Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 8 pm 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 16 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, 6AM (local time) - 7.5ft (2.3m), 8s period, E swell with 715 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 3AM (local time) - 6.5ft (2.0m), 8s period with E 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 Sunday (Aug 16) at 3AM. The primary swell is predicted to be 2.0m and 8s period with a secondary swell of 1.4m and 8s. Another secondary swell of 0.9m and 11s is also forecast. 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 2.3m 8s and forecast to arrive on Monday (Aug 17) at 6AM. Winds are predicted to be glassy at the time the swell arrives.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 3AM (Sun 16th Aug)6.5ft (2.0m) 8s
Best Surf12AM (Mon 17th Aug)7ft (2.1m) 8s
Most Powerful 6AM (Mon 17th Aug)7.5ft (2.3m) 8s

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


The Lowdown

Alright, mates, Rusty here. Let's cut the crap and talk about the surf at Balneario Sao Jose.

The next couple of weeks are a real mixed bag. We've got some clean, glassy mornings to start, but the afternoons get chopped up. The middle of the week goes totally flat, then a bigger, more powerful swell fills in for the final weekend. Pay attention to that last Saturday, it's got potential.

We start on Sunday the 16th with a clean morning. It's glassy with a 5ft ESE swell, and the energy is moderate at 460. The period is a short 8 seconds, so it'll be a bit soft, but it's rideable. The afternoon gets messier as a light cross-on breeze kicks up, so get your fix early. Monday the 17th is a similar story: a clean 6ft morning, then a weaker 5ft in the afternoon. Tuesday the 18th sees the swell drop off to a small 4ft, and the energy fades to 219. Still clean in the morning, but definitely smaller.

From Wednesday the 19th through Friday the 21st, we run into a flat spell. The swell drops below 3ft, and the energy readings fall under 100 – that’s weak, gutless stuff. There's nothing worth paddling for, and the wind isn't helping. It's a good time to fix that blown-out fin or just take a break.

Saturday the 22nd shows a little life, with around 2ft of swell and a 10-second period, but the energy is weak at 113. It's not inspiring. Then Sunday the 23rd is when the ocean wakes up, but not in a good way. A strong south wind brings rain and a jump in swell to a messy 7ft by the afternoon. The energy is up at 605, but with that wind, it's going to be a complete washing machine. That continues into Monday the 24th, with the biggest energy reading of the run at 836 and a 6ft SSE swell, but it's all onshore junk. This is the kind of day where the beach setup, blown out and messy, is more interesting for the kite surfers than us.

Midweek is a write-off with onshore winds and rain. But then, the ocean starts to calm. On Wednesday the 26th, the wind turns light offshore in the morning and goes glassy in the afternoon. The swell is small, around 3-3ft, but it's clean and has a nice, long 11-second period. The energy is moderate. It's a sign of things to come. Thursday the 27th is also clean and glassy, though the swell is down to around 2ft.

Now, for the good part. Friday the 28th sees a new pulse of swell arrive, reading 5ft with a 9-second period and a big jump in energy to 916. The winds are cross-on, which is a bit of a bummer, but the ocean has some grunt to it. However, the *real* gem is Saturday the 29th. The winds go light and glassy in the morning, and there’s 5ft of swell with a longer 10-second period. The energy is a solid 824, and the conditions are set to be very good. This is the morning to be out there. It's not huge, so it's doable, but it's got the size and the clean surface to make the most of that SE direction. The afternoon will still have waves, but the cross-shore wind will make it trickier.

We finish the run with a smaller Sunday the 30th, around 4ft and energy dropping back to 482. The morning is a bit lumpy, but the afternoon glass comes back and it looks fun if a little smaller. Monday the 31st looks marginal, with the swell down to 3ft and a cross-shore wind.

So, there's the picture. Get out there early this coming Sunday and Monday, sit out the flat spell in the middle, and circle Saturday the 29th on the calendar. That's the one. It's looking promising, but the long-range stuff is always a bit less certain. Until next time, I'm Rusty.

Short Range Forecast

Mostly dry. Warm (max 30°C on Tue morning, min 19°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 30°C on Wed morning, min 19°C on Wed night). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
0
4
2
1
3
2
0
1
1
0
0
1
0
1
0
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)
2
E
8
1.6
ESE
8
1.7
ESE
8
2.1
E
8
1.7
ESE
8
1.4
ESE
8
1.8
E
8
1.2
ESE
8
1.1
ESE
8
0.9
ESE
8
0.8
ESE
8
0.8
ESE
8
0.7
E
8
0.6
E
7
0.5
E
7
0.4
S
9
0.9
ESE
7
0.9
ESE
8
0.7
E
8
Wave Graph
Metric surfscale
Energy kJ
451
283
345
565
380
244
417
202
163
101
75
75
55
40
28
27
77
94
55
Wind (km/h)
0
WNW
5
E
10
ESE
5
NE
5
S
10
ESE
5
NNE
5
N
5
SE
5
NNW
0
WNW
10
SE
10
SW
5
S
5
E
10
NNE
10
SW
10
S
5
NE
Wind State
glassy
glassy
cross-on
glassy
glassy
cross-on
glassy
glassy
cross-on
off
glassy
cross-on
cross-on
glassy
cross-on
cross-off
cross-on
on
cross-off
High Tide
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
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
part cloud
clear
part cloud
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>
6:31
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
5:50
5:50
5:51
5:51
 mm
Temp °C
20
23
23
20
24
24
23
30
28
27
30
29
26
26
26
26
25
22
18
Feels °C
23
25
25
22
26
26
25
31
29
27
30
29
27
28
27
24
24
22
19
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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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