Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 8 am 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
20.7° C
1.4° 

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 15 Aug 2026:

  • Best quality surf: Monday 17 Aug, 12AM (local time) - 7ft (2.1m), 8s period, E swell with glassy winds.
  • Most powerful swell: Monday 17 Aug, 3AM (local time) - 8ft (2.4m), 8s period, E swell with 798 kJ wave energy.
  • Next surfable swell (1★+): Saturday 15 Aug, 6PM (local time) - 3.5ft (1.1m), 12s period with S 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 Saturday (Aug 15) at 6PM. The primary swell is predicted to be 1.1m and 12s period with a secondary swell of 1.2m and 8s. 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 2.4m 8s and forecast to arrive on Monday (Aug 17) at 3AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 6PM (Sat 15th Aug)3.5ft (1.1m) 12s
Best Surf12AM (Mon 17th Aug)7ft (2.1m) 8s
Most Powerful 3AM (Mon 17th Aug)8ft (2.4m) 8s

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


The Lowdown

G’day, it’s Rusty here. Let’s take a squiz at what’s on the cards for our part of the coast over the next couple of weeks. To be honest, it’s not going to be a non-stop party. There’s a real dead spot at the start, and we’re hanging around for a few days before anything worth paddling out for shows up.

The Long Wait

The first few days are pretty rough. We’re looking at a couple of days with nothing on offer at all to start with. The swell is weak and all over the place, and the wind is adding to the mess. You’re better off finding something else to do for the first part of the week.

Monday the 17th – The First Real Window

Finally, on Monday the 17th, we get a bit of a break. It’s still not big, but it’s clean. We’ve got a 5ft ESE swell with a 8-second period. The key here is the wind – it’s dead glassy. That’s a massive positive, as it’ll be smooth out there. It’s not going to be firing, but it’s the first proper chance to get a few. The combined energy is moderate at 409. It’s a beginner-friendly size, so a good one to get the cobwebs out.

The Mid-Week Lull

After that little tease, we settle back into a lull. Tuesday the 18th has some tiny waves in the morning, with a 4ft swell and glassy conditions, but it’s pretty weak. By Wednesday and Thursday, we’re scraping the bottom of the barrel with sub-3ft waves. It’s a real flat spell. The energy just drains away, dropping to 61 by Thursday morning. You can see the lack of power in the water.

A Brief Pulse, Then More Waiting

There’s a hint of something on Friday the 21st, but the wind swings onshore and it turns to junk. The weekend looks messy too. It’s not looking like a classic.

The Standout – Saturday the 29th

Now, let’s talk about the one that’s got my attention. It’s a bit of a long-range call, so don’t book the time off just yet, but Saturday the 29th is our standout. The morning shows a solid 7ft E swell, with a period of 8 seconds. Now, the bigger size of 7ft is pushing it for beginners, but for the crew that’s comfortable, this is the most interesting day on the board. The energy jumps back up to a strong 821. The wind is forecast to be light and glassy. That’s the recipe for some proper, clean surf. With the swell direction from the E and the break at Balneario Sao Jose (Ilhabela) exposed to SE, it should be hitting the bank nicely. This is the one to keep an eye on as it gets closer – the long-range forecasts can change, but this has the makings of the best session of the window.

Into the Second Week

After that, we trail off again. Sunday the 30th has some small, clean waves in the morning, nothing to get too excited about. The water temp is sitting around 69°, which is a touch warmer than normal for this time of year.

So, there you have it. A quiet start, a small window early on, and then clear skies for that promising pulse on the 29th. Stay tuned.

Rusty

Short Range Forecast

Light rain (total 3mm), mostly falling on Sat morning. Warm (max 24°C on Sun morning, min 19°C on Sun night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 31°C on Wed morning, min 18°C on Wed night). Wind will be generally light.

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
2
2
0
4
2
1
3
2
0
1
1
0
0
1
0
1
1
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
SSE
13
1.3
SSE
12
1.6
ESE
8
1.7
ESE
8
1.6
ESE
8
2.1
E
8
1.6
ESE
8
1.5
ESE
8
1.9
E
8
1.2
ESE
8
1.1
ESE
8
1
E
8
0.9
ESE
8
0.8
E
8
0.7
E
8
0.7
E
8
0.6
E
7
0.8
E
7
0.8
E
7
1.3
S
6
0.7
E
8
Wave Graph
Metric surfscale
Energy kJ
1060
511
283
335
316
579
354
286
488
207
167
131
96
74
55
55
40
66
66
132
68
Wind (km/h)
10
SW
5
SSW
10
ENE
5
ENE
15
ESE
0
NNE
0
SSW
10
ESE
5
N
5
N
5
ESE
5
N
5
NW
5
SE
15
WSW
5
S
5
E
10
NNE
10
NW
10
S
5
NNE
Wind State
cross
cross-on
cross
cross
cross-on
glassy
glassy
cross-on
glassy
glassy
cross-on
off
glassy
on
cross
glassy
cross-on
cross-off
cross-off
on
cross-off
High Tide
4:14PM1.21m
4:11AM1.35m
4:37PM1.16m
4:44AM1.27m
5:00PM1.10m
5:19AM1.16m
5:24PM1.03m
5:59AM1.03m
5:50PM0.95m
6:51AM0.89m
6:25PM0.85m
8:30AM0.79m
1:28PM0.82m
7:40PM0.75m
Low Tide
10:10AM0.09m
9:53PM0.35m
10:26AM0.20m
10:08PM0.32m
10:39AM0.32m
10:29PM0.32m
10:52AM0.43m
10:54PM0.35m
11:03AM0.55m
11:23PM0.42m
11:06AM0.67m
11:57PM0.52m
10:28AM0.77m
5:16PM0.72m
light rain
light rain
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:31
6:31
6:30
6:28
6:28
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:49
5:49
5:49
5:50
5:50
5:51
5:51
 mm
2
1
Temp °C
20
20
20
24
23
20
24
24
23
29
27
27
31
29
26
25
25
25
28
22
19
Feels °C
22
23
22
26
24
23
26
26
25
30
29
27
31
30
27
27
27
23
27
22
20
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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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