
Surf Forecasts:
Siriu surf forecast from 4 Jul 2026:
- Best quality surf: Saturday 4 Jul, 9AM (local time) - 6.5ft (2.0m), 12s period, S swell with cross-offshore winds.
- Most powerful swell: Saturday 4 Jul, 12PM (local time) - 7.5ft (2.3m), 12s period, SSE swell with 1,413 kJ wave energy.
- Next surfable swell (1★+): Saturday 4 Jul, 9AM (local time) - 6.5ft (2.0m), 12s period with S swell.
Best Forecast Surf Conditions for Siriu this week:
The surf forecast for Siriu over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Jul 04) at 9AM. The primary swell is predicted to be 2.0m and 12s period with a secondary swell of 0.4m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Siriu in the next 16 days are 2.3m 12s and forecast to arrive on Saturday (Jul 04) at 12PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 10s period and expected on Saturday (Jul 04) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Sat 4th Jul) | 6.5ft (2.0m) 12s |
| Best Surf | 9AM (Sat 4th Jul) | 6.5ft (2.0m) 12s |
| Most Powerful | 12PM (Sat 4th Jul) | 7.5ft (2.3m) 12s |
Table - best surf conditions forecast for Siriu over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, this is Rusty, and I’m looking at the surf for the next couple of weeks. It’s a bit of a slow start, but there’s some real potential brewing if you’re willing to wait for it.
The first real action that’s worth paddling out for kicks off on Saturday morning, July 4th. We’ve got a solid 6.6ft swell rolling in from the S at Siriu, with a period of 12 seconds. That’s a nice, long groundswell, which means it’s got some real punch and shape. The combined energy of all swells is a strong 1186. The wind is a light cross-off from the SW at 6 mph, and the water is feeling much colder than normal for this time of year, sitting at 61.3°.
This is a beginner-friendly break, but with a 6.6ft swell, it’s getting a bit too big for total beginners. The way the wind is setting up, it’s going to be clean and lined up. That’s a great window for a more experienced surfer who wants some open faces. The wind stays manageable through the afternoon, too, but it goes cross, so the morning is the real call.
Sunday morning, the 5th, is a glassy dream. The swell drops a touch to 6.2ft still from the SSE, but with a NW wind of just 3 mph, it’s going to be a mirror. It’s a short window, but if you can get out there early, you’ll be rewarded with some of the cleanest lines of the week.
After that, things get a bit messy and smaller for a stretch. The middle of the week (Monday through to the following weekend) is a bit of a write-off, with the swell dropping under 3.3ft and wind messing it up. You’ll be looking at a few days of small, ordinary conditions.
The next real standout shows up on the morning of Tuesday, July 14th. That’s a week and a half out, so keep an eye on it. We’re looking at a 5.2ft S swell with a 12-second period, and the wind is a light cross-off from the SSW at 6 mph. The combined energy is a solid 719, and it’s going to be clean. That’s a proper return to form for a morning session.
The real highlight, though, is the end of the run. The morning of Sunday, July 19th, is looking like a beast. The forecast has a 8.2ft NE swell, but with a short period of 8 seconds. The wind is dead calm, glassy, zero. The combined energy is a massive 1363. This is a big, powerful, and clean swell. At 8.2ft, this is for experts only. It’s a bit of a short period, so it might be a bit punchy and close out on a beach break, but if the banks are right, there will be some heavy, clean barrels. That’s the one to circle on the calendar if you’ve got the skills.
So, to sum it up: the best of the best is that glassy Sunday morning on the 19th for the big, powerful swell, with the Saturday morning on the 4th and the Tuesday morning on the 14th as your next best windows for clean, solid surf.
Stay stoked, and I’ll see you in the water.
