WEST to GMT Time Converter

Convert Western European Summer Time (WEST) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is same time.

Lisbon · Western European Summer Time
13:34:35
Monday, May 11, 2026
GMT+1 · UTC+01:00
London · Greenwich Mean Time
13:34:35
Monday, May 11, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: WEST (Lisbon)
To: GMT (London)
--:--

Daylight Saving status right now

WEST (Western European Summer Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00
GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

When can WEST and GMT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
WEST
GMT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Lisbon (WEST). Each row shows the local working-hours state in that zone for the same moment in time.
8 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–16:00 WEST (09:00–16:00 GMT).

Hour-by-hour WEST to GMT conversion table

WEST time (Lisbon)GMT time (London)Status
00:00 Mon00:00 MonOff-hours both sides
01:00 Mon01:00 MonOff-hours both sides
02:00 Mon02:00 MonOff-hours both sides
03:00 Mon03:00 MonOff-hours both sides
04:00 Mon04:00 MonOff-hours both sides
05:00 Mon05:00 MonOff-hours both sides
06:00 Mon06:00 MonOff-hours both sides
07:00 Mon07:00 MonOff-hours both sides
08:00 Mon08:00 MonOff-hours both sides
09:00 Mon09:00 MonBoth at work
10:00 Mon10:00 MonBoth at work
11:00 Mon11:00 MonBoth at work
12:00 Mon12:00 MonBoth at work
13:00 Mon13:00 MonBoth at work
14:00 Mon14:00 MonBoth at work
15:00 Mon15:00 MonBoth at work
16:00 Mon16:00 MonBoth at work
17:00 Mon17:00 MonOff-hours both sides
18:00 Mon18:00 MonOff-hours both sides
19:00 Mon19:00 MonOff-hours both sides
20:00 Mon20:00 MonOff-hours both sides
21:00 Mon21:00 MonOff-hours both sides
22:00 Mon22:00 MonOff-hours both sides
23:00 Mon23:00 MonOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Western European Summer Time (WEST)
IANA identifier
Europe/Lisbon
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
Lisbon
Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Lisbon and London

London
Sunrise
05:16
Sunset
20:39
Solar noon
12:58
Daylight
15h 23m

Related converters

GMT to WEST (reverse)WEST to ESTWEST to PSTWEST to UTCWEST to CETWEST to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Lisbon or time in London.

Frequently asked questions

What is the time difference between WEST and GMT right now?+
GMT (Greenwich Mean Time) is currently same time WEST (Western European Summer Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does WEST or GMT observe daylight saving time?+
WEST: observes daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between WEST and GMT?+
The strongest overlap is 09:00–16:00 WEST (09:00–16:00 GMT), giving 8 hours when both sides are within standard 9am-5pm working hours.
What time is it in London when it is 12:00 noon in Lisbon?+
When it is 12:00 Mon in Lisbon (WEST), it is 12:00 Mon in London (GMT).
Which IANA time zone identifiers are used for WEST and GMT?+
WEST maps to "Europe/Lisbon" in the IANA database. GMT maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Lisbon ahead of or behind London?+
Whether Lisbon (WEST) is ahead of or behind London (GMT) depends on the current UTC offsets. Right now GMT is same time WEST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for WEST and GMT?+
WEST is UTC+01:00 (GMT+1) and GMT is UTC+01:00 (GMT+1). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both WEST and GMT?+
Yes. There are 8 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–16:00 WEST.