Mayreau lies west of the Tobago Cays. It is the smallest (1 1/2 square miles) of the inhabited Grenadine islands, with a population of two hundred and fifty-four people. Mayreau is accessible only by boat. The island is rimmed by magnificent sweeping white sandy beaches perfect for sailing and snorkelling. Hike along the trail from Salt Whistle Bay up to the quaint little village, with friendly bars, local restaurants, and a lovely Catholic church which offers a panoramic view of the Tobago Cays. From Saline Bay a road also leads to the village or across the southern part of the island to the salt pond where you can collect rock salt in the dry season, or continue on to explore the pristine beaches. The climate in the Southern Grenadines is hot and dry. Average daily maximum and minimum temperatures are 30 and 24 degrees Celsius (86 and 75 Fahrenheit) respectively. Rainfall is only 100 mm (4 inches) per year concentrated in the periods May - June and October - November.
Sea surface temperature varies between a low of 25 degrees Celsius (77 Fahrenheit) in February/March to a high of 28 degrees Celsius (82 Fahrenheit) in September/October. Because of their latitude the waters in the Southern Grenadines are occasionally influenced by the Orinoco river in Guyana during rainy season, which causes a drop in salinity, changes in water colour, and a decrease in underwater visibility. Although the climate is hot, the constant trade winds will have a pleasant cooling effect during the day. When you 're anchored in the lagoon overnight the breeze might actually urge you to look for a sweater. The famed Horseshoe Reef surrounds the four main deserted islets, dotted with the odd palm tree and vegetation. The sister island Petit Tabac lies outside the Horseshoe Reef. You can sail, snorkel and dive in luminescent waters filled with a kaleidoscope of coloured fish, or beach comb the brilliant coral sands - a rare tropical paradise that can be reached only by boat.