Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 8 am 30 Aug 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
21.3°C
1.6° 

Balneario Sao Jose surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Balneario Sao Jose surf forecast from 30 Aug 2026:

  • Best quality surf: Thursday 3 Sep, 3AM (local time) - 4ft (1.2m), 10s period, SSE swell with cross-offshore winds.
  • Most powerful swell: Sunday 6 Sep, 9AM (local time) - 5.5ft (1.7m), 8s period, S swell with 393 kJ wave energy.
  • Next surfable swell (1★+): Monday 31 Aug, 12AM (local time) - 2.5ft (0.7m), 8s period with ESE swell.

Best Forecast Surf Conditions for Balneario Sao Jose this week:

The surf forecast for Balneario Sao Jose over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 31) at 12AM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.5m and 5s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Balneario Sao Jose in the next 16 days are 1.7m 8s and forecast to arrive on Sunday (Sep 06) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12AM (Mon 31st Aug)2.5ft (0.7m) 8s
Best Surf 3AM (Thu 3rd Sep)4ft (1.2m) 10s
Most Powerful 9AM (Sun 6th Sep)5.5ft (1.7m) 8s

Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.


The Lowdown

G’day, Rusty here, looking over the next couple of weeks for our local stretch. It’s gonna be a bit of a mixed bag, with some solid waiting time before we see anything worth getting wet for. The water’s sitting at 70°, which is a touch warmer than usual for this time of year – nice for the first session when it comes.

Alright, so for the first few days, honestly, there’s not much to get excited about. The whole of Sunday the 30th and Monday the 31st of August are pretty flat and messy, with tiny 2ft swell and cross-onshore winds. Not worth paddling out. That carries over into Tuesday the 1st of September – Tuesday morning, though, we finally get a flicker of hope. Balneario Sao Jose picks up a glassy 4ft swell from the south, period is short at 6 seconds, but it’s clean enough to get a few slope-y ones. The combined swell energy is weak (145), so don’t expect any power. Still, if you’re jonesing, it’s the first window where you won’t be fighting a washing machine.

Then we go into another dry spell. Wednesday the 2nd and Thursday the 3rd are blown out by moderate cross-onshore winds and choppy conditions, with swell around 4ft but messy. Not worth it.

Now, here’s where it gets interesting. Friday morning the 4th of September is a true standout for the first week. Balneario Sao Jose delivers glassy conditions with a light offshore breeze from the west, dead calm. The swell is a small but clean 3ft from the SSE, with a long period of 11 seconds – that’s proper groundswell energy. Combined energy is moderate (211), so the waves will have some push. The break is fairly consistent and exposed to the SE, which is bang on for the optimum swell direction. This is your best bet for a clean, cruisy session with nobody hassling you too much – crowds are often here but on a Friday morning like this, you’ll find your own peak.

After that, we get a bit of a lull over the weekend, with small swell and some onshore junk. But keep an eye on Sunday the 6th – the swell jumps to 7ft, but it’s onshore and messy, and the combined energy is strong (656). That kind of size with onshore wind at a beach/pier setup is gonna be a washing machine. More of a kite-surfing day than a paddling day.

The second week has a couple of promising windows. Tuesday morning the 8th of September looks clean, with a light cross-offshore breeze from the NE and a 4ft ESE swell (period 7 seconds, moderate energy at 256). It’s surfable, but nothing that’ll blow your hair back.

The real highlight of the second week is Friday morning the 11th of September. Glassy conditions again, with a 4ft ESE swell, period 8 seconds, and combined energy up at 300 – that’s moderate, solid energy. The break is fairly consistent, and with that clean glass, the waves will be peeling nicely. Again, the swell direction is a great match for the spot. Crowds are possible, but the quality will be worth sharing a few waves.

Then on Saturday the 12th of September afternoon, things turn glassy again with a 2ft S swell, long period of 10 seconds (combined energy 212). It’s small but clean, perfect for a longboard.

