The Istanbul Metropolitan Municipality Disaster Coordination Center (AKOM) and the Istanbul Governor's Office have issued warnings against heavy rainfall and strong winds expected to affect the city.
According to AKOM's weekly weather forecast report, strong winds and heavy rainfall will be effective in Istanbul starting from the morning hours of Tuesday, October 27. Sharing the assessments of the Turkish State Meteorological Service, the Governor's Office stated that the precipitation will begin tonight and intensify tomorrow morning.
SPECIFIC TIMES GIVEN FOR RAINFALL IN ISTANBUL
According to the statement from the Istanbul Governor's Office, the heavy rain and thunderstorms expected to begin tonight will intensify starting from the morning of Tuesday, October 27. The amount of precipitation is expected to be between 21 and 50 kilograms per square meter across the city.
According to the assessments of the Turkish State Meteorological Service; ??? In our province, the heavy rain and thunderstorms expected tonight (26.10.2026) are expected to be strong (21-50 kg/m2) starting from tomorrow (27.10.2026) morning hours; and very strong (21-75 kg/m2) in the northern parts (Arnavutköy, Sarıyer, Beykoz, Eyüp, and Şile). ??? The heavy rainfall is estimated to lose its effect tomorrow evening. ?? The wind is estimated to blow from northern directions as strong (40-60 km/h), and occasionally as short-term storms (70 km/h). ??? Temperatures are expected to decrease significantly tomorrow (27.10.2026) with the rainfall, remaining 3 to 5°C below seasonal norms. ?????? Our citizens are kindly requested to be careful and cautious against negative conditions such as floods, water inundation, strong winds during rainfall, and disruptions in transportation.
— TC İstanbul Valiliği (@TC_istanbul) October 26, 2026
In Arnavutköy, Sarıyer, Beykoz, Eyüpsultan, and Şile, the rainfall is estimated to be very strong. It was stated that 21 to 75 kilograms of precipitation per square meter could fall in these districts.
The heavy rainfall is expected to lose its effect on Tuesday evening.
WIND SPEEDS MAY REACH 70 KILOMETERS
The Governor's Office also issued a warning against strong winds that will be effective along with the rainfall. It is predicted that the wind, which will blow from northern directions, will reach speeds of 40 to 60 kilometers per hour, and occasionally rise to 70 kilometers per hour in the form of short-term storms.
AKOM's forecast report also stated that northern winds will blow at speeds of 40 to 60 kilometers per hour starting from 06:00 on Tuesday.
AIR TEMPERATURES WILL DROP
Air temperatures in Istanbul are expected to decrease significantly along with the heavy rainfall. According to the Governor's Office statement, temperatures will drop 3 to 5 degrees below seasonal norms.
AKOM reported that temperatures will drop by 5 to 7 degrees in a short time. The lowest temperature in Istanbul on Tuesday is expected to be 10 degrees, and the highest is expected to be 15 degrees.
HEAVY RAIN ALSO EXPECTED ON OCTOBER 29
AKOM's weekly forecast report also included a heavy rain warning for Thursday, October 29. On the day Republic Day is celebrated, temperatures in Istanbul are expected to range between 12 and 16 degrees, with precipitation amounts expected to be between 20 and 50 kilograms per square meter.
While light rain is forecast for Wednesday, October 28, intermittent light rain is also expected on Friday, October 30, Saturday, October 31, and Sunday, November 1.
FLOOD AND WATER INUNDATION WARNING FROM THE GOVERNOR'S OFFICE
The Istanbul Governor's Office asked citizens to be careful and cautious against potential negative conditions due to heavy rain and wind.
The statement indicated that necessary precautions should be taken against risks such as floods, water inundation, strong winds during rainfall, and disruptions in transportation.
News Source: 12punto
