S 9 | S 8 | S 8 | NE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 9 | 38 | 31 | — | — | 10 | — | 9 | 51 | 87 | 78 | 89 | 138 | 158 | 141 | 141 | 119 | 80 | 80 | 76 |
Swell 3 Height (m) Direction Period (s) | S 13 | SE 9 | S 8 | — | — | — | — | — | — | — | S 15 | S 14 | S 12 | N 5 | — | — | S 11 | S 11 | S 11 | S 10 |
| kJ | 3 | 3 | 1 | — | — | — | — | — | — | — | 4 | 4 | 3 | 34 | — | — | 38 | 55 | 55 | 68 |
Wind waves Height (m) Direction Period (s) | ENE 8 | NE 9 | NE 8 | NE 8 | NE 8 | NE 8 | ENE 8 | N 4 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 554 | 639 | 528 | 378 | 467 | 619 | 365 | 31 | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 47 | 2 | 23 | 23 | 2 | 25 | 0 | 2 | 0 | 0 | 4 | 0 | 2 | 0 | 0 | 2 | 2 | 0 | 0 | 0 |
Best forecast wave conditions in Santa Catarina - Sul | ||||||||||||||||||||
Best forecast wave conditions in Brazil | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Rosa surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest