Formentera weather by season: what to expect and when to go

Formentera is famous for its beaches and crystal-clear water. Its Mediterranean climate, with mild winters and dry, sunny summers, is one of its great attractions. In this article we explain what the weather is like on the island in each season, so you can choose the best time for your trip.

The temperature and rainfall figures are AEMET (Spain’s state meteorological agency) averages for 1981-2010 from the weather station at Ibiza airport, on the neighbouring island; the sea temperatures are approximate averages for the waters around Ibiza and Formentera. They are a rough guide for Formentera.

Formentera’s climate season by season

Spring (March – May)

In spring, temperatures rise gradually: average highs go from around 18 °C in March to almost 23 °C in May, and lows from 10 °C to 15 °C. There is little rain (about 30 mm a month) and the days get longer. It is an excellent time for walking, cycling and exploring the island without the summer heat or crowds. The sea is still cool: around 15 °C in March and 16 °C in April, reaching about 19 °C in May.

Summer (June – August)

This is the most popular season. Average highs are between 27 °C and 30 °C and lows between 18 °C and 22 °C. It hardly rains (July is the driest month, with about 5 mm) and there are around 300 hours of sunshine a month or more. The sea is at its warmest in August, at about 27 °C. It is the perfect time for the beach, snorkelling and water sports. As demand is high, it is wise to book your accommodation and activities such as boat hire in Formentera well in advance.

Autumn (September – November)

Autumn starts out almost like summer: in September highs are around 28 °C and the sea is still about 26 °C. Temperatures then drop gradually to highs of around 20 °C in November. It is the wettest time of year: between September and November there are 50-60 mm of rain a month, although it falls on just a few days. The sea stays mild well into autumn (an average of about 23 °C in October), and there are fewer people than in summer.

Winter (December – February)

Winter is mild: average highs are around 16 °C and lows 8-9 °C. It rains slightly less than in autumn and there are calm, sunny days that are perfect for a stroll. Bear in mind that bad weather can sometimes disrupt the ferries to and from Ibiza, especially in winter.

What to do in Formentera depending on the weather

Beach, snorkelling and water sports

For swimming in warm water, the best months are June to October, when the sea is above 22 °C. September is a particularly good month: the water is as warm as in summer and there are fewer people. Hiring a boat is ideal in these months for reaching coves that are hard to get to by land.

Walking and cycling

Spring and autumn are ideal for exploring Formentera’s green routes on foot or by bike: pleasant temperatures, fewer people and the landscape at its best. In summer, set off first thing or late in the afternoon.

Tips for planning your trip to Formentera

What to pack for each season

• Spring: light clothes, a jacket for cool evenings, comfortable walking shoes and sun cream.
• Summer: swimwear, light clothes, a cap or hat, sunglasses, sun cream and a reusable water bottle.
• Autumn: light clothes, a jacket for the evenings, a raincoat and sun cream.
• Winter: light warm layers, a waterproof and comfortable shoes.

When is the best time to visit Formentera?

It depends on what you are looking for:

• Summer: to make the most of the beach and the sea.
• September: the water is still warm and there are fewer people; for many, the best month.
• Spring and autumn: for walking, cycling and enjoying pleasant weather with fewer tourists.
• Winter: for a quiet break, away from the hustle and bustle.