NOAA SATELLITE DATA (1991–2020 30-YEAR CLIMATOLOGY)

Romania Sea Temperature in September

Historical 30-year sea surface temperatures across 6 coastlines in Romania for September. Derived from NOAA 0.25° blended satellite and in-situ marine observations.

Climatology Notice: Temperatures represent the 30-year long-term historical average (1991–2020 normal), not a live single-day sensor forecast.

21.8°C

Refreshing / Invigoratingaverage across 6 surveyed coastlines in Romania, September

Ranges 21.4°C at Sfântu Gheorghe Beach to 22.0°C at Plaja 2 Mai.
All 6 surveyed coastlines are at or above the 21°C swim threshold.
On the national average, the water is above 21°C from 17 Jun to 21 Sep — about 96 days a year.
2.9°C cooler than Romania’s August peak of 24.7°C (see August).

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The September Thermal Lag Advantage

Because seawater has a high specific heat capacity, it acts as a massive thermal battery. Southern European and Mediterranean basins absorb solar energy all summer, reaching maximum heat storage by late August. In September, while air temperatures drop, the water releases heat slowly, which creates sea temperatures that are typically 3°C to 5°C warmer than in June.

CYPRUS (AYIA NAPA / PROTARAS)

27.5°C

Effortless swimming

TURKEY (ANTALYA / KAŞ)

27.3°C

Warm bathwater

GREECE (CRETE / RHODES)

25.4°C

Extended season

MALTA & GOZO

26.1°C

Crystal clear