
Surf Forecasts:
Siriu surf forecast from 6 Jul 2026:
- Best quality surf: Monday 13 Jul, 12AM (local time) - 7ft (2.1m), 8s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 3AM (local time) - 7ft (2.1m), 11s period, S swell with 1,027 kJ wave energy.
- Next surfable swell (1★+): Monday 6 Jul, 3PM (local time) - 3.5ft (1.1m), 10s period with SE 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 Monday (Jul 06) at 3PM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 0.5m and 16s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Siriu in the next 16 days are 2.1m 11s and forecast to arrive on Monday (Jul 13) 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 1.8m 8s period and expected on Tuesday (Jul 07) at 12PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3PM (Mon 6th Jul) | 3.5ft (1.1m) 10s |
| Best Surf | 12AM (Mon 13th Jul) | 7ft (2.1m) 8s |
| Most Powerful | 3AM (Mon 13th Jul) | 7ft (2.1m) 11s |
Table - best surf conditions forecast for Siriu over the next 16 days.
Updates in hr min s Forecast update imminent
Alright, Rusty here. Let’s have a look at what’s coming down the line for Siriu.
We’ve got a bit of a slow start, but don’t write it off. The first real call to get wet is Monday afternoon. It’s not big, but it’s clean. Light rain, glassy conditions, and a small SSE swell around 3.6 ft. The period is a solid 10 seconds, so there’s some shape. The energy’s moderate (421). It’ll be a fun session for a beginner on a log or a foiler.
Tuesday morning the swell picks up. We’re looking at a 6.2 ft south swell with a short 8-second period. That’s a lot of juice – the energy reading is 816 – but it’s short interval, so it’ll be a bit lumpy and fat. The wind is cross-offshore from the SSW at 15 mph, so it will be clean. This one is pushing the limits for beginners; over 5 ft is getting serious for the less experienced.
The real standout, the one you want to circle on the calendar, is Saturday the 11th of July. Morning session. Siriu will be under cloudy skies with glassy wind – absolute magic. The swell is a 4.6 ft ESE groundswell with a long 13-second period. That’s proper energy (701) and it’s coming from the east, which is the optimum direction for this break. It’s not too big, it’s clean, and it’ll have some push. This is the best wave of the first week.
Sunday the 12th is a mixed bag. The morning is clean and cross-off with a 3.3 ft ESE swell, but the afternoon jumps up to a 7.2 ft south swell with a short period and onshore wind. That afternoon is messy and too big for anyone but the brave ones.
The following week has another highlight. Monday the 13th of July morning: a 5.6 ft south swell, cross-off wind, and an energy reading of 1256. That’s strong. The file says excellent conditions for experienced surfers, and that’s the truth. The afternoon gets roasted by a 22 mph wind, so don’t bother.
Then, Friday the 17th of July morning: another excellent call. A 5.9 ft south swell with a very long 13-second period. Glassy conditions, light wind, energy at 1231. This is a proper groundswell for the experienced crew. It’ll be clean and powerful.
Overall, the best of the best is Saturday the 11th morning – that glassy, 4.6 ft east groundswell is just perfect for a fun session with clean lines. The back-up is Monday the 13th morning for the bigger, more powerful stuff.
A note about the water: it’s currently running much colder than normal for this time of year – about 60.6°F, which is 5.6°F colder than average. That’s very unusual, so you’ll want a thicker suit or a hood.
That’s the outlook from here. Keep your eyes on the horizon and your wax on.
