Meteo Philipsburg (Sint Maarten) in settembre

St. Martin's forum describes September as generally sunny day after day, hot and humid, with scattered 20-30 minute showers - often at night - rather than sustained rain. It's also the height of hurricane season (August through October are the most active months), so travel insurance gets recommended repeatedly. Marigot's French-side restaurant scene thins out noticeably in September as many close for the month, though posters said there's still enough open to eat well, just without the full peak-season variety - the trade-off being a genuinely quiet, uncrowded month for whatever stays open.

Regulars are specific this counts as prime season here, genuinely little rain compared to the late-summer and fall stretch when tropical storms bring the real wet weather, sun the dominant feature of a typical day. Our row backs that hot, genuinely dry read, 29C reading as a hot 30C, over 23.6C nights feeling 23C, with rain light at 36.5mm across 9.2 days and a real 31.8 kph wind. Regulars are consistent the wind runs noticeably stronger this month, choppier water a real result even on an otherwise sunny day, afternoons themselves turning genuinely hot. The sea sits at a warm, swimmable 25.9C. The record: 10.7 hours of sun, humidity 77 percent and AQI 40.

January here is low to mid eighties with brief showers, and regulars name the one variable that decides your week: the Christmas winds, the reinforced trades that blow through December and January and make some days genuinely blustery. Our column reads 30 kph as a monthly average, which is why the local advice is a map rather than a forecast - the west-facing beaches shelter and the east-facing ones take it. Rain looks frequent at 10.5 days but totals 28.6mm, under three millimetres a time, which is their ten-to-fifteen-minute shower and then sun. Air is 29.1C over 23.7C and the sea 26.4C, a degree under the 81F they quote. The record: humidity 77 percent, 10.4 hours of sun and AQI 38.

March in St Maarten runs around 27 to 29C, sits well outside hurricane season, and is peak season with early March the busiest of it. Regulars describe the rain as sporadic rather than seasonal - a dark cloud or a short sprinkle, lasting about as long as the cloud takes to pass - which is what our row's 8.7 precipitation days carrying only 22mm between them amount to. The other March variable is wind, 29.6 kph here, and it decides the beach: Orient Bay and the windward east side get the breeze and the surf, while the west-side beaches are the calmer, clearer option on a blowy day. In Philipsburg itself the crowd is a shipping question - how many cruise ships are in port that morning. The record: 23.9C nights, 11.1 hours of sun and a 26.2C sea.

Forum posters describe October as more comfortable than peak summer, with temperatures typically in the 80sF rather than the 90s and noticeably lower humidity, plus especially clear, vivid sunrises and sunsets. Posters are candid this still sits within hurricane season - the worst storm risk peaks in early September, but October isn't risk-free, even though the odds of a direct hit during any given week-long stay remain low. September through November is named by posters as the wettest overall stretch of the year, with October specifically cited as the single rainiest month - though actual experience varies widely, with one visitor reporting just about 10 minutes of rain across their entire October stay. Posters generally recommend late October as a solid, less-crowded window overall.