Surf Forecasts:
Balneario Sao Jose surf forecast from 8 Sep 2026:
- Best quality surf: Monday 14 Sep, 9PM (local time) - 8ft (2.5m), 8s period, ESE swell with glassy winds.
- Most powerful swell: Sunday 13 Sep, 9PM (local time) - 8ft (2.4m), 11s period, SSE swell with 1,375 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 6AM (local time) - 3.5ft (1.1m), 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 Tuesday (Sep 08) at 6AM. The primary swell is predicted to be 1.1m and 10s period with a secondary swell of 1.0m and 6s. Another secondary swell of 1.3m and 6s is also forecast. 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 2.4m 11s and forecast to arrive on Sunday (Sep 13) at 9PM. 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 3s period and expected on Friday (Sep 11) at 12AM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6AM (Tue 8th Sep) | 3.5ft (1.1m) 10s |
| Best Surf | 9PM (Mon 14th Sep) | 8ft (2.5m) 8s |
| Most Powerful | 9PM (Sun 13th Sep) | 8ft (2.4m) 11s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here, switching over for the imperial crew.
We’ve got a mixed bag of conditions for Balneario Sao Jose over the next couple of weeks. The first few days actually look promising, but there’s a decent stretch of onshore and messy stuff in the middle that you’ll want to dodge. The real standout windows are concentrated around Tuesday the 8th and then again around the 15th of September.
Kicking off on Tuesday the 8th, we’re in for a treat. Morning brings a glassy 4ft swell from the S, with a period of 10 seconds off that exposed beach/pier setup. The combined energy is a moderate 338, and with the wind glassed off, it’s going to feel super clean. The afternoon holds onto clean lines with a 3ft swell, though the wind turns cross-on.
Wednesday the 9th offers a solid option. The morning has a clean, cross-off 4ft swell from the ESE (8 seconds, 270 energy), and the afternoon goes glassy again with 3ft. Both windows are good for a session.
Thursday the 10th and Friday the 11th are your other early standouts. Expect clean conditions with 3ft S swell (12-13 seconds, 263-289 energy) on Thursday, turning glassy by the afternoon. Friday morning is also clean with 3ft swell, but the afternoon drops to 2ft with light cross-off winds.
Now, here’s the rough patch. From Saturday the 12th right through to the 17th and into part of the 18th, we’re hit with onshore winds, heavy rain, and generally poor to marginal surf. The swell gets bigger, especially around Sunday the 13th with 6ft to 6ft S swell (11 seconds, over 900 energy), but the cross-onshore wind and heavy rain ruin the quality. This period is best left alone for paddle surfing. It gets big and bumpy, making it look more like a kite session than a clean surf day.
The real gem of the whole outlook lands on Tuesday the 15th of September. This is the standout session. Morning brings a very good forecast with a 6ft ESE swell (9 seconds, 729 energy) and offshore wind from the N. Then the afternoon drops to 5ft but turns glassy with 8 seconds and 570 energy. Clean, well-shaped, and decent size. If you’re only picking one day, make it this Tuesday.
After that, Wednesday the 16th offers glassy and clean 3ft SSE groundswell (12 seconds, 428-465 energy) in the afternoon. The 20th of September morning also shapes up nicely with glassy conditions and a 4ft ESE swell (8 seconds, 334 energy). The very tail end on Monday the 21st gives us clean 2ft to 4ft swell, but it’s small.
Water temp is about average for the time of year here, nothing crazy unusual.
A quick note on crowds: this spot tends to be busy often, so if you’re hitting the glassy windows, expect company but the quality will be worth it.
Rusty.
Short Range ForecastHeavy rain (total 63mm), heaviest during Wed morning. Warm (max 22°C on Thu morning, min 16°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 67mm), heaviest during Sun morning. Warm (max 29°C on Fri afternoon, min 17°C on Sat afternoon). Wind will be generally light. | ||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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 10 | S 10 | S 10 | ESE 7 | ESE 8 | ESE 8 | SSE 12 | S 12 | S 13 | S 15 | S 13 | S 12 | E 8 | E 8 | S 6 | S 10 | S 11 | SSE 11 | SSE 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 290 | 265 | 208 | 147 | 168 | 127 | 195 | 180 | 202 | 163 | 225 | 151 | 76 | 43 | 92 | 646 | 836 | 870 | 843 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | cross-on | glassy | cross-off | glassy | glassy | cross-off | glassy | off | cross-off | cross-off | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 00:41AM1.00m | 1:52PM1.26m | 1:11AM1.16m | 2:09PM1.29m | 1:42AM1.29m | 2:29PM1.30m | 2:13AM1.38m | 2:51PM1.30m | 2:44AM1.43m | 3:12PM1.27m | 3:15AM1.42m | 3:34PM1.24m | |||||||
Low Tide | 7:22AM0.05m | 7:58PM0.39m | 7:58AM-0.02m | 8:21PM0.35m | 8:28AM-0.04m | 8:39PM0.31m | 8:54AM-0.01m | 8:54PM0.27m | 9:15AM0.05m | 9:07PM0.23m | 9:32AM0.14m | 9:21PM0.19m | |||||||
 |  | |  |  |  |  |  | | | |  | | | |  | | | | |
 | — | 6:11 | — | — | 6:09 | — | — | 6:07 | — | — | 6:07 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | — | 5:57 | — | — | 5:57 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:59 | — |
mm | 1 | — | — | 5 | 31 | 8 | 8 | 2 | 8 | 5 | — | — | 4 | 6 | 2 | 11 | 21 | 18 | 28 |
Temp °C | 17 | 18 | 18 | 18 | 20 | 21 | 21 | 22 | 22 | 22 | 25 | 29 | 29 | 19 | 18 | 18 | 17 | 17 | 18 |
Feels °C | 17 | 18 | 19 | 20 | 22 | 23 | 23 | 25 | 26 | 24 | 28 | 32 | 31 | 17 | 17 | 18 | 16 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | ESE 8 | S 12 | S 13 | E 8 | S 13 | S 12 | E 8 | E 8 | E 8 | S 10 | S 11 | SSE 11 | SSE 11 |
| kJ | 290 | 265 | 108 | 147 | 168 | 127 | 94 | 180 | 202 | 60 | 225 | 151 | 76 | 43 | 43 | 646 | 836 | 870 | 843 |
Swell 2 Height (m) Direction Period (s) | ESE 5 | ESE 6 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 12 | ESE 8 | ESE 7 | S 12 | E 8 | E 5 | S 12 | S 11 | S 11 | E 8 | ESE 9 | ESE 9 | — |
| kJ | 32 | 73 | 208 | 125 | 98 | 74 | 195 | 75 | 57 | 103 | 57 | 15 | 68 | 37 | 20 | 50 | 26 | 16 | — |
Swell 3 Height (m) Direction Period (s) | ESE 8 | — | SSW 10 | SE 12 | S 15 | SSE 14 | E 14 | SE 14 | SSE 17 | S 15 | SE 13 | E 8 | SE 12 | SE 12 | — | — | — | — | — |
| kJ | 6 | — | 33 | 39 | 4 | 37 | 4 | 8 | 57 | 163 | 7 | 30 | 6 | 5 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ESE 5 | — | — | — | — | — | — | — | — | NE 3 | — | — | — | SW 3 | S 6 | — | E 9 | E 9 | ESE 6 |
| kJ | 64 | — | — | — | — | — | — | — | — | 2 | — | — | — | 6 | 92 | — | 53 | 38 | 176 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 0 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 34 | 175 | 175 | 55 | 95 | 95 | 91 |
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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