Like much of the Caribbean, the Turks & Caicos have become a year-round destination. December to April is the high season, and temperatures range from the mid-70s to the mid-80sF. June to November (especially August and October) is much hotter with temperatures ranging from the 80s to over 100F. Hurricane season is June to October, but there's no cause for panic: satellite forecasts give enough warning that precautions can be taken.
NB, please do not rely solely on this information for your travel planning.
TURKS & CAICOS: BY AIR
From the UK: try British Airways.
From the USA: carriers include American Airlines,Delta and US Airways.
From the Airport:
Providenciales Airport (PLS) is about an hour's speedboat ride from Parrot Cay. Most hotels will meet you at the airport.