Balneario Sao Jose Surf Break

Lat Long: 24.09° S 46.60° W

Balneario Sao Jose Surf Forecast and Surf Report

Issued: 8 am 13 Aug 2026 (local time)

Forecast update in  hr  min

Today's Balneario Sao Jose sea temperature is
20.9° C
1.7° 

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 13 Aug 2026:

  • Best quality surf: Monday 17 Aug, 12AM (local time) - 7.5ft (2.3m), 8s period, E swell with glassy winds.
  • Most powerful swell: Thursday 13 Aug, 12PM (local time) - 5ft (1.6m), 15s period, SSE swell with 1,063 kJ wave energy.
  • Next surfable swell (1★+): Friday 14 Aug, 12AM (local time) - 5ft (1.5m), 14s 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 (Aug 14) at 12AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.3m 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 1.6m 15s and forecast to arrive on Thursday (Aug 13) at 12PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Saturday (Aug 15) at 6AM.

Wave TypeTime (-03) & Date Wave Height & Period
Next good surf (1 star+)12AM (Fri 14th Aug)5ft (1.5m) 14s
Best Surf12AM (Mon 17th Aug)7.5ft (2.3m) 8s
Most Powerful12PM (Thu 13th Aug)5ft (1.6m) 15s

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


The Lowdown

Alright, folks, Rusty here. Let’s have a look at what’s cooking for Balneario Sao Jose over the next couple of weeks.

Alright, so the pattern across the whole run is a bit of a mixed bag, but there are a couple of windows of real promise. The water temp here is sitting at 70°, which is a touch warmer than normal for this time of year – not a major shift, but nice to feel that extra bit of warmth on your skin.

For the best of the best, you’ve got to circle Thursday, August 27th. The morning is the absolute standout window. We’re looking at a clean 6ft swell from the SSE with a solid 14-second period. That's a proper groundswell with some good energy behind it (combined energy of 1582). And the wind? Dead calm, glassy. You won’t find conditions much cleaner than that. The only thing to note is that at 6ft, that’s getting into the territory where it’s a bit much for the rookies, so more for the crew who know what they’re doing. The other strong shout is the very start of the run. Thursday, August 13th morning kicks things off with a nice 4ft swell from the south, 12-second period, glassy, and the water is that touch warmer than normal. Combined energy of 751 – decent punch for the size. This is a great window to get a score early on.

Let’s walk through it day by day. Thursday morning, the 13th, is clean and fun as I said. By the afternoon, the wind picks up a little and the conditions get a bit questionable. Friday morning the 14th looks clean again with a 4ft S swell, a good runner. Friday arvo, the onshores ruin it a bit. Saturday the 15th morning has a bit of size – 7ft from the SE – but the wind is cross-onshore, and the conditions are marginal. Not worth the battle. Sunday the 16th has a small glassy window in the morning, but that swell is short-period from the ESE (8 seconds), really weak and crumbly.

The first full week is a bit of a grind. A few clean mornings (Monday 17th, Tuesday 18th) with smaller, weak swell in the 3ft to 5ft range, but nothing to write home about. From Wednesday the 19th through to Monday the 24th, things turn pretty poor – lots of onshore winds, short periods, and small waves. We’re talking a solid six-day stretch where it’s really not worth paddling out. The energy levels drop right off (combined energy values hanging around 115 to 452).

Then things get interesting again towards the end. On Tuesday, August 25th, we see a pulse of size—7ft from the S, but with rain showers and a cross-on wind, it’s messy. The real gem is that Thursday the 27th morning I mentioned. Classic clean, head-high plus SSE groundswell. The combined energy of 1582 tells you there’s plenty of push. Friday the 28th morning also looks tidy with a 6ft swell from the ESE and clean, offshore wind, but the period is a short 8 seconds, so it’ll be a bit fat and quick.

To sum it up: the two main standouts to lock in are Thursday morning, August 13th for a clean, fun-sized session, and the absolute pick of the litter, Thursday morning, August 27th, for some excellent, glassy, solid groundswell. The rest of the days are mostly small, onshore, or just not worth getting wet for.

Stay frothy.
Rusty.

Short Range Forecast

Mostly dry. Warm (max 24°C on Thu morning, min 18°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 35°C on Tue morning, min 18°C on Tue night). Wind will be generally light.

Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
3
3
3
2
3
1
1
2
3
2
4
2
1
2
2
2
0
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)
1.2
S
12
1.6
SSE
15
1.5
S
14
1.3
S
13
1.4
SSE
13
1.7
SSE
14
1.5
SSE
13
1.1
S
12
1.6
ESE
7
1.9
ESE
8
1.9
ESE
8
2.3
E
8
1.6
ESE
9
1.5
ESE
9
1.3
ESE
9
1.2
ESE
9
1.1
ESE
9
0.9
ESE
8
0.7
E
8
1
S
7
1.3
SE
7
Wave Graph
Metric surfscale
Energy kJ
425
1021
849
564
690
1004
692
359
284
450
460
737
388
343
237
238
193
115
63
89
174
Wind (km/h)
5
SSW
5
S
5
W
0
SSW
10
SSE
10
E
20
E
20
E
5
ENE
5
ENE
10
ESE
5
WSW
5
S
10
SE
5
NNE
5
N
5
NE
20
SW
15
SW
15
SSW
5
WSW
Wind State
glassy
on
glassy
glassy
on
cross
cross
cross
cross
glassy
cross-on
glassy
glassy
cross-on
cross-off
cross-off
cross-off
cross
cross-on
cross-on
glassy
High Tide
3:26PM1.29m
3:06AM1.36m
3:50PM1.25m
3:38AM1.38m
4:14PM1.21m
4:11AM1.35m
4:37PM1.16m
4:44AM1.27m
5:00PM1.10m
5:19AM1.16m
5:24PM1.03m
5:59AM1.03m
5:50PM0.95m
Low Tide
9:24AM-0.05m
9:35PM0.40m
9:50AM0.01m
9:45PM0.38m
10:10AM0.09m
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
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
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>
6:33
6:33
6:33
6:31
6:31
6:30
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:47
5:47
5:49
5:49
5:49
5:50
5:50
 mm
Temp °C
24
24
19
21
21
20
22
21
20
24
23
20
25
24
24
35
35
30
20
19
19
Feels °C
25
26
20
23
22
22
22
20
22
25
25
23
27
26
26
35
35
29
20
19
22
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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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