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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the The UK Daily weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
If you are planning a trip this month, expect pleasantly warm days along the coast and cooler evenings inland. May marks the start of Bulgaria’s tourist season, with daytime highs reaching 20–25°C along the Black Sea, though the sea remains too cold for comfortable swimming until June.
What is the weather like across Bulgaria in May?
May is a transitional month, with temperatures rising steadily as the month progresses. In coastal resorts such as Sunny Beach, Nessebar and Obzor, expect daily highs around 22–25°C, with overnight lows of 12–15°C. Inland, including the capital Sofia, temperatures are a touch warmer during the day but can drop to 8–10°C at night. Rainfall is moderate, averaging 6–8 wet days, with short afternoon showers more common in the mountains. For a broader look at conditions at home, check our UK weather hub.
Is it warm enough for a beach holiday in May?
Sunbathing is perfectly comfortable on most days, but the Black Sea water temperature sits at only 16–18°C in May — too chilly for most swimmers. If you are heading to Nessebar or Obzor, pack light layers for the day and a jacket for the evening. For those considering a slightly later trip, our coverage of weather in Bulgaria in May June shows a noticeable jump in heat by the first week of June. Travellers often ask how Bulgaria weather May compares to weather in Bulgaria in April; the difference is roughly 5–7°C warmer in May, with longer daylight hours.
What is the weather like in Bulgaria at the end of May?
End of May is the warmest part of the month, with coastal highs reaching 25–27°C. Evening temperatures stay above 14°C, making it ideal for evening strolls. The chance of rain drops slightly compared to early May.
Can I swim in Sunny Beach in May?
Not comfortably. The sea off Bulgaria weather May Sunny Beach averages 17°C, which is bracing even for hardy swimmers. Most resort pools open from mid-May, so you can swim heated if needed.
How does Obzor weather compare to Nessebar in May?
Temperatures are nearly identical — within 1°C of each other. Obzor sees slightly more wind, while Nessebar has marginally higher humidity. Both are pleasant, but Obzor is better for windsurfing enthusiasts in May.