Port Blair, June 07: Heavy rain (7 to 12 cm) may occur at isolated places over A&N Islands during next 48 hours. Meanwhile a warning for fishermen has also been issued. “Under the influence of strong southwest monsoon current, strong southwest to westerly wind speed between 45 and 55 kmph gusting to 65 kmph and rough to very rough seas likely along and off A&N coast. Fishermen are advised not to venture into the sea,” a release from Administration said here today. Local Cautionary Signal No. III hoisted at Port Blair Port as per IMD Kolkata.