July in Spain? You’ve basically hit the jackpot for swimming conditions. This is when the Mediterranean really shows off – warm, calm water that’s perfect for spending entire days in the sea without turning into a prune or getting cold. Whether you’re planning a family beach holiday, a couples’ getaway, or just want to float around in crystal-clear water, Spain in July delivers.
The thing is, Spain’s got like 8,000 kilometers of coastline, and not all waters are created equal. Some spots are bathtub-warm while others (looking at you, northern Atlantic coast) still require a bit of mental preparation before diving in. Let me break down exactly where you should head for the warmest, most swimmable waters this July.
Sea Temperatures Across Spain in July
Here’s the quick overview: July sea temperatures in Spain range from a chilly 67°F (19°C) on the northern Atlantic coast to a toasty 78°F (26°C) in places like Alicante and the Mar Menor lagoon.
The Mediterranean coast (from Catalonia down through Valencia, Murcia, and Andalusia) heats up to a lovely 75-78°F (24-26°C). The Balearic Islands hit similar temps around 77-78°F (25-26°C). The Canary Islands stay slightly cooler at 72-74°F (22-23°C) but offer year-round swimming. And the northern Atlantic coast (Galicia, Asturias, Cantabria, Basque Country) tops out around 67-69°F (19-21°C).
Why the difference? The Mediterranean is an enclosed sea that bakes all summer under intense Spanish sun, while the Atlantic gets cold currents from the north. Simple geography, big difference in swimming comfort.
Warmest Places to Swim in Spain in July
Costa del Sol (Andalusia)
The “Sun Coast” lives up to its name with sea temperatures hitting 73-75°F (23-24°C) in July. Beaches like Málaga, Marbella, and Nerja offer calm Mediterranean waters with long stretches of golden sand. Air temperatures reach 86-91°F (30-34°C), so the water actually feels refreshing rather than lukewarm.
What’s great about Costa del Sol is the combination of warm water, developed infrastructure, and those classic Spanish beach vibes. The swimming season here runs from June through October.
Costa Blanca (Alicante & Valencia)
This is where things get seriously warm. Alicante and Benidorm hit average sea temps of 78°F (26°C) in July, with some spots reaching up to 81°F (27°C). Valencia comes in at 77°F (25°C).
Costa Blanca heats up quickly because of shallow urban beaches and intense sunshine. Popular spots like Calpe and Arenales del Sol are super family-friendly with gentle slopes into the water and excellent facilities. The swimming season here extends from June to October, with water never dropping below 68°F (20°C) during those months.
Balearic Islands
The Balearics offer some of the clearest, warmest Mediterranean waters you’ll find. Ibiza averages 78°F (26°C) in July, sometimes hitting 82°F (28°C). Mallorca (Palma) sits around 77°F (25°C). Menorca is similar to 77°F (25°C).
Each island has its own character. Ibiza and Formentera are famous for turquoise waters and beach clubs. Mallorca offers everything from family beaches to hidden calas (coves). Menorca has pristine, less-developed beaches with incredibly clear water perfect for snorkeling. The south shore of Formentera consistently ranks among Spain’s warmest swimming spots.
Murcia & Costa Cálida
Here’s the secret weapon: Mar Menor. This massive saltwater lagoon is literally called the “Little Sea,” and it’s one of Spain’s warmest swimming spots. In July, the Mar Menor hits an average of 81°F (27°C), with temps ranging from 72-84°F (22-29°C).
Why so warm? It’s only 23 feet (7 meters) deep max, so it heats up like a giant natural pool. The water is shallow with gentle slopes – absolutely perfect for kids and relaxed swimming. The lagoon covers 52 square miles with 43 miles of coastline. It’s warmer than the adjacent Mediterranean by about 5-7°F.
The nearby Mediterranean coast around Cartagena also offers warm waters at 77°F (25°C).
Canary Islands
The Canaries are actually slightly cooler than the Mediterranean in July, which sounds counterintuitive but makes sense when you realize they’re out in the Atlantic. Sea temps range from 72-74°F (22-24°C).
The advantage? Year-round swimming. While Mediterranean beaches cool down significantly in winter, the Canaries maintain swimmable temps all year. Gran Canaria (Playa de las Canteras), Fuerteventura, and Tenerife all offer excellent beach infrastructure, volcanic black sand beaches, and natural ocean pools formed in volcanic rock.
Best Beaches for Swimming in July
For Warmest Water
- Mar Menor lagoon (Murcia) – 81°F average, shallow and calm
- Alicante beaches – 78°F, gentle waters
- Ibiza – 78°F with crystal-clear visibility
- South Formentera – consistently warmest open-water option
For Families
Spain has 642 Blue Flag beaches in 2025, meaning they meet high standards for water quality, safety, facilities, and environmental management. Family favorites include:
- Playa de Muro (Mallorca) – shallow, calm, Blue Flag certified
- Son Bou (Menorca) – gentle waters, lifeguards, facilities
- Ortigues-Campo (Alicante) – praised for calm waters and a family-friendly setup
- Playa del Inglés (Gran Canaria) – tons of activities, backed by dramatic dunes
- Mar Menor beaches – incredibly shallow, warm, perfect for small kids
Blue Flag beaches always have lifeguards during peak season, clean facilities, and accessibility features. Look for the blue flag symbol at beach entrances.
For Clear Water & Snorkeling
- Cala Mondragó (Mallorca) – protected natural area, Blue Flag beach
- Menorca’s calas – rocky coves with exceptional visibility
- Costa Brava coves (Begur area) – dramatic cliffs and clear waters
- Protected marine areas throughout the Balearics
Rocky coves typically have clearer water than sandy beaches because there’s less sediment stirred up. They’re ideal for snorkeling and seeing fish.
