Is Patras sunnier than Zakynthos?

Zakynthos is the sunnier: about 2,970 hours of sunshine a year versus 2,829 — a difference of 141 hours.

Which is warmer, Patras or Zakynthos?

Patras is warmer across the year: average daytime highs of 23°C (73°F) versus 21°C.

Which is better in winter (November–February), Patras or Zakynthos?

They are close in the November–February window: Patras averages 50/100 (about 16°C days), Zakynthos 48/100 (about 16°C).

Which has the warmer sea, Patras or Zakynthos?

Patras — its sea peaks at about 29°C (84°F) versus 28°C.

Patras vs Zakynthos: which is sunnier?

🇬🇷 Greece vs 🇬🇷 Greece · 65 km apart · long-term climate normals (NASA POWER, 2001–2020)

Zakynthos is the sunnier overall: about 2,970 hours of sunshine a year to Patras's 2,829. Patras has the higher Sunshine Score in 4 of 12 months, Zakynthos in 2 (6 within 2 points).

Scores are the 0–100 Sunshine Score — sunshine, daytime warmth and dryness in one number, per month.

At a glance

	Patras	Zakynthos
Sunshine hours / year	2,829	2,970
Sunniest month	July (93/100)	July (95/100)
Nov–Feb average score	50/100	48/100
Jun–Aug average score	90/100	94/100
Rain / year	717 mm	822 mm
Warmest sea	29°C / 84°F	28°C / 82°F
Peak midday UV	9 (very high)	10 (very high)

Patras vs Zakynthos month by month

Month	Sunshine Score		Day high °C		Rain mm		Sea °C
Month	Patras	Zakynthos	Patras	Zakynthos	Patras	Zakynthos	Patras	Zakynthos
January	38	38	14°	14°	106	116	17°	18°
February	41	40	14°	14°	79	88	16°	17°
March	63	49	17°	15°	63	70	16°	17°
April	89	74	20°	18°	36	40	18°	17°
May	91	92	24°	21°	24	24	20°	19°
June	92	93	29°	26°	21	17	25°	24°
July	93	95	32°	29°	16	11	28°	27°
August	84	94	33°	29°	13	15	29°	28°
September	86	84	28°	26°	55	71	27°	26°
October	81	78	24°	23°	79	100	24°	24°
November	77	68	20°	19°	104	125	21°	22°
December	43	47	15°	16°	121	145	18°	18°

The sunnier month by month: Jan even · Feb even · Mar Patras · Apr Patras · May even · Jun even · Jul even · Aug Zakynthos · Sep even · Oct Patras · Nov Patras · Dec Zakynthos.

When to pick which

November–February: too close to call — Patras averages 50/100, Zakynthos 48/100. Daytime highs are similar (16°C vs 16°C). See the winter sun ranking.
March–May: Patras (average score 81/100 vs 72). Patras is the warmer, around 20°C daytime highs vs 18°C.
June–August: Zakynthos (average score 94/100 vs 90). Patras is the warmer, around 31°C daytime highs vs 28°C.
September–October: Patras (average score 84/100 vs 81). Daytime highs are similar (26°C vs 25°C).

Sea temperature

Patras's sea gets warmer: 29°C / 84°F at its peak vs 28°C. Swimmable water (21°C+): Patras about 6 months a year, Zakynthos about 6 months a year. Month-by-month sea temperatures are in the table above.

Full month-by-month guides: Patras weather by month · Zakynthos weather by month · Best time to visit Greece.

More comparisons: Patras vs Kalamata · Patras vs Kefallinia · Patras vs Preveza · Zakynthos vs Kalamata · Zakynthos vs Kefallinia · all head-to-heads