Greece

Greek Islands weather by month & best time to visit

Climate for 13 places on the Greek islands from 30 years of weather data. Best time to visit: June – September. August is the warmest month with 28 °C, January the coolest with 14 °C.

Best timeJun – SepScore 100 out of 100

Warmest monthAugust28 °C by day

Warmest sea26°Cin August

Driest monthJuly1 rainy day

Best time to visit the Greek islands

The best time to visit the Greek islands is June – September: days of 25–28 °C, 11 hours of sunshine a day and 2 rainy days a month on average. The sea is 23–26 °C then. It reaches 20 °C, warm enough for most swimmers, from June to November. Most rainy days fall in January (12).

Greek Islands weather by month

Long-term averages of 13 places: the score is their mean, temperatures range from the coolest to the warmest place. Best months are marked; open a month for details.

Month	Score	Air	Sea	Sun	Rain days
JanuaryJan	15	13–15°	16–18°	5 h	12
FebruaryFeb	19	13–15°	15–17°	5 h	10
MarchMar	26	14–17°	15–17°	7 h	9
AprilApr	36	16–21°	16–18°	8 h	6
MayMay	61	20–26°	18–20°	9 h	4
JuneJun	92	23–29°	21–23°	11 h	1
JulyJul	99	25–31°	23–26°	11 h	1
AugustAug	100	26–31°	24–27°	11 h	1
SeptemberSep	95	24–28°	23–26°	9 h	3
OctoberOct	67	20–24°	21–24°	7 h	6
NovemberNov	34	17–20°	19–22°	5 h	9
DecemberDec	17	14–16°	17–20°	4 h	12

Where is it warmest on the Greek islands?

Compared in the coolest and the warmest month. Sunshine is the average per day over the year; rainy days are counted over the whole year.

Place	Jan	Aug	Sea Jan	Sun h/day	Rain days/yr
Crete	15°	30°	16°	8.1	77
Lindos, Rhodes	14°	30°	18°	8.2	64
Rhodes Town	14°	29°	18°	8.1	64
Argostoli, Kefalonia	14°	28°	16°	7.9	89
Kos Town	14°	27°	18°	7.5	71
Naxos	14°	26°	17°	7.9	52
Parikia, Paros	14°	26°	16°	7.8	53
Zakynthos Town	13°	30°	16°	7.6	90
Lefkada	13°	29°	16°	7.3	99
Corfu Town	13°	28°	16°	7.3	104
Santorini	13°	26°	17°	7.8	53
Mykonos	13°	26°	16°	8.0	55

In January, it is warmest in Crete with 15 °C, ahead of Lindos, Rhodes (14 °C).

Destinations on the Greek islands13

Argostoli, Kefalonia
Sun, sea & sandBest time to visit:Jun – Sep
1. 14
2. 19
3. 25
4. 35
5. 58
6. 95
7. 100
8. 100
9. 95
10. 62
11. 26
12. 14
Chania, Crete
Sun, sea & sandBest time to visit:Jun – Sep
1. 10
2. 15
3. 23
4. 35
5. 64
6. 95
7. 100
8. 100
9. 99
10. 65
11. 31
12. 12
Corfu Town
Sun, sea & sandBest time to visit:Jun – Sep
1. 14
2. 18
3. 21
4. 27
5. 51
6. 92
7. 100
8. 100
9. 86
10. 53
11. 22
12. 12
Fira, Santorini
Sun, sea & sandBest time to visit:Jul – Sep
1. 14
2. 20
3. 28
4. 38
5. 50
6. 83
7. 99
8. 100
9. 92
10. 61
11. 36
12. 18
Heraklion, Crete
Sun, sea & sandBest time to visit:Jun – Sep
1. 19
2. 23
3. 28
4. 49
5. 83
6. 95
7. 99
8. 100
9. 100
10. 82
11. 45
12. 23
Kos Town
Sun, sea & sandBest time to visit:Jun – Sep
1. 17
2. 18
3. 26
4. 34
5. 59
6. 92
7. 100
8. 100
9. 100
10. 73
11. 39
12. 21
Lefkada
Sun, sea & sandBest time to visit:Jun – Sep
1. 13
2. 17
3. 22
4. 28
5. 61
6. 96
7. 100
8. 100
9. 92
10. 59
11. 24
12. 12
Lindos, Rhodes
Sun, sea & sandBest time to visit:Jun – Oct
1. 17
2. 20
3. 29
4. 40
5. 72
6. 96
7. 100
8. 100
9. 100
10. 85
11. 45
12. 21
Mykonos
Sun, sea & sandBest time to visit:Jun – Sep
1. 13
2. 20
3. 28
4. 38
5. 51
6. 85
7. 97
8. 100
9. 93
10. 61
11. 32
12. 15
Naxos
Sun, sea & sandBest time to visit:Jun – Sep
1. 14
2. 20
3. 28
4. 39
5. 53
6. 85
7. 97
8. 100
9. 94
10. 62
11. 33
12. 17
Parikia, Paros
Sun, sea & sandBest time to visit:Jun – Sep
1. 14
2. 20
3. 28
4. 39
5. 54
6. 87
7. 99
8. 100
9. 95
10. 64
11. 33
12. 15
Rhodes Town
Sun, sea & sandBest time to visit:Jun – Sep
1. 17
2. 21
3. 29
4. 39
5. 66
6. 95
7. 100
8. 100
9. 100
10. 83
11. 45
12. 22
Zakynthos Town
Sun, sea & sandBest time to visit:Jun – Sep
1. 14
2. 18
3. 23
4. 33
5. 66
6. 95
7. 100
8. 100
9. 93
10. 67
11. 27
12. 15

Greek Islands weather: quick answers

When is the best time to visit the Greek islands?

The best time to visit the Greek islands is June – September: days reach 25–28 °C, with 11 hours of sunshine a day and 2 rainy days a month on average.

What is the warmest month on the Greek islands?

August is the warmest month, with daytime highs of 28 °C on average (26–31 °C depending on the place). The coolest is January with 14 °C.

How warm is it on the Greek islands in January?

In January, the coolest month, days reach 13–15 °C on average and the sea is 16–18 °C.

When can you swim on the Greek islands?

The sea is 20 °C or warmer from June to November and warmest in August with 26 °C.

Where is it warmest on the Greek islands?

In January, the warmest are Crete (15 °C), Lindos, Rhodes (14 °C) and Rhodes Town (14 °C).

When does it rain most on the Greek islands?

January has the most rainy days (12 on average), July the fewest (1).

Islands

Greece: all destinations All islands & regions

Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)