WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

North Beach 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for North Beach

Maryland, United States Of America

Long range weather outlook for North Beach includes 14 day forecast summary:

Over the next 14 days the North Beach forecast suggests the average daytime maximum temperature will be around 26°C, with a high for the two weeks of 32°C expected on the afternoon of Friday 13th. The mean minimum temperature will be 19°C, dipping to its lowest on the morning of Monday 16th at 17°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. It looks like Friday 13th will have the most precipitation with an accumulation of around 18.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 07
Jun
01:00

S
S

4 / 7 mph 70 / 70°F 93% 1009 mb
Low level cloud: 14%
Mid level cloud: 38%
High level cloud: 64%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

4 / 8 mph 69 / 69°F 96% 1009 mb
Low level cloud: 38%
Mid level cloud: 44%
High level cloud: 83%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

W
W

6 / 10 mph 71 / 69°F 97% 1009 mb
Low level cloud: 57%
Mid level cloud: 51%
High level cloud: 3%
Most Significant Cloud Type: low
75%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

NW
NW

5 / 9 mph 76 / 77°F 91% 1009 mb
Low level cloud: 29%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
13:00

NW
NW

4 / 5 mph 82 / 81°F 66% 1007 mb
Low level cloud: 4%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

3 / 4 mph 83 / 82°F 63% 1007 mb
Low level cloud: 28%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

5 / 9 mph 79 / 79°F 77% 1008 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 10%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

6 / 11 mph 72 / 76°F 85% 1008 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 25%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 08
Jun
19:00

ENE
ENE

10 / 14 mph 72 / 76°F 87% 1007 mb
Low level cloud: 88%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

11 / 13 mph 69 / 69°F 93% 1009 mb
Low level cloud: 92%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 09
Jun
01:00

E
E

10 / 13 mph 66 / 66°F 94% 1008 mb
Low level cloud: 91%
Mid level cloud: 14%
High level cloud: 5%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

3 / 5 mph 65 / 65°F 93% 1010 mb
Low level cloud: 99%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

8 / 11 mph 66 / 65°F 93% 1011 mb
Low level cloud: 86%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

4 / 4 mph 69 / 69°F 85% 1012 mb
Low level cloud: 91%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

3 / 4 mph 77 / 77°F 76% 1012 mb
Low level cloud: 40%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

5 / 7 mph 76 / 77°F 81% 1011 mb
Low level cloud: 31%
Mid level cloud: 4%
High level cloud: 96%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

9 / 14 mph 74 / 76°F 88% 1011 mb
Low level cloud: 4%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

10 / 17 mph 69 / 69°F 93% 1011 mb
Low level cloud: 30%
Mid level cloud: 19%
High level cloud: 67%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 10
Jun
01:00

ESE
ESE

7 / 11 mph 68 / 68°F 94% 1011 mb
Low level cloud: 46%
Mid level cloud: 16%
High level cloud: 63%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

6 / 9 mph 67 / 67°F 96% 1010 mb
Low level cloud: 63%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

1 / 2 mph 71 / 69°F 95% 1011 mb
Low level cloud: 75%
Mid level cloud: 17%
High level cloud: 71%
Most Significant Cloud Type: low
89%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

NNW
NNW

6 / 9 mph 72 / 71°F 89% 1012 mb
Low level cloud: 84%
Mid level cloud: 29%
High level cloud: 3%
Most Significant Cloud Type: low
94%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

NNE
NNE

5 / 7 mph 78 / 78°F 78% 1012 mb
Low level cloud: 33%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

ENE
ENE

3 / 5 mph 79 / 78°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SSE
SSE

6 / 12 mph 75 / 76°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

4 / 9 mph 70 / 70°F 90% 1014 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 11
Jun
01:00

W
W

4 / 10 mph 68 / 68°F 89% 1015 mb
Low level cloud: 0%
Mid level cloud: 73%
High level cloud: 0%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

6 / 12 mph 67 / 67°F 90% 1016 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 33%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NW
NW

4 / 7 mph 72 / 69°F 78% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

3 / 4 mph 82 / 80°F 57% 1018 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

6 / 8 mph 83 / 81°F 59% 1017 mb
Low level cloud: 5%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

2 / 3 mph 86 / 83°F 52% 1017 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

1 / 2 mph 79 / 78°F 73% 1018 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

1 / 2 mph 72 / 76°F 74% 1019 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 12
Jun
01:00

WSW
WSW

4 / 7 mph 70 / 70°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NW
NW

4 / 9 mph 68 / 68°F 73% 1019 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
07:00

NNE
NNE

3 / 4 mph 75 / 76°F 68% 1020 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

2 / 2 mph 81 / 80°F 58% 1020 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

5 / 7 mph 83 / 81°F 61% 1019 mb
Low level cloud: 4%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

8 / 15 mph 80 / 80°F 69% 1017 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

9 / 16 mph 79 / 79°F 79% 1017 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

6 / 11 mph 73 / 77°F 91% 1018 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 13
Jun
01:00

WSW
WSW

2 / 4 mph 71 / 71°F 93% 1017 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

4 / 8 mph 69 / 69°F 93% 1017 mb
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

6 / 9 mph 77 / 77°F 87% 1017 mb
Low level cloud: 8%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

5 / 7 mph 85 / 86°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

6 / 10 mph 90 / 93°F 55% 1015 mb
Low level cloud: 9%
Mid level cloud: 24%
High level cloud: 33%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

7 / 16 mph 84 / 86°F 71% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

5 / 10 mph 77 / 78°F 91% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 34%
Most Significant Cloud Type: medium
47%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

