Beirut (Lebanon) weather in December

Forum posters describe Lebanon's coast in December as bringing warm-ish days and cool evenings, typically 10-20C, with the last two weeks of the month turning genuinely cold and rainy - posters note the interior mountains can drop to around 5C, distinctly colder than the coastal towns like Byblos, Saida and Sour where winter stays comparatively mild. Posters are consistent that rain is the main weather challenge along the coast this time of year, sometimes falling even when temperatures still sit around 20C. Posters generally rate December as a rewarding time to explore Byblos and Lebanon's other historic coastal sites despite the rain risk, describing conditions overall as not too cold and not too hot. Posters generally rate December as mild by day, cool and often wet by night for Byblos, workable for sightseeing with rain gear on hand.

Forum posters cite average November highs in Beirut around 23-24C with lows in the mid-to-upper teens C, and nights that can feel cool thanks to the sea. Posters describe rain as genuinely variable through the month - often sunny with only a modest chance of light rain earlier on, but posters note that by mid-November rain becomes more frequent even as warm weather generally persists into December, with the tail end of the month typically mixing sunny and rainy days around 20C. Posters consistently recommend autumn layers - jeans, t-shirts, a light jacket and a sweater or two for cooler evenings. Posters are direct that November isn't the best month for beach time given the real chance of rain, wind and cooler temperatures. Posters generally rate November as mild and pleasant overall for a Beirut visit, with increasing odds of rain as the month progresses.

Forum posters consistently describe October temperatures in Beirut as neither hot nor cold, typically 20-25C on the coast and a cooler 15-20C in the mountains above 1,000m - a genuinely pleasant window for touring both the city and nearby highlands. Posters cite an old Lebanese saying that there's another summer between October and November, with September widely rated as reliably great and early November as the safer bet if guaranteed cooler weather matters more. Posters note that most private beaches south of Beirut close by mid-October, though some individual spots stay open into the shoulder season as long as conditions allow swimming. Posters generally recommend packing light for the city itself, with just a thin shawl for evenings, plus a summer jacket if venturing up into the mountains.

Beirut forum regulars call spring, April-May, one of the most pleasant stretches of the year — “near perfect weather,” “sunny days but nice and cool evenings,” with coastal readings in the high teens to high 20s°C. Beaches open for the season in early May, and posters point to it as the sweet spot for combining beach time with sightseeing at archaeological sites and in the mountains before summer's heat and crowds arrive. Rain has essentially wound down by this point in spring. Our record: 26.9°C days, 16.7°C nights, only 2.6 rain days and a 21.9°C sea — warm, dry and swimmable, matching the “near perfect” read almost exactly.

April is the forum's favourite season in Lebanon, and the reason is the mountains rather than the coast: it is the month for the archaeological sites — Baalbek, Byblos, the Jeita Grotto — with coastal temperatures around 22°C and rain on only a handful of days, while the mountains run nearer 10 to 15°C. The catch worth knowing before booking a beach hotel: Lebanon's public and private beaches are closed in April and do not open until June, running through to mid-October. Hotel pools stay open year-round. Expect a real spread between coast and altitude on the same day.