Black Sea water temperature — Serhiivka, Ukraine
A spa resort on the shore of the Shabolat Estuary, just off the Black Sea, Serhiivka is known for its therapeutic mud and mineral springs. Its sanatoriums and wide sandy beach make it a classic destination for restful family holidays.
The sea water temperature in Serhiivka, Ukraine is 16.3°C (measured Oct 22, 2026). That is 0.2°C colder than the 3-year average for this date (16.5°C).
Indicative estimate from waves and wind — always follow the lifeguard flags.
Zoom or select a range below to explore historical data.
Best month for swimming: August — average 24.6°C, with 100% of days at 22°C or warmer.
Based on daily readings from Jan 1, 2023 to Oct 22, 2026.
| Month | Average | Lowest | Highest | Days ≥ 22°C |
|---|---|---|---|---|
| January | 5.8°C | 1.8°C | 8.5°C | 0% |
| February | 4.1°C | 2.1°C | 6.8°C | 0% |
| March | 6.1°C | 2.5°C | 8.7°C | 0% |
| April | 10.4°C | 7.7°C | 14.4°C | 0% |
| May | 15.1°C | 10.6°C | 20.8°C | 0% |
| June | 20.7°C | 16.1°C | 24.4°C | 28% |
| July | 23.8°C | 20.4°C | 29.1°C | 92% |
| August | 24.6°C | 22.2°C | 26.7°C | 100% |
| September | 22.7°C | 19.0°C | 26.4°C | 72% |
| October | 17.9°C | 14.5°C | 22.2°C | 1% |
| November | 13.4°C | 9.0°C | 17.9°C | 0% |
| December | 8.0°C | 5.7°C | 11.9°C | 0% |
First and last day of each year with a daily mean water temperature of 20°C or more. Typically June 9 – October 9, about 130 days (median of 4 seasons). * Incomplete season in the data.
| Year | Season start | Season end | Days ≥ 20°C |
|---|---|---|---|
| 2026 | June 9 | September 28 | 105 |
| 2025 | June 19 | September 26 | 94 |
| 2024 | June 4 | October 12 | 130 |
| 2023 | May 30 | October 9 | 133 |
The sea water temperature in Serhiivka, Ukraine is 16.3°C (measured Oct 22, 2026). That is 0.2°C colder than the 3-year average for this date (16.5°C).
The warmest month is August, with an average water temperature of 24.6°C. The highest reading on record is 29.1°C (Jul 18, 2024).
The sea averages 20°C or more from June to September, which is the main swimming season. August is the warmest month at 24.6°C.
The coldest month is February, averaging 4.1°C. The lowest reading on record is 1.8°C (Jan 21, 2026).
The water typically stays at 20°C or above from June 9 to October 9 — about 130 days a year (median of 4 seasons).
Serhiivka, Ukraine has sandy beaches, mostly with a gentle entry into the water.
Because of upwelling. When a steady wind blows along the coast or away from it for a day or two, it pushes the warm surface layer out to sea and cold water from below rises to replace it. The water can cool by 5–8°C within a day, even in midsummer, and usually warms up again a few days after the wind changes. The beach conditions panel above shows when upwelling is under way or likely.
Sometimes. The most common is the moon jellyfish (Aurelia aurita), whose sting is very weak. In late summer the large barrel jellyfish (Rhizostoma pulmo) can appear; its sting causes mild, short-lived irritation. The transparent comb jellies don't sting at all. Numbers peak in warm water from July to September and vary a lot from year to year.
Practically none. The Black Sea is almost enclosed, so the tidal range is only a few centimetres. Changes in the water level at Serhiivka, Ukraine come from wind and waves, not tides.