Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 8 pm 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
20.3° C
0.9° 

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 20 Aug 2026:

  • Best quality surf: Tuesday 25 Aug, 6AM (local time) - 6ft (1.8m), 14s period, S swell with glassy winds.
  • Most powerful swell: Monday 24 Aug, 9PM (local time) - 7ft (2.2m), 16s period, SSE swell with 2,305 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 3AM (local time) - 2ft (0.6m), 7s 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 Thursday (Aug 20) at 3AM. The primary swell is predicted to be 0.6m and 7s period with a secondary swell of 0.1m and 13s. Another secondary swell of 0.5m and 4s 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 2.2m 16s and forecast to arrive on Monday (Aug 24) at 9PM. 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+) 3AM (Thu 20th Aug)2ft (0.6m) 7s
Best Surf 6AM (Tue 25th Aug)6ft (1.8m) 14s
Most Powerful 9PM (Mon 24th Aug)7ft (2.2m) 16s

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


The Lowdown

Alright, mate, Rusty here. Let’s have a look at what Balneario Sao Jose has cooking for the next couple of weeks. It’s a bit of a slow start, but there are a couple of windows that’ll get the heart going.

The first few days are a write-off with tiny, weak 2ft to 2ft easterly windswell and onshore winds. You’re looking at flat, bumpy conditions with combined wave energy barely hitting 75. Not worth paddling out for.

Things start to stir late Friday the 21st when a solid south swell pushes in. By Saturday morning the 22nd, we’ve got 5ft of south swell with a decent 10-second period, and the wind is straight onshore. The energy is already climbing into the moderate range (570). The waves are there, but the wind is spoiling the party. This marginal trend continues into Sunday the 23rd, with dropping swell and onshore winds.

Now, Monday the 24th is a real turning point, but for different reasons. We get a powerful pulse of 7ft to 7ft swell from the SSE with a long 14 to 15-second period. The combined wave energy jumps into the strong zone (1822). This is proper groundswell. However, the wind is cross-onshore and there’s light rain. That kind of size with a long period on a beach/pier break like this can be fat and straight, making it tricky. This one is for experts only, and the conditions will be pretty choppy.

The standout session without a doubt is Tuesday the 25th. Both morning and afternoon are absolute perfection. The morning sees 6ft of clean, long-period south swell (14 seconds) with a light offshore cross-wind from the NE. The combined energy is still strong (1391), but the wind state is clean. The afternoon is the crown jewel: the wind goes completely glassy from the SW, with waves still at a solid 5ft and 14-second period. The energy dips a bit (1037) but the quality is rated excellent for experienced surfers. This is the day to be in the water. The water temp anomaly isn’t mentioned, so call it about average for late August.

After Tuesday, the swell slowly fades. Wednesday the 26th morning is still very good with 4ft and glassy conditions, but the wind swings cross-onshore by the afternoon, shortening the session. Thursday the 27th stays marginal as the swell drops and the wind stays messy.

Into the second week, things get quiet. From Friday the 28th onwards, we’re left with small fading swell (3ft down to 1ft) and low energy. The 29th and 30th have some glassy and offshore mornings with tiny 1ft to 2ft waves – maybe a longboard cruise if you’re desperate. There’s a solid gap of small, poor surf all the way through to the end of August.

We then hit a dark patch from Monday the 31st right through to Tuesday the 1st of September with nothing but onshore winds and weak east swell (2ft to 2ft, energy around 55 to 132). The wind is 9 mph onshore – total washout.

Then, a surprise: Wednesday the 2nd of September sees another spike of size – 7ft south swell with a shorter 9-second period and strong energy (1309). But that SSE wind stays cross-onshore at 9 mph, making it a choppy, sloppy affair. If you’re a strong paddle, there’s power there, but the quality is marginal.

Finally, Thursday the 3rd of September brings a glimmer of hope. The morning sees clean 6ft swell from the SE with 7-second period and glassy conditions from the SW. The energy drops back to moderate (364), but a clean 6ft with no wind is a decent way to cap off the forecast period.

The clear standout is Tuesday the 25th afternoon – glassy, solid south swell with plenty of push.

Rusty.

Short Range Forecast

Light rain (total 3mm), mostly falling on Sat morning. Warm (max 25°C on Thu morning, min 17°C on Sat morning). Wind will be generally light.

Days 5-7 Weather Summary

Moderate rain (total 19mm), heaviest on Sun morning. Very mild (max 19°C on Sun morning, min 17°C on Sat night). Wind will be generally light.

Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
1
0
2
1
1
1
0
1
2
2
2
4
4
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
E
7
0.5
E
7
0.5
E
7
0.3
S
10
0.7
E
7
1.6
S
7
1
S
6
1.6
S
10
1.5
S
10
1.4
S
10
1.3
S
10
1.2
S
10
1.5
SSE
13
2.1
SSE
15
2.2
SSE
14
2.2
SSE
16
1.8
S
14
1.6
S
14
1.4
SSE
13
Wave Graph
Metric surfscale
Energy kJ
39
26
26
16
43
255
73
551
426
377
313
296
703
1822
1690
2247
1354
1004
690
Wind (km/h)
10
WSW
0
WSW
5
SE
10
NW
15
S
10
S
5
SSE
10
SSE
10
SE
10
E
10
SE
10
SSE
15
SE
15
SE
10
ESE
10
ESE
10
NE
5
SW
5
WSW
Wind State
cross
glassy
cross-on
cross-off
cross-on
on
on
on
on
cross
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-off
glassy
cross
High Tide
6:51AM0.89m
6:25PM0.85m
8:30AM0.79m
1:28PM0.82m
7:40PM0.75m
1:16PM0.93m
00:01AM0.78m
1:25PM1.04m
00:39AM0.91m
1:40PM1.14m
1:05AM1.05m
1:57PM1.22m
1:30AM1.18m
Low Tide
11:23PM0.42m
11:06AM0.67m
11:57PM0.52m
10:28AM0.77m
5:16PM0.72m
5:01AM0.47m
6:21PM0.62m
6:06AM0.35m
6:57PM0.51m
6:51AM0.22m
7:27PM0.41m
7:28AM0.10m
7:55PM0.34m
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
rain showers
light rain
part cloud
rain showers
light rain
light rain
light rain
light rain
light rain
light rain
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:26
6:26
6:24
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:51
5:51
5:51
5:52
5:52
5:52
 mm
2
1
2
2
4
2
2
4
1
2
2
Temp °C
21
25
25
25
22
21
18
18
18
18
19
18
17
17
17
18
19
19
19
Feels °C
22
26
27
24
22
20
19
18
18
18
19
18
16
16
16
18
20
21
21
  • 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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