Looking way out, there’s a big one on Monday the 14th of September. Swell hits 8ft from the SE, period 10 seconds, with a huge combined energy of 1892 – that’s very strong wave energy. But that size at a beach/pier break is only for experts. The wind is light onshore, so it’ll be a beast. Not one for the faint-hearted.

All in all, the pick of the bunch is Friday morning the 4th of September for clean, long-period groundswell, and Friday morning the 11th of September for a glassy, fun-sized session. Everything else is a wait-and-see. The forecast can change though, so keep an eye on it.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Sun night. Warm (max 25°C on Mon morning, min 18°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the SW by Tue night).

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Wed morning. Warm (max 25°C on Fri morning, min 15°C on Wed night). Wind will be generally light.

Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
Friday
4
Saturday
5
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
0
0
1
1
1
0
0
0
1
1
0
2
2
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.7
ESE
8
0.7
ESE
8
0.7
ESE
8
0.7
ESE
8
0.6
ESE
8
0.7
E
8
1
S
7
1
S
7
0.8
E
9
1.1
SSW
5
1.2
S
6
1.3
SSE
10
1.3
SSE
10
1.1
SSE
11
0.9
SSE
11
0.8
SSE
10
0.7
SE
10
0.8
E
8
0.6
E
8
1.2
S
6
1.7
S
7
Wave Graph
Metric surfscale
Energy kJ
65
72
72
72
54
64
85
85
108
74
120
289
308
275
204
141
104
74
45
92
306
Wind (km/h)
10
SW
10
SSE
5
ENE
5
E
10
SE
5
WNW
5
WNW
10
WSW
15
WSW
20
SSW
20
SSW
5
ESE
5
ENE
10
ESE
5
NW
0
SSW
10
S
10
WSW
5
WSW
20
SW
25
SSW
Wind State
cross-on
on
glassy
cross
cross-on
glassy
glassy
cross
cross
cross-on
cross-on
cross-on
cross
cross-on
glassy
glassy
on
cross
cross
cross-on
cross-on
High Tide
3:57PM1.32m
4:04AM1.42m
4:28PM1.24m
4:42AM1.33m
5:00PM1.13m
5:25AM1.21m
5:34PM1.00m
6:18AM1.06m
6:14PM0.86m
7:35AM0.91m
1:14PM0.85m
7:15PM0.74m
1:22PM0.99m
9:36PM0.70m
Low Tide
10:00AM0.04m
9:56PM0.25m
10:24AM0.16m
10:09PM0.27m
10:40AM0.31m
10:20PM0.31m
10:47AM0.47m
10:34PM0.36m
10:48AM0.64m
10:54PM0.44m
10:43AM0.79m
4:56PM0.69m
11:18PM0.54m
4:35AM0.48m
6:16PM0.60m
rain showers
thunderstorm
rain showers
part cloud
part cloud
cloud
cloud
light rain
rain showers
rain showers
rain showers
rain showers
clear
clear
clear
clear
clear
part cloud
part cloud
light rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:18
6:16
6:16
6:15
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:53
5:53
5:54
5:54
5:54
5:55
5:55
 mm
2
1
3
1
2
2
1
1
4
6
Temp °C
22
24
21
25
23
21
24
23
23
18
19
18
21
21
18
25
24
20
22
19
19
Feels °C
25
26
24
28
26
24
26
25
22
16
17
17
20
20
19
25
24
21
23
18
18
  • 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 Balneario Sao Jose Surf forecast

The above surf forecast table for Balneario Sao Jose provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Balneario Sao Jose can be found by selecting the local surf guide option on the grey menu. Our Balneario Sao Jose 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 (Balneario Sao Jose) 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 Balneario Sao Jose 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.

Balneario Sao Jose is 3 km (2 miles) from the city of Mongagua. If you plan a holiday in São Paulo, look for hotels and other accommodation in Mongagua. Mongagua has rooms for a wide range of budgets as well as car hire and transport links.

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