General Conditions
The Mediterranean enjoys an average of 315 cloudless days each year. During the cruising season of April to October, the skies are blue and the weather warm, with water temperatures averaging 80ºF (27ºC). Midsummer offers long evenings, glorious sunsets, and calm seas. The water temperature is about 67ºF (19°C) in low season and about 82ºF (28°C) in high season.
The spring and autumn months the wind direction is generally light from a southerly direction. July to August brings stronger winds. The eastern Mediterranean has a very small tidal range at 1-2 feet

There are two dominant winds in Greece, and these can produce conditions that require sailing experience.

  1. Lavrion will experience the Meltemi throughout the summer months and this can blow 15 - 40 knots for periods of up to 5 days. Winds blow variously north-east, north and north-west beginning in May and reaching its peak in July, slowing down in September
  2. The Sirocco: Southeast More frequent in winter, it corresponds to the passage of a depression. It can occasionally blow in April or the end of October.

The waters of the Saronic Gulf are well-protected and flat, while the Aegean and the seas around the Cyclades generally have more wind. 

Historical Weather (Averages by month):


Month

°F Max

°F Min

°C Max

°C Min

Ave Precip (in)

Ave Precip (mm)

Ave Water Temp (°F)

Ave Water Temp (°C)

Ave Wind Speed

January

55

43

13

6

2.2

55

61

16

11

February

55

43

13

6

1.9

49

59

15

14

March

61

45

16

7

1.8

46

59

15

11

April

68

50

20

10

1.1

29

61

16

10

May

77

57

25

14

0.8

21

64

18

9

June

86

66

30

19

0.4

11

70

21

10

July

90

70

32

21

0.2

5

75

24

10

August

90

70

32

21

0.3

6

75

24

10

September

84

64

29

18

0.5

12

75

24

10

October

73

57

23

14

2.1

53

70

21

13

November

64

50

18

10

2.4

61

66

19

10

December

57

46

14

8

3.0

75

63

17

11

Tides
In the eastern Mediterranean, the tide range is very small: 30 cm to 60 cm (one to two feet) including the variation of level due to atmospheric pressure and dominant winds.

Weather Forecast
When you arrive at the base, we will provide you with a weather forecast for the next 24 hours.  The weather forecast during your cruise can be seen on all television channels; Tavernas and Restaurants show weather programs just after the news at 8.50 pm.
Wind direction and speed is clearly indicated on a map.
Harbour Offices receive a weather forecast regularly. A weather forecast is also available on the web at http://www.poseidon.hmcr.gr On your radio receiver, on the Greek national station, forecasts are broadcast in Greek and English.
Time Station Frequency Radio wave:
6.30 am Athens 729 kHz 412 m
1.10 pm Corfu 1008 kHz 298 m
1.30 pm Rhodes 1494 kHz 200 m
12.00 pm Patras 1485 kHz 202 m
The Italian station, Radio One, announces forecasts for the Ionian Sea at approximately 7.40 am and 11.45 pm on 567, 657, 666, 675, 1032, and 1332 kHz frequencies.
East of the Greek archipelago the forecast is in German at approximately 9.45 am and 2.00 pm on short wave on 6150 MHz/49 m frequency. On your VHF: It is possible to call HELLAS RADIO on channel 16 in English. You will be given the weather forecast for your zone, after you give them your VHF code signal and the name of your boat.

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