Wind up to 64 km/h in Foz: why it's so windy — and when it will stop

What is this wind

Since Thursday (16), the wind in Foz has been blowing steadily from the north‑northeast (NNE) — the classic pattern that precedes the arrival of a cold front. Warm air from the continent’s interior is funneled southward in a low‑pressure corridor; the closer the front, the stronger the corridor. It is not a storm: it is the announcement of one.

What the numbers show

Marco Três compared this week’s gusts with all July days from 2015 to 2025 (Open‑Meteo archive for Foz coordinates):

The average gust for a July day in Foz is 32 km/h. The windiest July day in ten years had recorded 69.5 km/h — the last two days came close.

When it stops

According to the model forecast (Open‑Meteo, updated this Friday):

• Saturday (19): peak — gusts up to 64 km/h, still from the north;
• Sunday (20) and Monday (21): weaken to 53–54 km/h;
• Tuesday (22): the front passes, the wind turns southwest and the gust drops to 34 km/h;
• Wednesday (23): 24 km/h — within the month’s normal range.

How it affects outings

Gusts above 60 km/h knock down beach umbrellas, sway walkways and disrupt viewpoint photos — but they do not close attractions by themselves. Nautical tours (Macuco, Kattamaram, river boat) are the most wind‑sensitive: the decision to operate is left to each operator on the day. On windy days, the morning is usually calmer than the afternoon; the late‑afternoon at Marco das Três Fronteiras remains open, with the river more choppy than usual.