Barre da Una surfForecast / São Paulo / Brazil

information circle12 Day Weather and Surf, issued 2 pm Thursday 11 Dec 2025 -03
Forecast update in hr  min  s Forecast update imminent
Barre da Una surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Barre da Una sea temperature is
25.2° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Barre da Una this week:

The surf forecast for Barre da Una over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Dec 11) at 9PM. The primary swell is predicted to be 1.9m and 12s period with a secondary swell of 0.4m and 8s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Barre da Una in the next 12 days are 2.0m 13s and forecast to arrive on Friday (Dec 12) at 12AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 7s period and expected on Wednesday (Dec 17) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Thu 11th Dec)6ft (1.9m) 12s
Best Surf 9PM (Thu 11th Dec)6ft (1.9m) 12s
Most Powerful12AM (Fri 12th Dec)6.5ft (2.0m) 13s

Table - best surf conditions forecast for Barre da Una over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Heavy rain (total 36mm), heaviest during Sat afternoon. Warm (max 32°C on Fri morning, min 22°C on Fri afternoon). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 19mm), heaviest on Mon night. Warm (max 34°C on Mon afternoon, min 21°C on Tue night). Wind will be generally light.

Thu
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
1
3
3
2
2
1
1
1
1
1
0
0
0
0
0
0
0
0
0
2
2
Swell
Height Map
Wave Height (m) & direction (?)
0.9
S
2
S
1.9
S
1.7
S
1.4
S
1.1
S
1
S
0.9
SSE
0.7
SSE
0.7
SSE
0.6
SSE
0.4
SSE
0.4
SSE
0.5
SSE
1.4
S
1.7
S
1.2
SSE
1.2
S
1.3
S
1.3
S
1.4
S
Period(s) (?)13131212111010101010109101067812121112
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2771298105677844824219417010610272264252130271154439480411553
Wind
(km/h)
10
S
10
N
5
SW
5
SSW
10
N
10
NNW
5
N
10
N
10
N
5
NNE
10
NNW
10
NW
10
WSW
10
NNW
15
SW
15
SW
10
SE
15
SE
15
SE
5
NE
5
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onoffglassglassoffoffglassoffoffglassoffcross-
off
cross-
on
offcross-
on
cross-
on
cross-
on
cross-
on
cross-
on
glassglass
High Tide
/ height (m)
6:25PM
0.89
8:05AM
0.76
7:45PM
0.83
9:58AM
0.77
9:58PM
0.82
11:13AM
0.81
11:45PM
0.88
11:54AM
0.85
12:38AM
0.96
12:29PM
0.89
1:18AM
1.03
1:00PM
0.92
1:52AM
1.08
Low Tide
/ height (m)
2:37AM
0.39
3:10PM
0.60
3:47AM
0.43
4:18PM
0.52
4:52AM
0.43
5:14PM
0.43
5:49AM
0.42
6:02PM
0.33
6:38AM
0.40
6:43PM
0.24
7:21AM
0.37
7:22PM
0.16
8:00AM
0.35
Thu
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tuesday
16
Wednesday
17
Sunrise--5:09--5:09--5:09--5:09--5:11--5:11--5:11
Sunset6:43--6:44--6:45--6:45--6:45--6:45--6:46--
clear
clear
clear
light rain
heavy rain
mod rain
heavy rain
part cloud
cloud
rain showers
part cloud
part cloud
thunderstorm
rain showers
light rain
rain showers
rain showers
part cloud
part cloud
part cloud
cloud
Rain (mm)
---314712--1--25551----
Temp. °C312532272324242428272533342424222223232124
Feels °C (?)312633302527282732322935372727242523232225
  • Map Icons:
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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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Information about the Barre da Una Surf forecast

The above surf forecast table for Barre da Una provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Barre da Una can be found by selecting the local surf guide option on the grey menu. Our Barre da Una 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 (Barre da Una) 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 Barre da Una 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.

Are you planning a holiday in São Paulo? If you are looking for accommodation near Barre da Una, camping, hotels and holiday cottages in São Paulo, consider staying in Biritiba Mirim which is 26 km (16 miles) away. Other places in and around São Paulo where you can find information about places to rent, and car hire include Bertioga which is 27 km (17 miles) away, Mogi das Cruzes, Guararema and Moji das Cruzes.

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