
Surf Forecasts:
Rosa surf forecast from 8 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 6AM (local time) - 10ft (3.0m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 6AM (local time) - 10ft (3.0m), 9s period, E swell with 1,652 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 12AM (local time) - 3ft (0.9m), 10s period with SSE 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 Wednesday (Sep 09) at 12AM. The primary swell is predicted to be 0.9m and 10s period with a secondary swell of 1.2m and 7s. 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 3.0m 9s and forecast to arrive on Tuesday (Sep 15) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12AM (Wed 9th Sep) | 3ft (0.9m) 10s |
| Best Surf | 6AM (Tue 15th Sep) | 10ft (3.0m) 9s |
| Most Powerful | 6AM (Tue 15th Sep) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Rosa over the next 16 days.
The Lowdown
Alright, let’s look at the Rosa area for the next couple weeks. It’s a bit of a mixed deal. Starts off small and bumpy, but there’s a couple of real standouts in there. Circle Sunday the 13th and Tuesday the 22nd – those are your best bets.
So, Tuesday morning the 8th kicks things off and it’s a bit of a letdown at Rosa. You got a 5ft SSE swell, but the wind’s cross, and the energy’s moderate (445). Water temps are about 64°, nothing unusual. That afternoon gets worse with a 4ft onshore slop. No good.
Wednesday the 9th morning is a total turnaround. Swell drops to a cleaner 4ft from the south, but the wind is dead calm – glassy as a mirror. Energy’s moderate at 646, but with those conditions, it’ll be a joy. Afternoon turns a little cross-on, but still rideable if you’re keen.
Thursday the 10th is a step down. Morning has a small 3ft S swell with a nice 12-second period, but the cross-breeze messes it up. Energy’s moderate (552), but it’s nothing special. Friday the 11th is a write-off – messy NE wind and a 4ft NE swell. Forget it.
Saturday the 12th we start to see some real size. An 8ft S swell rolls in, and the wind is clean cross-off. Energy is strong at 1072, but the morning gets a “marginal” tag – size and tides likely. Leave it for the big-wave guys.
Then we get the first real standout: Sunday the 13th. This is the pick of the first week. Morning has a clean 7ft SSE swell with a light offshore cross-off breeze from the SW. Energy is moderate at 746, but clean. The afternoon is the real gem. Swell bumps to 7ft from the SSE, still cross-off, and the energy surges to a very strong 1255. Called “excellent for experienced surfers” – and I’d agree. The 9-second period isn’t crazy long, but with that power and clean wind, it’ll be firing.
Monday the 14th is trash – onshore gusts and a 7ft east swell. Move on.
Tuesday the 15th gets huge – 10ft from the east, but the notes say it’s too big for Rosa. Energy is massive at 2751. That’s a kite day or a battle.
Wednesday the 16th settles to a more manageable 5ft from the ESE, with clean cross-off wind in the morning. Moderate energy (636). Solid for anyone who missed Sunday.
Then we hit a flat spell. Thursday the 17th through Saturday the 19th is mostly small, choppy, and cross-on. There’s a slight hope on Saturday the 19th morning with a 7ft ENE swell and clean cross-off wind, but the energy is moderate (610) and period short (8 seconds) – lumpy.
Then the second true standout: Tuesday the 22nd. This is the best forecast of the entire run. Morning has a 7ft S swell with a long 13-second period and glassy, light offshore wind. Energy is very strong at 1697. “Excellent for experienced surfers.” That’s groundswell power. Afternoon is even better – 7ft S swell, 14-second period, and dead glass again (1828 energy). This one is for the crew.
Wednesday the 23rd fades to small, poor onshore junk.
So, if you can, make it for Sunday the 13th afternoon or Tuesday the 22nd. The rest is filler or gaps of a few days with nothing.