Beaches to Approach Carefully
Northern Spain (Atlantic Coast)
The water up north is significantly cooler. Gijón and Avilés (Asturias) only reach 67°F (19°C) in July. Santander (Cantabria) hits 69°F (21°C). Bilbao and the Basque coast get to 69°F (21°C).
This is “cool swimming” at best, according to temperature guides. You’ll see locals swimming happily, but if you’re used to warm Mediterranean water, it’ll feel cold. The upside? Dramatic scenery, fewer crowds, and excellent surfing conditions. Just manage your expectations on water temperature.
Galicia
Similar story – cooler Atlantic waters, though sheltered rías (inlets) can heat up faster than the open coast. Beautiful beaches, but not the warmest choice for July swimming.
Windy or Surf Beaches
Some beaches get strong onshore winds or consistent surf that makes them better for surfing than leisurely swimming. Check local conditions and flag systems before diving in.
Swimming Tips for Spain in July
Best time to swim: Early morning (7-10 AM) or late afternoon (5-7 PM) gives you fewer crowds and slightly cooler air temperatures. Midday water is warmest, but beaches are packed, and the sun is brutal.
Dealing with crowds: July is peak season. Hit popular beaches early to claim a spot. Consider renting a beach chair/umbrella in advance at resort areas. Alternatively, seek out less-famous beaches and calas away from major resorts.
Sun protection is non-negotiable: Spanish summer sun is intense. SPF 50+ minimum, reapply every 2 hours and after swimming. UV shirts help. Wide-brimmed hats. Sunglasses. I’m not kidding – you will burn faster than you think.
Jellyfish awareness: Some years bring jellyfish blooms, especially in the Mediterranean. Spanish beaches use a flag system:
- Green flag: Safe swimming
- Yellow flag: Caution (rough conditions, possible jellyfish)
- Red flag: No swimming allowed
- Purple flag: Dangerous marine life present (jellyfish)
Always check the flag before entering. If you get stung, notify lifeguards immediately.
Beach safety: Swim only at beaches with lifeguards during supervised hours. Respect flag warnings. Watch for currents. Keep kids in sight at all times. The Mediterranean is generally calmer than the Atlantic, but conditions vary.
What to Pack for Spanish Beach Swimming
Reef shoes: Rocky Mediterranean beaches and volcanic Canary Island shores can be rough on bare feet. Cheap water shoes make life way easier.
Snorkeling gear: If you’re hitting clear-water coves, bring your own mask and snorkel. Rental quality varies, and having your own is more hygienic.
UV shirts and sun hats: Long-sleeve rash guards protect your shoulders and back during extended swimming. Hats with chin straps won’t blow away on breezy beaches.
Waterproof phone case: For photos and keeping valuables dry. Just be mindful of beach theft – never leave valuables unattended.
Reusable water bottle: Staying hydrated is crucial. Many Spanish beaches have water fountains for refills.
FAQs
Is the sea warm enough to swim in Spain in July?
Absolutely. Mediterranean and southern coastal waters range from 73-78°F (23-26°C) – warm enough for extended swimming without wetsuits. The Mar Menor hits 81°F (27°C). Even the cooler northern Atlantic coast reaches 67-69°F (19-21°C), which many people find swimmable.
Where is the warmest sea in Spain in summer?
The Mar Menor lagoon in Murcia consistently ranks warmest, averaging 81°F (27°C) in July and peaking near 84°F (29°C). For the open ocean, Alicante and Ibiza both hit 78°F (26°C). The south shore of Formentera is also among the warmest.
Can you swim comfortably in Spain without a wetsuit?
100% yes on the Mediterranean coast, Balearics, southern Andalusia, and Canaries in July. Water is warm enough for hours of swimming in just a bathing suit. The Northern Atlantic coast is cooler but still swimmable for many people without wetsuits – just not as luxuriously warm.
Are Spanish beaches safe for swimming?
Generally very safe, especially at Blue Flag beaches with lifeguards and facilities. The Mediterranean has minimal tides and currents compared to oceans. Always swim at supervised beaches, respect flag warnings, and watch for occasional jellyfish. Beach safety infrastructure is excellent in tourist areas.
Which Spanish coast is best for families in July?
Costa Blanca (Alicante area) and Mar Menor offer the warmest, calmest water with excellent family facilities. Mallorca’s Playa de Muro and Menorca’s Son Bou are Blue Flag family favorites with gentle slopes and amenities. Costa del Sol also works well with established resort infrastructure.
Make Your Spanish Swimming Dreams Happen
If you want the absolute warmest water, head to the Mar Menor lagoon or Alicante’s Costa Blanca – you’re looking at bath-like 78-81°F (26-27°C) temps. For the best overall package of warm water, clear visibility, and beautiful surroundings, the Balearic Islands (especially Ibiza, Formentera, and Menorca) are hard to beat. Families should prioritize Blue Flag beaches with calm waters and facilities.
Book accommodation early – July is peak season, and prices reflect it. Consider visiting early July rather than late July/early August when Spanish domestic holidays kick in, and crowds maximize. Pack seriously good sun protection, arrive at beaches early, and prepare for some of the best swimming conditions Europe offers.
The Mediterranean in July is genuinely special – warm enough to stay in for hours, calm enough for relaxed floating, and clear enough to see your toes. Just pick your coast, respect the sun, and enjoy the fact that you’re swimming in some of Europe’s warmest, most beautiful waters. Spain’s waiting for you.
