PORT BLAIR: The Indian Meteorological Department, Kolkata has forecast rain or thundershowers at many places over Andaman and Nicobar islands in the next three days. Under the influence of moderate to strong Southwest Monsoon current, strong Southwesterly wind speed between 25 and 35 kmph gusting to 45 kmph and generally rough seas are likely along and off Andaman and Nicobar coasts. Fishermen have been advised to be cautious while venturing into the sea.