Surf Forecasts:
Balneario Sao Jose surf forecast from 12 Sep 2026:
- Best quality surf: Friday 18 Sep, 9AM (local time) - 3.5ft (1.0m), 11s period, S swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 3PM (local time) - 5.5ft (1.7m), 11s period, SSE swell with 718 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 12PM (local time) - 1.5ft (0.4m), 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 12PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.5m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Balneario Sao Jose in the next 16 days are 1.7m 11s and forecast to arrive on Thursday (Sep 17) at 3PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sat 12th Sep) | 1.5ft (0.4m) 11s |
| Best Surf | 9AM (Fri 18th Sep) | 3.5ft (1.0m) 11s |
| Most Powerful | 3PM (Thu 17th Sep) | 5.5ft (1.7m) 11s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here, breakin' down Balneario Sao Jose for you.
Right off the bat, it’s flat and kinda meh. We got a south swell pumpin' but it’s a tiny 1 feet with a long period, so the energy's weak (66). The water is a touch warmer than usual for this time of year. The first few days just aren't worth it. You’re lookin' at a lot of poor to marginal surf through the end of the coming week with cross-onshore winds messin' it up.
Saturday morning the 12th might have a clean little wave, but it's too small to get stoked on. Sunday the 13th bumps up to 4 feet but with a short, weak period of 7 seconds and onshore wind, it'll be a choppy mess.
There's a dry spell of nothing really good until Friday the 25th of September. That's a long wait. That day shows a big groundswell from the SSE, pushin' 5 feet with a real long period of 16 seconds. The wave energy is strong (1429) – you'll feel that power in your chest. It's got a slight cross-shore wind from the ENE, so it'll have a bit of texture, but still clean enough. This is the one to circle on your calendar, but it's two weeks out, so don't book the time off just yet.
Right after that, Saturday the 26th is worth a look. The swell drops to 5 feet from the SSE, still with a nice long period of 13 seconds, but the wind goes glassy in the morning. That could be a proper clean session with fun waves, even though the energy is dropping (721).
So the story is: the first week and a half is a dud. Your best bet is the final weekend, specifically the 25th and 26th for a real chance at something good. Keep your fingers crossed.
Rusty.
Short Range ForecastHeavy rain (total 49mm), heaviest during Sat night. Warm (max 23°C on Sat morning, min 17°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Warm (max 20°C on Tue morning, min 17°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 11 | S 6 | S 7 | SSE 8 | S 6 | S 7 | SSE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | S 7 | SSE 8 | SSE 9 | SSE 11 | S 10 | S 11 | S 11 | SSE 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 37 | 37 | 123 | 186 | 143 | 86 | 124 | 108 | 311 | 239 | 206 | 153 | 129 | 163 | 251 | 348 | 718 | 259 | 240 | 188 | 139 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | on | cross-on | on | cross-on | cross-on | cross | cross | cross | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross | glassy | cross-on | cross-off |
High Tide | 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 | 6:17AM0.89m | 5:37PM0.86m | ||||||||
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 | 10:21AM0.67m | 11:04PM0.49m | |||||||
 |  |  | | |  | | |  |  | | | | | | | |  | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — |
 | — | 5:58 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | 2 | — | 25 | 4 | 5 | 5 | 2 | 4 | 2 | — | — | 1 | 2 | 2 | 1 | — | — | — | — | 2 | 2 |
Temp °C | 23 | 22 | 20 | 19 | 19 | 19 | 18 | 19 | 19 | 20 | 20 | 19 | 19 | 18 | 17 | 19 | 19 | 18 | 21 | 20 | 20 |
Feels °C | 24 | 22 | 21 | 20 | 20 | 21 | 17 | 19 | 21 | 20 | 21 | 20 | 19 | 18 | 16 | 18 | 17 | 17 | 21 | 21 | 23 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | S 6 | S 7 | SSE 8 | S 6 | S 7 | SSE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | S 7 | SSE 8 | SSE 9 | SSE 11 | S 10 | E 6 | ESE 7 | ESE 7 |
| kJ | 28 | 28 | 50 | 186 | 143 | 86 | 124 | 108 | 311 | 239 | 206 | 153 | 129 | 120 | 251 | 348 | 718 | 259 | 130 | 114 | 84 |
Swell 2 Height (m) Direction Period (s) | S 11 | S 11 | E 8 | ESE 8 | ESE 8 | S 14 | ESE 8 | E 5 | S 11 | S 10 | S 10 | SSW 6 | S 10 | ESE 8 | ESE 8 | ESE 8 | — | — | S 11 | S 11 | SSE 10 |
| kJ | 37 | 37 | 33 | 19 | 12 | 16 | 23 | 21 | 58 | 71 | 67 | 20 | 55 | 112 | 51 | 42 | — | — | 240 | 188 | 139 |
Swell 3 Height (m) Direction Period (s) | SSW 3 | SE 11 | S 10 | SE 11 | — | SSE 9 | SSE 13 | SSE 12 | — | — | — | S 10 | SSE 13 | S 12 | SE 8 | — | — | — | SSE 14 | SSE 14 | SSE 13 |
| kJ | 1 | 5 | 17 | 5 | — | 8 | 33 | 48 | — | — | — | 53 | 55 | 103 | 3 | — | — | — | 71 | 105 | 111 |
Wind waves Height (m) Direction Period (s) | — | SSW 3 | S 6 | — | — | ESE 5 | E 6 | — | — | WSW 4 | SSW 5 | — | S 6 | S 7 | — | ESE 8 | ESE 8 | E 5 | E 6 | — | — |
| kJ | — | 4 | 123 | — | — | 37 | 40 | — | — | 8 | 42 | — | 30 | 163 | — | 49 | 24 | 124 | 219 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 55 | 334 | 28 | 32 | 28 | 47 | 28 | 19 | 28 | 35 | 28 | 135 | 135 | 28 | 28 | 95 | 26 | 0 | 24 | 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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