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Weather Forecasts

Today
High
21°
Low
15°
20%
F3
Tomorrow
High
21°
Low
14°
60%
F4
Fri, 3 Jul
High
22°
Low
15°
5%
F3
Sat, 4 Jul
High
22°
Low
16°
0%
F2
Sun, 5 Jul
High
23°
Low
17°
5%
F2
Mon, 6 Jul
High
25°
Low
17°
5%
F2
Tue, 7 Jul
High
27°
Low
18°
0%
F2
Morning
Sunrise 04:09
Max
21°
20%
F3
Rather cloudy at first with a small chance of a light shower, sunny periods developing. Wind northwest light F3 to moderate F4.
UV 7
Afternoon
Sunset 20:21
Max
21°
5%
F4
Becoming mainly sunny by mid-afternoon. Wind northwest moderate F4, occasionally light F3.
UV 7
Night
Full
Min
15°
55%
F4
Clear, becoming cloudy after midnight with patchy rain or drizzle likely later. Perhaps some mist or hill fog by dawn. Wind west to northwest moderate F4, perhaps occasionally fresh F5.

Shipping Forecast

General Situation
At 18:00UTC low 1018mb, Ireland expected to move northeast and lose its identity by Thursday. New low, 1001mb expected near Faeroes by same time.

17.5°C
Sea Temperature

Forecast from 00:00UTC Wednesday to 00:00UTC Thursday.
Wind
Northwest 2 to 4, occasionally 5.
Sea State
Smooth or slight, locally moderate later with a low swell throughout.
Weather
Risk of showers at first.
Visibility
Good or very good, perhaps locally moderate.
Outlook from 00:00UTC Thursday to 00:00UTC Friday.
Wind
West to northwest 3 to 4, occasionally 5, veering north later.
Sea State
Slight to moderate, decreasing smooth or slight later, with a low swell throughout.
Weather
Risk of drizzle, light rain and mist or fog patches until midday.
Visibility
Good or very good, perhaps locally moderate to very poor.

Understanding the Forecast

The wind speed is given in the Beaufort Scale on an 8 point compass with a variability of +-45°. Terms commonly used in association with the wind and other parts of the forecast include:

Veering - a change of wind in the clockwise sense (up to 180°)
Backing – a change of wind in the anticlockwise sense (up to 180°)
At first – within the first 12 hours
Later – within the latter 12 hours
Occasional/occasionally – lasts less than half the time (location or time specific)
At times – non-persistent (lasts more than half the forecast period)
For a time – a transient state

Waves or sea state is the forecast of the mean of the largest 7% of combined wind and swell waves. Wind waves are locally produced waves; swell waves are produced by distant strong winds. Sea state descriptions equate to the following wave heights:

Description

Height

Smooth

< 0.5m

Slight

0.5 - 1.25m

Moderate

1.25 - 2.5m

Rough

2.5 - 4.0m

Very Rough

4.0 - 6.0m

High

6.0 - 9.0m

Very High

9.0 - 14.0m

Phenomenal

> 14m

Visibility measurements equate to the following distances in nautical miles and kilometers:

Description

Distance N.Mi

Distance Km

Good

> 5 n.mi

> 10 km

Moderate

2 - 5 n.mi

3.7 - 9 km

Poor

0.6 - 2 n.mi

1.0 - 3.7 km

Very Poor

< 0.6 n.mi

< 1000 m

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