MARINE WEATHER

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Marine Weather

Marine weather for Portland

Lat: -38.33333, Lon: 141.60000

American Samoa, Global Ports

DATE WIND WAVES SWELL WEATHER TEMPERATURE  
Date Local Time Dir Speed Gust Hsig Ht. Dir Height Period Icon Air Feels Like Cloud Precip RH Pressure Vis
Units =>degktsktsmdegmsecs °F°F%In%mbmiles
Sat 18
May
07:00

144°

13153.9

180°

3.914.4484400.06010346
 10:00

147°

10113.8

180°

3.714.1524800.05310356
 13:00

170°

773.5

180°

3.513.6545200.05210346
 16:00

225°

683.3

180°

3.313.4555300.05510326
 19:00

242°

8123.1

180°

3.113.2535000.06710326
 22:00

248°

12182.9

180°

2.913.1514700.07510316
Sun 19
May
01:00

249°

16222.8

180°

2.813.0494400.07910296
 04:00

244°

18242.8

180°

2.712.95450170.07710286
 07:00

244°

19242.8

180°

2.712.95551730.07810276
 10:00

248°

20262.9

180°

2.912.957531000.07810271
 13:00

241°

20263.1

180°

3.112.65854400.08410255
 16:00

224°

21263.5

180°

3.512.65854360.08510255
 19:00

214°

19223.7

180°

3.612.95653940.08910266
 22:00

196°

18243.8

180°

3.612.95652280.08310275
The 7 day weather forecast summary for Portland, American Samoa, Global Ports:

Taking a look at the forecast over the coming week and the average daytime maximum will be around 14°C, with a high of 15°C expected on Thursday morning. The average minimum temperature for the week ahead will be around 10°C, dipping to its lowest on Friday morning at 8°C. Sunday is expected to see the most precipitation with around 4mm, or about 0.2inches anticipated. The strongest wind will be felt on Sunday morning, coming from the southwest, and reaching around 24mph, that's about 39km/h.

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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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.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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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.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

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