Surf Forecasts:
Balneario Sao Jose surf forecast from 12 Sep 2026:
- Best quality surf: Monday 14 Sep, 6PM (local time) - 6ft (1.9m), 8s period, SE swell with cross-offshore winds.
- Most powerful swell: Monday 14 Sep, 3PM (local time) - 7ft (2.2m), 8s period, SE swell with 594 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 6AM (local time) - 1.5ft (0.5m), 11s 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 Saturday (Sep 12) at 6AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.4m and 4s. 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 2.2m 8s and forecast to arrive on Monday (Sep 14) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Tuesday (Sep 15) at 3AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Sat 12th Sep) | 1.5ft (0.5m) 11s |
| Best Surf | 6PM (Mon 14th Sep) | 6ft (1.9m) 8s |
| Most Powerful | 3PM (Mon 14th Sep) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, let’s break down the next couple weeks at Balneario Sao Jose here in Brazil.
The opening is a bit grim. You’ve got a few days of small, messy surf getting hammered by onshore winds. The waves exist, but the conditions are pretty ordinary. Saturday the 12th is a washout, and Sunday the 13th is even worse.
Monday the 14th morning goes glassy, but it’s only a 1.0m south swell with a short 7-second interval – weak stuff with only moderate energy (154). Not worth rushing for.
Honestly, the first week is a grind. The swell energy is weak to moderate, winds are all over the place, and water temps are about normal for the time of year.
But there’s one session that looks proper. Wednesday, September 25th is your target. Friday morning is glassy, with a solid 1.5m south swell running on a long 13-second period and packing strong energy (893). The wind is dead calm – glassy conditions – so you’re going to see clean, long lines. That’s a true groundswell, and even though it’s a beach/pier setup, that long period will make them hold up nicely. That’s the pick of the whole outlook.
The Monday, September 23rd morning also shows real promise. Glassy conditions again with a 1.3m south swell, 11-second period, and strong energy (409). That’s another one with “expect good surf” written all over it.
Into the final week, the swell hangs around but the winds get shifty again. The 1.5m south swell on the 25th is your clear best bet. After that it tails off but stays rideable.
Bottom line: don’t bother with the early stuff. Save your energy for that glassy Friday morning on the 25th. That’s the session.
Rusty.
Short Range ForecastHeavy rain (total 68mm), heaviest during Sat night. Warm (max 28°C on Fri night, min 18°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Mon night. Warm (max 21°C on Tue morning, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | ||||||||||||||
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 12 | S 11 | S 11 | S 7 | SSE 7 | S 8 | SE 6 | S 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 8 | S 7 | S 7 | S 12 | S 11 | S 9 |
Wave Graph  | |||||||||||||||||||
 kJ | 68 | 37 | 37 | 89 | 220 | 110 | 161 | 106 | 594 | 418 | 250 | 201 | 176 | 143 | 184 | 167 | 148 | 123 | 126 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | on | on | on | on | on | glassy | cross-on | cross-off | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross |
High Tide | 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 | 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 | |||||||
 |  |  |  |  | |  | | | |  | |  | | |  |  | | | |
 | — | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — |
mm | 7 | 1 | 4 | 18 | 9 | 10 | 9 | 1 | 9 | 1 | — | — | — | 2 | 2 | 2 | — | — | — |
Temp °C | 28 | 25 | 21 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 21 | 20 | 18 | 19 | 18 | 17 | 18 | 19 | 18 |
Feels °C | 30 | 27 | 22 | 20 | 20 | 20 | 20 | 20 | 19 | 20 | 20 | 20 | 19 | 18 | 17 | 16 | 17 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | E 5 | E 8 | E 8 | E 8 | SSE 7 | S 8 | SSE 9 | S 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | ESE 8 | S 7 | S 7 | S 7 | S 7 | S 9 |
| kJ | 13 | 28 | 29 | 33 | 220 | 110 | 17 | 106 | 355 | 418 | 250 | 201 | 176 | 143 | 107 | 167 | 108 | 66 | 126 |
Swell 2 Height (m) Direction Period (s) | S 12 | SSW 4 | S 11 | S 10 | ESE 8 | ESE 8 | S 14 | ESE 6 | SSE 12 | S 11 | S 10 | S 10 | S 10 | SSE 13 | ESE 9 | ESE 9 | S 12 | S 11 | ESE 10 |
| kJ | 68 | 5 | 37 | 18 | 19 | 11 | 16 | 33 | 49 | 86 | 88 | 70 | 71 | 131 | 161 | 161 | 148 | 123 | 11 |
Swell 3 Height (m) Direction Period (s) | E 8 | S 11 | SE 11 | — | — | SE 11 | — | ESE 9 | S 10 | — | — | SE 9 | SSE 15 | S 9 | S 12 | SSE 14 | ESE 9 | — | — |
| kJ | 18 | 37 | 5 | — | — | 5 | — | 15 | 8 | — | — | 21 | 21 | 40 | 184 | 38 | 88 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSW 4 | S 7 | — | ESE 5 | SE 6 | — | SE 8 | — | WSW 3 | SW 4 | SW 4 | S 5 | S 7 | — | — | ESE 9 | E 4 |
| kJ | — | — | 5 | 89 | — | 34 | 161 | — | 594 | — | 1 | 29 | 8 | 21 | 179 | — | — | 84 | 48 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 80 | 0 | 135 | 32 | 95 | 95 | 95 | 0 | 55 | 0 | 19 | 175 | 23 | 135 | 135 | 32 | 28 | 28 | 9 |
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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