Sea weather in Alonissos in Greece All the beach weather in Alonissos

All the essential weather information for enjoying the beach in Alonissos in Greece, for swimming, tanning or water sports! Our sea weather data is reliable, easy to read and updated every day.

Weather: When should you go to the beach in Alonissos over the next 7 days?

Discover the best moment to go to the beach in Alonissos in Greece this week to enjoy the best weather and calmest sea possible. Our opinion is based on reliable sea weather forecasts in Alonissos. You can see full forecasts by clicking on the day you want to see in the table below.

Date Outside temp. Our opinion
Sunday 19 July 202672°F to 81°Frecommended
Monday 20 July 202674°F to 81°Frecommended
Tuesday 21 July 202674°F to 81°Frecommended
Wednesday 22 July 202672°F to 81°Fdiscouraged
Thursday 23 July 202670°F to 79°Fdiscouraged
Friday 24 July 202670°F to 79°Fnot recommended
Saturday 25 July 202674°F to 77°Fnot recommended

Sea Weather: Your daily and hourly sea weather in Alonissos

Sea weather on Sunday 19 July 2026

On Sunday 19 July 2026, the sun will rise at 06:14 and will set at 20:48 on the beach(es) of Alonissos. The outside temperature will be a high of 81°F t and a low of 72°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 8.7mph km/h (with gusts up to 18.6mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (81°F)27°C (80°F)27°C (80°F)27°C (80°F)23°C (73°F)25°C (76°F)26°C (79°F)27°C (80°F)
Perceived temperature29°C (84°F)29°C (84°F)28°C (83°F)28°C (83°F)25°C (77°F)26°C (79°F)28°C (82°F)29°C (83°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity61%67%70%68%65%67%65%64%
Barometric pressure1011 hPa1011 hPa1013 hPa1013 hPa1013 hPa1011 hPa1011 hPa1012 hPa
Cloud cover6%12%15%13%8%0%0%3%
Heat index29°C (84°F)29°C (84°F)28°C (83°F)28°C (83°F)25°C (77°F)26°C (79°F)28°C (82°F)29°C (83°F)
Dew point19°C (66°F)20°C (68°F)20°C (69°F)20°C (68°F)16°C (61°F)18°C (65°F)19°C (66°F)20°C (67°F)
Wind
Speed9km/h (6mph)14km/h (9mph)11km/h (7mph)10km/h (6mph)13km/h (8mph)14km/h (9mph)12km/h (7mph)8km/h (5mph)
Gusts17km/h (11mph)25km/h (15mph)18km/h (11mph)16km/h (10mph)26km/h (16mph)30km/h (19mph)24km/h (15mph)17km/h (11mph)
Direction 58°
ENE
57°
ENE
75°
ENE
67°
ENE
78°
ENE
87°
E
125°
SE
33°
NNE
Wind chill27°C (81°F)27°C (80°F)27°C (80°F)27°C (80°F)23°C (73°F)25°C (76°F)26°C (79°F)27°C (80°F)
Waves
Height0.1m (0.5ft)0.2m (0.6ft)0.2m (0.8ft)0.3m (0.9ft)0.2m (0.8ft)0.2m (0.8ft)0.2m (0.7ft)0.2m (0.6ft)
Direction 80°
E
61°
ENE
52°
NE
52°
NE
54°
NE
67°
ENE
76°
ENE
66°
ENE
Period2.2 sec.2.2 sec.2.2 sec.2.2 sec.3.7 sec.3.7 sec.3.4 sec.2.2 sec.
Significant height0.4m (1.3ft)0.4m (1.3ft)0.4m (1.3ft)0.3m (1ft)0.4m (1.3ft)0.4m (1.3ft)0.2m (0.7ft)0.3m (1ft)
Sea water temperature
Water temperature24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)

