Surf Forecasts:
Balneario Sao Jose surf forecast from 14 Sep 2026:
- Best quality surf: Sunday 20 Sep, 3AM (local time) - 7ft (2.1m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Sunday 20 Sep, 6AM (local time) - 7ft (2.2m), 8s period, E swell with 654 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 12PM (local time) - 3.5ft (1.1m), 7s 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 Monday (Sep 14) at 12PM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.4m and 12s. 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 2.2m 8s and forecast to arrive on Sunday (Sep 20) at 6AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Mon 14th Sep) | 3.5ft (1.1m) 7s |
| Best Surf | 3AM (Sun 20th Sep) | 7ft (2.1m) 8s |
| Most Powerful | 6AM (Sun 20th Sep) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, let’s get this out there.
First up, it’s a bit slow to start. The surf is pretty flat and messy for the next couple of days, with some onshore wind and small, weak swell, all under that 3-foot mark. It's not looking like a paddling session worth getting wet for just yet. But hey, that’s the nature of the game around here sometimes. We just gotta be patient. The good news is that the window opens up a bit near the end of the week.
The first real chance for a surf comes on Friday, the 18th of September. The morning is looking the cleanest with a glassy surface and a 3ft, 11-second period swell from the S. The energy is still pretty moderate, sitting at 422, but that glassy wind is a big plus. It might be a bit straight, but when it’s that clean, you can't complain too much. We’re talking Balneario Sao Jose here. The water’s on the warmer side, running about 3° above the norm, which is a touch on the comfy side for this time of year. After that, we get a bit of a lull again for the next day and a half, with mostly soft, weak waves.
Now, here’s where it starts to get interesting. The real standout is Sunday, the 20th of September. We’ve got the swell filling in a touch more to 6ft, with a period of 8 seconds from the E. It’s still short period, so it won’t be super clean, but the wind is forecast glassy for the afternoon, and the energy is cranking up to 775 which is strong enough to get some real push. This is the pick of the period. It’s a bit much for the beginners, being over 5 feet, but for the rest of us, it's game on. Saturday afternoon also looks pretty solid with 5ft and glassy conditions, so keep that in mind too.
The conditions look good for the start of the following week on Monday, the 21st, with the swell backing down to 4-5ft and a clean, cross-off wind. It’ll be fun but not as powerful as the weekend. After that, it slowly fades off again, turning pretty poor for the latter half of the week, with the energy dropping way down by the 26th. There is a glimmer on the 29th with a 5ft SE swell, but it’s a while off and more of a hopeful thing than a solid bet.
So, to sum it up, this is a wait-for-the-weekend kind of forecast. Make the most of the glassy Sunday afternoon, that's the one to be out for. It’ll be worth the wait.
Rusty
Short Range ForecastHeavy rain (total 31mm), heaviest during Mon afternoon. Very mild (max 19°C on Tue morning, min 17°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 24mm), heaviest during Sat afternoon. Warm (max 21°C on Fri morning, min 18°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | SSE 7 | S 7 | SSW 11 | S 10 | S 9 | SSE 8 | S 12 | S 12 | SSE 9 | S 13 | S 10 | S 11 | S 11 | SSE 11 | ESE 7 | ESE 8 | E 8 | ESE 8 | ESE 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 160 | 86 | 350 | 179 | 137 | 118 | 78 | 177 | 340 | 473 | 313 | 202 | 265 | 194 | 252 | 308 | 300 | 437 | 346 | 454 | 499 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross-on | glassy | on | on | cross-on | cross-on | cross | cross | glassy | on | glassy | cross | glassy | cross | cross-off | glassy | glassy |
High Tide | 3:55PM1.19m | 4:18AM1.27m | 4:17PM1.13m | 4:51AM1.16m | 4:39PM1.06m | 5:28AM1.03m | 5:04PM0.97m | 6:17AM0.89m | 5:37PM0.86m | 7:48AM0.78m | 1:15PM0.85m | 6:59PM0.75m | 1:00PM0.94m | 11:53PM0.78m | |||||||
Low Tide | 9:46AM0.24m | 9:38PM0.18m | 9:59AM0.35m | 9:59PM0.20m | 10:11AM0.46m | 10:21PM0.26m | 10:20AM0.56m | 10:43PM0.36m | 10:21AM0.67m | 11:04PM0.49m | 9:52AM0.76m | 5:00PM0.73m | 11:23PM0.63m | 4:39AM0.47m | 5:52PM0.61m | ||||||
 |  |  |  | |  |  | |  |  | | | | | | |  |  | |  | | |
 | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | 4 | 16 | 5 | — | — | — | 2 | 2 | 2 | — | — | — | — | — | 1 | 2 | 9 | 12 | 2 | 3 | 3 |
Temp °C | 18 | 18 | 17 | 19 | 19 | 18 | 19 | 19 | 18 | 19 | 19 | 18 | 21 | 21 | 19 | 19 | 20 | 21 | 23 | 24 | 22 |
Feels °C | 20 | 19 | 18 | 19 | 20 | 20 | 20 | 19 | 17 | 18 | 18 | 17 | 22 | 23 | 21 | 20 | 23 | 23 | 26 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | SSE 7 | S 7 | S 11 | S 10 | S 9 | SSE 8 | ESE 7 | S 12 | SSE 9 | S 13 | S 10 | S 11 | S 11 | ESE 7 | ESE 7 | S 10 | S 9 | SSE 9 | ESE 8 | ESE 8 | ESE 8 |
| kJ | 160 | 86 | 191 | 179 | 137 | 118 | 43 | 177 | 340 | 473 | 313 | 202 | 265 | 139 | 163 | 68 | 63 | 28 | 346 | 293 | 284 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | E 5 | SSE 9 | SE 9 | SE 8 | ESE 7 | S 8 | ESE 7 | ESE 11 | SE 8 | S 12 | SSE 14 | — | SSE 11 | S 10 | SSE 12 | S 14 | S 13 | S 12 | S 12 | S 11 |
| kJ | 24 | 11 | 68 | 61 | 53 | 37 | 51 | 31 | 13 | 3 | 77 | 73 | — | 194 | 100 | 15 | 4 | 28 | 25 | 25 | 9 |
Swell 3 Height (m) Direction Period (s) | SSE 13 | S 12 | E 5 | E 6 | E 8 | SSE 9 | S 12 | ESE 12 | SSE 15 | SSE 8 | — | — | — | — | SSE 13 | S 15 | — | — | SSE 9 | SE 9 | S 8 |
| kJ | 33 | 73 | 20 | 10 | 30 | 7 | 78 | 14 | 43 | 7 | — | — | — | — | 17 | 4 | — | — | 16 | 3 | 1 |
Wind waves Height (m) Direction Period (s) | SE 7 | — | SSW 11 | — | — | — | — | SE 8 | ESE 8 | ESE 5 | ESE 5 | E 6 | ESE 7 | — | ESE 7 | ESE 8 | E 8 | ESE 8 | — | E 8 | E 8 |
| kJ | 75 | — | 350 | — | — | — | — | 34 | 21 | 75 | 98 | 188 | 157 | — | 252 | 308 | 300 | 437 | — | 454 | 499 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 32 | 28 | 35 | 19 | 35 | 0 | 66 | 95 | 95 | 32 | 32 | 17 | 0 | 24 | 0 | 19 | 0 | 19 | 0 | 0 | 0 |
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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