WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Gebze 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Gebze

Turkey

Long range weather outlook for Gebze includes 14 day forecast summary:

Taking a look at Gebze over the coming two weeks and the average daytime maximum temperature will be around 14°C, with a high for the two weeks of 26°C expected on the afternoon of Sunday 16th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Friday 21st at 2°C. Expect the following 14 days ahead to remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 12
Mar
20:00

WSW
WSW

3 / 5 mph 68 / 68°F 52% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 98%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

S
S

4 / 8 mph 64 / 64°F 55% 1014 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 48%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 13
Mar
02:00

SE
SE

5 / 10 mph 63 / 63°F 57% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

S
S

3 / 7 mph 61 / 61°F 58% 1012 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 11%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

3 / 6 mph 62 / 60°F 57% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 55%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SE
SE

6 / 12 mph 66 / 64°F 47% 1012 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

SE
SE

5 / 10 mph 73 / 75°F 36% 1011 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 3%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

W
W

3 / 6 mph 73 / 75°F 40% 1011 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 100%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

WSW
WSW

1 / 3 mph 66 / 66°F 47% 1012 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 26%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SSE
SSE

4 / 9 mph 64 / 64°F 48% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 53%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 14
Mar
02:00

SSE
SSE

4 / 8 mph 62 / 62°F 52% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 19%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

S
S

2 / 5 mph 61 / 61°F 54% 1014 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 4%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

3 / 6 mph 63 / 61°F 54% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 12%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SE
SE

3 / 6 mph 66 / 65°F 42% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

W
W

5 / 10 mph 68 / 66°F 43% 1016 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

W
W

4 / 8 mph 68 / 66°F 51% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SE
SE

4 / 9 mph 64 / 64°F 48% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SSE
SSE

4 / 8 mph 64 / 64°F 54% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 9%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 15
Mar
02:00

SSE
SSE

4 / 9 mph 64 / 64°F 56% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

SSE
SSE

5 / 10 mph 62 / 62°F 58% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 13%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

4 / 9 mph 64 / 63°F 58% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 6%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

SSW
SSW

6 / 13 mph 73 / 75°F 41% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

W
W

7 / 15 mph 70 / 70°F 47% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 93%
Most Significant Cloud Type: high
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

W
W

3 / 6 mph 69 / 67°F 55% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

SE
SE

4 / 9 mph 66 / 66°F 50% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

SE
SE

5 / 11 mph 66 / 66°F 48% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 16
Mar
02:00

SSE
SSE

6 / 12 mph 66 / 66°F 52% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

SSE
SSE

6 / 12 mph 63 / 63°F 53% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

SSE
SSE

4 / 8 mph 67 / 66°F 52% 1013 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 18%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

S
S

5 / 9 mph 76 / 76°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 20%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

W
W

7 / 11 mph 79 / 77°F 37% 1011 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 35%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

W
W

2 / 4 mph 71 / 69°F 56% 1012 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 49%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

E
E

8 / 16 mph 59 / 57°F 67% 1012 mb
Low level cloud: 0%
Mid level cloud: 88%
High level cloud: 19%
Most Significant Cloud Type: medium
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

NNE
NNE

8 / 13 mph 51 / 48°F 82% 1015 mb
Low level cloud: 1%
Mid level cloud: 66%
High level cloud: 99%
Most Significant Cloud Type: medium
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 17
Mar
02:00

NE
NE

8 / 11 mph 51 / 47°F 87% 1015 mb
Low level cloud: 19%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

NE
NE

11 / 15 mph 48 / 44°F 89% 1017 mb
Low level cloud: 96%
Mid level cloud: 47%
High level cloud: 16%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

NE
NE

11 / 16 mph 47 / 42°F 87% 1018 mb
Low level cloud: 94%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

NE
NE

10 / 15 mph 47 / 43°F 84% 1019 mb
Low level cloud: 96%
Mid level cloud: 52%
High level cloud: 57%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NE
NE

12 / 18 mph 47 / 42°F 82% 1019 mb
Low level cloud: 93%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

NE
NE

13 / 20 mph 47 / 40°F 83% 1019 mb
Low level cloud: 98%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

NE
NE

13 / 19 mph 45 / 39°F 83% 1020 mb
Low level cloud: 91%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

NE
NE

12 / 18 mph 45 / 38°F 80% 1021 mb
Low level cloud: 82%
Mid level cloud: 17%
High level cloud: 1%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 18
Mar
02:00

NE
NE

12 / 19 mph 43 / 37°F 79% 1021 mb
Low level cloud: 81%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
05:00

ENE
ENE

13 / 21 mph 42 / 35°F 77% 1021 mb
Low level cloud: 58%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
08:00

ENE
ENE

13 / 21 mph 43 / 36°F 69% 1022 mb
Low level cloud: 2%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
11:00

ENE
ENE

15 / 25 mph 47 / 40°F 47% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
14:00

NE
NE

18 / 26 mph 49 / 43°F 50% 1021 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
17:00

NE
NE

20 / 25 mph 48 / 41°F 64% 1021 mb
Low level cloud: 4%
Mid level cloud: 9%
High level cloud: 7%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
20:00

NE
NE

22 / 25 mph 46 / 38°F 76% 1023 mb
Low level cloud: 96%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
23:00

NE
NE

20 / 23 mph 44 / 36°F 76% 1023 mb
Low level cloud: 77%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 19
Mar
02:00

ENE
ENE

9 / 12 mph 53 / 51°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
08:00

ENE
ENE

7 / 11 mph 50 / 48°F 86% 1016 mb
Low level cloud: 88%
Mid level cloud: 13%
High level cloud: 2%
Most Significant Cloud Type: low
92%
0.0 In
14:00