Sea weather on Monday 20 July 2026

On Monday 20 July 2026, the sun will rise at 06:15 and will set at 20:47 on the beach(es) of Alonissos. The outside temperature will be a high of 81°F t and a low of 74°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 9.3mph km/h (with gusts up to 15.5mph). Wave height will be up to 0.7ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)27°C (80°F)26°C (79°F)27°C (80°F)24°C (75°F)26°C (78°F)26°C (79°F)27°C (80°F)
Perceived temperature29°C (84°F)29°C (84°F)28°C (83°F)29°C (84°F)25°C (77°F)27°C (80°F)28°C (82°F)29°C (84°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity67%71%75%72%59%60%69%70%
Barometric pressure1012 hPa1012 hPa1014 hPa1014 hPa1014 hPa1012 hPa1012 hPa1013 hPa
Cloud cover4%4%4%3%4%0%0%2%
Heat index29°C (84°F)29°C (84°F)28°C (83°F)29°C (84°F)25°C (77°F)27°C (80°F)28°C (82°F)29°C (84°F)
Dew point20°C (69°F)21°C (70°F)21°C (70°F)21°C (70°F)15°C (59°F)17°C (63°F)20°C (68°F)21°C (70°F)
Wind
Speed12km/h (7mph)15km/h (9mph)12km/h (8mph)10km/h (6mph)1km/h (0mph)10km/h (6mph)12km/h (7mph)9km/h (5mph)
Gusts21km/h (13mph)25km/h (16mph)19km/h (12mph)16km/h (10mph)2km/h (1mph)21km/h (13mph)24km/h (15mph)18km/h (11mph)
Direction 52°
NE
18°
NNE
29°
NNE
336°
NNW
56°
NE
136°
SE
135°
SE
82°
E
Wind chill27°C (80°F)27°C (80°F)26°C (79°F)27°C (80°F)24°C (75°F)26°C (78°F)26°C (79°F)27°C (80°F)
Waves
Height0.1m (0.5ft)0.1m (0.5ft)0.2m (0.7ft)0.2m (0.6ft)0.1m (0.5ft)0.2m (0.5ft)0.2m (0.7ft)0.1m (0.5ft)
Direction 71°
ENE
59°
ENE
52°
NE
52°
NE
55°
NE
53°
NE
105°
ESE
103°
ESE
Period2.0 sec.2.0 sec.2.0 sec.3.3 sec.3.7 sec.4.1 sec.2.0 sec.2.5 sec.
Significant height0.3m (1ft)0.4m (1.3ft)0.3m (1ft)0.3m (1ft)0.2m (0.7ft)0.4m (1.3ft)0.5m (1.6ft)0.2m (0.7ft)
Sea water temperature
Water temperature24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)

Sea weather on Tuesday 21 July 2026

On Tuesday 21 July 2026, the sun will rise at 06:16 and will set at 20:47 on the beach(es) of Alonissos. The outside temperature will be a high of 81°F t and a low of 74°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 11.8mph km/h (with gusts up to 18.6mph). Wave height will be up to 1ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)27°C (80°F)27°C (80°F)27°C (81°F)24°C (75°F)25°C (78°F)26°C (79°F)27°C (80°F)
Perceived temperature29°C (84°F)29°C (84°F)29°C (84°F)30°C (86°F)25°C (78°F)27°C (80°F)28°C (82°F)29°C (84°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity72%75%78%75%69%67%70%71%
Barometric pressure1013 hPa1013 hPa1013 hPa1014 hPa1012 hPa1010 hPa1009 hPa1009 hPa
Cloud cover4%6%4%0%3%0%4%8%
Heat index29°C (84°F)29°C (84°F)29°C (84°F)30°C (86°F)25°C (78°F)27°C (80°F)28°C (82°F)29°C (84°F)
Dew point21°C (70°F)22°C (71°F)22°C (72°F)22°C (72°F)18°C (64°F)19°C (66°F)20°C (68°F)21°C (70°F)
Wind
Speed19km/h (12mph)15km/h (9mph)12km/h (7mph)8km/h (5mph)9km/h (6mph)17km/h (11mph)14km/h (9mph)17km/h (10mph)
Gusts24km/h (15mph)24km/h (15mph)20km/h (12mph)12km/h (8mph)20km/h (12mph)21km/h (13mph)30km/h (19mph)21km/h (13mph)
Direction 32°
NNE
353°
N
351°
N
352°
N
65°
ENE
112°
ESE
145°
SE
64°
ENE
Wind chill27°C (80°F)27°C (80°F)27°C (80°F)27°C (81°F)24°C (75°F)25°C (78°F)26°C (79°F)27°C (80°F)
Waves
Height0.2m (0.6ft)0.2m (0.6ft)0.2m (0.6ft)0.1m (0.5ft)0.2m (0.5ft)0.2m (0.7ft)0.2m (0.7ft)0.3m (0.9ft)
Direction 68°
ENE
51°
NE
36°
NE
39°
NE
56°
NE
55°
NE
93°
E
70°
ENE
Period2.2 sec.2.2 sec.2.8 sec.2.6 sec.3.0 sec.3.7 sec.3.7 sec.2.2 sec.
Significant height0.4m (1.3ft)0.3m (1ft)0.4m (1.3ft)0.2m (0.7ft)0.2m (0.7ft)0.4m (1.3ft)0.3m (1ft)0.5m (1.6ft)
Sea water temperature
Water temperature24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)

