Surf Forecasts:
Balneario Sao Jose surf forecast from 13 Sep 2026:
- Best quality surf: Monday 14 Sep, 6PM (local time) - 3ft (0.9m), 8s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 12PM (local time) - 5ft (1.6m), 12s period, SSE swell with 743 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 6AM (local time) - 3ft (0.9m), 7s 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 Monday (Sep 14) at 6AM. The primary swell is predicted to be 0.9m and 7s period with a secondary swell of 0.7m and 5s. 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 1.6m 12s and forecast to arrive on Thursday (Sep 17) 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 0.4m 2s period and expected on Saturday (Sep 19) at 9PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Mon 14th Sep) | 3ft (0.9m) 7s |
| Best Surf | 6PM (Mon 14th Sep) | 3ft (0.9m) 8s |
| Most Powerful | 12PM (Thu 17th Sep) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here again, but in feet and miles this time. Looking at Balneario Sao Jose over the next 16 days, and it starts off quiet. Sunday the 13th and Monday the 14th are a mess – rain and onshore wind ruining any chance of a wave.
The best bet is going to be Friday the 18th of September. That morning we’ve got glassy conditions with 3ft swell from the S, period at 11 seconds – that’s some proper groundswell energy. The combined energy is moderate at 360, and with the glassy wind, the surface will be clean as a whistle. This is the one to aim for.
Water temp is about average for the time of year, nothing unusual.
Saturday the 19th afternoon goes glassy again, but it’s only 3ft from the ESE and weak (177 energy). Surfable, but small.
Monday the 21st has clean cross-off winds and 3ft from the ESE, but the period is short at 8 seconds – not much push behind it.
Looking into the second week, Friday the 25th of September has a 4ft S swell with a long 13-second period (551 energy), but it’s got a light cross-onshore wind, so expect a bit of bump. That’s the best of the late window.
By the 28th, the energy dies off to almost nothing (98), and it’s back to poor surf.
Bottom line: Friday the 18th is the standout. Get on it while it’s glassy. After that, it’s a slow grind.
Rusty.
Short Range ForecastHeavy rain (total 55mm), heaviest during Sun afternoon. Very mild (max 19°C on Sat night, min 17°C on Mon afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Tue night. Warm (max 21°C on Fri morning, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | ||||||||||||||
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) | SSW 7 | S 8 | SSE 8 | S 7 | SSE 8 | S 12 | SE 8 | SE 9 | S 9 | S 8 | S 8 | S 8 | SSE 8 | SSE 10 | SSE 12 | S 11 | S 11 | S 11 | SSE 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 135 | 169 | 173 | 96 | 47 | 73 | 159 | 96 | 133 | 97 | 208 | 160 | 300 | 363 | 729 | 274 | 235 | 181 | 133 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | cross-off | cross | cross | cross-on | cross-on | glassy | on | on | cross-on | cross-on | cross-on | cross | glassy | cross-on | cross-off |
High Tide | 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 | 9:07PM0.23m | 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 | — | — | 6:03 | — | — | 6:03 | — | — | 6:01 | — | — | 6:01 | — | — | 6:00 | — | — |
 | — | — | 5:59 | — | — | 5:59 | — | — | 5:59 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — |
mm | 12 | 10 | 15 | 8 | — | 6 | 4 | — | — | 4 | 2 | 2 | — | — | — | — | — | 2 | 2 |
Temp °C | 19 | 18 | 18 | 18 | 19 | 18 | 18 | 19 | 18 | 18 | 18 | 18 | 17 | 19 | 19 | 18 | 21 | 20 | 19 |
Feels °C | 20 | 19 | 19 | 20 | 19 | 17 | 20 | 19 | 18 | 19 | 18 | 18 | 16 | 18 | 18 | 17 | 21 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 8 | SSE 8 | S 7 | ESE 6 | SSE 7 | SE 8 | SE 9 | S 9 | S 8 | S 8 | S 8 | SSE 8 | SSE 10 | SSE 12 | S 11 | E 6 | ESE 7 | ESE 7 |
| kJ | 64 | 169 | 173 | 96 | 35 | 52 | 159 | 91 | 133 | 97 | 208 | 160 | 300 | 363 | 729 | 274 | 115 | 139 | 114 |
Swell 2 Height (m) Direction Period (s) | E 8 | ESE 8 | ESE 8 | ESE 5 | SSW 7 | ESE 6 | S 11 | ESE 8 | ESE 8 | ESE 8 | E 8 | S 12 | E 8 | S 13 | ESE 11 | — | S 11 | S 11 | SSE 10 |
| kJ | 33 | 19 | 12 | 27 | 36 | 39 | 151 | 60 | 60 | 45 | 42 | 104 | 30 | 89 | 11 | — | 235 | 181 | 133 |
Swell 3 Height (m) Direction Period (s) | S 10 | SE 11 | SE 11 | ESE 9 | SSE 8 | S 12 | S 11 | S 10 | SSE 9 | SE 9 | S 13 | ESE 8 | ESE 12 | ESE 8 | — | — | ESE 10 | SSE 14 | SSE 12 |
| kJ | 17 | 5 | 5 | 15 | 47 | 73 | 146 | 96 | 50 | 39 | 82 | 34 | 14 | 19 | — | — | 10 | 71 | 61 |
Wind waves Height (m) Direction Period (s) | SSW 7 | — | — | — | — | SSW 7 | SW 5 | SSW 5 | — | — | — | — | — | — | ESE 8 | E 6 | — | — | — |
| kJ | 135 | — | — | — | — | 31 | 19 | 19 | — | — | — | — | — | — | 11 | 134 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 135 | 19 | 32 | 35 | 0 | 28 | 19 | 47 | 35 | 0 | 91 | 175 | 28 | 28 | 91 | 25 | 0 | 19 | 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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