NE
NE

22 / 34 mph 41 / 32°F 74% 1027 mb
Low level cloud: 74%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
20:00

NE
NE

17 / 21 mph 44 / 36°F 74% 1023 mb
Low level cloud: 96%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Thu 20
Mar
02:00

NE
NE

18 / 31 mph 37 / 27°F 69% 1029 mb
Low level cloud: 59%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.0 In
08:00

WNW
WNW

9 / 12 mph 46 / 41°F 75% 1023 mb
Low level cloud: 42%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
44%
0.0 In
14:00

NE
NE

1 / 2 mph 64 / 64°F 58% 1018 mb
Low level cloud: 0%
Mid level cloud: 88%
High level cloud: 32%
Most Significant Cloud Type: medium
89%
0.0 In
20:00

NNE
NNE

15 / 23 mph 42 / 34°F 89% 1025 mb
Low level cloud: 91%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Fri 21
Mar
02:00

N
N

9 / 16 mph 40 / 34°F 71% 1030 mb
Low level cloud: 29%
Mid level cloud: 82%
High level cloud: 0%
Most Significant Cloud Type: low
57%
0.0 In
08:00

NNE
NNE

14 / 23 mph 42 / 34°F 66% 1024 mb
Low level cloud: 11%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.0 In
14:00

N
N

18 / 36 mph 42 / 33°F 76% 1029 mb
Low level cloud: 66%
Mid level cloud: 57%
High level cloud: 40%
Most Significant Cloud Type: low
90%
0.1 In
20:00

NNE
NNE

12 / 22 mph 45 / 38°F 85% 1024 mb
Low level cloud: 94%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.1 In
Sat 22
Mar
02:00

NNW
NNW

5 / 10 mph 41 / 38°F 81% 1028 mb
Low level cloud: 83%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
08:00

NNW
NNW

6 / 11 mph 41 / 38°F 88% 1024 mb
Low level cloud: 84%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.1 In
14:00

NE
NE

12 / 24 mph 47 / 42°F 62% 1024 mb
Low level cloud: 94%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.0 In
20:00

NNE
NNE

8 / 16 mph 45 / 40°F 77% 1024 mb
Low level cloud: 45%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.1 In
Sun 23
Mar
02:00

ENE
ENE

4 / 9 mph 50 / 48°F 75% 1023 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
08:00

SSW
SSW

2 / 5 mph 44 / 43°F 71% 1023 mb
Low level cloud: 44%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
52%
0.0 In
14:00

NNE
NNE

3 / 6 mph 54 / 54°F 57% 1023 mb
Low level cloud: 6%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
20:00

NE
NE

6 / 12 mph 46 / 44°F 80% 1022 mb
Low level cloud: 54%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.0 In
Mon 24
Mar
02:00

ENE
ENE

6 / 13 mph 49 / 46°F 76% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
0.0 In
08:00

N
N

7 / 14 mph 42 / 38°F 82% 1021 mb
Low level cloud: 89%
Mid level cloud: 93%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
14:00

NNE
NNE

4 / 9 mph 56 / 56°F 57% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 99%
Most Significant Cloud Type: medium
9%
0.0 In
20:00

W
W

4 / 9 mph 46 / 44°F 80% 1023 mb
Low level cloud: 94%
Mid level cloud: 90%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.0 In
Tue 25
Mar
02:00

E
E

7 / 14 mph 47 / 43°F 78% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
08:00

SSE
SSE

2 / 4 mph 46 / 46°F 78% 1023 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
14:00

NE
NE

5 / 10 mph 60 / 60°F 59% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
20:00

ENE
ENE

13 / 26 mph 45 / 39°F 80% 1023 mb
Low level cloud: 15%
Mid level cloud: 2%
High level cloud: 10%
Most Significant Cloud Type: low
16%
0.0 In
Wed 26
Mar
02:00

ENE
ENE

10 / 20 mph 42 / 37°F 83% 1012 mb
Low level cloud: 3%
Mid level cloud: 26%
High level cloud: 9%
Most Significant Cloud Type: medium
33%
0.0 In
08:00

ENE
ENE

10 / 22 mph 44 / 39°F 77% 1022 mb
Low level cloud: 34%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
14:00

NNE
NNE

8 / 17 mph 59 / 57°F 88% 1002 mb
Low level cloud: 10%
Mid level cloud: 62%
High level cloud: 67%
Most Significant Cloud Type: medium
92%
0.1 In
20:00

ENE
ENE

10 / 20 mph 48 / 44°F 75% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
0.0 In
Thu 27
Mar
02:00

N
N

1 / 2 mph 52 / 52°F 91% 1003 mb
Low level cloud: 14%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: medium
84%
0.0 In
08:00

WNW
WNW

2 / 5 mph 54 / 55°F 71% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
0.0 In
14:00

SE
SE

1 / 3 mph 60 / 60°F 79% 1001 mb
Low level cloud: 38%
Mid level cloud: 86%
High level cloud: 72%
Most Significant Cloud Type: low
76%
0.2 In
20:00

SW
SW

2 / 4 mph 63 / 63°F 74% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In

Other Locations Near to Gebze

The day label given represents the local day relative to the local time for the location you are looking at.
(More Info)

Day

This time is corrected for local time zones and where possible for daylight saving times.
(More Info)

Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
(More Info)

Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
(More Info)

Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
(More Info)

Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
(More Info)

Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
(More Info)

Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
(More Info)

Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
(More Info)

Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
(More Info)

Pressure