Sea Temperature in Dugi Otok Island in May (2026) – Swimming Guide
Sea temperature in Dugi Otok Island in May averages 19.2°C (typical range 16.9°C–21.7°C). Swimming conditions, 10-day trends, and top beaches.
Typical Range: 16.9°C – 21.7°C
Standard swimwear is fine for quick dips. For toddlers and sensitive swimmers, a thin 2mm shorty wetsuit is recommended.
Povoljni termički uvjeti za cjelodnevni boravak uz more
6 rainy days · UV Index 7
Sea Temperature Progression in May by Decade
Multi-year oceanographic measurements across early, mid, and late month:
Annual Oceanographic Climatology for Dugi Otok Island
Multi-year historical records by the Croatian Meteorological and Hydrological Service (DHMZ) & Institute of Oceanography and Fisheries (IZOR)
| Month | Sea Temperature | Day Air | Night Air | Sun Hours | Rain Days | Swimming Verdict |
|---|---|---|---|---|---|---|
| January | 13°C (11.4° – 14.4°) | 11.6°C | 5.3°C | 4.6 h | 7 d | Crisp & cool |
| February | 12.3°C (10.7° – 13.7°) | 12.3°C | 5.7°C | 5.5 h | 6 d | Crisp & cool |
| March | 13.4°C (11.8° – 15.1°) | 15.2°C | 8.1°C | 6.8 h | 6 d | Crisp & cool |
| April | 15.7°C (14° – 18°) | 18.9°C | 11.3°C | 8.2 h | 7 d | Crisp & cool |
| May → | 19.2°C (16.9° – 21.7°) | 23.7°C | 15.6°C | 9.6 h | 6 d | Refreshing & invigorating |
| June → | 23.3°C (20.5° – 25.9°) | 27.9°C | 19.5°C | 11 h | 5 d | Comfortable & warm |
| July → | 25.7°C (23.7° – 28°) | 30.7°C | 22.1°C | 12.1 h | 3 d | Very warm & ideal |
| August → | 26.6°C (24.7° – 29°) | 30.5°C | 21.9°C | 11.4 h | 3 d | Very warm & ideal |
| September → | 24.2°C (21.9° – 26.3°) | 25.7°C | 17.9°C | 9 h | 5 d | Comfortable & warm |
| October → | 20.7°C (18.5° – 23°) | 20.7°C | 13.9°C | 6.8 h | 7 d | Refreshing & invigorating |
| November | 17.1°C (15.1° – 18.9°) | 15.9°C | 9.6°C | 4.9 h | 8 d | Crisp & cool |
| December | 14.4°C (12.7° – 15.9°) | 12.3°C | 6.2°C | 4.1 h | 8 d | Crisp & cool |
Top Rated Beaches in Dugi Otok Island for this Season
Curated bathing spots featuring verified water cleanliness and supreme swimming comfort (4 verified locations):
Expert Swimming & Marine Tips
🌬️ Winds & Marine Currents
Summer afternoons regularly welcome the refreshing Maestral (NW) sea breeze. A strong Bura (NE) wind can temporarily drop surface water temperatures by 1–2°C, especially in shallow coastal coves.
☀️ Sun Protection & UV Exposure
In peak summer months, the UV index regularly surpasses 8. Limit unprotected sunbathing between 11:00 AM and 4:00 PM, and always use high-factor water-resistant sunscreen.
🤿 Water Clarity & Sea Urchins
The Adriatic Sea here consistently scores excellent water quality under EU bathing water directives. Sea urchins on rocky shallows serve as nature’s bio-indicator of immaculate water purity.
Frequently Asked Questions – Sea Temperature in Dugi Otok Island
Is it warm enough to swim in Dugi Otok Island in May?
In May, average sea temperature in Dugi Otok Island is 19.2°C. Refreshing & invigorating / Best for active swimming. Standard swimwear is fine for quick dips. For toddlers and sensitive swimmers, a thin 2mm shorty wetsuit is recommended.
What is the air temperature and daily sunshine in May?
Average daytime air temperature reaches 23.7°C (15.6°C at night), featuring approximately 9.6 hours of bright sunshine daily and only 6 rainy days.
How does sea temperature evolve from early to late May?
During early May (1st–10th) water averages 18.4°C, mid-month (11th–20th) sits at 19.2°C, and late month (21st–31st) reaches 20°C.