Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 8 am 26 Aug 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
20.9°C
1.2° 

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 26 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 3PM (local time) - 6ft (1.9m), 15s period, SSE swell with glassy winds.
  • Most powerful swell: Thursday 27 Aug, 3AM (local time) - 6ft (1.9m), 15s period, SSE swell with 1,631 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 3PM (local time) - 6ft (1.9m), 15s period with SSE 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 Wednesday (Aug 26) at 3PM. The primary swell is predicted to be 1.9m and 15s period with a secondary swell of 0.4m and 5s. 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 1.9m 15s and forecast to arrive on Thursday (Aug 27) at 3AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Sunday (Aug 30) at 12AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Wed 26th Aug)6ft (1.9m) 15s
Best Surf 3PM (Wed 26th Aug)6ft (1.9m) 15s
Most Powerful 3AM (Thu 27th Aug)6ft (1.9m) 15s

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


The Lowdown

Alright, Rusty here, let’s talk about what’s shaping up down at Balneario Sao Jose.

First up, the water is a touch warmer than normal for this time of year, sitting at 70°, which is a nice little bonus for the sessions ahead.

The week kicks off proper on Wednesday, the 26th of August. We’ve got a solid 4ft groundswell from the SSE, pulsing with a very long 16-second period. The combined energy is pumping at a strong 1117 (moderate to strong wave energy). The wind is glassy, WSW at only 3 mph, so the surf is going to be clean and lined up. This is swell for experienced surfers, but it’s a standout window. Wednesday afternoon holds even better with the swell pushing to 6ft from the same direction, period at 15 seconds, and energy jumping to 1547. Still glassy with a light SE breeze. That afternoon session is the best on offer for the whole outlook – bigger, powerful, and absolutely clean.

Thursday morning, the 27th of August, keeps the quality going. Swell holds at 6ft, SSE, 14-second period, and the energy is 1336. Glassy conditions again with a light NE wind. This is another excellent session. The afternoon turns though; the wind swings east at 9 mph, becoming cross-onshore and choppy, so the window closes on Thursday afternoon.

Friday morning the 28th is cleaner but the swell drops in quality. We’re looking at 6ft, but the period drops to a short 8 seconds from the east, with energy at 721. The wind is light cross-offshore, so it’s rideable, but nothing special. Friday afternoon is smaller and choppy.

The weekend is a write-off. Saturday and Sunday are small, weak, and the wind is either onshore or cross-onshore. The energy drops to triple digits, and the swell is under 4ft. You’re better off doing something else.

Monday the 31st of August offers a tiny 2ft glassy morning, but it’s barely surfable. The energy is only 62.

Tuesday the 1st of September brings a small bump of 3ft from the east, with a 10-second period and energy of 246. The morning is clean with a light cross-offshore wind, but the afternoon gets hammered by 16 mph SSW winds and rain. Not worth it.

The following week has a few bright spots, but it’s less certain. Wednesday the 2nd of September shows a 5ft SSE swell in the morning, but the wind is cross-onshore, so conditions are messy. The afternoon looks better with a 5ft swell and a longer 11-second period, but still cross-onshore.

Thursday the 3rd is marginal at best, with onshore winds ruining the 4ft swell.

Now, Friday the 4th of September is a wildcard. We’ve got a 7ft SSE swell, period of 11 seconds, and energy at 1549. That’s a lot of power. But the wind is onshore at 9 mph, and there’s light rain. For experts only, and even then, the wind could make it a messy, powerful beast. If it cleans up, it’s a standout, but it’s a long-range call so keep your fingers crossed.

The rest of the second week sees small, weak swells with occasional clean windows. Sunday the 6th of September afternoon has a glassy 5ft from the east, period of 6 short seconds, but it’s surfable. Monday the 7th morning is glassy with a 4ft swell. The real glimmer is Wednesday the 9th of September morning: 5ft from the ESE, 8-second period, but with glassy conditions and energy at 503. That’s a very clean, fun session. Thursday the 10th of September morning is also glassy, but the swell is only 2ft, though it’s a long-period 15-second groundswell from the SE, better for the points and reefs around here, but for the beach/pier setup it might be a bit too straight.

Overall, the standout hands down is Wednesday afternoon, the 26th of August. Big 6ft groundswell, long period, glassy wind, and a high energy reading. That’s the one to circle. The back-up is Thursday morning, the 27th. After that, the long-range Friday the 4th of September has the size but needs the wind to play ball.

Rusty out.

Short Range Forecast

Mostly dry. Warm (max 30°C on Fri morning, min 20°C on Wed morning). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 37°C on Sat morning, min 20°C on Sat night). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
4
4
4
4
2
3
3
1
2
1
1
0
0
0
1
0
0
0
2
0
0
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
SSE
16
1.9
SSE
15
1.9
SSE
15
1.7
SSE
14
1.5
SSE
14
1.2
SSE
13
1.8
E
8
1.3
E
8
1.2
E
7
1.1
E
8
1.1
E
8
0.9
E
8
0.8
E
9
0.8
ESE
9
0.7
E
9
0.6
E
8
0.9
S
7
0.8
E
9
0.8
ESE
10
0.8
E
10
1.1
SSE
5
Wave Graph
Metric surfscale
Energy kJ
688
1540
1567
1158
874
461
358
196
155
138
161
105
99
106
76
52
81
106
136
127
66
Wind (km/h)
5
W
5
SE
5
NE
5
E
15
E
10
NE
5
NE
5
ESE
10
NNE
15
N
5
NW
20
SW
10
SSW
15
SSW
0
NW
5
S
5
SSE
10
SW
10
NNE
25
SSW
10
S
Wind State
glassy
glassy
cross-off
glassy
cross
cross-off
cross-off
cross-on
cross-off
cross-off
glassy
cross
cross-on
cross-on
glassy
on
on
cross
cross-off
cross-on
cross-on
High Tide
2:16PM1.29m
1:56AM1.30m
2:38PM1.34m
2:25AM1.39m
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
Low Tide
8:23PM0.28m
8:34AM-0.05m
8:50PM0.24m
9:04AM-0.06m
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
part cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
part cloud
clear
part cloud
part cloud
part cloud
part cloud
cloud
heavy rain
heavy rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:22
6:22
6:20
6:20
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:52
5:52
5:52
5:53
5:53
5:53
5:54
 mm
16
17
4
Temp °C
22
22
21
25
24
22
30
28
28
37
37
32
24
22
22
25
22
21
22
20
19
Feels °C
23
24
22
25
24
24
30
30
27
36
37
31
24
23
24
27
24
22
24
19
19
  • 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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