WAT to GMT Time Converter
Convert West Africa Time to Greenwich Mean Time. Right now, WAT is 0 hours behind GMT.
Time Zone Converter
Click any hour to see what it lands on in every city. The first row's hours run 12am to 11pm — every other row is its local time at the same instant.
When it's this time in Lagos:
| Lagos | London |
|---|---|
| 6:00 AM | 6:00 AM |
| 9:00 AM | 9:00 AM |
| 12:00 PM | 12:00 PM |
| 3:00 PM | 3:00 PM |
| 6:00 PM | 6:00 PM |
| 9:00 PM | 9:00 PM |
About WAT and GMT
WAT (West Africa Time) covers Nigeria, Cameroon, and Angola and is anchored to the IANA zone Africa/Lagos. It does not observe daylight saving time — the offset stays fixed all year.
GMT (Greenwich Mean Time) covers UK, Ireland, Iceland, and Portugal via Europe/London. It observes daylight saving time, so the gap between these two zones shifts twice a year.
Because at least one of these zones uses DST, the time difference between WAT and GMT is not constant — it shifts by an hour during the spring and autumn DST transitions. The hour grid below recomputes the difference for any specific date you click, using the IANA rules baked into your browser.
FAQ
- How many hours difference between WAT and GMT?
- Right now, WAT is 0 hours behind GMT. Because at least one of these zones observes daylight saving time, the gap shifts by an hour twice a year (spring and autumn). The hour grid above recomputes correctly for any specific date.
- What time is 9 AM WAT in GMT?
- 9 AM WAT (Lagos) is 9:00 AM GMT (London) today. Click any cell in the grid above to convert other times — the math handles DST and half-hour offsets correctly.
- Does WAT observe daylight saving time?
- No. West Africa Time stays at a fixed offset year-round. The hour grid above will show the same difference whether you check in summer or winter.
- What's the IANA timezone identifier for WAT and GMT?
- WAT → Africa/Lagos. GMT → Europe/London. We use IANA identifiers (not GMT offsets) as the source of truth so historical and future dates remain accurate, including across DST changes and political timezone shifts.
- Where can I see the overlap between WAT and GMT working hours?
- Click "Working hrs" in the toolbar above to highlight hours where all selected cities have overlapping business hours. The amber highlight shows which columns work for scheduling meetings across time zones.
- Which countries use WAT and GMT?
- WAT (West Africa Time) is used in Nigeria, Cameroon, and Angola. GMT (Greenwich Mean Time) is used in UK, Ireland, Iceland, and Portugal. If you're converting time between any of these countries, this is the right page.