Rusty
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 22°C on Thu afternoon, min 15°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 35mm), heaviest during Fri afternoon. Warm (max 26°C on Fri afternoon, min 14°C on Sat night). Winds decreasing (fresh winds from the SSW on Fri night, calm by Sun afternoon). | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
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 10 | S 9 | SSE 10 | ENE 8 | S 12 | ENE 8 | S 12 | S 14 | S 13 | NE 8 | NE 8 | NE 8 | S 9 | S 10 | SSE 9 | SSE 9 | SSE 9 | SSE 10 | E 7 | ESE 8 | E 8 |
Wave Graph | |||||||||||||||||||||
428 | 217 | 180 | 290 | 330 | 211 | 229 | 503 | 268 | 178 | 250 | 181 | 992 | 1109 | 705 | 692 | 831 | 741 | 462 | 630 | 816 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-off | glassy | cross-on | glassy | cross | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | on | on | cross-on | cross-on |
High Tide | 2:19PM0.73m | 00:15AM0.51m | 2:42PM0.68m | 00:26AM0.59m | 2:32PM0.61m | 00:53AM0.66m | 2:04PM0.57m | 1:26AM0.71m | 2:08PM0.57m | 2:01AM0.72m | 2:24PM0.58m | 2:37AM0.71m | 2:45PM0.58m | ||||||||
Low Tide | 7:29PM0.31m | 7:13AM-0.06m | 7:51PM0.30m | 7:52AM-0.07m | 8:15PM0.28m | 8:29AM-0.03m | 8:38PM0.26m | 9:03AM0.03m | 8:57PM0.23m | 9:35AM0.12m | 9:05PM0.20m | 10:03AM0.22m | 8:01PM0.17m | ||||||||
6:20 | — | — | 6:18 | — | — | 6:18 | — | — | 6:16 | — | — | 6:16 | — | — | 6:15 | — | — | 6:13 | — | — | |
— | 6:02 | — | — | 6:04 | — | — | 6:04 | — | — | 6:05 | — | — | 6:05 | — | — | 6:06 | — | — | 6:06 | — | |
mm | — | — | — | — | — | 1 | — | — | — | 1 | 14 | — | — | — | 1 | — | 1 | 18 | 6 | 11 | 11 |
Temp °C | 20 | 20 | 17 | 20 | 19 | 17 | 20 | 22 | 20 | 25 | 26 | 20 | 17 | 17 | 15 | 14 | 15 | 16 | 15 | 15 | 16 |
Feels °C | 18 | 17 | 17 | 20 | 19 | 18 | 21 | 24 | 22 | 25 | 25 | 21 | 12 | 12 | 12 | 13 | 14 | 14 | 12 | 12 | 15 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | S 9 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 14 | ENE 8 | S 12 | S 11 | NE 8 | ENE 8 | ENE 8 | SSE 9 | SSE 9 | SSE 9 | SSE 10 | SE 8 | ESE 8 | E 8 |
428 | 217 | 132 | 270 | 291 | 211 | 181 | 503 | 170 | 134 | 90 | 181 | 69 | 54 | 705 | 692 | 831 | 741 | 281 | 630 | 816 | |
Swell 2 Height (m) Direction Period (s) | ENE 7 | SE 12 | SSE 10 | S 10 | S 12 | S 10 | S 12 | SE 7 | S 13 | E 13 | ESE 13 | E 12 | E 12 | SE 12 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 7 | S 10 | S 10 |
11 | 68 | 180 | 290 | 330 | 138 | 229 | 2 | 268 | 13 | 17 | 12 | 11 | 6 | 73 | 54 | 57 | 54 | 159 | 149 | 116 | |
Swell 3 Height (m) Direction Period (s) | E 9 | S 16 | S 9 | SSE 10 | SE 9 | S 12 | SSE 16 | E 14 | E 14 | E 13 | S 6 | E 12 | — | — | — | — | — | S 12 | S 10 | SSE 10 | SSE 9 |
6 | 5 | 41 | 86 | 22 | 113 | 142 | 4 | 4 | 13 | 3 | 12 | — | — | — | — | — | 26 | 234 | 35 | 8 | |
Wind waves Height (m) Direction Period (s) | — | ENE 6 | — | — | — | — | — | ENE 8 | N 5 | NE 8 | NE 8 | SSW 11 | S 9 | S 10 | — | — | SE 8 | — | E 7 | — | — |
— | 52 | — | — | — | — | — | 183 | 36 | 178 | 250 | 156 | 992 | 1109 | — | — | 367 | — | 462 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 12 | 0 | 0 | 2 | 0 | 2 | 2 | 0 | 2 | 232 | 29 | 80 | 24 | 2 | 0 | 0 | 25 | 558 | 2 | 2 |
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.