Sea weather on Wednesday 22 July 2026

On Wednesday 22 July 2026, the sun will rise at 06:17 and will set at 20:46 on the beach(es) of Alonissos. The outside temperature will be a high of 81°F t and a low of 72°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 19.3mph km/h (with gusts up to 27.3mph). Wave height will be up to 3.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature27°C (80°F)26°C (79°F)26°C (78°F)26°C (79°F)22°C (72°F)24°C (76°F)26°C (79°F)25°C (78°F)
Perceived temperature29°C (85°F)28°C (83°F)28°C (82°F)28°C (83°F)25°C (76°F)26°C (79°F)29°C (84°F)27°C (81°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity74%79%78%72%67%70%76%79%
Barometric pressure1010 hPa1010 hPa1010 hPa1011 hPa1010 hPa1009 hPa1009 hPa1011 hPa
Cloud cover5%0%2%3%3%7%20%44%
Heat index29°C (85°F)28°C (83°F)28°C (82°F)28°C (83°F)25°C (76°F)26°C (79°F)29°C (84°F)27°C (81°F)
Dew point22°C (71°F)22°C (72°F)22°C (71°F)21°C (69°F)16°C (61°F)18°C (65°F)22°C (71°F)21°C (71°F)
Wind
Speed27km/h (17mph)18km/h (11mph)13km/h (8mph)13km/h (8mph)4km/h (2mph)8km/h (5mph)1km/h (1mph)31km/h (19mph)
Gusts44km/h (27mph)25km/h (16mph)19km/h (12mph)17km/h (11mph)8km/h (5mph)16km/h (10mph)2km/h (1mph)43km/h (27mph)
Direction 30°
NNE

N
342°
NNW
335°
NNW
111°
ESE
123°
ESE
43°
NE
55°
NE
Wind chill27°C (80°F)26°C (79°F)26°C (78°F)26°C (79°F)22°C (72°F)24°C (76°F)26°C (79°F)25°C (78°F)
Waves
Height0.6m (1.9ft)0.6m (2.0ft)0.8m (2.6ft)1.0m (3.3ft)0.9m (2.9ft)0.6m (2.1ft)0.4m (1.3ft)0.3m (1.0ft)
Direction 44°
NE
29°
NNE
323°
NW
318°
NW
321°
NW
328°
NNW
341°
NNW

N
Period2.1 sec.4.1 sec.4.3 sec.4.6 sec.5.3 sec.5.2 sec.4.6 sec.4.0 sec.
Significant height0.8m (2.6ft)1.0m (3.3ft)1.0m (3.3ft)0.8m (2.6ft)1.0m (3.3ft)0.8m (2.6ft)0.5m (1.6ft)0.6m (2ft)
Sea water temperature
Water temperature24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)

