WAT ↔ GMT Time Converter

Greenwich Mean Time (GMT) is 1h behind of West Africa Time (WAT). WAT runs at UTC+1 and GMT at UTC+0 / UTC+1 (BST). Quick time examples: 8:00 AM WAT = 7:00 AM GMT; 12:00 PM WAT = 11:00 AM GMT; 5:00 PM WAT = 4:00 PM GMT.

To convert WAT to GMT, subtract 1 hour to the WAT time. For example, 12:00 PM WAT becomes 11:00 AM GMT. When the result crosses midnight, advance the date by one day (shown as "+1 Day" in the converter). The converter on this page handles all arithmetic and date-rollover automatically.

Greenwich Mean Time (GMT) is 1h behind of West Africa Time (WAT). Reversed: WAT is 1h ahead of GMT. Practical example: noon in London (12:00 PM GMT) corresponds to 1:00 PM WAT in Lagos, and 5 PM in London corresponds to 6:00 PM WAT.

West Africa Time (WAT) is the standard civil time for Lagos and the surrounding region, operating at UTC+1 from UTC. It does not observe Daylight Saving Time; the UTC offset stays at UTC+1 every day of the year. Major cities: Lagos, Kano, Ibadan, Abuja, Port Harcourt, Benin City, Kaduna.

Greenwich Mean Time (GMT) covers London and the surrounding region at UTC+0 / UTC+1 (BST) from UTC. It observes Daylight Saving Time and shifts its clocks seasonally. Cities in this zone: London, Dublin, Lisbon, Reykjavik, Accra, Abidjan, Dakar.

Yes. GMT observes Daylight Saving Time and shifts its clocks by one hour in summer, while WAT stays fixed at UTC+1 year-round. The gap changes seasonally when GMT transitions in or out of DST. The live converter auto-adjusts so you always see the right offset.

The best meeting window is where standard working hours (9 AM – 6 PM) overlap in both zones. Since GMT is 1h behind of WAT, mornings in the earlier zone align with afternoons or evenings in the later zone. Target 8 AM – 11 AM in the earlier-offset zone to keep both sides in reasonable hours. The meeting hours table above shows the exact recommended slots for this pair. Any time where one side falls before 7 AM or after 9 PM is best avoided for regular team calls.

Type any time directly into the GMT field in the bidirectional converter above — it instantly shows the WAT result. Alternatively, add 1 hour from the GMT time manually. For a dedicated reverse page, visit: GMT to WAT converter ↗.

For some hours of the day the conversion does cross midnight into the next or previous calendar day. When the converted time passes 11:59 PM, the date advances — the converter shows "+1 Day". When it goes before 12:00 AM, the date moves back — "-1 Day" appears. The 24-hour reference table also shows day changes in the Day column. Always check the date indicator when sending calendar invites across these two zones to avoid accidentally booking on the wrong date.

West Africa Time (WAT) is used in: Lagos, Kano, Ibadan, Abuja, Port Harcourt, Benin City, Kaduna. The zone operates at UTC+1, with a constant offset all year.

Greenwich Mean Time (GMT) covers: London, Dublin, Lisbon, Reykjavik, Accra, Abidjan, Dakar. It runs at UTC+0 / UTC+1 (BST)and observes Daylight Saving Time seasonally. Use the live clocks at the top of this page to see the current local time in both zones side by side.

The standard offset is 1h behind, but this can shift by one hour during DST transition periods. When GMT moves to or from its daylight variant, the gap changes. The live converter always shows the current accurate offset.

When creating a recurring meeting that spans WAT and GMT, set the event timezone in your calendar app using the IANA timezone names: Africa/Lagos for WAT and Europe/London for GMT. Using IANA names rather than fixed UTC offsets ensures the calendar app automatically adjusts future occurrences for any DST changes, so you never accidentally schedule at the wrong time after a clock transition. For a quick lookup of any specific time, the converter on this page is the fastest way to verify both sides before you send the invite.

No. None of the countries in the West Africa Time (WAT) zone — including Nigeria, Niger, Cameroon, Chad, and the Central African Republic — observe Daylight Saving Time. WAT is fixed at UTC+1 all year. This means the WAT side of any timezone pair is always constant, and any seasonal variation in the WAT–GMT offset comes from the other zone (GMT observing DST).