Meteo Olbia (Costa Smeralda) in ottobre

Regulars describe this as almost certainly very warm but not hot, with the sea at its warmest point of the year and crowds already gone even though shops and restaurants stay open. Our row backs that mild, comfortable read, 24.5C reading as 25C over 13.2C nights, with 60.2mm of rain across 8.5 days - a chance of rain regulars call genuinely real, describing the month overall as unpredictable rather than reliably dry. Evenings do call for a jacket even on a day that felt warm by the water. The sea holds a comfortable 23C, still good for swimming or sunbathing according to regulars. The record: humidity 76 percent, 9.3 hours of sun, an 18.9 kph wind and AQI 41.

Sardinia's forum describes January as the island's coolest month but genuinely variable - some posters had lovely sunny days with cold, clear nights (no cloud cover to trap any warmth), while others visiting in the same general window hit cold, wet and windy stretches instead. A clear midday can reach a pleasant high-teens C before dropping off fast into the afternoon and evening, but freezing temperatures are unlikely on the coast around Olbia. It's not remotely beach weather, but a mild, walkable winter month when you catch the good days.

Forum posters describe July around Olbia and northern Sardinia as very pleasant for swimming, with daytime temperatures usually above 30C and sea temperatures around 24-25C, though posters flag a real risk of jellyfish this time of year. Posters consistently recommend packing a light wind or rain jacket and a light sweater for the evening despite the summer heat, since coastal evenings can turn noticeably cool. Posters also note Sardinia runs windier in summer than other seasons, a real factor for anyone planning beach days or boat trips. Posters generally rate July as calmer and less crowded than August, making it their preferred pick between the two peak summer months.