Het weer in Florianópolis in januari

Regulars are specific this month opens the beach season proper after a windy fall, temperatures commonly cited in the low-to-mid 70s Fahrenheit, though predicting any single day stays genuinely hard given how quickly conditions can shift. Our row backs that warm, genuinely wet and windy read, 26.2C reading as a hot 29C, over 18.8C nights feeling 21C, with a substantial 148mm of rain across 16.7 days and a real 13.8 kph wind. Regulars are consistent the island's 40-plus beaches are a real practical advantage on a windy day, always another beach somewhere on the island sheltered enough to be comfortable. The sea sits at a warm, swimmable 23.7C. The record: 8.8 hours of sun, humidity 79 percent and AQI 42.

February is the better half of the Brazilian summer here: January is the national holiday month and busier, so mid-February runs calmer - except at Carnival, which moves with the calendar and brings traffic to the beaches, higher prices and the city's own street parties with it. Check where it falls in your year. Regulars are firm that this is the right season weather-wise and our row mostly agrees: 30.2C reading as 35C at 80 percent humidity, nights at 21.9C, a 26.7C sea. The part visitors worry about is real - 191.4mm across 19.5 days - but it arrives as a summer downpour rather than a wet season, with 9.9 hours of sun a day standing behind it. The record: an 11.5 kph wind and AQI 38.

Florianopolis-forum threads on July weather are consistent it's the wrong month for beach time - genuinely cold by local standards, cool enough that even committed surfers describe both the water and the air as chilly rather than inviting. Days do bring clear, sunny skies more often than not, since July is called one of the drier months of the year here, any rain that shows up typically brief rather than settling in. The one activity regulars specifically recommend for a July visit regardless of the cool temperatures: whale watching, with southern right whales reliably spotted in the bays off the island this time of year, boat tours running from Praia da Armação or the peninsula ferry crossing. Surf conditions stay strong too, good swells and offshore winds, just paired with water cold enough that a proper wetsuit is non-negotiable. The record: 21.9C days feeling like 22C, 13.1C nights, 56mm across 6.5 days, 82 percent humidity, an 18.6C sea and 7.6 hours of sun.

December on Floripa is hot and wetter than the brochure - our row carries 186.9mm across 19.6 precipitation days, which regulars confirm as quite a bit of rain inside an otherwise very nice month. The crowd advice is precise about dates rather than the month: Brazilians travel late, so the island only fills after Christmas and peaks at New Year, while early December is comparatively calm and January is packed throughout. Prices track the same curve. For space at any point, they send you south - Morro das Pedras for surf, Matadeiro for calm swimming. The record: 28.5C days that feel like 32C, 20.9C nights, humidity 80 percent, 9.8 hours of sun and a 25.7C sea.