Weather2 on Twitter Weather2 on Facebook Weather2 on YouTube Weather2 blog

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Port Lincoln 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Port Lincoln

South Australia, Australia

Long range weather outlook for Port Lincoln includes 14 day forecast summary:

The forecast for Port Lincoln in the coming two weeks is predicting the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 24°C expected on the afternoon of Thursday 23rd. The average minimum temperature will be 14°C, dipping to its lowest on the morning of Saturday 1st at 11°C. The coming 14 days will have most days seeing a little rain. The indicators are that Tuesday 28th will have the most precipitation with an accumulation of around 2.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
May
18:30

NNE
NNE

4 / 6 mph 73 / 76°F 46% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 89%
Most Significant Cloud Type: medium
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:30

NNE
NNE

11 / 19 mph 69 / 69°F 49% 1018 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 82%
Most Significant Cloud Type: medium
48%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 24
May
00:30

NNW
NNW

11 / 22 mph 66 / 66°F 51% 1016 mb
Low level cloud: 0%
Mid level cloud: 83%
High level cloud: 79%
Most Significant Cloud Type: medium
85%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:30

NNW
NNW

15 / 32 mph 64 / 64°F 50% 1015 mb
Low level cloud: 0%
Mid level cloud: 80%
High level cloud: 19%
Most Significant Cloud Type: medium
81%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:30

W
W

14 / 24 mph 62 / 62°F 83% 1015 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:30

WSW
WSW

15 / 17 mph 67 / 66°F 79% 1018 mb
Low level cloud: 82%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:30

W
W

13 / 15 mph 72 / 71°F 68% 1018 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:30

W
W

14 / 16 mph 74 / 77°F 65% 1017 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:30

W
W

15 / 17 mph 71 / 71°F 72% 1018 mb
Low level cloud: 91%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:30

WNW
WNW

15 / 17 mph 68 / 68°F 72% 1018 mb
Low level cloud: 43%
Mid level cloud: 4%
High level cloud: 10%
Most Significant Cloud Type: low
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sat 25
May
00:30

WNW
WNW

15 / 24 mph 60 / 60°F 78% 1018 mb
Low level cloud: 28%
Mid level cloud: 26%
High level cloud: 7%
Most Significant Cloud Type: low
37%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:30

W
W

14 / 26 mph 59 / 56°F 77% 1017 mb
Low level cloud: 33%
Mid level cloud: 24%
High level cloud: 11%
Most Significant Cloud Type: low
43%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:30

W
W

14 / 28 mph 57 / 54°F 76% 1017 mb
Low level cloud: 55%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
63%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:30

WSW
WSW

15 / 21 mph 61 / 61°F 67% 1018 mb
Low level cloud: 61%
Mid level cloud: 43%
High level cloud: 5%
Most Significant Cloud Type: low
76%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
12:30

WSW
WSW

18 / 21 mph 64 / 64°F 60% 1018 mb
Low level cloud: 82%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
15:30

WSW
WSW

19 / 22 mph 67 / 66°F 58% 1018 mb
Low level cloud: 51%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:30

WSW
WSW

15 / 17 mph 64 / 64°F 65% 1019 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:30

WSW
WSW

15 / 17 mph 62 / 62°F 65% 1021 mb
Low level cloud: 70%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 26
May
00:30

WSW
WSW

13 / 15 mph 59 / 56°F 62% 1021 mb
Low level cloud: 71%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:30

WSW
WSW

13 / 17 mph 57 / 55°F 63% 1020 mb
Low level cloud: 84%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
84%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:30

W
W

14 / 23 mph 57 / 53°F 64% 1020 mb
Low level cloud: 68%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: low
70%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:30

W
W

17 / 21 mph 59 / 59°F 65% 1021 mb
Low level cloud: 84%
Mid level cloud: 0%
High level cloud: 78%
Most Significant Cloud Type: low
93%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:30

W
W

20 / 23 mph 62 / 62°F 64% 1020 mb
Low level cloud: 89%
Mid level cloud: 7%
High level cloud: 61%
Most Significant Cloud Type: low
98%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:30

WSW
WSW

20 / 24 mph 63 / 63°F 66% 1019 mb
Low level cloud: 88%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
18:30

WSW
WSW

18 / 22 mph 62 / 62°F 68% 1020 mb
Low level cloud: 60%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:30

