Surf Forecasts:
Rosa surf forecast from 14 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 3PM (local time) - 5.5ft (1.7m), 9s period, ENE swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 3PM (local time) - 7ft (2.2m), 13s period, SSE swell with 1,605 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 3PM (local time) - 5.5ft (1.7m), 9s period with ENE 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 (Aug 18) at 3PM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.2m and 10s. Another secondary swell of 0.3m and 10s 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 2.2m 13s and forecast to arrive on Friday (Aug 14) at 3PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Tue 18th Aug) | 5.5ft (1.7m) 9s |
| Best Surf | 3PM (Tue 18th Aug) | 5.5ft (1.7m) 9s |
| Most Powerful | 3PM (Fri 14th Aug) | 7ft (2.2m) 13s |
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 Rosa has in store for us over the next couple of weeks. To be straight with you, the first week is a bit of a write-off for clean, quality surfing. We’ve got some size at times, but the wind just won’t play ball, churning things up with a lot of cross and cross-onshore chop. Hold tight, because there’s a standout window later on that looks the goods.
We kick off this Friday the 14th with some swell on the way. Morning sees a 6 ft SSE swell at 13 seconds, with 6 mph east winds. It’s not totally blown out, but with cross-on conditions the surf is messy and hard to read. The swell builds in the arvo to 8 ft from the same direction, but that ENE breeze swings cross-on and it’s choppy. Combined energy is strong at 2646, but the quality is missing.
Saturday the 15th stays messy. Cross-on NE winds keep a 5 ft SSE swell ragged in the morning, and it gets worse into the arvo as the wind picks up to 9 mph, with swell jumping to 7 ft but dropping to a short 8 second period. That’s a junky, powerless wave. Sunday through Tuesday is more of the same – moderate cross-shore winds, bumpy surfaces, and a 7 ft to 8 ft ENE/NE swell with short 8 second periods. Not much to get excited about. The combined energy is moderate to strong (from 597 up to 979) but it’s all for the kites, not surfers.
There is a few slivers of hope in the latter part of next week. On Friday the 21st, we get a brief moment of calm. A small 4 ft ENE swell pushes in with glassy conditions and easterly winds at 3 mph. That’s a clean, if small, morning. Then on Saturday the 22nd, the morning looks promising with a light cross-off breeze from the SW at 6 mph. The swell is still small at 4 ft, but it’ll be clean and rideable for the logs and mid-lengths.
Now, this is the standout. Mark Monday the 24th and Tuesday the 25th in your calendar. We get a new S swell arriving. Monday morning has a 5 ft S swell with a nice 12 second period, and the wind is a light cross-off from the SW at 6 mph. The afternoon cleans up even more with the breeze dropping to 3 mph. The combined energy at 873 is moderate, but with that direction and period, the waves will have proper push and shape. This is for the reefs and points if you’ve got them. Tuesday the 25th is a beaut – glassy conditions with a light NNW breeze and a 3 ft S swell at 11 seconds. Perfect conditions for a dawn session. The water temp is around 66°, which is about average for this time of year.
After that, the surf drops right off. Wednesday the 26th and Thursday the 27th offer small glassy windows, but it’s a tail-off into the second weekend. The swell from the 28th and 29th is tiny and messy. That window of Monday and Tuesday next week is your best bet.
Rusty
Short Range ForecastHeavy rain (total 47mm), heaviest during Fri night. Warm (max 20°C on Sun morning, min 16°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 31°C on Tue morning, min 18°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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) | SSE 13 | SSE 13 | S 12 | SSE 12 | S 11 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | NE 8 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph | |||||||||||||||||||||
1249 | 1605 | 870 | 541 | 351 | 636 | 439 | 480 | 583 | 601 | 698 | 798 | 486 | 465 | 311 | 223 | 248 | 215 | 147 | 147 | 163 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | glassy | glassy | cross | cross-on | cross-off | cross-on | cross | glassy |
High Tide | 2:58PM0.55m | 2:13AM0.70m | 3:07PM0.54m | 2:51AM0.70m | 3:26PM0.54m | 3:30AM0.67m | 3:49PM0.55m | 4:12AM0.62m | 4:15PM0.54m | 4:57AM0.55m | 12:02PM0.42m | 5:50AM0.48m | 12:30PM0.49m | 00:33AM0.28m | |||||||
Low Tide | 9:35AM-0.04m | 9:48PM0.34m | 10:10AM0.04m | 10:06PM0.32m | 10:44AM0.13m | 7:53PM0.28m | 11:16AM0.24m | 8:20PM0.22m | 8:42AM0.31m | 8:52PM0.20m | 8:49AM0.34m | 1:09PM0.41m | 9:25PM0.21m | 8:57AM0.38m | 2:56PM0.45m | 9:57PM0.24m | |||||
6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:43 | — | — | 6:43 | — | — | 6:41 | — | — | 6:41 | — | — | |
— | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — | — | 5:53 | — | |
mm | 4 | 7 | 27 | 4 | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 17 | 18 | 18 | 18 | 20 | 20 | 19 | 24 | 24 | 19 | 31 | 28 | 20 | 31 | 31 | 24 | 18 | 17 | 16 |
Feels °C | 16 | 17 | 16 | 18 | 18 | 17 | 19 | 18 | 17 | 22 | 23 | 19 | 31 | 31 | 22 | 30 | 30 | 24 | 18 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | SSE 13 | SSE 13 | S 12 | SSE 12 | ESE 8 | SSE 11 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | ENE 9 | ENE 9 | S 10 | ENE 9 | ENE 8 | S 7 | SSE 8 | ENE 7 | ENE 7 | ENE 8 |
1249 | 1605 | 870 | 541 | 204 | 191 | 141 | 108 | 80 | 33 | 19 | 604 | 486 | 7 | 311 | 223 | 69 | 60 | 147 | 147 | 163 | |
Swell 2 Height (m) Direction Period (s) | ESE 7 | — | — | — | S 11 | — | E 14 | E 13 | — | S 10 | SE 8 | SSE 11 | S 10 | S 10 | S 9 | S 8 | SE 13 | SE 13 | S 5 | SSW 7 | S 7 |
210 | — | — | — | 351 | — | 14 | 14 | — | 51 | 3 | 22 | 8 | 17 | 6 | 29 | 7 | 7 | 45 | 73 | 103 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 13 | SE 12 | — | — | SE 7 | SE 12 | ESE 4 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 6 | — | — | 22 | 6 | 2 | |
Wind waves Height (m) Direction Period (s) | — | E 7 | E 7 | E 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 9 | — | ENE 9 | — | — | ENE 8 | NE 8 | — | SE 6 | — |
— | 152 | 341 | 321 | 204 | 636 | 439 | 480 | 583 | 601 | 698 | 798 | — | 465 | — | — | 248 | 215 | — | 30 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 2 | 2 | 2 | 2 | 25 | 25 | 2 | 284 | 25 | 2 | 47 | 25 | 0 | 0 | 2 | 2 | 0 | 2 | 7 | 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.











