Weather in Mallorca in September: Warm Late Summer, Quieter Beaches and Perfect Sea Temperatures

Mallorca in September feels like a softer version of high summer, with warm days around the mid‑20s, comfortably warm evenings and a sea temperature that still sits in the mid‑20s. It is one of the best months if you want real beach weather, warm water and a noticeably calmer island than in July and August, and with the right hotel, car rental and activity deals from mallorcard.es you can build a high‑quality trip at friendlier prices.

Quick overview - Mallorca weather in September

September gently shifts Mallorca from peak summer towards early autumn, but it still feels very much like summer for most of the month.

A realistic “at a glance” for September in Mallorca:

Average daytime temperature: roughly 26–29°C
Average night temperature: about 18–21°C
Average sea temperature (Palma area): around 24–26°C, with recent averages around 25–26°C
Sunshine: about 8–10 hours per day
Rainfall: generally low, with roughly 30–50 mm over about 4–5 days and occasional showers or storms

In day‑to‑day terms, September brings warm, summery weather most days, with a small but real chance of the odd rainy or cloudier spell, especially later in the month.

Temperatures in September - what it really feels like

Mornings usually start pleasantly mild, often around 18-20°C. You can step out comfortably in light clothes, perhaps with a thin layer if you are out very early. It feels like late summer rather than autumn.

By late morning and afternoon, daytime highs typically reach 26-29°C, with some days touching or exceeding 30°C, especially in the first half of the month. In the sun and out of the wind, it still feels properly hot, but slightly less extreme than August, and humidity tends to be a bit more comfortable.

Evenings cool down to around 19-21°C, which makes eating outside and walking along the seafront very pleasant. You may not need a jacket at all, or at most a very light layer late at night or if you are in a breezy spot.

Humidity is moderate and usually lower than in August, which many travellers find more comfortable. The sun remains strong, so sunscreen and hats are still very important, but you may find it easier to stay outdoors for longer without feeling drained.

Coast, inland and Tramuntana

On the coast - Palma, Playa de Palma, Alcúdia Bay, Cala Millor - September brings warm air, warm water and long, comfortable evenings, but with slightly fewer people than in August. Seafront walks, cafés and restaurants feel lively but not as intense as peak season.

Inland towns and villages still heat up during the day, but nights are a touch cooler than at the height of summer. Visiting markets and villages works well in the morning or later afternoon; midday can still be hot, but the edge is softer than in July or August.

In the Tramuntana mountains, September is again attractive for hiking and scenic drives. It remains warm, especially on lower slopes, but is more comfortable for longer walks than in peak summer, particularly later in the month and with early starts.

Can you swim in Mallorca in September? (sea & pool weather)

September is an excellent month for swimming. The sea stays very warm thanks to the heat accumulated over the summer, with average sea temperatures around 24–26°C and recent measurements for Palma showing averages near 25.9°C and daily values mostly between about 24 and 28°C. This is comparable to a pleasantly warm swimming pool.

You can easily spend long periods in the water without feeling cold, whether you are swimming, snorkelling or playing in the shallows. For children, less confident swimmers and anyone sensitive to cooler water, September is one of the best‑feeling months of the year.

Hotel pools are also at very comfortable temperatures after the long summer. Many travellers simply alternate between beach and pool throughout the day, as conditions are perfect for both.

Because sea conditions remain so favourable, you can plan plenty of water‑based activities in September: swimming, snorkelling, paddleboarding and boat trips all work very well. For variety – and to hedge against the occasional shower or windy day – it makes sense to pre‑book a few alternative options such as caves, aquariums or guided city tours, ideally via mallorcard.es where you can pick up discounted boat tours, excursions and activities.

Weather by region - north, south, east, mountains

In the north (Alcúdia, Port de Pollença), September offers warm, relaxing beach days with water that still feels like summer, but with fewer crowds than in August. It is particularly appealing for families and couples wanting a quieter but still fully summery atmosphere.

The south, including Palma and Playa de Palma, remains lively, but the very peak‑season crush begins to ease. Palma is more comfortable for sightseeing than in July and August, especially if you focus on mornings and late afternoons, and the combination of city and beach works extremely well.

On the east coast (Cala Millor, Cala Ratjada, Cala d’Or), resorts are still busy and fully open, but you will notice a bit more space on the beaches and along promenades than in August. Water remains warm and clear, which is excellent for swimming and snorkelling in coves.

In the Tramuntana mountains, September is again a strong month for hiking, especially in the mornings and later in the day. Daytime heat is still there, particularly in the first half of the month, but long routes become more realistic again than in high summer.

Best things to do in Mallorca in September (weather‑friendly ideas)

September is perfect for combining classic summer activities with more active and cultural experiences, especially later in the month when the heat eases slightly.

Good September‑friendly ideas include:

Beach and bay days: full beach days with warm sea and slightly less crowding than peak summer.
Boat trips and catamaran cruises: sea still feels wonderful for swimming during stops, and decks are less packed than in August.
Swimming and snorkelling: great visibility and very comfortable water temperatures in many bays.
Hiking and cycling: especially from mid‑September onwards, the heat becomes more manageable for outdoor sports.
Palma and historic towns: city sightseeing is more comfortable, especially mornings and late afternoons.
Events and local festivals: early autumn often brings cultural events and fiestas, plus wine and food‑related activities.

