Surf Forecasts:
Balneario Sao Jose surf forecast from 23 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 3AM (local time) - 4.5ft (1.3m), 12s period, S swell with glassy winds.
- Most powerful swell: Wednesday 26 Aug, 9AM (local time) - 6ft (1.9m), 16s period, SSE swell with 1,730 kJ wave energy.
- Next surfable swell (1★+): Wednesday 26 Aug, 3AM (local time) - 4.5ft (1.3m), 12s 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 Wednesday (Aug 26) at 3AM. The primary swell is predicted to be 1.3m and 12s period with a secondary swell of 0.9m and 16s. Another secondary swell of 1.1m and 5s 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 1.9m 16s and forecast to arrive on Wednesday (Aug 26) at 9AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Saturday (Aug 29) at 12PM.
| Wave Type | Time (-03) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Wed 26th Aug) | 4.5ft (1.3m) 12s |
| Best Surf | 3AM (Wed 26th Aug) | 4.5ft (1.3m) 12s |
| Most Powerful | 9AM (Wed 26th Aug) | 6ft (1.9m) 16s |
Table - best surf conditions forecast for Balneario Sao Jose over the next 16 days.
The Lowdown
Alright, Rusty here, let’s talk about what’s shaping up at Balneario Sao Jose.
The next week or so has a bit of a slow start, but there is a really sweet window on Wednesday, August 26th, that will get the blood pumping. The water's sitting at 69.9°, which is a touch warmer than what we normally get around here, so that’s a nice bonus.
For the first couple of days, it’s pretty average. Sunday the 23rd has a small 4.3ft swell from the S with a period of 10 seconds, but the ESE wind is cross-on, spoiling it. Monday the 24th actually pushes up to 6.6ft of S swell, with a long 14-second period, so there’s decent energy, but that SE wind keeps things cross-on and choppy. Not a total dud, but not really clean.
Tuesday the 25th is a bit of a washout. The morning has 5.6ft from the SSE with decent period, but that cross-shore wind just adds bumps. The story changes Wednesday morning the 26th. We are looking at a 6.2ft groundswell from the SSE, period of 16 seconds, bringing in a serious chunk of energy. The wind goes completely dead, glassy. This is the standout. The waves will have power and shape, but with that size and long period, this is strictly for experienced surfers. The beach setup means those long-period groundswells might pitch a little fast, so pick your line.
Thursday morning the 27th holds on nicely, with 5.2ft SSE swell and a glassy start from a light NW wind. It won't be as powerful as Wednesday, but still fun for the skilled crew. The afternoon gets a clean offshore wind from the S, but the swell drops a touch.
Friday the 28th morning gives us a nice surprise: 4.9ft from the E, but with a short 7-second period. The wind is glassy though, making it clean and rideable. The energy is moderate. For the rest of that week and into the end of August and start of September, the window closes. You get small, knee-high dribblers and choppy conditions through the weekend and into the start of September. Nothing worth paddling out for until Tuesday, September 1st, when a little pulse of 4.3ft SSE swell arrives with some clean cross-offshore wind from the W, but the period is a short 7 seconds, so it’s very ordinary.
The first week of September looks flat and messy. There is a brief chance on Friday the 4th of September with some glassy 4.6ft SE swell, and Saturday the 5th has glassy 3ft waves, but it’s small and the energy is low. Overall, for the 16-day run, the only true standout is that Wednesday the 26th morning. Get on it if you can.
Short Range ForecastModerate rain (total 11mm), heaviest on Sun night. Warm (max 20°C on Sun morning, min 17°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 31°C on Fri afternoon, min 19°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 10 | S 10 | S 13 | S 14 | S 13 | SSE 14 | SSE 14 | SSE 13 | S 12 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | SSE 12 | SSE 12 | ESE 8 | E 8 | E 8 | ESE 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 314 | 353 | 764 | 1599 | 1421 | 1512 | 1090 | 946 | 522 | 1730 | 1609 | 1358 | 988 | 704 | 454 | 236 | 142 | 143 | 124 | 147 | 123 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | glassy | cross-on | glassy | glassy | on | cross-off | glassy | cross | cross-off | off | cross-off | off |
High Tide | 1:25PM1.04m | 00:39AM0.91m | 1:40PM1.14m | 1:05AM1.05m | 1:57PM1.22m | 1:30AM1.18m | 2:16PM1.29m | 1:56AM1.30m | 2:38PM1.34m | 2:25AM1.39m | 3:02PM1.36m | 2:55AM1.44m | 3:29PM1.36m | ||||||||
Low Tide | 6:57PM0.51m | 6:51AM0.22m | 7:27PM0.41m | 7:28AM0.10m | 7:55PM0.34m | 8:02AM0.01m | 8:23PM0.28m | 8:34AM-0.05m | 8:50PM0.24m | 9:04AM-0.06m | 9:15PM0.23m | 9:33AM-0.03m | 9:38PM0.23m | ||||||||
 |  |  |  | |  |  | |  | | | | |  |  | | | | | | | |
 | 6:26 | — | — | 6:24 | — | — | 6:24 | — | — | 6:22 | — | — | 6:22 | — | — | 6:20 | — | — | 6:20 | — | — |
 | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:52 | — | — | 5:53 | — |
mm | — | — | 3 | 2 | 1 | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 19 | 18 | 17 | 17 | 18 | 20 | 20 | 20 | 20 | 22 | 20 | 25 | 24 | 22 | 30 | 31 | 29 | 40 | 40 | 29 |
Feels °C | 19 | 18 | 18 | 16 | 16 | 18 | 20 | 20 | 22 | 22 | 24 | 22 | 26 | 25 | 24 | 31 | 32 | 28 | 36 | 38 | 28 |
Swell 1 Height (m) Direction Period (s) | S 10 | S 10 | S 13 | S 14 | S 13 | SSE 14 | SSE 14 | SSE 13 | S 12 | SSE 16 | SSE 15 | SSE 15 | SSE 14 | SSE 14 | SSE 13 | ESE 7 | SSE 12 | ESE 8 | E 8 | E 8 | ESE 9 |
| kJ | 314 | 353 | 764 | 1599 | 1421 | 1512 | 1090 | 946 | 522 | 1730 | 1609 | 1358 | 988 | 704 | 454 | 105 | 142 | 143 | 124 | 147 | 123 |
Swell 2 Height (m) Direction Period (s) | E 7 | E 7 | E 7 | — | S 16 | — | — | — | SSE 16 | S 11 | — | — | ESE 6 | ESE 7 | E 7 | SSE 12 | SSE 12 | SSE 11 | SSE 11 | NW 3 | SSE 10 |
| kJ | 4 | 1 | 4 | — | 347 | — | — | — | 211 | 363 | — | — | 70 | 60 | 56 | 206 | 140 | 69 | 38 | 2 | 19 |
Swell 3 Height (m) Direction Period (s) | — | — | E 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 10 | — |
| kJ | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 21 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | SE 4 | — | — | — | ESE 4 | E 5 | E 6 | E 6 | E 6 | — | E 7 | — | E 7 | ESE 7 | — | NNW 3 | WNW 3 | — |
| kJ | — | — | — | 16 | — | — | — | 28 | 49 | 49 | 39 | 69 | — | 110 | — | 236 | 111 | — | 2 | 3 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 17 | 95 | 28 | 28 | 28 | 28 | 28 | 28 | 9 | 0 | 9 | 0 | 0 | 152 | 0 | 0 | 28 | 0 | 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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