WSW
WSW

19 / 22 mph 60 / 60°F 68% 1021 mb
Low level cloud: 87%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Mon 27
May
00:30

WSW
WSW

17 / 20 mph 59 / 59°F 67% 1021 mb
Low level cloud: 89%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:30

SW
SW

16 / 22 mph 59 / 55°F 65% 1021 mb
Low level cloud: 89%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
06:30

SW
SW

16 / 22 mph 58 / 55°F 66% 1023 mb
Low level cloud: 60%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
60%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:30

SW
SW

14 / 17 mph 60 / 60°F 63% 1024 mb
Low level cloud: 53%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:30

SW
SW

13 / 15 mph 62 / 61°F 59% 1023 mb
Low level cloud: 72%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:30

WSW
WSW

13 / 15 mph 63 / 62°F 60% 1022 mb
Low level cloud: 54%
Mid level cloud: 6%
High level cloud: 50%
Most Significant Cloud Type: low
62%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:30

W
W

11 / 13 mph 61 / 61°F 67% 1022 mb
Low level cloud: 60%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:30

W
W

15 / 20 mph 60 / 60°F 69% 1023 mb
Low level cloud: 72%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Tue 28
May
00:30

W
W

16 / 19 mph 61 / 61°F 67% 1021 mb
Low level cloud: 39%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:30

W
W

16 / 23 mph 59 / 59°F 68% 1020 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: low
38%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:30

W
W

18 / 28 mph 58 / 55°F 74% 1020 mb
Low level cloud: 80%
Mid level cloud: 66%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:30

WSW
WSW

19 / 25 mph 62 / 61°F 65% 1020 mb
Low level cloud: 32%
Mid level cloud: 27%
High level cloud: 22%
Most Significant Cloud Type: low
43%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
12:30

WSW
WSW

22 / 26 mph 64 / 64°F 61% 1019 mb
Low level cloud: 85%
Mid level cloud: 14%
High level cloud: 41%
Most Significant Cloud Type: low
95%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:30

WSW
WSW

21 / 24 mph 66 / 65°F 68% 1018 mb
Low level cloud: 70%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:30

WSW
WSW

19 / 22 mph 64 / 64°F 70% 1019 mb
Low level cloud: 38%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: low
56%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:30

WSW
WSW

19 / 23 mph 62 / 62°F 70% 1020 mb
Low level cloud: 33%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Wed 29
May
00:30

SW
SW

20 / 28 mph 57 / 53°F 70% 1020 mb
Low level cloud: 81%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:30

SW
SW

19 / 27 mph 56 / 51°F 68% 1020 mb
Low level cloud: 86%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:30

SW
SW

19 / 28 mph 55 / 50°F 67% 1022 mb
Low level cloud: 73%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:30

SW
SW

18 / 20 mph 58 / 54°F 68% 1024 mb
Low level cloud: 87%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
12:30

SW
SW

18 / 21 mph 61 / 61°F 68% 1024 mb
Low level cloud: 86%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
15:30

SSW
SSW

19 / 21 mph 63 / 62°F 67% 1024 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:30

SSW
SSW

16 / 19 mph 61 / 61°F 66% 1026 mb
Low level cloud: 62%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:30

SSW
SSW

16 / 19 mph 59 / 55°F 68% 1028 mb
Low level cloud: 86%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 30
May
03:30

NW
NW

12 / 17 mph 58 / 56°F 81% 1032 mb
Low level cloud: 82%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
88%
0.00 In
09:30

WNW
WNW

4 / 4 mph 56 / 56°F 64% 1037 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
15:30

W
W

4 / 5 mph 62 / 62°F 66% 1034 mb
Low level cloud: 70%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.00 In
21:30

S
S

12 / 16 mph 57 / 54°F 71% 1035 mb
Low level cloud: 89%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.01 In
Fri 31
May
03:30

E
E

9 / 14 mph 58 / 56°F 74% 1039 mb
Low level cloud: 67%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: low
68%
0.00 In
09:30

ENE
ENE

7 / 11 mph 56 / 54°F 67% 1039 mb
Low level cloud: 71%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
71%
0.00 In
15:30

ESE
ESE

10 / 11 mph 63 / 63°F 66% 1038 mb
Low level cloud: 72%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.00 In
21:30

E
E

3 / 4 mph 60 / 60°F 68% 1036 mb
Low level cloud: 45%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
45%
0.00 In
Sat 01
Jun
03:30