Using mallorcard.es to plan September activities makes it easy to pick and book high‑value tours, excursions and experiences that fit both the weather and your budget. Many of these will come with discounts or promo codes, which is particularly attractive if you want to combine multiple paid experiences (boat trips, parks, guided tours) in a single trip.

Is September a good time to visit Mallorca? Pros & cons

Pros of visiting Mallorca in September

Warm, summery weather with daytime highs around the high‑20s.
Sea still very warm, often mid‑20s, so swimming is extremely comfortable.
Fewer crowds than in July and August, especially from mid‑September onwards.
Slightly lower humidity and slightly cooler nights than peak summer, making it more comfortable.
Better value and more availability compared with peak months, especially outside major event weeks.

Cons of visiting Mallorca in September

It can still be hot, particularly in the first half of the month; sensitive travellers need to manage heat and sun.
There is a slightly higher chance of showers or storms than in midsummer, though overall rain is still limited.
Certain family‑heavy weeks (e.g. early September school holidays) can still feel busy and keep prices elevated.

If you want guaranteed hot weather, very warm sea and a lively island but would prefer a bit more comfort and space than peak season, September is one of the best‑balanced months to choose. For cooler, more autumn‑like conditions, October will suit you better; for maximum heat and buzz, July or August remain the peak options.

How busy and how expensive is Mallorca in September?

September is a late high‑season / early shoulder‑season month. The first half of the month can still feel quite busy and priced like main season, while the second half usually sees a gradual easing of both crowds and prices.

Accommodation: Prices are generally high in early September, then start to trend downwards towards mid‑ and late month, though not yet at winter levels.
Car rental: Rates are lower than during the absolute peak of July–August but still significantly above winter; there is substantial variation between providers.

mallorcard.es can make a big difference here:

It highlights very competitive hotel deals, often with strong discounts compared with public rates, especially outside the most pressured weeks.

It offers promo codes for major car rental companies on Mallorca, which can realistically save roughly 10–50% on car hire depending on partner and date range.

It aggregates discounted tickets for tours, excursions and activities, helping you keep your average daily spend under control even when base prices are still seasonal.

By timing your trip towards mid‑ or late September and combining that with mallorcard.es deals, you can often get a “July‑quality” experience at a noticeably lower cost.

Mallorca weather in September for different types of travellers

Families with children

For families, especially those not tied to peak school‑holiday weeks, September is excellent. The sea is warm, the weather is summery and many attractions remain open, but there is a bit more breathing room than in August. Using mallorcard.es to book family‑friendly hotels, discounted attraction tickets and car rental with promo codes makes a big difference to the total budget.

Couples

Couples often love September for its combination of warm weather, romantic beaches and slightly calmer vibe. You can still enjoy full beach days, sunset dinners, Palma evenings and boat trips, but you will not feel quite as squeezed by peak crowds. mallorcard.es can help you find attractive hotel offers and special experiences – such as sunset cruises, tastings or event nights with discounts – so you can upgrade the feel of your holiday.

Hikers and cyclists

For hikers and cyclists, September (especially the second half) marks the return of more comfortable conditions. It is still warm, but less punishing than August, so longer routes in the Tramuntana or longer road rides become more realistic again. Many active travellers use mallorcard.es to add guided tours, transfers or recovery experiences (like spa deals or tastings) at reduced prices to their self‑planned routes.

Beach‑lovers and swimmers

For beach‑focused travellers, September is almost ideal: sea temperatures are among the warmest of the year, and the air is still hot enough for long beach sessions, but with more space and a slightly more relaxed tempo than in peak summer. If you love swimming, sunbathing and chilled beach bars without the absolute peak crush, September is one of the top choices.

Digital nomads and long‑stay guests

For digital nomads and long‑stays, September offers a great mix: near‑summer conditions, a busy but manageable island and (especially later in the month) more palatable prices. With mallorcard.es you can look for longer‑stay hotel deals, car rental promotions and regular activity discounts, which helps your monthly budget go further while you enjoy warm‑weather living.

What to pack for Mallorca in September

For September, you can mostly think in terms of late‑summer packing, with a light backup layer:

Shorts, light trousers, dresses and skirts
T‑shirts, tops and light shirts/blouses
1–2 very light layers (thin jumper or cardigan) for the odd cooler evening or air‑conditioned interiors
Sandals and flip‑flops, plus one pair of closed shoes for activities or travel
Several swimwear sets, a beach towel and a beach bag

Do not forget:

High‑SPF sunscreen
Sunglasses and a sun hat or cap
After‑sun or moisturiser
A reusable water bottle

If you pre‑book key September activities - boat trips, excursions, parks, city tours - via mallorcard.es, you will know exactly what you are doing and can fine‑tune your packing for a typical September mix of warm beach days, water activities, hikes and enjoyable evenings outside.