Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 2 am 11 Sep 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
21.1°C
1.3° 

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 11 Sep 2026:

  • Best quality surf: Monday 14 Sep, 9AM (local time) - 7.5ft (2.3m), 8s period, SE swell with glassy winds.
  • Most powerful swell: Tuesday 15 Sep, 9AM (local time) - 8ft (2.4m), 9s period, SSE swell with 965 kJ wave energy.
  • Next surfable swell (1★+): Friday 11 Sep, 9PM (local time) - 2ft (0.6m), 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 Friday (Sep 11) at 9PM. The primary swell is predicted to be 0.6m and 12s period with a secondary swell of 0.1m and 12s. Another secondary swell of 0.8m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Balneario Sao Jose in the next 16 days are 2.4m 9s and forecast to arrive on Tuesday (Sep 15) at 9AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Sep 15) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 9PM (Fri 11th Sep)2ft (0.6m) 12s
Best Surf 9AM (Mon 14th Sep)7.5ft (2.3m) 8s
Most Powerful 9AM (Tue 15th Sep)8ft (2.4m) 9s

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


The Lowdown

Righto, surf’s up… or it will be. Let’s be straight with you – the next few days are a bit of a write-off. We’ve got a poor run of conditions with onshore winds and lumpy, sloppy surf. But don’t go hanging up the wettie just yet. There’s a real window of opportunity coming in the middle of next week that looks like the pick of the bunch. It’s a waiting game, but it should be worth it.

The first proper call is Monday morning, September 14th down at Balneario Sao Jose. The ocean finally turns it on. We’ve got a clean 8ft of SE swell pushing through, with a period of 8 seconds. The wind is dead glassy, and the water is a touch warmer than normal for this time of year at 70°. The wave energy is moderate, sitting at 682. This is the standout – clean, decent size, and your best chance for a proper session.

Later that Monday afternoon, the swell backs off a touch to 7ft but the wind swings onshore, making it a bit mushier. Still surfable, but the morning is the go.

The swell builds again for Tuesday morning, September 15th. We’re looking at 8ft of SSE swell with a period of 9 seconds. The energy is cranking – strong at 1038. But the wind is cross-shore, so it’ll be a bit lumpy. Still, there’s power there for the taking. This is the other one to keep an eye on, especially if you don’t mind a bit of chop.

After that, it fades into smaller, messier surf for the rest of the week. The energy drops right off, and we’re back to onshores and poor conditions through to September 21st. A flat spell, really. There’s a little bump of 4ft with clean winds on Friday morning the 18th, but it’s nothing to get too excited about. Then things shut down again.

Now, looking further out, there’s a pulse of energy for the 23rd of September. But before you get your hopes up – the wind is howling at 19 mph from the SSW, and it’s going to be a messy, lumpy mess. The swell is 6ft and the energy is moderate, but the conditions are poor. This one's looking more like a challenge than a treat. However, keep an eye on the afternoon of that Wednesday – the swell jumps to 8ft and the wind eases, but it’s still cross-shore. It could be a wild one, but the energy is very strong at 2435. That’s a lot of water moving. For the experienced crew, that could be interesting. For the rest of us, maybe a pass.

The last week of the outlook is a mixed bag. There’s a small clean window with a 4ft SSE groundswell on the morning of September 25th, but the wind is a bit cross. It’s not a standout, just a “maybe” session.

So, to sum it up: Your best bets are Monday morning the 14th and Tuesday morning the 15th. Anything else is a gamble. It’s a waiting game, but when it turns on, it turns on.

Rusty

Short Range Forecast

Heavy rain (total 68mm), heaviest during Sat night. Warm (max 27°C on Fri afternoon, min 18°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Heavy rain (total 34mm), heaviest during Mon night. Warm (max 21°C on Mon morning, min 17°C on Wed night). Wind will be generally light.

Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
1
1
0
0
0
1
1
1
3
2
2
3
2
2
1
0
0
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
S
13
0.7
S
12
0.5
S
12
0.4
S
11
1
S
5
1.2
S
7
1.5
S
8
1.2
S
8
1.9
SE
7
2.3
SE
8
2
SE
8
1.6
SE
8
2.4
SSE
9
2.1
SE
9
1.6
SE
9
0.8
SSE
13
0.8
SSE
12
0.8
S
11
0.7
S
12
0.9
S
12
1.2
S
11
Wave Graph
Metric surfscale
Energy kJ
225
148
68
37
42
156
298
195
331
649
527
346
965
715
399
230
189
151
148
232
358
Wind (km/h)
5
ENE
5
ENE
5
W
5
SSW
10
SSW
10
ESE
10
SE
10
SSE
10
E
5
NE
10
WSW
15
W
15
SW
10
SW
0
E
10
SW
15
S
15
SE
15
ESE
10
E
15
ENE
Wind State
glassy
cross
cross-off
cross-on
cross-on
cross-on
cross-on
on
cross
glassy
cross
cross-off
cross
cross
glassy
cross
cross-on
on
cross-on
cross-on
cross
High Tide
2:51PM1.30m
2:44AM1.43m
3:12PM1.27m
3:15AM1.42m
3:34PM1.24m
3:47AM1.36m
3:55PM1.19m
4:18AM1.27m
4:17PM1.13m
4:51AM1.16m
4:39PM1.06m
5:28AM1.03m
5:04PM0.97m
Low Tide
8:54PM0.27m
9:15AM0.05m
9:07PM0.23m
9:32AM0.14m
9:21PM0.19m
9:46AM0.24m
9:38PM0.18m
9:59AM0.35m
9:59PM0.20m
10:11AM0.46m
10:21PM0.26m
10:20AM0.56m
10:43PM0.36m
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thunderstorm
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thunderstorm
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heavy rain
mod rain
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mod rain
light rain
mod rain
heavy rain
light rain
rain showers
rain showers
rain showers
rain showers
mod rain
light rain
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:05
6:05
6:03
6:03
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:58
5:58
5:59
5:59
5:59
6:00
6:00
 mm
1
1
6
3
2
26
9
11
9
1
6
11
2
1
1
1
3
8
2
Temp °C
26
27
25
24
19
19
18
19
19
21
20
18
19
19
19
20
19
17
17
18
18
Feels °C
28
30
28
27
20
21
19
19
20
23
21
18
20
20
21
19
18
16
15
17
17
  • Map Icons:
  • Break
  • 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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