SE
SE

11 / 17 mph 60 / 60°F 77% 1038 mb
Low level cloud: 27%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.01 In
09:30

NNW
NNW

4 / 5 mph 57 / 57°F 71% 1036 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
15:30

SE
SE

13 / 15 mph 64 / 64°F 71% 1035 mb
Low level cloud: 59%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.01 In
21:30

ESE
ESE

1 / 1 mph 61 / 61°F 72% 1034 mb
Low level cloud: 19%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.00 In
Sun 02
Jun
03:30

SE
SE

14 / 19 mph 60 / 60°F 70% 1034 mb
Low level cloud: 80%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
80%
0.02 In
09:30

WNW
WNW

3 / 4 mph 58 / 59°F 73% 1034 mb
Low level cloud: 90%
Mid level cloud: 3%
High level cloud: 21%
Most Significant Cloud Type: low
93%
0.00 In
15:30

ESE
ESE

13 / 16 mph 64 / 64°F 66% 1032 mb
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.03 In
21:30

S
S

7 / 11 mph 58 / 57°F 72% 1033 mb
Low level cloud: 30%
Mid level cloud: 24%
High level cloud: 11%
Most Significant Cloud Type: low
39%
0.01 In
Mon 03
Jun
03:30

ESE
ESE

10 / 13 mph 59 / 59°F 78% 1033 mb
Low level cloud: 55%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.01 In
09:30

SE
SE

11 / 16 mph 59 / 57°F 75% 1033 mb
Low level cloud: 72%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: low
74%
0.08 In
15:30

SE
SE

11 / 14 mph 65 / 65°F 64% 1032 mb
Low level cloud: 21%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.02 In
21:30

SE
SE

12 / 13 mph 59 / 59°F 70% 1033 mb
Low level cloud: 67%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
67%
0.00 In
Tue 04
Jun
03:30

SE
SE

9 / 12 mph 59 / 59°F 72% 1033 mb
Low level cloud: 45%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
45%
0.01 In
09:30

SE
SE

11 / 13 mph 57 / 54°F 66% 1035 mb
Low level cloud: 58%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
58%
0.01 In
15:30

SSE
SSE

11 / 15 mph 67 / 67°F 62% 1032 mb
Low level cloud: 54%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.04 In
21:30

SE
SE

10 / 11 mph 57 / 55°F 67% 1034 mb
Low level cloud: 50%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
51%
0.00 In
Wed 05
Jun
03:30

SE
SE

6 / 10 mph 58 / 58°F 73% 1032 mb
Low level cloud: 20%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.02 In
09:30

SE
SE

9 / 13 mph 57 / 55°F 60% 1035 mb
Low level cloud: 40%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
40%
0.01 In
15:30

SSE
SSE

5 / 6 mph 64 / 64°F 63% 1030 mb
Low level cloud: 12%
Mid level cloud: 40%
High level cloud: 0%
Most Significant Cloud Type: medium
72%
0.04 In
21:30

ESE
ESE

10 / 13 mph 57 / 55°F 66% 1035 mb
Low level cloud: 50%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
51%
0.01 In
Thu 06
Jun
03:30

E
E

8 / 11 mph 58 / 57°F 81% 1031 mb
Low level cloud: 45%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.02 In
09:30

E
E

10 / 15 mph 56 / 53°F 64% 1034 mb
Low level cloud: 71%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
71%
0.01 In
15:30

SE
SE

9 / 12 mph 65 / 65°F 68% 1030 mb
Low level cloud: 76%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.04 In
21:30

ENE
ENE

11 / 13 mph 57 / 54°F 63% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 42%
Most Significant Cloud Type: high
42%
0.00 In
Fri 07
Jun
03:30

E
E

10 / 14 mph 57 / 54°F 69% 1031 mb
Low level cloud: 76%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.00 In
09:30

NNE
NNE

9 / 11 mph 57 / 54°F 65% 1029 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 14%
Most Significant Cloud Type: medium
8%
0.00 In
15:30

E
E

11 / 12 mph 61 / 62°F 66% 1029 mb
Low level cloud: 62%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
62%
0.01 In
21:30

NE
NE

10 / 16 mph 57 / 55°F 58% 1025 mb
Low level cloud: 0%
Mid level cloud: 40%
High level cloud: 34%
Most Significant Cloud Type: medium
41%
0.00 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