PORTSMOUTH TIDE TABLES 2023-24 All times GMT. BST: +1 hour from 01:00 26 March - 02:00 29 October 2023 0 0 ENGLAND, SOUTH COAST, PORTSMOUTH. LAT 5048’N LONG 107’W ABLES TIME ZONE UT (GMT). TIMES & HEIGHTS OF HIGH & LOW WATER AUG 2023 KEY: Full Moon SEPT 2023 BST add New Moon one hour TIME m TIME m TIME m TIME m TSMOUTH TIDE T POR 153 solenthandbook.com