#1 in September
26.2°C
NOAA Season Curve (May–Oct):
M
19.8°
J
22.7°
J
25.4°
A
27.1°
S
26.2°
O
24.0°
N
21.4°
NOAA SATELLITE DATA (1991–2020 30-YEAR CLIMATOLOGY)
GRGreece Sea Temperature in September
Historical 30-year sea surface temperatures across 67 coastlines in Greece 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.
24.4°C
Pleasant & Comfortableaverage across 67 surveyed coastlines in Greece, September
- Ranges 23.0°C at Seychelles Beach to 26.2°C at Tsambika Beach.
- All 67 surveyed coastlines are at or above the 21°C swim threshold.
- On the national average, the water is above 21°C from 3 Jun to 29 Oct — about 148 days a year.
- 1.0°C cooler than Greece’s August peak of 25.4°C (see August).
Select Month
View 12-Month Annual Overview →Aegean Meltemi Winds vs Deep Ionian & Cretan Basins
In the Aegean Sea, strong dry northerly winds (the Meltemi) in July and August induce localized vertical water mixing and localized upwelling, keeping surface temperatures around 24–25°C despite scorching ambient air temperatures. In contrast, the sheltered southern Ionian and southern Crete reach 26.3–26.8°C.
Oceanographic Phenomenon:Meltemi Wind Mixing & Southern Solar Radiation
Thermal Lag Characteristic:Strong eastern Mediterranean thermal lag: October waters across Rhodes and Crete remain remarkably mild (22.8–23.5°C), warmer than early June (21.5°C).
Peak Bathing Average:August (26.3°C)
Statutory Tourism Sources:
chaniatourism.grvisit.corfu.grvisitgreece.grvisitkefaloniaisland.grmilos.grThe 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
Greece Beaches in September
Individual coordinate lookups from NOAA 0.25° marine grid.
Showing 67 coastlines
Explore Sea Temperatures by Country
Spain(23.6°C)Italy(25.9°C)Turkey(27.3°C)France(22.4°C)Greece(25.4°C)Cyprus(27.7°C)Croatia(25.2°C)Albania(25.5°C)Montenegro(25.7°C)Malta(26.7°C)Bulgaria(25.1°C)Romania(24.7°C)Slovenia(25.4°C)Portugal(20.7°C)Poland(19°C)Sweden(18.3°C)Netherlands(18.5°C)Bosnia & Herzegovina(25.2°C)Monaco(24.6°C)Latvia(18.5°C)Estonia(18°C)Lithuania(18.8°C)Germany(18.6°C)Denmark(18°C)Norway(15.3°C)Belgium(18.7°C)Faroe Islands(10.9°C)United Kingdom(16.1°C)Ireland(15.9°C)Iceland(10.9°C)Finland(16.6°C)