Sea weather on Thursday 23 July 2026

On Thursday 23 July 2026, the sun will rise at 06:17 and will set at 20:45 on the beach(es) of Alonissos. The outside temperature will be a high of 79°F t and a low of 70°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! The sea will be generally calm, with a wind speed of up to 15.5mph km/h (with gusts up to 21.8mph). Wave height will be up to 2.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature25°C (78°F)25°C (77°F)25°C (77°F)25°C (77°F)21°C (71°F)23°C (74°F)25°C (78°F)26°C (78°F)
Perceived temperature27°C (81°F)27°C (80°F)27°C (80°F)27°C (80°F)21°C (71°F)25°C (77°F)27°C (80°F)27°C (81°F)
Precipitation0in0in0in0in0in0in0in0in
Humidity77%74%74%71%65%63%64%66%
Barometric pressure1011 hPa1011 hPa1012 hPa1012 hPa1010 hPa1009 hPa1008 hPa1008 hPa
Cloud cover17%35%26%13%10%6%23%18%
Heat index27°C (81°F)27°C (80°F)27°C (80°F)27°C (80°F)24°C (76°F)25°C (77°F)27°C (80°F)27°C (81°F)
Dew point21°C (70°F)20°C (68°F)20°C (68°F)19°C (67°F)15°C (58°F)16°C (60°F)18°C (64°F)19°C (66°F)
Wind
Speed25km/h (16mph)20km/h (13mph)15km/h (10mph)16km/h (10mph)14km/h (9mph)9km/h (5mph)6km/h (4mph)2km/h (1mph)
Gusts35km/h (22mph)28km/h (17mph)21km/h (13mph)21km/h (13mph)29km/h (18mph)17km/h (11mph)9km/h (5mph)3km/h (2mph)
Direction 46°
NE
40°
NE
39°
NE
47°
NE
46°
NE
103°
ESE
257°
WSW
317°
NW
Wind chill25°C (78°F)25°C (77°F)25°C (77°F)25°C (77°F)21°C (71°F)23°C (74°F)25°C (78°F)26°C (78°F)
Waves
Height0.4m (1.2ft)0.7m (2.2ft)0.6m (2.1ft)0.5m (1.7ft)0.5m (1.5ft)0.3m (1.1ft)0.2m (0.8ft)0.2m (0.6ft)
Direction 44°
NE
46°
NE
50°
NE
46°
NE
45°
NE
54°
NE
53°
NE
54°
NE
Period3.6 sec.3.6 sec.3.6 sec.3.6 sec.2.9 sec.4.2 sec.4.5 sec.4.2 sec.
Significant height0.4m (1.3ft)0.9m (3ft)0.7m (2.3ft)0.7m (2.3ft)0.5m (1.6ft)0.4m (1.3ft)0.4m (1.3ft)0.3m (1ft)
Sea water temperature
Water temperature24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)

Sea weather on Friday 24 July 2026

On Friday 24 July 2026, the sun will rise at 06:18 and will set at 20:44 on the beach(es) of Alonissos. The outside temperature will be a high of 79°F t and a low of 70°F. There will be little to no precipitation today, so unless you go swimming, you can enjoy the beach and stay dry! Be careful, the sea will be generally rough with a wind speed of up to 28mph km/h (with gusts up to 38.5mph). Wave height will be up to 6.2ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature26°C (78°F)25°C (77°F)25°C (77°F)25°C (76°F)21°C (70°F)25°C (77°F)25°C (77°F)25°C (77°F)
Perceived temperature28°C (82°F)27°C (80°F)26°C (79°F)26°C (79°F)21°C (70°F)27°C (80°F)27°C (80°F)27°C (80°F)
Precipitation0in0in0in0in0in0in0.1in0in
Humidity70%70%68%68%63%70%68%66%
Barometric pressure1007 hPa1006 hPa1006 hPa1004 hPa1003 hPa1000 hPa1000 hPa1001 hPa
Cloud cover22%15%27%27%14%28%52%48%
Heat index28°C (82°F)27°C (80°F)26°C (79°F)26°C (79°F)24°C (76°F)27°C (80°F)27°C (80°F)27°C (80°F)
Dew point20°C (68°F)19°C (67°F)19°C (65°F)18°C (65°F)14°C (57°F)19°C (67°F)19°C (66°F)19°C (65°F)
Wind
Speed12km/h (8mph)22km/h (13mph)18km/h (11mph)24km/h (15mph)23km/h (14mph)27km/h (17mph)6km/h (4mph)45km/h (28mph)
Gusts18km/h (11mph)30km/h (18mph)24km/h (15mph)33km/h (20mph)24km/h (15mph)40km/h (25mph)9km/h (6mph)62km/h (39mph)
Direction 61°
ENE
82°
E
84°
E
79°
ENE
69°
ENE
56°
NE
84°
E
63°
ENE
Wind chill26°C (78°F)25°C (77°F)25°C (77°F)25°C (76°F)21°C (70°F)25°C (77°F)25°C (77°F)25°C (77°F)
Waves
Height0.2m (0.6ft)0.2m (0.8ft)0.5m (1.6ft)0.9m (2.9ft)1.0m (3.3ft)1.2m (3.9ft)1.9m (6.2ft)1.8m (5.8ft)
Direction 56°
NE
58°
ENE
54°
NE
52°
NE
50°
NE