Short Range ForecastLight rain (total 8mm), mostly falling on Mon afternoon. Very mild (max 18°C on Mon morning, min 11°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat afternoon. Warm (max 21°C on Thu afternoon, min 14°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||
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 | SE 10 | SE 10 | S 8 | S 8 | ESE 9 | S 9 | S 11 | S 10 | ESE 10 | ESE 10 | ESE 10 | ESE 12 | ESE 11 | ESE 12 | ESE 13 | ESE 13 | ESE 13 | ESE 12 | S 8 | S 8 |
Wave Graph | |||||||||||||||||||||
320 | 245 | 213 | 419 | 167 | 110 | 98 | 305 | 162 | 147 | 118 | 116 | 125 | 297 | 532 | 673 | 606 | 476 | 320 | 655 | 496 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-off | cross-off | on | cross-off | glassy | cross-on | cross-off | cross | cross-on | cross-off | cross-off | cross-on | glassy | glassy | cross-on | glassy | cross-off | cross | cross-off |
High Tide | 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 | 1:31PM0.77m | 00:40AM0.48m | 2:18PM0.81m | 00:49AM0.50m | ||||||||
Low Tide | 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 | 6:11AM0.14m | 7:35PM0.26m | 7:01AM0.06m | 8:25PM0.29m | ||||||||
7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — | |
— | 5:31 | — | — | 5:31 | — | — | 5:32 | — | — | 5:32 | — | — | 5:32 | — | — | 5:34 | — | — | 5:34 | — | |
mm | — | 3 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | — | 1 | 2 |
Temp °C | 18 | 18 | 14 | 13 | 14 | 12 | 16 | 17 | 14 | 20 | 21 | 16 | 18 | 18 | 15 | 16 | 17 | 16 | 17 | 17 | 16 |
Feels °C | 17 | 19 | 11 | 12 | 12 | 11 | 15 | 15 | 12 | 17 | 17 | 14 | 16 | 17 | 14 | 16 | 17 | 16 | 17 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SSE 10 | SE 10 | SE 10 | S 8 | S 8 | S 8 | S 9 | S 11 | S 10 | ESE 10 | ESE 10 | ESE 10 | ESE 12 | ESE 11 | ESE 12 | ESE 13 | ESE 13 | ESE 13 | ESE 12 | ESE 13 | S 8 |
320 | 245 | 213 | 222 | 167 | 102 | 96 | 305 | 162 | 147 | 118 | 116 | 125 | 297 | 532 | 673 | 606 | 476 | 320 | 265 | 299 | |
Swell 2 Height (m) Direction Period (s) | SSE 18 | SSE 16 | SSE 15 | SE 10 | ESE 10 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | S 9 | S 8 | S 7 | ESE 10 | NE 4 | S 5 | S 5 | S 5 | SSE 14 | SSE 12 | SSE 14 | SSE 11 |
207 | 147 | 72 | 139 | 122 | 110 | 98 | 140 | 146 | 76 | 47 | 17 | 74 | 5 | 5 | 5 | 5 | 105 | 203 | 136 | 234 | |
Swell 3 Height (m) Direction Period (s) | ENE 9 | ENE 9 | ENE 9 | SSE 14 | SSE 13 | SSE 10 | S 10 | ESE 11 | NE 6 | S 15 | S 14 | S 13 | NE 5 | S 6 | S 15 | SSE 15 | — | NE 4 | SSE 14 | S 17 | ESE 12 |
17 | 16 | 15 | 36 | 34 | 35 | 78 | 43 | 1 | 4 | 4 | 3 | 11 | 3 | 4 | 23 | — | 2 | 140 | 52 | 187 | |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNE 4 | S 6 | S 8 | — | — | — | — | — | — | NE 3 | NNE 4 | — | SSW 6 | — | — | NNE 4 | SSW 5 | S 7 | S 8 | S 8 |
6 | 13 | 61 | 419 | — | — | — | — | — | — | 2 | 16 | — | 14 | — | — | 9 | 5 | 145 | 655 | 496 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 0 | 0 | 0 | 38 | 0 | 0 | 16 | 0 | 6 | 9 | 0 | 0 | 13 | 0 | 0 | 9 | 0 | 0 | 10 | 0 |
Best forecast wave conditions in Santa Catarina - Sul | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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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.










