Sea level rise in Athens: how high will the water get?
Under intermediate emissions, sea level at Athens is projected to rise about 13 cm by 2050 and 37 cm by 2100 compared with 1995–2014 — or 57 cm if emissions stay very high. That is 19 cm less than the global average, because the land around Athens is still rising after the last Ice Age, partly offsetting the higher sea.
Projected sea level rise at Athens, 2020–2150 (cm vs 1995–2014)
| Year | Low | Intermediate | Very high |
|---|---|---|---|
| 2030 | +6 cm (1–12) | +6 cm (1–11) | +6 cm (1–12) |
| 2050 | +12 cm (4–22) | +13 cm (6–22) | +16 cm (8–26) |
| 2070 | +19 cm (8–32) | +22 cm (11–37) | +28 cm (15–45) |
| 2100 | +27 cm (9–49) | +37 cm (20–62) | +57 cm (36–86) |
| 2150 | +40 cm (9–79) | +62 cm (28–108) | +100 cm (56–162) |
What it means for Athens
The average rise is only part of the story. What people notice first is flooding: higher seas let ordinary high tides and storm surges reach further inland. The IPCC projects that extreme sea levels which used to occur once a century will happen at least once a year at more than half of the world's tide gauge locations by 2100.
Sea level will keep rising for centuries even after emissions stop, because the deep ocean keeps warming and ice sheets keep melting. Under very high emissions, rises well beyond these ranges cannot be ruled out if parts of the Antarctic ice sheet become unstable — see tipping points.
To see which streets are at risk, use a local flood map: the projections here can be explored station by station in the NASA Sea Level Projection Tool.
Athens climate in 2050Global sea level todayAll coastal cities
Frequently asked questions
Will Athens be underwater?
Not in the sense of the whole city disappearing this century, but the sea at Athens is projected to rise about 37 cm by 2100 under intermediate emissions (likely range 20–62 cm), and about 57 cm under very high emissions. Low-lying districts face more frequent flooding from high tides and storm surges well before then; whether a specific street floods depends on local elevation and flood defences.
How much will sea level rise in Athens by 2050?
About 13 cm (5 inches) compared with 1995–2014 under an intermediate scenario, with a likely range of 6–22 cm. Up to 2050 the emissions scenarios give similar results, because much of this rise is already locked in.
Why is sea level rise in Athens different from the global average?
Projections at a single coast include vertical land motion (sinking or rising land), changes in ocean currents and the gravitational effects of melting ice sheets. That is 19 cm less than the global average, because the land around Athens is still rising after the last Ice Age, partly offsetting the higher sea.
Source: IPCC AR6 Sea Level Projections (Garner et al. 2021; Fox-Kemper et al. 2021), via the NASA Sea Level Projection Tool. Global averages: IPCC AR6 WG1 Table 9.9.
Licence: CC BY 4.0. Relative sea level change incl. vertical land motion, vs 1995–2014, medium confidence; likely range = 17th–83rd percentile.