Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 2 pm 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
20.8°C
1.1° 

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 29 Aug 2026:

  • Best quality surf: Wednesday 2 Sep, 6AM (local time) - 11ft (3.5m), 12s period, S swell with onshore winds.
  • Most powerful swell: Wednesday 2 Sep, 6AM (local time) - 11ft (3.5m), 12s period, S swell with 3,181 kJ wave energy.
  • Next surfable swell (1★+): Saturday 29 Aug, 12AM (local time) - 4ft (1.2m), 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 Saturday (Aug 29) at 12AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.5m and 11s. 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 3.5m 12s and forecast to arrive on Wednesday (Sep 02) at 6AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Tuesday (Sep 01) at 3PM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12AM (Sat 29th Aug)4ft (1.2m) 7s
Best Surf 6AM (Wed 2nd Sep)11ft (3.5m) 12s
Most Powerful 6AM (Wed 2nd Sep)11ft (3.5m) 12s

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


The Lowdown

G’day, I’m Rusty. Let’s break down what’s happening at Balneario Sao Jose.

Alright, the next couple of weeks are a mixed bag for this beach and pier spot. The surf is pretty slow for the first few days, with the real energy not showing up until the start of September. There’s a massive pulse of swell forecast for Wednesday the 2nd that’s going to be way too strong for this area, but the best window for a decent session looks like it’s building from the end of the first week into the second. The water here is sitting at 69° right now, and feels a touch warmer than usual for this time of year.

Right now, on Friday the 28th of August, it’s a bit of a write-off. We’ve got weak 2 ft swell from the SSE with a long period of 12 seconds, but the wind is a light cross-onshore and the energy is weak (284). The weekend is small too – Saturday morning the 29th has a short period 3 ft easterly swell with glassy offshore NNW wind, which will be clean, but the waves are ordinary. Sunday the 30th and Monday the 31st are flat and messy. Tuesday the 1st of September shows a small 2 ft east swell going glassy in the morning, which is nice for a splash, but nothing special.

Now, Wednesday the 2nd of September is a real beast, but it’s not for us. A solid 10 ft southerly groundswell hits in the morning, with a period of 12 seconds, and the energy is pumping at 4264. It’s an exposed break, but that’s just too big for this beach and pier setup – experts only, and even then, it’s likely a washing machine. The afternoon drops to 7 ft but it’s still hefty. Thursday the 3rd calms down to a cleaner 5 ft SSE swell with glassy morning winds – that’s the best you’ll see during the first week, and it’s surfable for most. The water looks alright, and the crowd profile says it’s ‘often’ busy, so don’t expect a solo session.

The second week shows a bit more consistency but nothing that screams must-do session. Friday the 4th is a tiny 3 ft glassy morning, and the weekend has some pulse – Saturday the 5th has a short period 4 ft S swell with dead calm winds, but it’s ordinary. Sunday the 6th picks up to 6 ft SSE with a solid 12-second period, but cross-onshore winds mess it up. The energy is moderate (1007). Monday the 7th is marginal but Tuesday the 8th morning looks the pick of the second week – a glassy 4 ft SSE swell with 12-second period, dead calm, and the energy is solid (512). That’s your best bet if the early window doesn’t work. After that, it’s a steady run of around 5 ft to 7 ft SSE swell from the 10th to the 12th of September, but winds are mostly cross or cross-onshore, so the quality is marginal. The standout is Saturday the 12th morning – 7 ft SSE swell, 12-second period, glassy calm, and good energy (1261). That’s going to be excellent for experienced surfers, but it’s a beast at over 6 ft, so leave the beginners on the sand.

Overall, the first week is a slow burn with a huge spike mid-week that’s too big. The best bet is Thursday the 3rd morning for a clean 5 ft swell, or if you can wait, Tuesday the 8th morning and Saturday the 12th morning are your true standouts for clean, glassy conditions with decent size.

Rusty

Short Range Forecast

Mostly dry. Warm (max 35°C on Sat morning, min 19°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 31mm), heaviest during Tue afternoon. Warm (max 22°C on Tue morning, min 15°C on Wed night). Wind will be generally light.

Fri
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
Thursday
3
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
1
0
0
0
0
1
0
0
0
1
1
1
!
2
2
2
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
E
7
1.2
E
7
1
E
7
0.9
ESE
7
0.8
ESE
8
0.7
ESE
8
0.7
ESE
8
0.7
E
9
0.6
E
9
0.5
E
9
0.7
E
9
0.7
E
9
0.8
E
9
0.9
S
7
3
S
12
2.2
S
12
1.8
S
11
1.5
SSE
10
1.4
SSE
9
1
SSE
9
Wave Graph
Metric surfscale
Energy kJ
145
134
103
91
75
63
73
76
55
39
74
81
113
76
2460
1332
748
399
307
173
Wind (km/h)
5
ESE
5
NNE
10
NNW
15
SSW
15
WSW
5
SSW
10
S
5
N
5
ENE
15
SW
5
SW
5
NNE
10
W
5
SSE
15
SSE
15
S
5
E
5
E
10
SE
5
N
Wind State
cross-on
glassy
off
cross-on
cross
cross-on
cross-on
glassy
cross
cross-on
cross-on
glassy
cross-off
glassy
on
on
cross-on
glassy
cross-on
glassy
High Tide
3:02PM1.36m
2:55AM1.44m
3:29PM1.36m
3:28AM1.45m
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
Low Tide
9:15PM0.23m
9:33AM-0.03m
9:38PM0.23m
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
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
rain showers
heavy rain
heavy rain
rain showers
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:18
6:18
6:18
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:53
5:53
5:53
5:54
5:54
5:54
 mm
2
12
16
1
Temp °C
28
28
35
29
21
24
22
21
27
21
21
22
20
18
18
18
17
19
19
17
Feels °C
29
27
34
30
23
25
24
24
27
22
23
24
21
19
16
15
16
18
18
17
  • 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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