Peak in August
Coolest in January
Heavy in December
Peak in dry season
Sea Temperature
Coastal Waters(Ocean)
Annual Average
Comfortable for most swimmers
Based on average sea surface temperature
Ocean
Hydra coastline
Hydra Monthly Weather Guide
Click any month to explore daily weather forecasts
January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for Hydra
Currency
EUR
€ Euro
Language
Greek
Driving
Right side
Connect
As of Aug 2022, the main town has 4G fro...
Safety
High Safety
GPI: 1.838
Best Time to Visit Hydra
Location, climate overview & historical trends
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📍 37.3478° N, 23.4621° E
Open in Google MapsHydra is a prominent destination in Greece.
Located at 37.35°N latitude,Hydra experiences a temperate climate with four distinct seasons.
Based on 30 years of data, August is the warmest month (avg. 32°C), while January is the coolest. December sees the most rain (18% chance), making July the driest month.
Historical Climate Trend
30-Year Analysis+3.04°C
Total over 30 years
+1.01°C
Per decade
Linear regression analysis of historical maximum temperatures for Hydra, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)March, April, May
Best months to visit
22°C
Avg High
Based on 30 years of NASA satellite data,Hydra receives approximately 146mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
20.4°
2024 Avg
23.1°
2040 Proj
23.6°
+1.01°C
per decade (observed)
+0.31°C
per decade (CMIP6)
🌡️ Hydra has warmed by +3.0°C since 1995. By 2040, an additional +0.5°C is projected (based on CMIP6 rate of 0.311°C/decade), for a total of +3.5°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
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Health & Safety Advisory
CDC travel health recommendations
COVID-19
All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.
Hepatitis A
Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.
Hepatitis B
Recommended for unvaccinated travelers younger than 60 years old traveling to Greece. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Greece.
Measles
Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.
Rabies
Dogs infected with rabies are not commonly found in Greece.If rabies exposures occur while in Greece, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.
Yellow Fever
CDC recommendations:Vaccine isnotrecommended.Country entry requirements:Vaccine isnotrequired.Updated April 23, 2025
Source: CDC Travelers' Health
View Complete Health GuideHydra Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 13°C | 15% | Neutral |
| February | 14°C | 16% | Neutral |
| March | 16°C | 12% | 😊 Pleasant |
| April | 19°C | 9% | 😊 Pleasant |
| May | 24°C | 6% | ✨ Perfect |
| June | 29°C | 4% | 😊 Pleasant |
| July | 32°C | 1% | 🔥 Hot |
| August | 32°C | 2% | 🔥 Hot |
| September | 28°C | 7% | ✨ Perfect |
| October | 23°C | 9% | ✨ Perfect |
| November | 19°C | 14% | 😊 Pleasant |
| December | 15°C | 18% | 😊 Pleasant |
Weather in Cities Near Hydra
Explore climate data for popular destinations within easy reach
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Naxos
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Santorini
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Compare weather conditions with nearby destinations for your trip planning
Compare Hydra Weather vs Popular Destinations
Hydra Weather FAQ
When is the best time to visit Hydra?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, March, April, May are usually great choices.
When is the hottest month in Hydra?
August is historically the hottest month in Hydra with average highs of 32°C.
When does it rain the most in Hydra?
December typically sees the highest probability of rain (18%).
Is Hydra expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.