Fiji enjoys a mild and stable climate most of the year, due to the large expanses of open water that surround its islands. The prevailing winds are easterly and southeasterly; the mountainous spines of the larger islands produce clouds and greater rainfall on their windward sides. The wet season extends from November to April, but rain falls throughout the year. Daytime temperatures average around 25°C (77°F), and humidity is generally high. Tropical cyclones can blow up between November and April, although they are rarely dangerous.