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Siriu Surf Forecast
/ Santa Catarina – Sul (37 surf breaks) /
Surf Forecasts:
Siriu surfForecast / Santa Catarina – Sul / Brazil
12 Day Weather and Surf, issued 2 am Sunday 28 Dec 2025 -03Forecast update in hr min s Forecast update imminent
Siriu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Siriu sea temperature is
25.4° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Siriu this week:
The surf forecast for Siriu over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 28) at 9PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.4m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Siriu in the next 12 days are 2.0m 16s and forecast to arrive on Wednesday (Dec 31) at 12AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Friday (Jan 02) at 6AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 28th Dec) | 1.5ft (0.4m) 11s |
| Best Surf | 6AM (Sun 4th Jan) | 4.5ft (1.4m) 12s |
| Most Powerful | 12AM (Wed 31st Dec) | 6.5ft (2.0m) 16s |
Table - best surf conditions forecast for Siriu over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 59mm), heaviest during Mon night. Warm (max 29°C on Sun morning, min 18°C on Mon night). Wind will be generally light. | Days 3-6 Weather Summary Heavy rain (total 47mm), heaviest during Wed night. Warm (max 28°C on Wed morning, min 20°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 28 | Monday 29 | Tuesday 30 | Wednesday 31 | Thursday 01 | Friday 02 | Saturday 03 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 11 | 10 | 6 | 5 | 5 | 19 | 16 | 14 | 13 | 12 | 11 | 11 | 10 | 10 | 9 | 13 | 12 | 11 | 11 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 47 | 31 | 20 | 18 | 15 | 63 | 32 | 465 | 1923 | 975 | 613 | 373 | 205 | 156 | 106 | 68 | 64 | 836 | 494 | 371 | 681 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- off | glass | cross | on | glass | cross- on | cross- on | cross | cross- on | cross | cross | cross | cross- off | cross- off | cross- on | off | cross | cross | cross |
High Tide / height (m) | 11:16AM 0.55 | 9:22PM 0.54 | 11:58AM 0.54 | 12:03AM 0.63 | 12:27PM 0.51 | 12:59AM 0.71 | 12:37PM 0.49 | 1:46AM 0.78 | 12:38PM 0.49 | 2:29AM 0.80 | 12:49PM 0.51 | 3:05AM 0.79 | 1:11PM 0.57 | ||||||||
Low Tide / height (m) | 3:53PM 0.34 | 4:30AM 0.23 | 4:54PM 0.28 | 5:49AM 0.24 | 5:48PM 0.20 | 6:59AM 0.24 | 6:36PM 0.12 | 7:56AM 0.27 | 7:21PM 0.05 | 8:42AM 0.31 | 8:04PM -0.00 | 9:20AM 0.36 | 8:46PM -0.03 | ||||||||
Sunday 28 | Monday 29 | Tuesday 30 | Wednesday 31 | Thursday 01 | Friday 02 | Saturday 03 | |||||||||||||||
| Sunrise | 5:18 | - | - | 5:18 | - | - | 5:18 | - | - | 5:20 | - | - | 5:20 | - | - | 5:20 | - | - | 5:22 | - | - |
| Sunset | - | 7:13 | - | - | 7:13 | - | - | 7:13 | - | - | 7:14 | - | - | 7:14 | - | - | 7:14 | - | - | 7:14 | - |
 |  |  | |  |  |  |  | | | |  | | | | | |  | | |  | |
Rain (mm) | - | 2 | 3 | 1 | 10 | 41 | - | - | 2 | - | 6 | 34 | - | 2 | 3 | 1 | 1 | - | - | - | - |
| Temp. °C | 29 | 27 | 24 | 25 | 24 | 22 | 21 | 22 | 23 | 28 | 28 | 23 | 28 | 27 | 25 | 26 | 25 | 22 | 24 | 23 | 21 |
| Feels °C (?) | 31 | 30 | 27 | 29 | 28 | 23 | 23 | 24 | 25 | 29 | 29 | 26 | 30 | 30 | 28 | 26 | 26 | 23 | 22 | 22 | 21 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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 Siriu 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.
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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 12 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.
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