Reading a thermal: Ora, Peler, Breva

A thermal lake wind is a timetable. On Lake Garda the north wind owns the morning and the south wind owns the afternoon. On Lake Como the same handover happens under different names. Four winds, two lakes, one changeover around the middle of the day, and if you get the hour wrong you arrive at a mirror.

The Peler, and why it is a dawn wind

The Peler, spelled Pelèr and called Vento at Torbole, comes down Garda from the north. At Torbole it runs from roughly 02:00 or 03:00 until around midday.

Off Malcesine it builds overnight, holds through sunrise and normally fades between 10:30 and 11:00, which is why the lift boats leave at about 07:30 for it. Campione gets it on the beach around 07:00, and it strengthens once the sun is up.

It is the harder of the two Garda winds and the gustier. Malcesine puts it at around 20 knots, 16-25 on a normal morning and 25-35 on a strong summer forecast. Campione has it commonly at 15-22 knots and up to about 30 on stronger ordinary days, with the Balì as a separate, stronger northerly disturbance.

Pra de la Fam, on the Brescia shore under the old limonaia, is the Peler specialist: 25-30 knots is what riders report on session days. It also switches on later than Malcesine, because the wind wants the sun well up before it comes in over the pebbles.

Without enough sun it can sit out in the middle of the lake and never reach the beach at all, which is why a clear sky matters more here than on most of that shore. A sunny January or February can produce exceptional sessions there.

The Ora, and how far north it gets

The Ora fills from the south as the Peler dies. At Malcesine that is most often between 11:00 and 13:00, and it then runs until sunset; the afternoon boats go at about 13:30. At Campione it either follows the Peler straight on or rises from about 12:30 to 14:00, commonly 10-18 knots with a peak between 14:00 and 15:00.

Strength climbs as you go north. The Ora is roughly 15 knots off Malcesine, 12-18 knots as a working range, and stronger again toward Navene and Torbole.

The Navene club launch is an Ora spot only: it operates exclusively on the south wind, at 14-18 knots, with area managers on the beach from 11:00 to 18:00. At Limone the rhythm is two thermal sessions a day, the north wind stronger in the morning and the Ora softer after it.

The name travels beyond Garda. At Ponte Caffaro, at the north end of Lago d'Idro, the afternoon wind is also the Ora: it comes in onshore to the kite area from the first afternoon hours, around 12:00 to 13:00, and averages about 15 knots, with 10-15 knots the normal day.

Como runs the same clock with different names

On Como the afternoon wind is the Breva, out of the south, and the morning wind is the Tivano, out of the north and northeast.

The Breva starts at the southern end of the lake around midday and works its way north, so where you stand decides when you rig. Dervio is where it first fills on the upper lake, roughly 13:00 to 18:00. Dongo blows 12:00 to 19:00 in season.

Domaso gets it between 11:30 and 13:30, earlier in spring and nearer 13:00 in high summer. Gera Lario, at the very top, waits until about 13:00 and peaks between 15:00 and 16:00, then swings side-offshore and goes gappy. Across the day it rotates about 40 degrees.

A normal Breva is 15-18 knots on the upper lake, over 20 when easterly flow reinforces it, and in rare cases close to 30. Weak thermal days at Domaso sit at 10-12 knots. That is foil and big-kite territory.

Dervio sees 20-25 knot peaks when the thermal is strong, because the lake narrows there and at Cremia and squeezes the wind. A thin day at Colico can still be a session further down.

The Tivano is the other half of the clock. It builds a few hours after sunset and dies around 10:30 or 11:00. Valmadrera is a morning spot and nothing else: the Tivano there is commonly 05:00 to 09:00 at 15-18 knots, which is why the grass by the harbour fills up in the dark. The same wind reaching Dervio is much weaker, with a local reinforcement of only 3-4 knots at the promontory.

Then there is the category that is not a thermal at all. The northerly Ventone, the Foehn and the ricaduta run on weather rather than on a schedule. They come out of the Valchiavenna at up to 40 knots, arrive at any hour, and can hold for one to three days. That is when the schools stop teaching.

What a wind model gets right here, and what it does not

Our own high-resolution model, built from hourly 2023 and 2024 archive data over riding hours, reads the shape of these winds well. At Navene the dominant direction is south-southwest in eleven months out of twelve, and the daily peak falls between 14:00 and 16:00 in nine of them.

That is the Ora, exactly where it should be. Dervio comes out south in nine months out of twelve with a 16:00 peak in six of them, then flips north from November through January, which is the Tivano and the post-frontal northerlies taking the winter.

Strength is the part it misses. The same model gives Malcesine a best month of 9.4 knots of average daily maximum, against the 12-18 knots the Ora is credited with on the water. Large-scale models understate the thermal on both lakes, or miss it.

Colico has no measured series to fall back on either: the weather station once listed for that beach averaged about 1 knot across 2012 to 2017 and then stopped transmitting, so any published average for it rests on nothing.

One series does survive the test. Dervio carries three consecutive hours over 12 knots on 50% of June days, the highest windy-day share on either lake, and 40% in July and 37% in August.

The season, and the paperwork around it

April to October is the working stretch on both lakes: it is the Breva's season on Como, the practical season at Campione, and the range Garda's schools quote. Torbole splits the year formally, with seasonal kite windows from 1 March to 9 October and daylight access to the whole Garda Trentino lake area from 10 October to 28 February.

At Navene, high season is June to September, with April and May ahead of it and October behind, and the area managers work roughly March or April to the end of October. Winter on Lago d'Idro has no wind at all.