Best months to visit
MayJuneJulyAugustSeptember
May, June and September are the sweet spot: warm sea, comfortable air, and Formentera is far less crowded than even Ibiza. The island is genuinely overrun only in August.
Best for
Beach
June to October — sea 22-26 °C, warmest in August. The famous Ses Illetes and Migjorn beaches are comfortable into mid-October.
Hiking
April to mid-June and October to early November — flat terrain plus mild 18-23 °C make for easy walking; cycling is also excellent.
Sightseeing
May to June and September — May is genuinely empty, September retains warmth without the August intensity.
Climate notes
- Hot dry summer (June-September): 5-25 mm rain per month, highs of 27-30 °C, near-constant sunshine.
- Lowest rainfall in the Balearics: about 390 mm a year — the flat, low-elevation island has no orographic rainfall to add to passing storms.
- Strong winds year-round: the flat exposed terrain catches both the tramontana (north) and lebeche (southwest), making Formentera notably breezy.
- Long swimming season: shallow surrounding waters keep sea temperature above 20 °C from June through October.
- Mild winter: average 13-15 °C in January-February — among the mildest winter climates of any inhabited European island.
- Sea breeze every afternoon in summer: keeps coastal heat 2-3 °C below inland Ibiza.
Temperature (min / max °C)
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Rainy days per month
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Sunshine hours per month
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Regional notes
- Climate is essentially uniform across this small flat island — there are no significant regional differences.
- La Mola plateau (200 m) is 1-2 °C cooler than the coast and slightly windier.
- South-coast Migjorn beach catches more wind on tramontana days; north-coast Ses Illetes is sheltered.
Frequently asked questions
When is the best time to visit Formentera?
May, June and September offer warm sea (21-26 °C), comfortable air (23-28 °C) and far fewer crowds than the August peak when the island can feel saturated.
Is Formentera windy?
Yes. The flat low-elevation terrain offers no shelter from either the tramontana (north) or lebeche (southwest). Most beach days the wind is pleasant; on tramontana days the north coast can be quite breezy.
How hot does Formentera get in August?
Daytime highs average 29-31 °C, occasionally reaching 33 °C. Nights stay warm at 22-23 °C, but the sea breeze keeps daytime humidity tolerable.
Can you swim in Formentera in October?
Yes — sea temperature in October averages 22-23 °C, comparable to early June. Most beach services close in mid-October.
Does it rain much in Formentera?
Very little. Annual rainfall is about 390 mm, lower than Ibiza. July averages just 1-2 rainy days for the whole month. Most rain falls October-November in short intense storms.
Is May too cold to swim in Formentera?
Sea in May averages 18-19 °C — refreshing rather than warm. Sun-warmed shallow lagoons can feel several degrees warmer.
What is the weather like in Formentera in winter?
Mild but breezy. January-February averages 13-15 °C daytime, 8-10 °C nights, with about 50 mm of rain a month. Some restaurants close November-April but enough stay open for off-season visits.
When does the ferry from Ibiza stop running?
Weather-related: rough sea on tramontana days (mostly winter) can suspend ferries for half a day or more. From late October to April, services run on a reduced schedule.
Climate data: Open-Meteo · 2020–2025