Short Range ForecastModerate rain (total 17mm), heaviest on Mon night. Very mild (max 18°C on Mon morning, min 11°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Thu morning, min 11°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
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 | SSE 12 | SSE 11 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SE 10 | SE 10 | S 7 | S 8 | S 8 | S 8 | S 9 | S 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 10 | ESE 11 |
Wave Graph | |||||||||||||||||||||
1155 | 1348 | 1034 | 839 | 643 | 410 | 296 | 245 | 217 | 330 | 160 | 141 | 135 | 140 | 133 | 102 | 100 | 80 | 128 | 118 | 176 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | off | glassy | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-on | cross-off | cross-off | cross-on | cross-off | cross | cross-on | glassy | cross-off | glassy | cross-off |
High Tide | 4:57PM0.66m | 4:26AM0.69m | 5:40PM0.62m | 5:14AM0.65m | 6:31PM0.58m | 6:13AM0.60m | 7:37PM0.53m | 7:40AM0.56m | 11:17PM0.50m | 11:31AM0.60m | 00:03AM0.49m | 12:39PM0.69m | 00:30AM0.48m | ||||||||
Low Tide | 11:15AM0.08m | 11:49PM0.37m | 12:08PM0.12m | 00:48AM0.37m | 1:10PM0.17m | 1:53AM0.37m | 2:23PM0.22m | 3:03AM0.34m | 3:46PM0.25m | 4:12AM0.29m | 5:13PM0.26m | 5:15AM0.22m | 6:32PM0.26m | ||||||||
7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | |
— | 5:30 | — | — | 5:30 | — | — | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:32 | — | |
mm | — | — | — | — | — | — | — | 2 | 15 | — | — | — | — | — | — | — | — | — | 6 | 1 | 3 |
Temp °C | 14 | 15 | 12 | 16 | 16 | 14 | 18 | 17 | 15 | 14 | 15 | 12 | 16 | 17 | 14 | 19 | 18 | 14 | 14 | 14 | 14 |
Feels °C | 11 | 12 | 10 | 14 | 13 | 12 | 16 | 17 | 13 | 11 | 12 | 11 | 13 | 15 | 12 | 18 | 16 | 13 | 13 | 14 | 10 |
Swell 1 Height (m) Direction Period (s) | S 12 | SSE 12 | SSE 11 | SSE 11 | SSE 11 | SSE 10 | SSE 10 | SE 10 | SE 10 | S 7 | S 8 | S 8 | S 8 | S 9 | S 10 | ESE 10 | ESE 10 | ESE 10 | ESE 11 | ESE 10 | ESE 11 |
1155 | 1348 | 1034 | 839 | 643 | 410 | 296 | 245 | 217 | 168 | 160 | 141 | 135 | 140 | 133 | 102 | 100 | 80 | 128 | 118 | 176 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | ENE 9 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | SSE 18 | SSE 16 | SSE 15 | SE 10 | SE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | S 9 | S 9 | S 8 | NE 5 | NE 5 | NE 5 |
31 | 29 | 32 | 32 | 31 | 35 | 207 | 147 | 72 | 134 | 139 | 120 | 98 | 100 | 104 | 61 | 39 | 11 | 12 | 9 | 6 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | SE 23 | SSE 20 | ENE 9 | ENE 9 | ENE 8 | ESE 11 | SSE 13 | E 8 | E 8 | SSE 14 | — | S 15 | S 14 | NE 5 | S 7 | SSW 7 | S 6 |
— | — | — | — | 21 | 152 | 28 | 16 | 14 | 51 | 33 | 5 | 5 | 37 | — | 4 | 4 | 7 | 9 | 5 | 3 | |
Wind waves Height (m) Direction Period (s) | S 10 | — | — | — | — | N 3 | NNE 3 | NNE 4 | S 5 | S 7 | — | — | — | N 2 | N 3 | NNE 4 | NNE 4 | NNE 5 | NNE 5 | — | — |
861 | — | — | — | — | 4 | 4 | 6 | 25 | 330 | — | — | — | 1 | 1 | 2 | 26 | 17 | 27 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 10 | 0 | 0 | 27 | 9 | 18 | 0 | 0 | 0 | 13 | 0 | 0 | 26 | 0 | 9 | 10 | 0 | 0 | 0 | 13 |
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)
Information about the Siriu Surf forecast
The above surf forecast table for Siriu provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Siriu can be found by selecting the local surf guide option on the grey menu. Our Siriu 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 (Siriu) 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 Siriu 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.
Siriu is 27 km (17 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.