E
E

9 / 15 mph 72 / 76°F 96% 1016 mb
Low level cloud: 11%
Mid level cloud: 44%
High level cloud: 87%
Most Significant Cloud Type: medium
77%
Expect 0.6 In of precipitation over the past 3 hours.
0.6 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 14
Jun
01:00

SW
SW

6 / 13 mph 71 / 71°F 80% 1014 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: medium
28%
0.0 In
07:00

W
W

4 / 8 mph 71 / 71°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 46%
Most Significant Cloud Type: medium
45%
0.0 In
13:00

NE
NE

2 / 5 mph 85 / 89°F 57% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 36%
Most Significant Cloud Type: medium
6%
0.0 In
19:00

S
S

4 / 8 mph 79 / 85°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 14%
Most Significant Cloud Type: medium
11%
0.0 In
Sun 15
Jun
01:00

W
W

6 / 13 mph 75 / 79°F 86% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
07:00

NE
NE

10 / 21 mph 65 / 65°F 88% 1021 mb
Low level cloud: 89%
Mid level cloud: 63%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

E
E

12 / 24 mph 69 / 69°F 60% 1024 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 44%
Most Significant Cloud Type: medium
49%
0.0 In
19:00

E
E

9 / 20 mph 70 / 70°F 78% 1021 mb
Low level cloud: 82%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
82%
0.0 In
Mon 16
Jun
01:00

ESE
ESE

9 / 18 mph 64 / 64°F 84% 1024 mb
Low level cloud: 35%
Mid level cloud: 70%
High level cloud: 63%
Most Significant Cloud Type: low
66%
0.0 In
07:00

E
E

6 / 13 mph 63 / 63°F 82% 1022 mb
Low level cloud: 6%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
48%
0.0 In
13:00

ESE
ESE

11 / 23 mph 69 / 69°F 62% 1024 mb
Low level cloud: 0%
Mid level cloud: 56%
High level cloud: 16%
Most Significant Cloud Type: medium
56%
0.0 In
19:00

SW
SW

2 / 4 mph 69 / 69°F 76% 1020 mb
Low level cloud: 88%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.0 In
Tue 17
Jun
01:00

ESE
ESE

13 / 28 mph 65 / 65°F 87% 1023 mb
Low level cloud: 98%
Mid level cloud: 96%
High level cloud: 97%
Most Significant Cloud Type: low
100%
0.0 In
07:00

SSE
SSE

5 / 11 mph 69 / 69°F 85% 1020 mb
Low level cloud: 71%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
76%
0.0 In
13:00

SSE
SSE

12 / 24 mph 69 / 69°F 92% 1022 mb
Low level cloud: 95%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.5 In
19:00

SSE
SSE

12 / 25 mph 72 / 76°F 83% 1018 mb
Low level cloud: 3%
Mid level cloud: 8%
High level cloud: 12%
Most Significant Cloud Type: low
7%
0.0 In
Wed 18
Jun
01:00

SE
SE

8 / 17 mph 66 / 66°F 89% 1021 mb
Low level cloud: 20%
Mid level cloud: 44%
High level cloud: 85%
Most Significant Cloud Type: low
45%
0.2 In
07:00

S
S

11 / 23 mph 71 / 71°F 88% 1019 mb
Low level cloud: 21%
Mid level cloud: 13%
High level cloud: 87%
Most Significant Cloud Type: low
36%
0.0 In
13:00

E
E

8 / 16 mph 68 / 68°F 88% 1021 mb
Low level cloud: 91%
Mid level cloud: 85%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.1 In
19:00

S
S

14 / 30 mph 72 / 77°F 94% 1017 mb
Low level cloud: 59%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
87%
0.5 In
Thu 19
Jun
01:00

NW
NW

5 / 11 mph 67 / 67°F 95% 1018 mb
Low level cloud: 38%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.0 In
07:00

SSW
SSW

6 / 14 mph 72 / 77°F 95% 1019 mb
Low level cloud: 94%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.7 In
13:00

WNW
WNW

10 / 20 mph 88 / 94°F 57% 1015 mb
Low level cloud: 57%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.0 In
19:00

SSE
SSE

8 / 17 mph 75 / 79°F 82% 1018 mb
Low level cloud: 14%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
Fri 20
Jun
01:00

N
N

7 / 16 mph 71 / 71°F 81% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

SSW
SSW

5 / 11 mph 75 / 79°F 89% 1017 mb
Low level cloud: 34%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
13:00

S
S

4 / 8 mph 87 / 93°F 59% 1013 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 16%
Most Significant Cloud Type: low
4%
0.0 In
19:00

SSE
SSE

14 / 29 mph 77 / 80°F 82% 1010 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Sat 21
Jun
01:00

SW
SW

8 / 16 mph 75 / 79°F 89% 1007 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
9%
0.0 In
07:00

SW
SW

6 / 14 mph 78 / 83°F 90% 1007 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 28%
Most Significant Cloud Type: medium
7%
0.0 In
13:00

SW
SW

9 / 18 mph 91 / 98°F 51% 1003 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

SW
SW

7 / 16 mph 74 / 78°F 92% 1007 mb
Low level cloud: 13%
Mid level cloud: 40%
High level cloud: 17%
Most Significant Cloud Type: medium
77%
0.6 In
Sun 22
Jun
01:00

WSW
WSW

8 / 17 mph 71 / 71°F 96% 1003 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
0.5 In
07:00

NNE
NNE

11 / 23 mph 71 / 71°F 77% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

NW
NW

11 / 23 mph 81 / 83°F 52% 1005 mb
Low level cloud: 7%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
66%
0.0 In
19:00

SE
SE

9 / 19 mph 75 / 78°F 75% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In

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