Partly sunny on Tuesday with isolated showers and thunderstorms all across the island in the afternoon.
The Met Office has issued a yellow warning for heavy storms between 11 in the morning and seven in the evening.
Winds will be moderate, 3 to 4 Beaufort, over slight to moderate sea waters.
The temperature will rise to 30 C inland, 27 C to 29 C in coastal areas and 20 C in the mountains.