Surf Forecasts:
Balneario Sao Jose surf forecast from 22 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 9AM (local time) - 5.5ft (1.7m), 14s period, SSE swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 9AM (local time) - 6ft (1.9m), 16s period, SSE swell with 1,752 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 6AM (local time) - 4.5ft (1.3m), 10s 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 Sunday (Aug 23) at 6AM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.2m and 7s. 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 16s and forecast to arrive on Wednesday (Aug 26) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Saturday (Aug 29) at 9AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sun 23rd Aug) | 4.5ft (1.3m) 10s |
| Best Surf | 9AM (Tue 25th Aug) | 5.5ft (1.7m) 14s |
| Most Powerful | 9AM (Wed 26th Aug) | 6ft (1.9m) 16s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's take a look at what's coming down the line for the next couple of weeks.
Right now, it's pretty flat and not really worth getting the board wet. We've got a few days of small, sloppy surf with onshore breezes that aren't doing us any favors. The first real window to paddle out doesn't show up until Tuesday the 25th of August, so there's a bit of a wait.
That Tuesday morning is where it starts to get good. We're looking at a solid 6ft of swell out of the SSE, with a long 14-second period pushing some real juice into the coast. The combined energy is a strong 1132, and the wind is dead calm – glassy conditions. This is the standout of the whole run. The water is sitting at a warm 70°, a touch above average for this time of year, which is a nice bonus. Balneario Sao Jose will be the spot that morning for the experienced crowd. The swell direction lines up perfectly with the optimum SE direction, so expect some clean, lined-up waves.
Wednesday the 26th is another ripper. The swell bumps up a touch to 6ft out of the SSE, with a very long 16-second period. We're talking very strong wave energy at 1786. Both the morning and afternoon look glassy, which is a huge positive. This is proper groundswell, and for a beach break, that long period could make it wall up a bit, but the conditions will be so clean it's hard to complain.
Thursday the 27th morning is worth setting the alarm for too. It drops a little to 5ft from the SSE with a 14-second period and calm, glassy conditions. The energy is still solid at 935 and the wind is coming from the west, which is offshore here. That's a recipe for some really clean, fun waves.
After that, the size and energy really start to fade through the end of August and into the first week of September. The wind stays light and sometimes glassy, but the swell drops off to under 3ft for most of it. There's a little pulse of 4ft on the morning of Thursday the 3rd of September, but the period is short at 8 seconds, so it won't have the same punch. The second week looks pretty quiet overall, with small, average conditions.
So to sum it up: if you want the best of it, you're looking at the 25th, 26th, and 27th of August. Tuesday morning the 25th is your best bet for the cleanest, most powerful waves. After that, you'll be hunting for smaller, weaker stuff.
Stay salty,
Rusty
Short Range ForecastLight rain (total 8mm), mostly falling on Sun afternoon. Warm (max 20°C on Sun morning, min 17°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed afternoon. Warm (max 25°C on Thu morning, min 19°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | S 11 | S 10 | S 10 | S 10 | S 10 | S 13 | S 14 | S 13 | SSE 14 | SSE 14 | S 13 | S 13 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 12 | ESE 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 507 | 461 | 392 | 319 | 360 | 764 | 1599 | 1443 | 1512 | 1122 | 782 | 539 | 1752 | 1652 | 1204 | 862 | 651 | 384 | 164 | 155 | 137 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross | on | on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross | glassy | glassy | glassy | glassy | cross-on | glassy | glassy | glassy | cross |
High Tide | 1:16PM0.93m | 00:01AM0.78m | 1:25PM1.04m | 00:39AM0.91m | 1:40PM1.14m | 1:05AM1.05m | 1:57PM1.22m | 1:30AM1.18m | 2:16PM1.29m | 1:56AM1.30m | 2:38PM1.34m | 2:25AM1.39m | 3:02PM1.36m | 2:55AM1.44m | |||||||
Low Tide | 6:21PM0.62m | 6:06AM0.35m | 6:57PM0.51m | 6:51AM0.22m | 7:27PM0.41m | 7:28AM0.10m | 7:55PM0.34m | 8:02AM0.01m | 8:23PM0.28m | 8:34AM-0.05m | 8:50PM0.24m | 9:04AM-0.06m | 9:15PM0.23m | ||||||||
 |  |  | |  |  | | |  | |  | | | | |  | |  | | | | |
 | 6:26 | — | — | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — |
 | — | 5:51 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — |
mm | — | — | — | — | 1 | 4 | 2 | — | 1 | — | 1 | 1 | — | 3 | 1 | — | — | — | — | — | — |
Temp °C | 19 | 19 | 17 | 20 | 19 | 18 | 17 | 17 | 17 | 20 | 20 | 19 | 21 | 20 | 20 | 25 | 24 | 22 | 33 | 33 | 28 |
Feels °C | 19 | 19 | 16 | 19 | 18 | 18 | 16 | 16 | 16 | 21 | 20 | 20 | 23 | 23 | 22 | 26 | 25 | 23 | 34 | 35 | 29 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 10 | S 10 | S 10 | S 10 | S 13 | S 14 | S 13 | SSE 14 | SSE 14 | S 13 | S 13 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | ESE 7 | ESE 8 | E 8 |
| kJ | 507 | 461 | 392 | 319 | 360 | 764 | 1599 | 1443 | 1512 | 1122 | 782 | 539 | 1752 | 1652 | 1204 | 862 | 651 | 384 | 128 | 155 | 137 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 7 | E 7 | E 7 | E 7 | — | — | — | — | — | SSE 17 | E 5 | — | ESE 6 | ESE 7 | ESE 7 | E 6 | SSE 12 | SSE 12 | SSE 11 |
| kJ | 19 | 10 | 9 | 4 | 1 | 1 | — | — | — | — | — | 313 | 34 | — | 50 | 73 | 62 | 76 | 164 | 109 | 69 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | SE 4 | — | — | — | E 4 | E 4 | E 5 | — | ESE 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 21 | — | — | — | 10 | 11 | 47 | — | 40 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 32 | 32 | 26 | 19 | 95 | 28 | 95 | 28 | 28 | 0 | 28 | 25 | 0 | 0 | 0 | 0 | 28 | 0 | 0 | 0 | 28 |
Best forecast wave conditions in São Paulo | |||||||||||||||||||||
Best forecast wave conditions in Brazil | |||||||||||||||||||||
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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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