N
321°
NW
322°
NW
Period1.7 sec.1.7 sec.1.7 sec.1.7 sec.1.7 sec.5.2 sec.5.0 sec.5.0 sec.
Significant height0.4m (1.3ft)0.5m (1.6ft)0.6m (2ft)1.0m (3.3ft)1.2m (3.9ft)2.2m (7.2ft)1.9m (6.2ft)1.5m (4.9ft)
Sea water temperature
Water temperature24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)24°C (75°F)

Sea weather on Saturday 25 July 2026

On Saturday 25 July 2026, the sun will rise at 06:19 and will set at 20:43 on the beach(es) of Alonissos. The outside temperature will be a high of 77°F t and a low of 74°F. Precipitation is in the forecast (0.1in throughout the day): choose the right time to go to the beach and dodge the raindrops. Be careful, the sea will be generally rough with a wind speed of up to 34.2mph km/h (with gusts up to 42.9mph). Wave height will be up to 4.3ft today.

0:003:006:009:0012:0015:0018:0021:00
Weather
Sky condition
Outside temperature24°C (76°F)24°C (74°F)23°C (73°F)24°C (75°F)24°C (75°F)23°C (74°F)24°C (75°F)25°C (77°F)
Perceived temperature26°C (78°F)25°C (78°F)25°C (77°F)25°C (78°F)25°C (78°F)25°C (77°F)25°C (78°F)26°C (79°F)
Precipitation0in0in0.1in0in0in0in0in0in
Humidity66%69%76%67%64%62%59%60%
Barometric pressure1002 hPa1003 hPa1005 hPa1006 hPa1006 hPa1006 hPa1007 hPa1008 hPa
Cloud cover62%100%100%72%26%6%23%14%
Heat index26°C (78°F)25°C (78°F)25°C (77°F)25°C (78°F)25°C (78°F)25°C (77°F)25°C (78°F)26°C (79°F)
Dew point17°C (63°F)17°C (63°F)18°C (65°F)17°C (63°F)17°C (62°F)16°C (60°F)15°C (59°F)16°C (62°F)
Wind
Speed49km/h (31mph)55km/h (34mph)45km/h (28mph)46km/h (29mph)31km/h (19mph)17km/h (11mph)8km/h (5mph)12km/h (8mph)
Gusts63km/h (39mph)69km/h (43mph)57km/h (35mph)53km/h (33mph)48km/h (30mph)29km/h (18mph)12km/h (7mph)17km/h (11mph)
Direction 44°
NE
27°
NNE
30°
NNE
26°
NNE
14°
NNE
359°
N

N
292°
WNW
Wind chill24°C (76°F)24°C (74°F)23°C (73°F)24°C (75°F)24°C (75°F)23°C (74°F)24°C (75°F)25°C (77°F)
Waves
Height1.3m (4.3ft)1.2m (4.0ft)1.0m (3.2ft)0.7m (2.3ft)0.6m (1.9ft)0.4m (1.5ft)0.4m (1.2ft)0.3m (0.9ft)
Direction 324°
NW
325°
NW
331°
NNW
336°
NNW
341°
NNW
11°
NNE
11°
NNE
337°
NNW
Period5.0 sec.5.0 sec.5.4 sec.4.9 sec.4.6 sec.5.0 sec.4.9 sec.4.5 sec.
Significant height1.2m (3.9ft)1.1m (3.6ft)1.3m (4.3ft)0.9m (3ft)0.7m (2.3ft)0.5m (1.6ft)0.6m (2ft)0.4m (1.3ft)
Sea water temperature
Water temperature26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)26°C (78°F)

Sea weather chart over the next 7 days

Outside temperature

Wind speed

Precipitation

Wave height

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